The following tables present IEM computed monthly data summaries based on daily data provided by or computed for the IEM. A download interface exists for the daily summary information. The climatology is provided by the nearest NCEI climate station (USC00454769) within the current 1991-2020 dataset.

To load shown data into Microsoft Excel, highlight the table information with your mouse and then copy/paste into Excel.

Precipitation Totals [inch]

YearJanFebMarAprMayJunJulAugSepOctNovDec
19480.000.000.000.000.000.000.000.000.000.000.000.00
19490.000.000.000.000.000.000.000.000.000.000.000.00
19500.000.000.000.000.000.000.000.000.000.000.000.00
19510.000.000.000.000.000.000.000.000.000.000.000.00
19520.000.000.000.000.000.000.000.000.000.000.000.00
19530.000.000.000.000.000.000.000.00MMMM
1954MMMMMMMMMMMM
1955MMMMMMMMMMMM
1956MMMMMMMMMMMM
1957MMMMMMMMMMMM
1958MMMMMMMMMMMM
1959MMMMMMMMMMMM
1960MMMMMMMMMMMM
1961MMMMMMMMMMMM
1962MMMMMMMMMMMM
1963MMMMMMMMMMMM
1964MMMMMMMMMMMM
1965MMMMMMMMMMMM
1966MMMMMMMMMMMM
1967MMMMMMMMMMMM
1968MMMMMMMMMMMM
1969MMMMMMMMMMMM
1970MMMMMMMMMMMM
1971MMMMMMMMMMMM
1972MMMMMMMMMMMM
1973MMMMMMMMMMMM
1974MMMMMMMMMMMM
1975MMMMMMMMMMMM
1976MMMMMMMMMMMM
1977MMMMMMMMMMMM
1978MMMMMMMMMMMM
1979MMMMMMMMMMMM
1980MMMMMMMMMMMM
1981MMMMMMMMMMMM
1982MMMMMMMMMMMM
1983MMMMMMMMMMMM
1984MMMMMMMMMMMM
1985MMMMMMMMMMMM
1986MMMMMMMMMMMM
1987MMMMMMMMMMMM
1988MMMMMMMMMMMM
1989MMMMMMMMMMMM
1990M0.020.000.210.000.000.000.000.050.000.000.00
19910.030.000.000.000.020.000.000.050.000.000.020.11
19920.070.000.000.000.010.000.000.000.000.000.000.00
19930.000.000.000.000.000.090.000.000.000.000.000.00
19940.000.000.000.000.000.000.000.000.000.000.000.00
19950.000.000.000.000.000.000.000.000.000.000.000.00
19960.000.000.000.000.000.0010.470.832.195.077.1712.71
19976.621.740.784.302.462.530.891.673.095.845.983.24
19986.013.383.580.161.291.060.080.100.712.6310.377.89
19996.467.735.391.132.181.030.870.340.341.698.364.72
20005.353.334.063.063.541.250.220.031.862.161.552.72
20011.631.392.712.701.181.760.450.940.953.078.387.52
20027.813.344.793.541.961.170.210.091.878.492.087.49
20032.000.038.9220.260.000.388.420.000.000.061.236.03
20047.160.290.000.000.0010.000.020.000.000.010.661.96
20050.000.436.922.685.171.380.510.861.733.746.195.39
200611.432.683.692.493.681.360.390.510.961.2813.467.69
20075.364.233.032.391.311.080.651.391.495.563.6711.30
200853.834.124.481.951.021.650.132.040.111.856.755.92
20098.131.093.713.073.330.760.060.261.660.424.093.24
20104.772.752.833.735.212.980.510.381.515.805.697.57
20116.544.686.144.143.141.471.260.000.912.505.572.80
20125.916.039.513.283.765.980.520.000.037.156.938.25
20133.612.062.783.425.151.040.040.368.101.473.672.69
20143.636.457.884.193.091.990.590.671.885.844.725.67
20155.084.213.911.790.790.730.180.02M2.833.855.60
20160.200.020.01MM0.020.020.551.279.877.866.12
20173.818.089.015.882.202.050.180.192.606.237.395.12
20186.664.623.734.960.151.190.110.661.973.783.686.06
20192.355.831.503.981.351.171.010.543.373.151.705.86
202010.005.022.600.431.331.790.000.050.850.596.166.26
20217.187.222.141.271.602.300.000.264.135.497.416.52
20226.393.832.206.234.382.630.280.030.352.468.536.81
20233.162.683.746.030.800.660.211.121.793.116.189.13
20248.614.303.683.142.871.850.520.750.743.807.797.15
20251.754.464.381.731.660.70MMMMMM
NCEI Climatology6.534.974.914.083.112.030.630.972.294.387.247.14

Average Wind Speed [MPH]

YearJanFebMarAprMayJunJulAugSepOctNovDec
19487.09.68.39.88.66.66.25.66.85.58.38.5
19495.68.26.16.26.46.86.45.46.38.29.110.3
195010.510.09.47.47.06.17.26.65.47.88.58.8
195110.18.07.96.56.75.65.25.66.56.78.48.7
195210.67.77.86.56.05.95.75.45.85.66.09.7
19539.06.37.45.95.94.75.44.9MMMM
1954MMMMMMMMMMMM
1955MMMMMMMMMMMM
1956MMMMMMMMMMMM
1957MMMMMMMMMMMM
1958MMMMMMMMMMMM
1959MMMMMMMMMMMM
1960MMMMMMMMMMMM
1961MMMMMMMMMMMM
1962MMMMMMMMMMMM
1963MMMMMMMMMMMM
1964MMMMMMMMMMMM
1965MMMMMMMMMMMM
1966MMMMMMMMMMMM
1967MMMMMMMMMMMM
1968MMMMMMMMMMMM
1969MMMMMMMMMMMM
1970MMMMMMMMMMMM
1971MMMMMMMMMMMM
1972MMMMMMMMMMMM
1973MMMMMMMMMMMM
1974MMMMMMMMMMMM
1975MMMMMMMMMMMM
1976MMMMMMMMMMMM
1977MMMMMMMMMMMM
1978MMMMMMMMMMMM
1979MMMMMMMMMMMM
1980MMMMMMMMMMMM
1981MMMMMMMMMMMM
1982MMMMMMMMMMMM
1983MMMMMMMMMMMM
1984MMMMMMMMMMMM
1985MMMMMMMMMMMM
1986MMMMMMMMMMMM
1987MMMMMMMMMMMM
1988MMMMMMMMMMMM
1989MMMMMMMMMMMM
1990M7.55.44.15.66.23.44.44.05.07.98.0
19915.15.35.26.75.56.03.95.62.73.76.16.5
19927.94.83.45.85.17.15.85.45.04.94.85.9
19935.24.45.66.34.95.34.74.94.13.44.56.6
19945.36.55.85.15.55.46.43.13.33.76.77.6
19956.04.95.74.75.45.25.65.04.03.86.06.3
19966.95.74.65.94.75.46.35.14.24.45.37.4
19976.04.46.44.84.64.85.44.74.85.54.75.6
19987.27.14.83.74.45.95.45.74.84.27.37.4
19996.710.16.45.25.84.35.65.04.94.45.26.5
20005.74.44.74.64.75.95.65.63.53.93.34.9
20014.43.64.44.65.25.06.25.44.84.05.46.0
20026.34.95.35.44.45.25.95.94.23.24.15.4
20035.04.45.85.54.25.75.65.04.64.94.85.3
20045.54.45.14.64.05.25.85.54.34.04.25.0
20055.12.95.04.74.64.95.85.74.13.75.05.3
20067.34.26.04.74.55.05.95.74.23.07.05.6
20074.85.24.94.15.24.65.44.64.44.84.57.0
20086.34.55.14.54.95.35.44.24.13.45.16.3
20094.53.85.04.45.24.25.24.03.74.27.44.1
20105.44.25.65.54.24.35.24.34.04.16.66.9
20116.56.97.86.15.25.24.34.04.14.04.94.6
20125.85.46.24.24.03.13.84.13.74.75.96.9
20135.04.93.74.43.62.34.22.44.03.34.33.7
20144.35.25.54.33.43.63.83.43.44.85.45.1
20154.54.33.94.35.05.65.04.8M4.15.15.4
20165.45.06.43.74.65.25.34.94.16.45.65.4
20175.25.36.55.44.84.85.65.13.73.76.65.1
20186.45.04.05.34.94.75.44.43.93.84.85.8
20194.74.93.04.54.35.04.03.83.43.53.14.7
20207.84.03.93.83.94.34.44.33.43.45.76.0
20215.65.74.23.74.23.84.63.83.65.26.06.3
20225.74.14.74.54.84.65.25.04.13.94.66.3
20234.85.35.35.35.05.85.55.04.23.74.25.0
20246.44.85.25.05.05.35.64.64.24.05.66.0
20253.45.15.14.64.45.56.2MMMMM
NCEI ClimatologyMMMMMMMMMMMM

Average Daily High Temperature [F]

YearJanFebMarAprMayJunJulAugSepOctNovDec
194844.9746.3851.3954.7063.8774.3074.0070.4569.9761.5548.8041.87
194935.5245.6154.0662.5069.0671.0075.1375.6174.7758.7757.8344.71
195033.2345.6150.1657.2763.9470.1075.4278.2372.5057.9451.0049.90
195143.7449.5048.3265.5366.2973.6075.2376.4573.9060.7150.4742.48
195240.6547.4850.0662.0765.8766.4076.0675.2975.8368.3249.1347.03
1953M50.4652.6757.6363.6364.4175.5974.30MMMM
1954MMMMMMMMMMMM
1955MMMMMMMMMMMM
1956MMMMMMMMMMMM
1957MMMMMMMMMMMM
1958MMMMMMMMMMMM
1959MMMMMMMMMMMM
1960MMMMMMMMMMMM
1961MMMMMMMMMMMM
1962MMMMMMMMMMMM
1963MMMMMMMMMMMM
1964MMMMMMMMMMMM
1965MMMMMMMMMMMM
1966MMMMMMMMMMMM
1967MMMMMMMMMMMM
1968MMMMMMMMMMMM
1969MMMMMMMMMMMM
1970MMMMMMMMMMMM
1971MMMMMMMMMMMM
1972MMMMMMMMMMMM
1973MMMMMMMMMMMM
1974MMMMMMMMMMMM
1975MMMMMMMMMMMM
1976MMMMMMMMMMMM
1977MMMMMMMMMMMM
1978MMMMMMMMMMMM
1979MMMMMMMMMMMM
1980MMMMMMMMMMMM
1981MMMMMMMMMMMM
1982MMMMMMMMMMMM
1983MMMMMMMMMMMM
1984MMMMMMMMMMMM
1985MMMMMMMMMMMM
1986MMMMMMMMMMMM
1987MMMMMMMMMMMM
1988MMMMMMMMMMMM
1989MMMMMMMMMMMM
1990M43.7852.0757.3658.3565.4166.2970.1467.0559.4152.5741.28
199143.4350.4051.8756.5060.8367.4769.4070.5262.8853.7352.6446.61
199247.6350.7753.6759.4565.7073.3777.7778.8770.6362.6850.3342.77
199341.8449.5756.0057.1068.6868.8068.5575.9774.9763.2946.2544.81
199448.6845.7158.3559.7367.3568.8778.4272.1975.1360.8746.2745.97
199549.9753.2156.1958.7369.0071.7376.2674.2373.5257.5754.2045.97
199644.3249.6854.5858.9359.8168.1578.9477.1067.6359.8149.8345.39
199744.5549.6853.0358.3769.4568.5075.1378.3073.0358.7155.5745.03
199847.1351.5755.5860.3360.6868.6777.2678.5275.8360.5251.7044.16
199945.9048.6051.4258.7061.4265.5072.9773.4874.2062.3953.5746.34
200044.3149.6651.9061.6863.3971.5774.4874.0670.8360.7148.8345.01
200147.1750.2255.2456.5568.2467.2772.5476.0672.0259.3953.1146.05
200244.8750.2650.0459.1563.2371.7777.2277.0373.5462.2554.3748.56
200351.5850.9254.3057.7865.0574.0879.5078.2674.4563.5750.0146.81
200443.9351.8258.2665.3365.4274.3182.5579.1768.7762.4650.7647.38
200548.4354.1759.6559.7267.7368.9178.3879.5870.7361.0349.5545.30
200649.0748.8453.3761.2867.8872.3878.2277.6474.7261.3850.0644.83
200742.4750.1456.0658.8966.8169.7777.7276.0069.0859.2051.4744.10
200843.4451.6150.9955.5265.6267.8276.6576.1973.8861.1553.7241.29
200944.5449.6150.3560.2668.3572.6282.2376.7774.2460.3452.1042.34
201050.9354.1156.6758.1062.3167.2074.3375.9068.6962.2549.8248.14
201146.1145.5651.6854.4460.8067.0473.8176.5975.9259.5849.5844.02
201245.4749.1350.5259.7264.9866.2673.8179.4575.3862.0252.6445.59
201341.8749.6156.1059.1867.5973.4077.4176.1969.2060.0551.4440.54
201447.6846.0156.8562.0669.2271.0078.9281.3576.4665.3950.0649.36
201549.1956.2462.0862.0068.0078.8681.8281.82M66.3746.9947.86
201647.8454.8457.0867.2271.9572.3277.4880.9571.8660.7956.7141.25
201740.9747.7353.2258.2568.3572.6479.6482.7776.6762.8551.9144.83
201850.2446.6354.2760.1170.4072.4881.7379.4472.2962.7653.2747.61
201949.0742.2857.1560.0769.3071.7576.0978.8169.2359.5753.0647.25
202049.1750.5553.7563.2568.2770.8877.3980.3075.6163.1651.4648.19
202149.3545.4655.0065.7367.6578.3780.0978.8374.0459.9653.9343.71
202247.3649.7056.2355.8262.3870.6880.9782.9277.8468.7149.4843.94
202348.3846.9852.2257.6672.2173.5982.0082.3973.6763.9752.3749.64
202445.5551.5455.9461.1365.9272.6383.0478.8774.6464.5752.1548.66
202546.6948.2656.4864.7768.4274.0079.89MMMMM
NCEI Climatology47.7052.0856.9062.1068.7972.8979.3180.4175.6964.0053.0046.60

Average Daily Low Temperature [F]

YearJanFebMarAprMayJunJulAugSepOctNovDec
194832.1932.7234.7139.7744.0054.3051.7153.7146.1039.9435.5732.10
194919.6131.4636.6139.5044.9745.9050.3250.2648.5337.3241.6034.52
195021.4833.5737.2937.1741.0354.6356.0355.6850.0045.5841.4743.10
195134.6536.3634.0338.8045.1053.6356.0050.6849.9044.6538.9033.13
195233.1636.1436.9038.3343.9052.5356.1054.1648.6044.1032.9736.68
1953M36.0839.0440.6745.0451.2656.6757.11MMMM
1954MMMMMMMMMMMM
1955MMMMMMMMMMMM
1956MMMMMMMMMMMM
1957MMMMMMMMMMMM
1958MMMMMMMMMMMM
1959MMMMMMMMMMMM
1960MMMMMMMMMMMM
1961MMMMMMMMMMMM
1962MMMMMMMMMMMM
1963MMMMMMMMMMMM
1964MMMMMMMMMMMM
1965MMMMMMMMMMMM
1966MMMMMMMMMMMM
1967MMMMMMMMMMMM
1968MMMMMMMMMMMM
1969MMMMMMMMMMMM
1970MMMMMMMMMMMM
1971MMMMMMMMMMMM
1972MMMMMMMMMMMM
1973MMMMMMMMMMMM
1974MMMMMMMMMMMM
1975MMMMMMMMMMMM
1976MMMMMMMMMMMM
1977MMMMMMMMMMMM
1978MMMMMMMMMMMM
1979MMMMMMMMMMMM
1980MMMMMMMMMMMM
1981MMMMMMMMMMMM
1982MMMMMMMMMMMM
1983MMMMMMMMMMMM
1984MMMMMMMMMMMM
1985MMMMMMMMMMMM
1986MMMMMMMMMMMM
1987MMMMMMMMMMMM
1988MMMMMMMMMMMM
1989MMMMMMMMMMMM
1990M34.5041.8946.4446.9653.8655.9557.7558.7146.3843.0332.86
199135.6343.7239.6344.4349.4051.9358.2857.7753.1243.9644.0440.71
199240.3341.0442.5245.9353.7856.6056.1054.1948.4345.9738.7033.87
199329.3229.3238.1043.6349.8451.5353.8453.5848.5744.8732.1135.29
199438.5833.3938.9743.7046.1648.9053.1653.2652.4040.0636.4335.71
199536.6837.8236.4840.1747.2950.2055.0352.1656.9049.7043.2336.10
199636.8433.2538.1644.2345.3949.5654.6152.9447.0042.0638.6736.52
199734.7434.5438.5239.7748.1350.9053.7457.0352.7044.7140.5334.48
199838.7139.2539.4840.4348.1052.7758.2954.2650.8043.6143.1734.94
199937.2938.1637.2937.7743.4250.2752.0356.6147.2741.8142.7737.31
200034.0036.0336.7442.0747.1650.3754.7752.4549.3743.2334.0734.45
200134.2530.2137.2339.3343.9047.7753.3354.6349.5542.1441.0335.90
200236.8134.6435.0841.4443.5250.6254.3052.6947.9641.1338.3536.94
200338.9935.4641.3042.4945.4251.3953.6654.4351.5248.2836.0537.11
200436.2437.2039.6541.1749.5553.9762.4759.6351.7547.2238.0737.25
200535.7829.6539.5542.5550.0351.9054.4954.8746.7347.5436.8534.32
200640.8831.6137.9240.1645.3052.4054.9953.6049.1042.1040.5834.15
200730.4938.4442.3042.2345.1950.6757.4255.3550.9144.7438.5637.65
200832.0635.7935.9537.7048.0348.6853.1955.1749.1043.0342.6833.74
200932.5830.6535.5438.5444.4352.2856.2155.5750.1844.0240.6427.47
201040.0736.8938.1341.1244.4849.7354.0153.6653.6744.2538.6037.40
201135.6633.2239.6138.6643.7350.7253.4855.2352.5846.6336.7432.46
201233.9735.4136.9942.0844.8350.0054.9455.8349.3445.1241.4238.50
201333.2237.4039.1442.3247.9753.5354.7057.7254.5342.1637.1032.17
201435.3133.4840.0742.5048.7851.9856.5457.8453.2451.1040.0438.04
201537.4639.8440.1339.8049.4253.3057.7856.34M49.8335.4541.74
201637.8840.6341.1744.3049.0152.8257.0855.6050.2849.1345.4232.12
201727.9835.1241.1542.8147.3252.3653.0256.8052.1942.2240.9932.13
201840.1835.1436.0842.4249.4651.3456.0256.6750.6244.7439.6136.32
201937.6833.6134.3644.3849.6852.2257.0057.6754.8539.2037.1338.31
202041.3934.7435.5541.1948.2952.3855.1254.7755.2746.0439.2437.06
202139.0736.0634.7939.1346.6254.1756.3856.5051.0844.8343.5735.42
202235.1535.4040.0938.6945.1252.1457.1058.1652.7347.9932.4734.02
202337.3132.8835.9641.4649.0350.3854.8358.3550.9845.9037.7439.20
202435.4838.3138.5541.3845.9050.3656.4155.8153.5644.6341.1138.50
202531.3934.9641.1240.9546.0352.0355.73MMMMM
NCEI Climatology35.1034.7337.5040.4045.2949.5053.4053.2949.6044.1038.6034.80

Average Daily Temperature (high+low)/2 [F]

YearJanFebMarAprMayJunJulAugSepOctNovDec
194838.5839.5543.0547.2353.9464.3062.8562.0858.0350.7442.1836.98
194927.5638.5445.3451.0057.0258.4562.7362.9461.6548.0549.7239.61
195027.3539.5943.7347.2252.4862.3765.7366.9561.2551.7646.2346.50
195139.1942.9341.1852.1755.6963.6265.6163.5661.9052.6844.6837.81
195236.9041.8143.4850.2054.8959.4766.0864.7362.2256.2141.0541.85
1953M43.2745.8549.1554.3357.8366.1365.70MMMM
1954MMMMMMMMMMMM
1955MMMMMMMMMMMM
1956MMMMMMMMMMMM
1957MMMMMMMMMMMM
1958MMMMMMMMMMMM
1959MMMMMMMMMMMM
1960MMMMMMMMMMMM
1961MMMMMMMMMMMM
1962MMMMMMMMMMMM
1963MMMMMMMMMMMM
1964MMMMMMMMMMMM
1965MMMMMMMMMMMM
1966MMMMMMMMMMMM
1967MMMMMMMMMMMM
1968MMMMMMMMMMMM
1969MMMMMMMMMMMM
1970MMMMMMMMMMMM
1971MMMMMMMMMMMM
1972MMMMMMMMMMMM
1973MMMMMMMMMMMM
1974MMMMMMMMMMMM
1975MMMMMMMMMMMM
1976MMMMMMMMMMMM
1977MMMMMMMMMMMM
1978MMMMMMMMMMMM
1979MMMMMMMMMMMM
1980MMMMMMMMMMMM
1981MMMMMMMMMMMM
1982MMMMMMMMMMMM
1983MMMMMMMMMMMM
1984MMMMMMMMMMMM
1985MMMMMMMMMMMM
1986MMMMMMMMMMMM
1987MMMMMMMMMMMM
1988MMMMMMMMMMMM
1989MMMMMMMMMMMM
1990M39.1446.9851.9052.6559.6461.1263.9562.8852.9047.8037.07
199139.5347.0645.7550.4755.1259.7063.8464.1558.0048.8548.3443.66
199243.9845.9048.0952.6959.7464.9866.9466.5359.5354.3244.5238.32
199335.5839.4547.0550.3759.2660.1761.1964.7761.7754.0839.1840.05
199443.6339.5548.6651.7256.7658.8865.7962.7363.7750.4741.3540.84
199543.3245.5246.3449.4558.1560.9765.6563.1965.2153.6348.7241.03
199640.5841.4646.3751.5852.6058.8566.7765.0257.3250.9444.2540.95
199739.6542.1145.7749.0758.7959.7064.4467.6762.8751.7148.0539.76
199842.9245.4147.5350.3854.3960.7267.7766.3963.3252.0647.4339.55
199941.6043.3844.3548.2352.4257.8862.5065.0560.7352.1048.1741.83
200039.1542.8544.3251.8755.2760.9764.6363.2660.1051.9741.4539.73
200140.7140.2146.2347.9456.0757.5262.9365.3460.7850.7747.0740.98
200240.8442.4542.5650.2953.3861.1965.7664.8660.7551.6946.3642.75
200345.2843.1947.8050.1455.2362.7366.5866.3462.9955.9243.0341.96
200440.0944.5148.9553.2557.4864.1472.5169.4060.2654.8444.4242.31
200542.1141.9149.6051.1458.8860.4166.4467.2358.7354.2943.2039.81
200644.9840.2345.6550.7256.5962.3966.6165.6261.9151.7445.3239.49
200736.4844.2949.1850.5656.0060.2267.5765.6859.9951.9745.0240.87
200837.7543.7043.4746.6156.8258.2564.9265.6861.4952.0948.2037.52
200938.5640.1342.9549.4056.3962.4569.2266.1762.2152.1846.3734.90
201045.5045.5047.4049.6153.4058.4764.1764.7861.1853.2544.2142.77
201140.8839.3945.6546.5552.2658.8863.6565.9164.2553.1143.1638.24
201239.7242.2743.7650.9054.9158.1364.3767.6462.3653.5747.0342.05
201337.5543.5147.6250.7557.7863.4666.0566.9561.8751.1044.2736.35
201441.4939.7548.4652.2859.0061.4967.7369.6064.8558.2545.0543.70
201543.3248.0451.1050.9058.7166.0869.8069.08M58.1041.2244.80
201642.8647.7349.1355.7660.4862.5767.2868.2761.0754.9651.0736.69
201734.4841.4347.1950.5357.8362.5066.3369.7964.4352.5446.4538.48
201845.2140.8945.1751.2759.9361.9168.8768.0561.4553.7546.4441.96
201943.3737.9445.7552.2259.4961.9966.5568.2462.0449.3845.1042.78
202045.2842.6444.6552.2258.2861.6366.2667.5465.4454.6045.3542.63
202144.2140.7644.9052.4357.1466.2768.2467.6762.5652.3948.7539.57
202241.2542.5548.1647.2653.7561.4169.0370.5465.2958.3540.9838.98
202342.8539.9344.0949.5660.6261.9868.4170.3762.3254.9445.0544.42
202440.5244.9347.2551.2655.9161.5069.7267.3464.1054.6046.6343.58
202539.0441.6148.8052.8657.2263.0267.81MMMMM
NCEI Climatology41.4043.4047.2051.2557.0461.1966.3666.8562.6554.0545.8040.70

Average Relative Humidity [%]

This value is computed via a simple average of available observations weighted by the duration between observations.

YearJanFebMarAprMayJunJulAugSepOctNovDec
194885.2%82.3%78.8%79.7%77.5%72.0%75.1%80.9%80.1%84.4%86.4%86.6%
194983.4%87.0%81.2%73.0%73.8%70.7%70.5%73.5%74.8%82.7%85.0%87.2%
195087.1%84.5%82.2%74.5%69.7%72.8%70.6%73.4%74.5%85.1%85.8%88.6%
195181.4%81.3%80.1%64.7%73.6%62.9%77.5%73.1%77.5%86.8%87.5%87.4%
195288.9%85.0%81.4%72.5%75.8%79.3%76.9%77.0%75.5%81.9%85.9%87.6%
195392.5%84.7%81.4%80.4%77.9%82.5%77.0%82.0%MMMM
1954MMMMMMMMMMMM
1955MMMMMMMMMMMM
1956MMMMMMMMMMMM
1957MMMMMMMMMMMM
1958MMMMMMMMMMMM
1959MMMMMMMMMMMM
1960MMMMMMMMMMMM
1961MMMMMMMMMMMM
1962MMMMMMMMMMMM
1963MMMMMMMMMMMM
1964MMMMMMMMMMMM
1965MMMMMMMMMMMM
1966MMMMMMMMMMMM
1967MMMMMMMMMMMM
1968MMMMMMMMMMMM
1969MMMMMMMMMMMM
1970MMMMMMMMMMMM
1971MMMMMMMMMMMM
1972MMMMMMMMMMMM
1973MMMMMMMMMMMM
1974MMMMMMMMMMMM
1975MMMMMMMMMMMM
1976MMMMMMMMMMMM
1977MMMMMMMMMMMM
1978MMMMMMMMMMMM
1979MMMMMMMMMMMM
1980MMMMMMMMMMMM
1981MMMMMMMMMMMM
1982MMMMMMMMMMMM
1983MMMMMMMMMMMM
1984MMMMMMMMMMMM
1985MMMMMMMMMMMM
1986MMMMMMMMMMMM
1987MMMMMMMMMMMM
1988MMMMMMMMMMMM
1989MMMMMMMMMMMM
1990M81.8%81.9%78.6%77.5%74.3%78.3%75.1%76.5%92.4%91.5%81.4%
199189.6%85.0%77.2%73.0%73.3%70.5%72.1%76.3%80.7%82.1%89.0%92.5%
199284.8%80.7%76.6%71.8%58.6%61.9%64.1%61.5%67.0%72.3%78.0%78.0%
199375.8%63.2%68.3%71.1%66.9%68.5%69.0%66.2%67.0%77.3%80.5%81.1%
199483.7%79.3%68.4%70.1%65.3%67.1%63.0%60.6%33.2%58.2%84.0%80.1%
199575.9%77.6%70.0%71.6%68.2%67.7%66.3%68.3%71.2%69.2%78.7%75.1%
199676.5%71.4%72.3%72.7%73.2%67.8%65.2%67.6%76.8%81.6%85.2%84.5%
199782.2%78.5%77.2%73.1%69.4%72.1%69.2%69.6%76.1%82.2%82.4%84.1%
199882.5%77.4%76.4%71.0%77.3%73.1%71.1%66.4%68.5%79.2%81.8%81.6%
199984.4%77.4%74.7%67.0%68.8%71.3%69.8%71.3%65.0%73.9%81.6%81.7%
200082.8%80.2%74.7%79.4%79.1%74.3%74.0%74.1%77.5%83.6%86.6%88.4%
200185.7%82.0%80.2%78.9%68.4%72.5%72.5%75.6%77.1%85.1%87.6%88.7%
200290.6%82.9%80.0%74.5%73.4%73.8%69.8%70.8%73.9%79.9%85.1%86.1%
200388.6%82.9%83.2%78.3%73.7%67.7%67.7%70.6%73.9%82.7%83.8%87.2%
200488.9%81.8%77.2%70.2%74.8%66.8%59.5%74.0%81.0%85.7%88.9%87.9%
200586.0%80.1%77.0%79.1%77.0%74.0%69.2%70.6%74.2%86.7%88.5%86.5%
200687.2%76.3%75.9%73.0%69.9%70.9%68.4%69.1%73.2%80.5%85.9%85.5%
200787.2%86.5%79.1%74.7%71.0%71.4%72.2%72.1%74.6%83.6%85.6%88.6%
200885.6%82.6%80.3%75.3%71.9%70.6%66.4%74.2%73.0%81.4%87.3%85.4%
200985.6%80.8%78.9%71.0%69.1%70.8%66.6%71.0%74.5%79.4%81.9%83.1%
201083.7%82.3%73.2%73.4%75.8%75.3%70.7%71.6%78.7%80.4%84.6%82.8%
201184.3%80.3%81.3%75.2%73.1%73.0%71.9%68.0%70.3%81.8%84.6%86.3%
201285.4%80.6%78.7%73.8%68.2%73.7%71.3%68.7%66.4%75.0%81.5%82.7%
201382.8%79.3%75.0%70.4%68.6%67.8%64.6%70.0%78.6%78.5%79.0%82.3%
201480.1%76.2%74.6%69.7%66.3%67.0%65.6%64.9%65.5%77.4%75.7%79.2%
201582.4%77.4%71.4%67.6%67.8%61.6%60.0%59.6%M77.2%80.7%81.4%
201680.6%78.4%72.0%65.8%62.8%64.5%69.5%68.4%76.1%85.8%87.1%90.3%
201785.0%84.4%84.3%77.9%74.9%72.5%67.7%68.1%72.8%83.4%88.8%88.1%
201887.0%85.8%80.3%76.6%72.0%69.8%67.5%73.1%76.1%84.2%87.2%87.3%
201987.2%85.1%72.8%75.9%73.5%70.0%72.1%72.0%81.3%80.4%86.6%90.3%
202087.4%86.6%80.2%70.9%74.0%75.5%71.1%68.3%75.8%83.3%89.0%88.0%
202186.8%87.8%78.3%66.0%72.4%71.1%69.5%71.2%73.4%83.7%87.3%88.7%
202286.8%83.9%80.2%77.5%76.3%74.0%70.1%68.8%70.2%80.7%83.4%88.4%
202385.2%82.5%79.2%77.4%69.6%67.7%64.8%67.2%74.1%83.5%87.0%89.4%
202487.4%83.2%79.3%72.4%72.4%68.9%67.0%71.8%76.4%81.4%86.4%87.5%
202585.4%83.5%81.5%68.8%68.3%68.1%66.9%MMMMM

Monthly Plots

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Monthly Plot
Monthly Plot