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Report for 2019
 Annual Climatological Summary for 2019 Name: ofallonweather.com City: O'Fallon State: MO Elevation: 550 ft Lat: N 38° 50' 20" Lon: W 090° 43' 43" Temperature (°F), Heat Base: 65.0 Cool Base: 65.0 Dep. Heat Cool Max Max Min Min Mean Mean From Deg Deg >= <= <= <= YR MO Max Min Mean Norm Days Days Hi Date Low Date 90.0 32.0 32.0 0.0 ------------------------------------------------------------------------------------ 19 1 37.6 23.0 30.2 -1.1 1078 0 67.8 7 -6.2 30 0 8 24 1 19 2 41.6 25.8 33.8 -1.0 875 0 68.6 3 11.1 8 0 6 24 0 19 3 50.6 33.4 41.6 -3.1 725 0 69.6 13 1.5 4 0 3 11 0 19 4 68.4 47.8 57.8 1.4 274 57 86.9 22 30.8 1 0 0 2 0 19 5 75.2 57.5 66.3 0.1 121 162 89.6 16 43.1 13 0 0 0 0 19 6 82.0 65.1 73.0 -2.3 13 253 92.1 30 54.5 13 4 0 0 0 19 7 87.6 70.4 78.8 -0.8 0 428 93.7 19 62.1 23 10 0 0 0 19 8 84.3 67.7 75.8 -2.0 1 335 94.1 19 60.2 24 2 0 0 0 19 9 85.7 66.6 75.9 5.6 8 336 93.0 16 56.2 24 11 0 0 0 19 10 65.0 46.5 55.0 -3.7 360 51 91.3 1 29.3 31 2 0 1 0 19 11 53.2 34.2 43.3 -2.1 217 0 62.8 10 20.4 8 0 0 4 0 19 12 ------------------------------------------------------------------------------------ 66.5 48.9 57.4 -0.8 3678 1627 94.1 Aug -6.2 Jan 29 17 66 1 Precipitation (in) Dep. Max Days of Rain From Obs. >= YR MO Total Norm Day Date 0.01 0.10 1.00 --------------------------------------------- 19 1 2.39 0.19 0.53 22 11 9 0 19 2 2.81 0.55 0.86 7 10 5 0 19 3 6.59 3.24 1.72 9 11 6 4 19 4 6.11 2.26 2.83 30 13 7 2 19 5 7.50 3.28 2.79 21 15 9 3 19 6 5.98 1.74 1.92 21 15 9 2 19 7 5.91 2.43 1.65 5 8 7 2 19 8 6.76 3.75 2.15 26 12 9 2 19 9 1.11 -2.04 0.87 8 6 2 0 19 10 4.91 2.13 1.42 10 10 6 2 19 11 0.01 -2.92 0.01 5 1 0 0 19 12 --------------------------------------------- 50.08 14.61 2.83 Apr 112 69 17 Wind Speed (mph) Dom YR MO Avg. Hi Date Dir ------------------------------ 19 1 2.0 35.0 28 WNW 19 2 1.6 42.0 23 WNW 19 3 1.8 54.0 14 W 19 4 1.5 32.0 14 SW 19 5 0.7 33.0 18 SSW 19 6 0.4 38.0 28 W 19 7 0.1 33.0 17 SSW 19 8 1.8 32.0 13 WSW 19 9 3.0 25.0 8 SSW 19 10 3.4 32.0 21 W 19 11 3.2 20.0 2 WSW 19 12 ------------------------------ 1.8 54.0 Mar WSW
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