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Report for 2021
 Annual Climatological Summary for 2021 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 ------------------------------------------------------------------------------------ 21 1 39.2 28.5 33.6 2.3 966 0 54.0 21 11.9 28 0 5 22 0 21 2 33.2 17.7 25.7 -9.1 1096 0 67.7 23 -4.2 16 0 14 23 4 21 3 60.0 41.7 50.5 5.8 456 9 78.6 27 28.4 2 0 0 4 0 21 4 65.8 46.3 55.9 -0.5 323 51 84.6 26 27.8 1 0 0 4 0 21 5 72.4 54.3 63.3 -2.9 163 112 87.1 26 38.0 10 0 0 0 0 21 6 85.9 67.2 76.3 1.0 8 344 97.9 18 53.1 22 8 0 0 0 21 7 86.2 68.5 77.1 -2.5 0 377 95.5 29 60.5 2 7 0 0 0 21 8 82.2 61.9 71.5 -6.3 1 21 84.4 1 61.1 3 0 0 0 0 21 9 21 10 21 11 21 12 ------------------------------------------------------------------------------------ 65.6 48.3 56.8 -1.5 3019 916 97.9 Jun -4.2 Feb 15 19 53 4 Precipitation (in) Dep. Max Days of Rain From Obs. >= YR MO Total Norm Day Date 0.01 0.10 1.00 --------------------------------------------- 21 1 3.12 0.92 1.30 30 13 5 1 21 2 1.76 -0.50 1.20 28 5 3 1 21 3 2.15 -1.20 1.05 18 7 4 1 21 4 4.73 0.88 1.28 7 11 6 3 21 5 4.06 -0.16 1.37 27 12 8 1 21 6 8.36 4.12 4.19 25 12 6 3 21 7 6.39 2.91 2.19 10 8 8 2 21 8 0.00 -3.01 0.00 0 0 0 0 21 9 21 10 21 11 21 12 --------------------------------------------- 30.57 3.96 4.19 Jun 68 40 12 Wind Speed (mph) Dom YR MO Avg. Hi Date Dir ------------------------------ 21 1 4.1 27.0 14 W 21 2 4.5 31.0 4 NNW 21 3 4.8 34.0 10 S 21 4 4.1 34.0 10 WSW 21 5 3.3 33.0 9 SSW 21 6 2.5 28.0 19 SW 21 7 2.1 36.0 15 WSW 21 8 2.0 13.0 1 NE 21 9 21 10 21 11 21 12 ------------------------------ 3.4 36.0 Jul WSW
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