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Annual Climatological Summary for 2024
Name: OFallon Weather City: OFallon State: MO
Elevation: 532 ft Lat: N 38° 50' 20" Lon: W 090° 43' 42"
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
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24 1 35.7 21.6 28.9 0.0 1119 0 56.3 29 -9.5 14 0 7 22 5
24 2 57.2 31.1 44.4 0.0 610 14 82.6 27 11.6 17 0 1 15 0
24 3 63.1 39.7 51.0 0.0 460 29 79.7 31 24.9 18 0 0 7 0
24 4 69.8 48.3 59.0 0.0 256 75 87.6 14 32.4 21 0 0 0 0
24 5 79.4 59.0 69.0 0.0 48 171 90.0 19 50.7 5 1 0 0 0
24 6 88.4 66.5 77.5 0.0 9 385 101.0 25 52.2 11 12 0 0 0
24 7 86.5 66.8 76.3 0.0 5 299 95.7 15 58.0 1 6 0 0 0
24 8
24 9
24 10
24 11
24 12
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68.2 47.2 57.6 0.0 2506 972 101.0 Jun -9.5 Jan 19 8 44 5
Precipitation (in)
Dep. Max Days of Rain
From Obs. >=
YR MO Total Norm Day Date 0.01 0.10 1.00
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24 1 4.16 0.0 0.81 25 14 9 0
24 2 0.30 0.0 0.25 18 2 1 0
24 3 3.51 0.0 1.40 25 9 5 2
24 4 5.41 0.0 1.32 1 13 8 2
24 5 7.57 0.0 2.38 26 15 10 2
24 6 1.81 0.0 0.82 26 10 5 0
24 7 8.19 0.0 2.52 3 8 6 4
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30.95 0.0 2.52 Jul 71 44 10
Wind Speed (mph)
Dom
YR MO Avg. Hi Date Dir
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24 1 4.5 37.0 12 W
24 2 4.3 35.0 27 WSW
24 3 5.3 42.0 14 SW
24 4 5.0 37.0 17 SW
24 5 3.2 37.0 21 SW
24 6 3.5 28.0 18 SW
24 7 2.6 33.0 16 SW
24 8
24 9
24 10
24 11
24 12
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4.1 42.0 Mar SW