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Report for 2018
Annual Climatological Summary for 2018
Name: Riverweather.com City: St. Charles County State: MO
Elevation: 430 ft Lat: N 38° 55' 52" Lon: W 090° 28' 28"
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
------------------------------------------------------------------------------------
18 1 39.1 20.1 30.1 -1.1 1083 0 70.5 21 -4.7 1 0 12 23 2
18 2 47.0 28.9 37.4 2.6 776 4 76.6 15 7.4 5 0 5 14 0
18 3 50.1 35.6 42.8 -1.9 584 0 68.2 15 0.0 7 0 0 4 1
18 4 60.5 40.7 50.1 -6.3 472 24 87.2 12 24.8 2 0 0 8 0
18 5 85.2 65.2 74.7 8.6 11 312 94.9 27 52.7 1 7 0 0 0
18 6 88.3 69.6 78.3 3.0 0 358 96.3 1 62.6 5 14 0 0 0
18 7 87.4 70.2 78.2 -1.4 0 409 97.2 14 62.5 7 13 0 0 0
18 8 87.8 69.2 77.6 -0.2 2 392 98.0 6 56.4 23 12 0 0 0
18 9 83.9 64.8 73.3 3.1 31 282 94.7 18 52.6 28 11 0 0 0
18 10 68.7 50.3 58.6 -0.1 294 97 89.4 3 34.9 21 0 0 0 0
18 11 45.3 32.3 38.5 -6.9 794 0 62.5 22 18.6 27 0 3 15 0
18 12 46.6 31.9 38.3 3.4 828 0 65.5 1 19.9 9 0 3 16 0
------------------------------------------------------------------------------------
65.8 48.2 56.5 0.2 4879 1881 98.0 Aug -4.7 Jan 57 23 80 3
Precipitation (in)
Dep. Max Days of Rain
From Obs. >=
YR MO Total Norm Day Date 0.01 0.10 1.00
---------------------------------------------
18 1 1.18 -1.18 0.64 22 6 2 0
18 2 3.99 1.78 1.34 20 11 7 2
18 3 5.88 3.60 1.47 19 13 11 2
18 4 1.87 -1.49 0.94 13 7 4 0
18 5 4.74 0.90 1.27 3 9 9 1
18 6 3.48 -0.74 1.53 26 7 5 2
18 7 1.28 -2.89 0.65 1 9 4 0
18 8 4.82 1.35 1.47 24 10 7 2
18 9 1.45 -1.53 0.48 26 6 4 0
18 10 3.43 0.28 0.81 7 12 10 0
18 11 3.10 0.30 1.02 1 14 9 1
18 12 3.96 1.06 1.62 31 14 6 1
---------------------------------------------
39.18 1.44 1.62 Dec 118 78 11
Wind Speed (mph)
Dom
YR MO Avg. Hi Date Dir
------------------------------
18 1 3.5 33.0 11 WNW
18 2 3.7 36.0 24 NW
18 3 4.4 30.0 1 NNW
18 4 4.5 40.0 3 NW
18 5 1.4 57.0 14 WSW
18 6 1.5 40.0 14 W
18 7 1.7 46.0 1 NNW
18 8 1.1 36.0 7 W
18 9 1.4 26.0 8 N
18 10 2.2 37.0 20 WNW
18 11 3.0 39.0 26 NW
18 12 3.0 32.0 31 WNW
------------------------------
2.6 57.0 May NW