Updated: February 17, 2018 4:25 pm
Next update: February 18, 2018 5:25 am

WXSIM Forecast for: O'Fallon

Tonight


Saturday


Saturday
night


Sunday


Sunday
night


Monday


Monday
night


50% Tuesday


Tuesday
night











3
6
3
12
10
16
13
10
11

Temperature/Precipitation/PressureThunder/Dewpoint/Pressure UV/Solar radiation Wind Max/min temperature
  Conditions Temperature Wind Precipitation UV Index Description and notes
Tonight
3
  Partly cloudy in the evening, becoming mostly cloudy after midnight.
Saturday
6
<0.1 in
PoP: 30%
Cloudy. A slight chance of a mix of snow, rain, and sleet in the morning, then a slight chance of rain in the afternoon. Precipitation (liquid equivalent) less than a tenth of an inch.
No snow or ice (on ground) accumulation expected.
Saturday night
3
  Partly cloudy in the evening, becoming clear after midnight.
Sunday
12
  Sunny in the morning, becoming partly to mostly cloudy in the afternoon. Mild.
Sunday night
10
<0.25 in
PoP: 60%
Mostly cloudy to cloudy in the evening, becoming dense overcast after midnight. A slight chance of rain in the evening, then a chance of rain after midnight. Relatively mild. Precipitation less than a quarter of an inch.
Monday
16
<0.1 in
PoP: 30%
Cloudy in the morning, becoming mostly cloudy to cloudy in the afternoon. A chance of rain. Precipitation showery or intermittent. Windy and unusually warm. Precipitation less than a tenth of an inch.
Monday night
13
<0.25 in
PoP: 60%
Cloudy in the evening, becoming dense overcast after midnight. Rain likely.
Scattered thundershowers possible. Breezy and unusually mild. Precipitation less than a quarter of an inch.
Tuesday
10
0.1 in
PoP: 50%
Dense overcast. A chance of rain in the morning, then a slight chance of rain in the afternoon.
Scattered thundershowers possible. Unusually mild. Precipitation mostly around a tenth of an inch.
Tuesday night
11
  Dense overcast in the evening, becoming mostly cloudy after midnight. Breezy. Wind chill ranging from 19 to 34.
Wednesday
9
  Partly to mostly cloudy.
Wednesday night
6
  Partly to mostly cloudy in the evening, becoming mostly cloudy after midnight.
Thursday
7
  Partly to mostly cloudy in the morning, becoming mostly cloudy in the afternoon. Relatively mild.
Thursday night
4
  Partly to mostly cloudy.
Move the mouse over the values for info.
  Conditions Temperature Wind Precipitation Pressure UV Index Description and notes
 06:50     17:42    Daylength: 10:51 Friday 16 Feb
18:00
5
  30.11 in   Mostly cloudy.
21:00
3
  30.16 in   Clear.
 06:49     17:43    Daylength: 10:54 Today
00:00
3
  30.22 in   Clear.
03:00
2
  30.25 in   Clear.
06:00
4
  30.24 in UV
UV Index: 1
Clear.
09:00
7
  30.25 in UV
UV Index: 3
Sunny.
12:00
12
  30.17 in UV
UV Index: 3
Partly cloudy.
15:00
13
  30.00 in UV
UV Index: 1
Partly cloudy.
18:00
10
  29.96 in   Partly cloudy.
21:00
10
0.02 in 29.95 in   Mostly cloudy.
Light rain showers.
 06:48     17:45    Daylength: 10:56 Tomorrow
00:00
10
0.13 in 29.88 in   Cloudy.
Light rain.
03:00
12
0.05 in 29.81 in   Cloudy.
Light rain.
06:00
14
0.01 in 29.77 in   Cloudy.
Light rain.
09:00
16
  29.78 in UV
UV Index: 3
Cloudy.
12:00
19
  29.75 in UV
UV Index: 3
Cloudy.
15:00
16
0.02 in 29.72 in UV
UV Index: 1
Cloudy.
Light rain.
18:00
13
0.01 in 29.74 in   Cloudy.
Light rain.
21:00
13
0.05 in 29.76 in   Cloudy.
Light rain.
 06:47     17:46    Daylength: 10:59 Monday 19 Feb
00:00
13
0.09 in 29.76 in   Mostly cloudy.
Light rain showers.
03:00
13
0.05 in 29.76 in   Mostly cloudy.
Light rain showers.
06:00
11
0.06 in 29.81 in   Mostly cloudy.
Light rain showers.
09:00
8
0.02 in 29.92 in UV
UV Index: 2
Cloudy.
Light rain.
12:00
9
  30.00 in UV
UV Index: 2
Cloudy.
15:00
11
  30.07 in UV
UV Index: 1
Cloudy.
18:00
11
0.01 in 30.20 in   Mostly cloudy.
Light rain showers.
21:00
11
  30.33 in   Mostly cloudy.
 06:45     17:47    Daylength: 11:01 Tuesday 20 Feb
00:00
12
  30.42 in   Mostly cloudy.
03:00
11
  30.51 in   Partly cloudy.
06:00
9
  30.57 in UV
UV Index: 1
Clear.
09:00
9
  30.64 in UV
UV Index: 3
Sunny.
12:00
9
  30.64 in UV
UV Index: 3
Sunny.
15:00
8
  30.60 in UV
UV Index: 1
Sunny.
18:00
6
  30.61 in   Clear.
21:00
6
  30.64 in   Clear.
 06:44     17:48    Daylength: 11:03 Wednesday 21 Feb
00:00
6
  30.61 in   Clear.
03:00
7
  30.58 in   Clear.
06:00
7
  30.55 in UV
UV Index: 1
Clear.
09:00
7
  30.53 in UV
UV Index: 3
Sunny.
12:00
9
  30.43 in UV
UV Index: 4
Mostly cloudy.
15:00
6
  30.35 in UV
UV Index: 1
Mostly cloudy.
18:00
4
  30.32 in   Mostly cloudy.
Move the mouse over the values for info.
  Conditions Temperature Wind Precipitation Thunderstorm probability Dewpoint Pressure UV Index Cloud cover Visibility
 06:50     17:42    Daylength: 10:51 Friday 16 Feb
18:00
5
  0% 34.0° 30.11 in   74% 13 miles
19:00
4
  0% 34.0° 30.13 in   51% 13 miles
20:00
3
  0% 33.8° 30.15 in   27% 12 miles
21:00
3
  0% 33.4° 30.16 in   5% 11 miles
22:00
3
  0% 32.8° 30.18 in   0% 11 miles
23:00
3
  0% 32.0° 30.20 in   0% 13 miles
 06:49     17:43    Daylength: 10:54 Today
00:00
3
  0% 30.9° 30.22 in   5% 13 miles
01:00
3
  0% 29.6° 30.24 in   0% 13 miles
02:00
3
  0% 28.3° 30.24 in   0% 13 miles
03:00
2
  0% 27.4° 30.25 in   5% 12 miles
04:00
2
  0% 26.9° 30.24 in   0% 9.4 miles
05:00
3
  0% 26.7° 30.24 in   0% 9.4 miles
06:00
4
  0% 27.0° 30.24 in   5% 11 miles
07:00
5
  0% 27.8° 30.24 in   0% 14 miles
08:00
6
  0% 30.2° 30.24 in UV
UV Index: 1
0% 14 miles
09:00
7
  0% 32.8° 30.25 in UV
UV Index: 2
5% 14 miles
10:00
9
  0% 34.4° 30.24 in UV
UV Index: 3
0% 14 miles
11:00
10
  0% 35.6° 30.21 in UV
UV Index: 3
0% 14 miles
12:00
12
  0% 36.6° 30.17 in UV
UV Index: 3
8% 15 miles
13:00
13
  0% 37.2° 30.08 in UV
UV Index: 3
22% 15 miles
14:00
13
  0% 37.4° 30.04 in UV
UV Index: 2
37% 15 miles
15:00
13
  0% 37.7° 30.00 in UV
UV Index: 1
45% 15 miles
16:00
12
  0% 37.8° 29.98 in   46% 15 miles
17:00
11
  0% 37.5° 29.97 in   47% 15 miles
18:00
10
  0% 37.7° 29.96 in   47% 14 miles
19:00
10
  0% 37.9° 29.96 in   32% 14 miles
20:00
10
  0% 38.2° 29.96 in   16% 14 miles
21:00
10
  0% 38.9° 29.95 in   16% 12 miles
22:00
10
  0% 40.6° 29.93 in   48% 12 miles
23:00
10
0.01 in 0% 42.6° 29.91 in   80% 12 miles
 06:48     17:45    Daylength: 10:56 Tomorrow
00:00
10
0.04 in 0% 44.5° 29.88 in   97% 8.3 miles
01:00
10
0.04 in 0% 46.6° 29.86 in   98% 8.2 miles
02:00
11
0.05 in <20% 48.7° 29.83 in   99% 8.0 miles
03:00
12
0.02 in <20% 50.5° 29.81 in   100% 10 miles
04:00
12
0.02 in <20% 51.8° 29.79 in   100% 10 miles
05:00
13
0.01 in <20% 52.8° 29.78 in   100% 10 miles
06:00
14
0.01 in <20% 53.6° 29.77 in   100% 12 miles
07:00
14
  <20% 54.1° 29.77 in   100% 12 miles
08:00
15
  <20% 54.8° 29.78 in   100% 13 miles
09:00
16
  20-40% 55.9° 29.78 in UV
UV Index: 1
100% 13 miles
10:00
17
  <20% 56.2° 29.78 in UV
UV Index: 2
100% 13 miles
11:00
18
  <20% 56.2° 29.78 in UV
UV Index: 3
100% 14 miles
12:00
19
  <20% 56.2° 29.75 in UV
UV Index: 3
100% 14 miles
13:00
18
  <20% 55.9° 29.74 in UV
UV Index: 3
100% 14 miles
14:00
17
  <20% 55.2° 29.73 in UV
UV Index: 2
100% 14 miles
15:00
16
0.01 in <20% 54.9° 29.72 in UV
UV Index: 1
100% 12 miles
16:00
15
  <20% 55.0° 29.72 in   100% 12 miles
17:00
14
0.01 in 20-40% 55.1° 29.73 in   100% 12 miles
Move the mouse over the values for info.

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