Updated: September 21, 2017 4:25 pm
Next update: September 22, 2017 5:25 am

WXSIM Forecast for: O'Fallon

Tonight


Friday


Friday
night


Saturday


Saturday
night


Sunday


Sunday
night


Monday


Monday
night











6
5
4
4
4
7
4
8
4

Temperature/Precipitation/PressureThunder/Dewpoint/Pressure UV/Solar radiation Wind Max/min temperature
  Conditions Temperature Wind Precipitation UV Index Description and notes
Tonight
6
  Partly cloudy in the evening, becoming mostly clear after midnight. Moderate fog after midnight. Warm.
Friday
5
  UV
UV Index: 7
Sunny. Moderate to dense fog in the morning. Very hot.
Heat index: 103°.
Friday night
4
  Clear. Patchy light fog in the evening, then moderate fog after midnight. Warm.
Saturday
4
  UV
UV Index: 7
Sunny. Moderate fog in the morning. Unusually hot.
Heat index: 100°.
Saturday night
4
  Mostly clear in the evening, becoming clear after midnight. Moderate fog in the evening, then moderate to dense fog after midnight. Warm.
Sunday
7
  UV
UV Index: 7
Sunny in the morning, becoming partly to mostly sunny in the afternoon. Moderate to dense fog in the morning. Unusually hot.
Heat index: 98°.
Sunday night
4
  Mostly clear in the evening, becoming clear after midnight. Moderate fog in the evening, then moderate to dense fog after midnight. Warm.
Monday
8
  UV
UV Index: 7
Sunny. Moderate to dense fog in the morning. Unusually hot.
Heat index: 98°.
Monday night
4
  Clear in the evening, becoming fair after midnight. Moderate fog in the evening, then moderate to dense fog after midnight. Warm.
Tuesday
7
  UV
UV Index: 7
Mostly sunny. Moderate to dense fog in the morning. Unusually hot.
Heat index: 97°.
Tuesday night
4
<0.1 in
PoP: 30%
Fair in the evening, becoming partly cloudy after midnight. Moderate fog in the evening, then moderate to dense fog after midnight. A chance of rain after midnight. Warm. Precipitation less than a tenth of an inch.
Wednesday
3
<0.25 in
PoP: 40%
UV
UV Index: 4
Mostly cloudy in the morning, becoming partly cloudy in the afternoon. Moderate fog in the morning, then light to moderate fog in the afternoon. A chance of rain in the morning, then a slight chance of rain in the afternoon. Warm. Precipitation less than a quarter of an inch.
Wednesday night
5
0.1 in
PoP: 50%
Partly to mostly cloudy in the evening, becoming mostly cloudy to cloudy after midnight. Moderate fog. A slight chance of rain in the evening, then a chance of rain after midnight. Precipitation mostly around a tenth of an inch.
Move the mouse over the values for info.
  Conditions Temperature Wind Precipitation Pressure UV Index Description and notes
 06:50     19:00    Daylength: 12:10 Thursday 21 Sep
06:00
4
  30.01 in UV
UV Index: 2
Clear.
Moderate fog.
09:00
5
  30.05 in UV
UV Index: 7
Sunny.
12:00
Heat index:96F
6
  30.01 in UV
UV Index: 7
Sunny.
15:00
Heat index:97F
6
  29.96 in UV
UV Index: 2
Sunny.
18:00
Heat index:96F
5
  29.97 in   Sunny.
21:00
5
  29.98 in   Clear.
Light fog.
 06:51     18:59    Daylength: 12:07 Today
00:00
5
  29.99 in   Clear.
Moderate fog.
03:00
3
  29.99 in   Clear.
Moderate fog.
06:00
2
  30.02 in UV
UV Index: 2
Clear.
Moderate fog.
09:00
3
  30.07 in UV
UV Index: 7
Sunny.
12:00
Heat index:95F
4
  30.02 in UV
UV Index: 7
Mostly sunny.
15:00
Heat index:95F
5
  29.97 in UV
UV Index: 2
Mostly sunny.
18:00
5
  29.98 in   Mostly sunny.
Light fog.
21:00
5
  29.99 in   Clear.
Moderate fog.
 06:52     18:57    Daylength: 12:05 Tomorrow
00:00
3
  29.99 in   Clear.
Moderate fog.
03:00
3
  29.99 in   Clear.
06:00
2
  30.02 in UV
UV Index: 1
Clear.
09:00
3
  30.04 in UV
UV Index: 7
Sunny.
Moderate fog.
12:00
6
  29.99 in UV
UV Index: 7
Partly cloudy.
15:00
9
  29.92 in UV
UV Index: 2
Partly cloudy.
18:00
5
  29.93 in   Mostly sunny.
Light fog.
21:00
3
  29.96 in   Clear.
Moderate fog.
 06:53     18:56    Daylength: 12:02 Sunday 24 Sep
00:00
4
  29.96 in   Clear.
Moderate fog.
03:00
3
  29.96 in   Clear.
06:00
3
  30.00 in UV
UV Index: 1
Clear.
Moderate fog.
09:00
5
  30.02 in UV
UV Index: 7
Sunny.
12:00
8
  29.97 in UV
UV Index: 7
Sunny.
15:00
9
  29.91 in UV
UV Index: 2
Sunny.
18:00
5
  29.93 in   Mostly sunny.
Light fog.
21:00
5
  29.96 in   Mostly clear.
Moderate fog.
 06:53     18:54    Daylength: 12:00 Monday 25 Sep
00:00
4
  29.96 in   Mostly clear.
03:00
2
  29.97 in   Partly cloudy.
06:00
2
  29.99 in UV
UV Index: 1
Partly cloudy.
09:00
4
  30.01 in UV
UV Index: 7
Sunny.
Moderate fog.
12:00
7
  29.96 in UV
UV Index: 7
Partly cloudy.
15:00
8
  29.91 in UV
UV Index: 2
Partly cloudy.
18:00
5
  29.93 in   Mostly sunny.
Moderate fog.
21:00
4
  29.95 in   Clear.
Moderate fog.
 06:54     18:52    Daylength: 11:57 Tuesday 26 Sep
00:00
3
  29.95 in   Mostly clear.
Moderate fog.
03:00
3
  29.94 in   Partly cloudy.
Moderate fog.
06:00
4
0.06 in 29.96 in UV
UV Index: 1
Partly cloudy.
Light rain showers.
09:00
3
0.01 in 29.98 in UV
UV Index: 4
Partly cloudy.
Light rain showers.
12:00
3
  29.93 in UV
UV Index: 5
Partly cloudy.
15:00
3
  29.87 in UV
UV Index: 2
Mostly sunny.
18:00
4
  29.89 in   Partly cloudy.
Moderate fog.
Move the mouse over the values for info.
  Conditions Temperature Wind Precipitation Thunderstorm probability Dewpoint Pressure UV Index Cloud cover Visibility
 06:50     19:00    Daylength: 12:10 Thursday 21 Sep
05:00
4
  0% 69.9° 29.99 in   0% 0.3 miles
06:00
4
  0% 69.7° 30.01 in   1% 0.2 miles
07:00
4
  0% 70.8° 30.03 in   0% 0.2 miles
08:00
4
  0% 71.6° 30.04 in UV
UV Index: 2
0% 3.5 miles
09:00
5
  0% 72.0° 30.05 in UV
UV Index: 4
0% 12 miles
10:00
Heat index:90F
6
  0% 71.7° 30.04 in UV
UV Index: 6
0% 12 miles
11:00
Heat index:94F
6
  0% 70.6° 30.03 in UV
UV Index: 7
0% 12 miles
12:00
Heat index:96F
6
  <20% 69.4° 30.01 in UV
UV Index: 7
0% 12 miles
13:00
Heat index:97F
6
  0% 68.1° 29.99 in UV
UV Index: 6
0% 13 miles
14:00
Heat index:97F
6
  0% 66.9° 29.97 in UV
UV Index: 4
0% 13 miles
15:00
Heat index:97F
6
  0% 65.8° 29.96 in UV
UV Index: 2
0% 13 miles
16:00
Heat index:96F
6
  0% 65.0° 29.96 in UV
UV Index: 1
0% 13 miles
17:00
5
  0% 64.5° 29.97 in   0% 13 miles
18:00
5
  0% 65.2° 29.97 in   0% 13 miles
19:00
4
  0% 66.8° 29.97 in   1% 13 miles
20:00
4
  0% 68.4° 29.98 in   1% 12 miles
21:00
5
  0% 69.6° 29.98 in   1% 12 miles
22:00
5
  0% 69.9° 29.99 in   1% 5.0 miles
23:00
5
  0% 69.8° 29.99 in   1% 1.3 miles
 06:51     18:59    Daylength: 12:07 Today
00:00
5
  0% 69.6° 29.99 in   0% 0.5 miles
01:00
5
  0% 69.5° 29.99 in   0% 0.4 miles
02:00
4
  0% 69.2° 29.99 in   0% 0.3 miles
03:00
3
  0% 68.9° 29.99 in   0% 0.3 miles
04:00
3
  0% 68.6° 29.99 in   1% 0.2 miles
05:00
2
  0% 68.2° 30.00 in   2% 0.2 miles
06:00
2
  0% 68.1° 30.02 in   2% 0.2 miles
07:00
1
  0% 69.2° 30.04 in   3% 0.3 miles
08:00
2
  0% 69.8° 30.06 in UV
UV Index: 2
3% 2.3 miles
09:00
3
  0% 70.2° 30.07 in UV
UV Index: 4
3% 11 miles
10:00
3
  0% 70.4° 30.06 in UV
UV Index: 6
3% 11 miles
11:00
4
  0% 69.9° 30.05 in UV
UV Index: 7
2% 11 miles
12:00
Heat index:95F
4
  0% 69.2° 30.02 in UV
UV Index: 7
5% 11 miles
13:00
Heat index:95F
6
  0% 68.3° 30.00 in UV
UV Index: 6
12% 12 miles
14:00
Heat index:95F
6
  0% 67.4° 29.98 in UV
UV Index: 4
20% 12 miles
15:00
Heat index:94F
5
  0% 66.4° 29.97 in UV
UV Index: 2
24% 12 miles
16:00
5
  0% 65.1° 29.97 in UV
UV Index: 1
24% 12 miles
17:00
5
  0% 64.0° 29.97 in   24% 12 miles
18:00
5
  0% 64.3° 29.98 in   24% 12 miles
19:00
5
  0% 65.7° 29.98 in   18% 12 miles
20:00
5
  0% 67.5° 29.99 in   11% 3.8 miles
21:00
5
  0% 68.8° 29.99 in   4% 1.1 miles
22:00
5
  0% 69.2° 29.99 in   3% 0.5 miles
23:00
4
  0% 69.1° 29.99 in   3% 0.3 miles
 06:52     18:57    Daylength: 12:05 Tomorrow
00:00
3
  0% 68.9° 29.99 in   2% 0.3 miles
01:00
3
  0% 68.7° 29.99 in   1% 0.2 miles
02:00
3
  0% 68.4° 29.99 in   1% 0.2 miles
03:00
3
  0% 68.2° 29.99 in   0% 0.2 miles
04:00
2
  0% 67.9° 30.00 in   0% 0.2 miles
Move the mouse over the values for info.

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