Updated: August 18, 2019 4:25 pm
Next update: August 19, 2019 5:25 am

WXSIM Forecast for: O'Fallon

Tonight


Monday


Monday
night


Tuesday


Tuesday
night


60% Wednesday


50% Wednesday
night


Thursday


Thursday
night











4
3
3
3
3
9
5
6
5

Temperature/Precipitation/PressureThunder/Dewpoint/Pressure UV/Solar radiation Wind Max/min temperature
  Conditions Temperature Wind Precipitation UV Index Description and notes
Tonight
4
  Partly cloudy in the evening, becoming clear after midnight. Light to moderate fog after midnight.
Monday
3
  UV
UV Index: 8
Sunny. Light to moderate fog in the morning. Hot.
Heat index: 102°.
Monday night
3
  Clear. Patchy light fog after midnight. Warm.
Tuesday
3
  UV
UV Index: 8
Sunny. Light to moderate fog in the morning. Very hot.
Heat index: 113°.
Tuesday night
3
  Clear in the evening, becoming fair after midnight. Light to moderate fog after midnight. Warm.
Wednesday
9
0.25 in
PoP: 60%
UV
UV Index: 7
Partly to mostly cloudy in the morning, becoming mostly cloudy to cloudy in the afternoon. Patchy light fog in the morning. A slight chance of rain in the morning, then a chance of rain in the afternoon.
Hot.
Heat index: 102°. Precipitation mostly around a quarter of an inch.
Wednesday night
5
0.1 in
PoP: 50%
Cloudy. A chance of rain in the evening, then a slight chance of rain after midnight.
Scattered thundershowers possible. Precipitation mostly around a tenth of an inch.
Thursday
6
  UV
UV Index: 8
Partly cloudy in the morning, becoming sunny in the afternoon.
Thursday night
5
  Partly cloudy in the evening, becoming mostly cloudy to cloudy after midnight.
Friday
6
  UV
UV Index: 5
Partly cloudy in the morning, becoming mostly cloudy in the afternoon.
Friday night
4
  Partly to mostly cloudy. Relatively cool.
Saturday
5
  UV
UV Index: 7
Partly to mostly cloudy in the morning, becoming partly cloudy in the afternoon.
Saturday night
4
  Partly cloudy. Patchy light fog after midnight.
Move the mouse over the values for info.
  Conditions Temperature Wind Precipitation Pressure UV Index Description and notes
 06:20     19:52    Daylength: 13:31 Today
03:00
4
  29.89 in   Clear.
Moderate fog.
06:00
2
  29.92 in UV
UV Index: 3
Clear.
Moderate fog.
09:00
Heat index:90F
2
  29.97 in UV
UV Index: 8
Mostly sunny.
12:00
Heat index:98F
3
  29.94 in UV
UV Index: 8
Mostly sunny.
15:00
Heat index:101F
3
  29.90 in UV
UV Index: 4
Mostly sunny.
18:00
Heat index:101F
2
  29.92 in   Mostly sunny.
21:00
Heat index:94F
3
  29.93 in   Clear.
Light fog.
 06:21     19:50    Daylength: 13:29 Tomorrow
00:00
3
  29.94 in   Clear.
Light fog.
03:00
2
  29.94 in   Clear.
Moderate fog.
06:00
1
  29.96 in UV
UV Index: 3
Clear.
Moderate fog.
09:00
Heat index:99F
3
  30.00 in UV
UV Index: 8
Sunny.
12:00
Heat index:109F
4
  29.96 in UV
UV Index: 8
Mostly sunny.
15:00
Heat index:110F
4
  29.90 in UV
UV Index: 4
Mostly sunny.
18:00
Heat index:110F
2
  29.91 in   Sunny.
21:00
Heat index:104F
2
  29.93 in   Clear.
 06:22     19:49    Daylength: 13:27 Wednesday 21 Aug
00:00
5
  29.93 in   Mostly clear.
Light fog.
03:00
5
  29.91 in   Partly cloudy.
Moderate fog.
06:00
4
  29.95 in UV
UV Index: 2
Mostly cloudy.
09:00
Heat index:99F
5
  29.97 in UV
UV Index: 7
Partly cloudy.
12:00
Heat index:104F
9
0.11 in 29.97 in UV
UV Index: 7
Mostly cloudy.
Light rain showers.
15:00
Heat index:100F
9
0.25 in 29.94 in UV
UV Index: 2
Mostly cloudy.
Light rain showers.
18:00
6
0.02 in 29.99 in   Mostly cloudy.
Light rain showers.
21:00
1
  30.03 in   Mostly cloudy.
 06:23     19:48    Daylength: 13:25 Thursday 22 Aug
00:00
5
  30.02 in   Mostly cloudy.
03:00
7
  30.01 in   Mostly cloudy.
06:00
7
  30.04 in UV
UV Index: 3
Partly cloudy.
09:00
5
  30.07 in UV
UV Index: 8
Mostly sunny.
12:00
5
  30.06 in UV
UV Index: 8
Mostly sunny.
15:00
7
  30.02 in UV
UV Index: 4
Mostly sunny.
18:00
5
  30.02 in   Partly cloudy.
21:00
4
  30.07 in   Mostly cloudy.
 06:24     19:46    Daylength: 13:22 Friday 23 Aug
00:00
5
  30.08 in   Cloudy.
03:00
5
  30.10 in   Cloudy.
06:00
4
  30.14 in UV
UV Index: 2
Mostly cloudy.
09:00
6
  30.14 in UV
UV Index: 4
Mostly cloudy.
12:00
6
  30.11 in UV
UV Index: 5
Cloudy.
15:00
6
  30.06 in UV
UV Index: 3
Mostly cloudy.
18:00
5
  30.06 in   Mostly cloudy.
21:00
5
  30.10 in   Mostly cloudy.
 06:24     19:45    Daylength: 13:20 Saturday 24 Aug
00:00
5
  30.10 in   Mostly cloudy.
03:00
4
  30.10 in   Clear.
06:00
3
  30.13 in UV
UV Index: 2
Clear.
Light fog.
09:00
5
  30.13 in UV
UV Index: 7
Sunny.
12:00
6
  30.08 in UV
UV Index: 7
Sunny.
15:00
5
  30.03 in UV
UV Index: 3
Mostly sunny.
18:00
4
  30.01 in   Mostly sunny.
Move the mouse over the values for info.
  Conditions Temperature Wind Precipitation Thunderstorm probability Dewpoint Pressure UV Index Cloud cover Visibility
 06:19     19:53    Daylength: 13:34 Sunday 18 Aug
01:00
6
  <20% 68.2° 29.90 in   1% 7.1 miles
02:00
5
  <20% 67.9° 29.90 in   1% 2.3 miles
03:00
4
  <20% 67.9° 29.89 in   5% 1.5 miles
04:00
4
  <20% 67.9° 29.90 in   0% 1.0 miles
05:00
3
  <20% 67.9° 29.90 in   0% 1.0 miles
06:00
2
  20-40% 68.3° 29.92 in   5% 11 miles
07:00
2
  20-40% 70.2° 29.94 in UV
UV Index: 1
1% 10 miles
08:00
2
  20-40% 71.7° 29.96 in UV
UV Index: 3
1% 10 miles
09:00
Heat index:90F
2
  20-40% 72.6° 29.97 in UV
UV Index: 5
6% 9.9 miles
10:00
Heat index:93F
2
  20-40% 72.9° 29.97 in UV
UV Index: 7
1% 9.8 miles
11:00
Heat index:96F
3
  20-40% 73.1° 29.96 in UV
UV Index: 8
0% 9.9 miles
12:00
Heat index:98F
3
  20-40% 73.4° 29.94 in UV
UV Index: 8
1% 9.9 miles
13:00
Heat index:99F
3
  20-40% 73.3° 29.92 in UV
UV Index: 8
4% 10 miles
14:00
Heat index:100F
3
  20-40% 73.3° 29.91 in UV
UV Index: 6
7% 10 miles
15:00
Heat index:101F
3
  20-40% 73.3° 29.90 in UV
UV Index: 4
13% 10 miles
16:00
Heat index:101F
3
  20-40% 73.2° 29.91 in UV
UV Index: 2
9% 10 miles
17:00
Heat index:100F
3
  20-40% 73.4° 29.91 in UV
UV Index: 1
10% 10 miles
18:00
Heat index:97F
2
  20-40% 73.5° 29.92 in   13% 10 miles
19:00
Heat index:94F
2
  20-40% 74.3° 29.93 in   7% 9.9 miles
20:00
3
  20-40% 75.3° 29.93 in   4% 9.8 miles
21:00
3
  20-40% 75.6° 29.93 in   1% 9.5 miles
22:00
3
  20-40% 75.9° 29.93 in   0% 6.1 miles
23:00
3
  20-40% 75.9° 29.94 in   0% 4.2 miles
 06:20     19:52    Daylength: 13:31 Today
00:00
3
  <20% 75.7° 29.94 in   0% 3.6 miles
01:00
3
  <20% 75.4° 29.95 in   0% 3.0 miles
02:00
3
  <20% 75.0° 29.95 in   0% 2.2 miles
03:00
2
  <20% 74.7° 29.94 in   0% 2.0 miles
04:00
2
  <20% 74.3° 29.94 in   0% 1.5 miles
05:00
2
  <20% 73.9° 29.95 in   0% 1.2 miles
06:00
1
  <20% 74.2° 29.96 in   0% 3.1 miles
07:00
2
  <20% 75.4° 29.98 in UV
UV Index: 1
0% 8.9 miles
08:00
Heat index:94F
3
  20-40% 76.4° 29.99 in UV
UV Index: 3
0% 8.9 miles
09:00
Heat index:99F
3
  20-40% 76.9° 30.00 in UV
UV Index: 5
0% 9.0 miles
10:00
Heat index:103F
4
  20-40% 76.9° 30.00 in UV
UV Index: 7
0% 9.2 miles
11:00
Heat index:107F
4
  20-40% 76.7° 29.99 in UV
UV Index: 8
0% 9.4 miles
12:00
Heat index:109F
4
  20-40% 76.5° 29.96 in UV
UV Index: 8
2% 9.7 miles
13:00
Heat index:109F
4
  40-60% 75.7° 29.93 in UV
UV Index: 8
4% 10 miles
14:00
Heat index:110F
4
  40-60% 74.9° 29.91 in UV
UV Index: 6
7% 10 miles
15:00
Heat index:110F
4
  40-60% 74.4° 29.90 in UV
UV Index: 4
8% 10 miles
16:00
Heat index:110F
3
  40-60% 74.2° 29.90 in UV
UV Index: 2
6% 10 miles
17:00
Heat index:109F
3
  40-60% 74.7° 29.90 in UV
UV Index: 1
4% 10 miles
18:00
Heat index:107F
2
  40-60% 75.0° 29.91 in   2% 10 miles
19:00
Heat index:104F
2
  40-60% 75.8° 29.92 in   2% 9.9 miles
20:00
Heat index:100F
2
  40-60% 76.6° 29.93 in   2% 9.6 miles
21:00
2
  20-40% 77.0° 29.93 in   2% 9.4 miles
22:00
3
  20-40% 77.5° 29.93 in   1% 9.4 miles
23:00
4
  20-40% 77.6° 29.93 in   1% 9.4 miles
 06:21     19:50    Daylength: 13:29 Tomorrow
00:00
5
  20-40% 77.5° 29.93 in   2% 9.6 miles
Move the mouse over the values for info.

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