Updated: August 16, 2018 4:25 pm
Next update: August 17, 2018 5:25 am

WXSIM Forecast for: O'Fallon

Tonight


Friday


Friday
night


Saturday


Saturday
night


Sunday


Sunday
night


70% Monday


Monday
night











3
6
4
6
3
4
6
5
5

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 partly to mostly cloudy after midnight. Patchy light fog after midnight.
Friday
6
  UV
UV Index: 8
Partly cloudy in the morning, becoming sunny in the afternoon. Light to moderate fog in the morning. Hot.
Heat index: 97°.
Friday night
4
  Clear. Light to moderate fog in the evening, then moderate to dense fog after midnight.
Saturday
6
  UV
UV Index: 8
Sunny. Moderate to dense fog in the morning. Hot.
Heat index: 95°.
Saturday night
3
  Clear. Patchy light fog in the evening, then moderate fog after midnight.
Sunday
4
<0.1 in
PoP: 20%
UV
UV Index: 6
Partly to mostly sunny in the morning, becoming mostly cloudy to cloudy in the afternoon. Moderate fog in the morning. A slight chance of rain. Hot.
Heat index: 94°. Precipitation less than a tenth of an inch.
Sunday night
6
<0.1 in
PoP: 40%
Mostly cloudy to cloudy in the evening, becoming cloudy after midnight. Patchy light fog after midnight. A slight chance of rain in the evening, then a chance of rain after midnight. Precipitation less than a tenth of an inch.
Monday
5
0.25 in
PoP: 70%
Dense overcast. Light to moderate fog in the morning, then patchy light fog in the afternoon. Rain likely. Precipitation showery or intermittent. Precipitation mostly around a quarter of an inch.
Monday night
5
  Partly to mostly cloudy in the evening, becoming fair to partly cloudy after midnight. Moderate fog in the evening, then moderate to dense fog after midnight.
Tuesday
10
<0.1 in
PoP: 20%
UV
UV Index: 6
Sunny in the morning, becoming partly to mostly sunny in the afternoon. Moderate to dense fog in the morning. A slight chance of rain in the afternoon. Precipitation less than a tenth of an inch.
Tuesday night
6
  Clear. Moderate fog.
Wednesday
5
  UV
UV Index: 8
Sunny. Moderate fog in the morning.
Wednesday night
0
  Clear. Patchy light fog after midnight. Relatively cool.
Move the mouse over the values for info.
  Conditions Temperature Wind Precipitation Pressure UV Index Description and notes
 06:18     19:54    Daylength: 13:35 Today
03:00
4
  29.92 in   Mostly cloudy.
Light fog.
06:00
4
0.01 in 29.93 in UV
UV Index: 3
Mostly cloudy.
Light rain showers.
09:00
4
  29.96 in UV
UV Index: 8
Partly cloudy.
12:00
Heat index:94F
7
  29.93 in UV
UV Index: 8
Sunny.
15:00
Heat index:94F
7
  29.89 in UV
UV Index: 4
Mostly sunny.
18:00
Heat index:94F
5
  29.91 in   Sunny.
21:00
4
  29.94 in   Clear.
Moderate fog.
 06:19     19:53    Daylength: 13:33 Tomorrow
00:00
4
  29.95 in   Clear.
Moderate fog.
03:00
4
  29.95 in   Clear.
06:00
5
  29.97 in UV
UV Index: 2
Clear.
Moderate fog.
09:00
6
  30.01 in UV
UV Index: 8
Sunny.
12:00
Heat index:92F
7
  29.97 in UV
UV Index: 8
Mostly sunny.
15:00
Heat index:93F
6
  29.91 in UV
UV Index: 4
Mostly sunny.
18:00
Heat index:93F
4
  29.91 in   Sunny.
21:00
3
  29.94 in   Clear.
Moderate fog.
 06:20     19:52    Daylength: 13:31 Sunday 19 Aug
00:00
3
  29.93 in   Clear.
Moderate fog.
03:00
2
  29.93 in   Clear.
Moderate fog.
06:00
1
  29.96 in UV
UV Index: 2
Partly cloudy.
Moderate fog.
09:00
4
  29.97 in UV
UV Index: 6
Mostly cloudy.
12:00
Heat index:91F
5
0.01 in 29.95 in UV
UV Index: 6
Mostly cloudy.
Light rain showers.
15:00
Heat index:92F
6
  29.90 in UV
UV Index: 2
Mostly cloudy.
18:00
Heat index:91F
6
  29.90 in   Mostly cloudy.
21:00
7
  29.94 in   Mostly cloudy.
 06:21     19:50    Daylength: 13:29 Monday 20 Aug
00:00
5
0.02 in 29.94 in   Mostly cloudy.
Light rain showers.
03:00
5
0.05 in 29.91 in   Mostly cloudy.
Light rain showers.
06:00
4
0.08 in 29.92 in UV
UV Index: 1
Mostly cloudy.
Light rain showers.
09:00
4
0.04 in 29.93 in UV
UV Index: 3
Mostly cloudy.
Light rain showers.
12:00
5
0.13 in 29.89 in UV
UV Index: 3
Mostly cloudy.
Light rain showers.
15:00
8
0.03 in 29.83 in UV
UV Index: 2
Mostly cloudy.
Light rain showers.
18:00
6
  29.84 in   Mostly cloudy.
Light fog.
21:00
5
  29.86 in   Mostly clear.
Moderate fog.
 06:22     19:49    Daylength: 13:26 Tuesday 21 Aug
00:00
5
  29.85 in   Mostly clear.
03:00
5
  29.86 in   Mostly clear.
06:00
6
  29.90 in UV
UV Index: 2
Clear.
Moderate fog.
09:00
7
  29.95 in UV
UV Index: 7
Partly cloudy.
Light fog.
12:00
8
0.03 in 29.94 in UV
UV Index: 6
Mostly cloudy.
Light rain showers.
15:00
11
  29.93 in UV
UV Index: 4
Sunny.
18:00
8
  29.97 in   Sunny.
21:00
6
  30.02 in   Clear.
Moderate fog.
 06:23     19:47    Daylength: 13:24 Wednesday 22 Aug
00:00
5
  30.02 in   Clear.
Moderate fog.
03:00
5
  30.01 in   Clear.
Moderate fog.
06:00
4
  30.05 in UV
UV Index: 3
Clear.
Moderate fog.
09:00
5
  30.07 in UV
UV Index: 8
Sunny.
12:00
5
  30.05 in UV
UV Index: 8
Sunny.
15:00
6
  30.01 in UV
UV Index: 4
Sunny.
18:00
3
  30.01 in   Sunny.
Move the mouse over the values for info.
  Conditions Temperature Wind Precipitation Thunderstorm probability Dewpoint Pressure UV Index Cloud cover Visibility
 06:17     19:56    Daylength: 13:38 Thursday 16 Aug
02:00
4
  <20% 72.4° 29.93 in   36% 5.6 miles
03:00
4
  <20% 72.2° 29.92 in   43% 4.7 miles
04:00
4
  <20% 71.8° 29.92 in   51% 4.5 miles
05:00
4
  <20% 71.2° 29.92 in   59% 1.7 miles
06:00
4
  <20% 71.3° 29.93 in   63% 0.8 miles
07:00
4
0.01 in 0% 72.1° 29.94 in UV
UV Index: 1
52% 1.1 miles
08:00
4
  0% 72.6° 29.95 in UV
UV Index: 3
40% 10 miles
09:00
4
  0% 72.6° 29.96 in UV
UV Index: 5
28% 11 miles
10:00
Heat index:89F
5
  <20% 71.9° 29.96 in UV
UV Index: 7
19% 11 miles
11:00
Heat index:92F
6
  <20% 70.9° 29.95 in UV
UV Index: 8
10% 11 miles
12:00
Heat index:94F
7
  <20% 70.0° 29.93 in UV
UV Index: 8
1% 11 miles
13:00
Heat index:94F
7
  <20% 69.3° 29.91 in UV
UV Index: 8
1% 12 miles
14:00
Heat index:94F
7
  <20% 68.9° 29.90 in UV
UV Index: 6
1% 12 miles
15:00
Heat index:94F
7
  <20% 69.0° 29.89 in UV
UV Index: 4
6% 12 miles
16:00
Heat index:94F
7
  <20% 68.8° 29.90 in UV
UV Index: 2
1% 13 miles
17:00
Heat index:92F
6
  <20% 68.6° 29.91 in UV
UV Index: 1
2% 12 miles
18:00
5
  <20% 69.3° 29.91 in   2% 12 miles
19:00
4
  0% 70.5° 29.92 in   1% 12 miles
20:00
4
  0% 71.3° 29.93 in   1% 12 miles
21:00
4
  0% 71.7° 29.94 in   0% 5.0 miles
22:00
4
  0% 71.6° 29.94 in   0% 0.9 miles
23:00
4
  0% 71.4° 29.95 in   0% 0.3 miles
 06:18     19:54    Daylength: 13:35 Today
00:00
4
  0% 71.1° 29.95 in   0% 0.2 miles
01:00
4
  0% 70.7° 29.95 in   0% 0.2 miles
02:00
4
  0% 70.4° 29.95 in   0% 0.2 miles
03:00
4
  0% 70.1° 29.95 in   0% 0.2 miles
04:00
4
  0% 69.6° 29.95 in   0% 0.2 miles
05:00
5
  0% 68.9° 29.95 in   0% 0.2 miles
06:00
5
  0% 68.8° 29.97 in   0% 0.2 miles
07:00
6
  0% 69.6° 29.99 in UV
UV Index: 1
0% 0.2 miles
08:00
6
  0% 69.9° 30.00 in UV
UV Index: 2
0% 0.8 miles
09:00
6
  0% 70.0° 30.01 in UV
UV Index: 5
0% 11 miles
10:00
7
  0% 69.9° 30.00 in UV
UV Index: 7
1% 11 miles
11:00
7
  0% 69.7° 29.99 in UV
UV Index: 8
1% 12 miles
12:00
Heat index:92F
7
  0% 69.3° 29.97 in UV
UV Index: 8
4% 12 miles
13:00
Heat index:93F
7
  0% 68.9° 29.94 in UV
UV Index: 8
11% 12 miles
14:00
Heat index:93F
7
  0% 68.6° 29.92 in UV
UV Index: 6
17% 12 miles
15:00
Heat index:93F
6
  0% 68.7° 29.91 in UV
UV Index: 4
21% 13 miles
16:00
Heat index:93F
6
  0% 68.3° 29.91 in UV
UV Index: 2
14% 13 miles
17:00
Heat index:91F
5
  0% 67.9° 29.91 in UV
UV Index: 1
8% 12 miles
18:00
4
  0% 68.4° 29.91 in   2% 12 miles
19:00
3
  0% 69.4° 29.93 in   2% 12 miles
20:00
3
  0% 70.1° 29.94 in   1% 11 miles
21:00
3
  0% 70.4° 29.94 in   0% 5.1 miles
22:00
3
  0% 70.5° 29.94 in   0% 1.7 miles
23:00
3
  0% 70.4° 29.94 in   0% 0.6 miles
 06:19     19:53    Daylength: 13:33 Tomorrow
00:00
3
  0% 70.1° 29.93 in   0% 0.4 miles
01:00
3
  0% 69.7° 29.94 in   0% 0.3 miles
Move the mouse over the values for info.

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