Updated: July 18, 2019 6:37 am
Next update: July 18, 2019 4:25 pm

WXSIM Forecast for: O'Fallon

Today


Tonight


Friday


Friday
night


Saturday


Saturday
night


Sunday


Sunday
night


Monday











9
7
8
6
6
5
8
7
6

Temperature/Precipitation/PressureThunder/Dewpoint/Pressure UV/Solar radiation Wind Max/min temperature
  Conditions Temperature Wind Precipitation UV Index Description and notes
Today
9
  UV
UV Index: 10
Partly cloudy in the morning, becoming sunny in the afternoon. Hot.
Heat index: 105°.
Tonight
7
  Clear. Warm.
Friday
8
  UV
UV Index: 10
Sunny. Very hot.
Heat index: 113°.
Friday night
6
  Clear. Moderate to dense fog after midnight. Warm.
Saturday
6
  UV
UV Index: 9
Sunny. Moderate to dense fog in the morning. Hot.
Heat index: 115°.
Saturday night
5
  Clear in the evening, becoming partly cloudy after midnight. Moderate fog in the evening, then moderate to dense fog after midnight.
Sunday
8
<0.1 in
PoP: 20%
UV
UV Index: 7
Partly to mostly cloudy in the morning, becoming mostly cloudy in the afternoon. A slight chance of rain.
Scattered thundershowers possible.
Heat index: 95°. Precipitation less than a tenth of an inch.
Sunday night
7
  Fair to partly cloudy in the evening, becoming partly cloudy after midnight. Moderate to dense fog.
Monday
6
<0.1 in
PoP: 30%
UV
UV Index: 8
Mostly cloudy in the morning, becoming partly to mostly sunny in the afternoon. Patchy light fog in the morning. A chance of rain. Precipitation less than a tenth of an inch.
Monday night
5
  Mostly clear in the evening, becoming clear after midnight. Moderate fog in the evening, then moderate to dense fog after midnight. Relatively cool.
Tuesday
7
  UV
UV Index: 10
Sunny. Moderate to dense fog in the morning.
Tuesday night
3
  Clear. Patchy light fog in the evening, then moderate fog after midnight. Relatively cool.
Wednesday
3
  UV
UV Index: 9
Sunny. Moderate fog in the morning.
Wednesday night
2
  Clear. Light to moderate fog after midnight. Relatively cool.
Move the mouse over the values for info.
  Conditions Temperature Wind Precipitation Pressure UV Index Description and notes
 05:52     20:26    Daylength: 14:33 Today
15:00
Heat index:108F
9
  29.81 in UV
UV Index: 5
Sunny.
18:00
Heat index:108F
7
  29.81 in   Sunny.
21:00
Heat index:99F
7
  29.82 in   Clear.
 05:53     20:25    Daylength: 14:32 Tomorrow
00:00
7
  29.83 in   Clear.
03:00
7
  29.83 in   Clear.
06:00
7
  29.86 in UV
UV Index: 4
Sunny.
09:00
Heat index:100F
9
  29.91 in UV
UV Index: 9
Sunny.
12:00
Heat index:107F
9
  29.88 in UV
UV Index: 10
Sunny.
15:00
Heat index:108F
8
  29.84 in UV
UV Index: 5
Sunny.
18:00
Heat index:108F
6
  29.85 in   Sunny.
21:00
Heat index:99F
6
  29.85 in   Clear.
Light fog.
 05:54     20:24    Daylength: 14:30 Saturday 20 Jul
00:00
7
  29.86 in   Clear.
Moderate fog.
03:00
6
  29.87 in   Clear.
06:00
5
  29.90 in UV
UV Index: 2
Sunny.
Moderate fog.
09:00
5
  29.92 in UV
UV Index: 9
Sunny.
Moderate fog.
12:00
Heat index:104F
6
  29.89 in UV
UV Index: 10
Sunny.
15:00
Heat index:105F
6
  29.85 in UV
UV Index: 5
Sunny.
18:00
Heat index:105F
4
  29.84 in   Sunny.
21:00
Heat index:99F
5
  29.85 in   Clear.
Moderate fog.
 05:54     20:23    Daylength: 14:29 Sunday 21 Jul
00:00
7
  29.85 in   Partly cloudy.
03:00
6
0.02 in 29.87 in   Mostly cloudy.
Light rain showers.
06:00
7
  29.91 in UV
UV Index: 3
Mostly cloudy.
09:00
7
  29.90 in UV
UV Index: 7
Mostly cloudy.
12:00
10
  29.91 in UV
UV Index: 6
Cloudy.
15:00
7
  29.91 in UV
UV Index: 4
Mostly cloudy.
18:00
8
  29.94 in   Partly cloudy.
Moderate fog.
21:00
7
  29.98 in   Mostly clear.
Moderate fog.
 05:55     20:23    Daylength: 14:27 Monday 22 Jul
00:00
7
  30.00 in   Mostly clear.
Moderate fog.
03:00
7
  30.01 in   Partly cloudy.
Moderate fog.
06:00
4
0.01 in 30.04 in UV
UV Index: 2
Mostly cloudy.
Light rain showers.
09:00
5
0.03 in 30.09 in UV
UV Index: 7
Mostly cloudy.
Light rain showers.
12:00
5
0.01 in 30.09 in UV
UV Index: 8
Partly cloudy.
Light rain showers.
15:00
8
  30.05 in UV
UV Index: 5
Mostly sunny.
18:00
7
  30.06 in   Mostly sunny.
21:00
5
  30.12 in   Mostly clear.
Moderate fog.
 05:56     20:22    Daylength: 14:25 Tuesday 23 Jul
00:00
5
  30.15 in   Mostly clear.
03:00
4
  30.15 in   Clear.
06:00
4
  30.18 in UV
UV Index: 3
Sunny.
Moderate fog.
09:00
6
  30.20 in UV
UV Index: 9
Sunny.
Light fog.
12:00
8
  30.17 in UV
UV Index: 10
Sunny.
15:00
8
  30.13 in UV
UV Index: 5
Sunny.
18:00
5
  30.12 in   Sunny.
21:00
3
  30.15 in   Clear.
Moderate fog.
 05:57     20:21    Daylength: 14:24 Wednesday 24 Jul
00:00
3
  30.15 in   Clear.
Moderate fog.
03:00
3
  30.15 in   Clear.
Moderate fog.
06:00
2
  30.18 in UV
UV Index: 4
Sunny.
Moderate fog.
09:00
4
  30.19 in UV
UV Index: 9
Sunny.
12:00
4
  30.16 in UV
UV Index: 9
Sunny.
15:00
4
  30.12 in UV
UV Index: 5
Sunny.
18:00
3
  30.11 in   Sunny.
Move the mouse over the values for info.
  Conditions Temperature Wind Precipitation Thunderstorm probability Dewpoint Pressure UV Index Cloud cover Visibility
 05:52     20:26    Daylength: 14:33 Today
14:00
Heat index:108F
9
  20-40% 75.5° 29.82 in UV
UV Index: 8
5% 13 miles
15:00
Heat index:108F
9
  20-40% 75.4° 29.81 in UV
UV Index: 5
1% 13 miles
16:00
Heat index:108F
9
  20-40% 74.4° 29.81 in UV
UV Index: 3
0% 13 miles
17:00
Heat index:106F
8
  20-40% 73.6° 29.81 in UV
UV Index: 1
0% 13 miles
18:00
Heat index:103F
7
  20-40% 72.5° 29.81 in   0% 13 miles
19:00
Heat index:99F
7
  20-40% 72.1° 29.82 in   0% 13 miles
20:00
7
  20-40% 72.0° 29.82 in   0% 12 miles
21:00
7
  <20% 72.0° 29.82 in   0% 12 miles
22:00
7
  <20% 72.5° 29.83 in   0% 12 miles
23:00
7
  <20% 73.1° 29.83 in   0% 12 miles
 05:53     20:25    Daylength: 14:32 Tomorrow
00:00
7
  <20% 73.4° 29.83 in   0% 12 miles
01:00
7
  <20% 73.3° 29.83 in   0% 11 miles
02:00
7
  <20% 73.2° 29.83 in   0% 11 miles
03:00
7
  0% 72.8° 29.83 in   0% 11 miles
04:00
7
  0% 72.5° 29.83 in   0% 11 miles
05:00
6
  0% 72.9° 29.84 in   0% 11 miles
06:00
7
  <20% 73.5° 29.86 in UV
UV Index: 1
0% 11 miles
07:00
7
  <20% 74.3° 29.88 in UV
UV Index: 2
0% 11 miles
08:00
8
  <20% 74.9° 29.90 in UV
UV Index: 4
0% 11 miles
09:00
Heat index:100F
9
  <20% 75.4° 29.91 in UV
UV Index: 6
0% 11 miles
10:00
Heat index:103F
10
  <20% 75.5° 29.91 in UV
UV Index: 8
0% 11 miles
11:00
Heat index:105F
10
  <20% 75.3° 29.90 in UV
UV Index: 9
0% 11 miles
12:00
Heat index:107F
9
  20-40% 75.2° 29.88 in UV
UV Index: 10
0% 12 miles
13:00
Heat index:108F
9
  20-40% 75.1° 29.85 in UV
UV Index: 9
0% 12 miles
14:00
Heat index:108F
9
  20-40% 74.8° 29.84 in UV
UV Index: 8
0% 12 miles
15:00
Heat index:108F
8
  20-40% 74.7° 29.84 in UV
UV Index: 5
0% 12 miles
16:00
Heat index:108F
8
  20-40% 73.9° 29.84 in UV
UV Index: 3
0% 12 miles
17:00
Heat index:106F
7
  20-40% 73.2° 29.84 in UV
UV Index: 1
0% 12 miles
18:00
Heat index:103F
6
  20-40% 72.5° 29.85 in   0% 11 miles
19:00
Heat index:99F
6
  20-40% 72.6° 29.85 in   0% 11 miles
20:00
6
  <20% 72.9° 29.85 in   0% 11 miles
21:00
6
  <20% 73.1° 29.85 in   0% 11 miles
22:00
6
  <20% 73.6° 29.85 in   0% 5.7 miles
23:00
7
  <20% 74.0° 29.85 in   0% 2.1 miles
 05:54     20:24    Daylength: 14:30 Saturday 20 Jul
00:00
7
  <20% 74.2° 29.86 in   0% 0.8 miles
01:00
7
  <20% 74.3° 29.87 in   0% 0.3 miles
02:00
6
  <20% 74.5° 29.87 in   0% 0.2 miles
03:00
6
  <20% 74.6° 29.87 in   0% 0.2 miles
04:00
6
  <20% 74.5° 29.88 in   0% 0.2 miles
05:00
5
  <20% 74.0° 29.89 in   0% 0.2 miles
06:00
5
  <20% 73.9° 29.90 in   0% 0.2 miles
07:00
5
  <20% 74.3° 29.91 in UV
UV Index: 1
0% 0.2 miles
08:00
5
  0% 74.9° 29.92 in UV
UV Index: 2
0% 0.3 miles
09:00
5
  0% 75.1° 29.92 in UV
UV Index: 5
0% 5.9 miles
10:00
6
  <20% 75.1° 29.92 in UV
UV Index: 8
0% 9.8 miles
11:00
Heat index:101F
6
  <20% 74.7° 29.91 in UV
UV Index: 9
0% 9.9 miles
12:00
Heat index:104F
6
  <20% 74.2° 29.89 in UV
UV Index: 10
0% 10 miles
13:00
Heat index:105F
6
  <20% 73.7° 29.87 in UV
UV Index: 9
0% 10 miles
Move the mouse over the values for info.

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