Updated: May 20, 2018 4:25 pm
Next update: May 21, 2018 4:25 pm

WXSIM Forecast for: O'Fallon

40% Today


60% Tonight


Monday


Monday
night


Tuesday


Tuesday
night


Wednesday


Wednesday
night


Thursday











6
3
4
5
6
5
6
5
7

Temperature/Precipitation/PressureThunder/Dewpoint/Pressure UV/Solar radiation Wind Max/min temperature
  Conditions Temperature Wind Precipitation UV Index Description and notes
Today
6
0.1 in
PoP: 40%
UV
UV Index: 6
Mostly cloudy in the morning, becoming cloudy in the afternoon. Patchy light fog in the morning. A chance of rain in the morning, then a slight chance of rain in the afternoon.
Thunderstorms very likely, some severe. Hot. Precipitation mostly around a tenth of an inch.
Tonight
3
0.25 in
PoP: 60%
Cloudy. Rain likely.
Precipitation mostly around a quarter of an inch.
Monday
4
<0.1 in
PoP: 40%
UV
UV Index: 6
Mostly cloudy to cloudy in the morning, becoming partly to mostly cloudy in the afternoon. A chance of rain in the morning, then a slight chance of rain in the afternoon.
Scattered thunderstorms likely, some possibly severe. Warm. Precipitation less than a tenth of an inch.
Monday night
5
  Mostly clear in the evening, becoming clear after midnight. Patchy light fog after midnight.
Tuesday
6
  UV
UV Index: 8
Partly to mostly sunny in the morning, becoming mostly sunny in the afternoon. Warm.
Tuesday night
5
  Mostly clear.
Wednesday
6
  UV
UV Index: 5
Partly to mostly cloudy in the morning, becoming cloudy in the afternoon. Hot.
Wednesday night
5
  Cloudy in the evening, becoming mostly cloudy after midnight.
Thursday
7
  UV
UV Index: 8
Partly cloudy in the morning, becoming partly to mostly sunny in the afternoon. Hot.
Thursday night
6
  Partly cloudy in the evening, becoming partly to mostly cloudy after midnight.
Friday
6
  UV
UV Index: 9
Partly to mostly sunny in the morning, becoming partly cloudy in the afternoon. Unusually hot.
Friday night
6
0.1 in
PoP: 40%
Partly cloudy in the evening, becoming partly to mostly cloudy after midnight. Patchy light fog after midnight. A slight chance of rain in the evening, then a chance of rain after midnight.
Precipitation mostly around a tenth of an inch.
Saturday
8
<0.25 in
PoP: 50%
UV
UV Index: 9
Partly cloudy in the morning, becoming mostly cloudy in the afternoon. Light to moderate fog in the morning. A slight chance of rain in the morning, then a chance of rain in the afternoon.
Unusually hot. Precipitation less than a quarter of an inch.
Saturday night
6
  Partly to mostly cloudy.
Move the mouse over the values for info.
  Conditions Temperature Wind Precipitation Pressure UV Index Description and notes
 05:45     20:13    Daylength: 14:28 Sunday 20 May
06:00
3
  30.03 in UV
UV Index: 3
Mostly sunny.
09:00
4
0.01 in 30.07 in UV
UV Index: 6
Mostly cloudy.
Light rain showers.
12:00
4
  30.03 in UV
UV Index: 5
Mostly cloudy.
15:00
Heat index:85F
6
  29.98 in UV
UV Index: 4
Mostly cloudy.
18:00
5
  29.98 in   Partly cloudy.
21:00
4
  29.99 in   Clear.
 05:44     20:14    Daylength: 14:30 Today
00:00
4
  30.00 in   Clear.
Light fog.
03:00
5
  29.99 in   Mostly clear.
Light fog.
06:00
4
  30.03 in UV
UV Index: 3
Partly cloudy.
09:00
5
  30.04 in UV
UV Index: 8
Partly cloudy.
12:00
7
  30.03 in UV
UV Index: 9
Mostly sunny.
15:00
Heat index:86F
6
  29.96 in UV
UV Index: 4
Mostly sunny.
18:00
5
  29.96 in   Mostly sunny.
21:00
5
  30.01 in   Mostly clear.
 05:43     20:15    Daylength: 14:31 Tomorrow
00:00
4
  30.02 in   Mostly clear.
03:00
5
  30.01 in   Partly cloudy.
06:00
4
  30.05 in UV
UV Index: 2
Mostly cloudy.
09:00
6
  30.08 in UV
UV Index: 5
Mostly cloudy.
12:00
6
  30.05 in UV
UV Index: 5
Cloudy.
15:00
Heat index:88F
7
  30.00 in UV
UV Index: 2
Cloudy.
18:00
Heat index:88F
6
  30.02 in   Cloudy.
21:00
5
  30.07 in   Cloudy.
 05:43     20:16    Daylength: 14:33 Wednesday 23 May
00:00
5
  30.08 in   Partly cloudy.
03:00
5
  30.08 in   Partly cloudy.
06:00
5
  30.12 in UV
UV Index: 3
Mostly sunny.
09:00
8
  30.13 in UV
UV Index: 8
Sunny.
12:00
7
  30.08 in UV
UV Index: 8
Mostly sunny.
15:00
Heat index:89F
8
  30.02 in UV
UV Index: 4
Mostly sunny.
18:00
Heat index:89F
7
  30.00 in   Partly cloudy.
21:00
6
  30.03 in   Partly cloudy.
 05:42     20:17    Daylength: 14:34 Thursday 24 May
00:00
6
  30.03 in   Partly cloudy.
03:00
5
  29.99 in   Partly cloudy.
06:00
5
  29.99 in UV
UV Index: 4
Mostly sunny.
09:00
7
  29.96 in UV
UV Index: 9
Mostly sunny.
12:00
Heat index:90F
6
  29.90 in UV
UV Index: 9
Mostly cloudy.
15:00
Heat index:92F
5
  29.84 in UV
UV Index: 3
Mostly cloudy.
18:00
Heat index:92F
6
  29.79 in   Partly cloudy.
21:00
7
  29.79 in   Partly cloudy.
 05:41     20:17    Daylength: 14:36 Friday 25 May
00:00
6
  29.76 in   Partly cloudy.
03:00
6
  29.76 in   Mostly clear.
Moderate fog.
06:00
6
  29.75 in UV
UV Index: 4
Mostly sunny.
Light fog.
09:00
9
  29.72 in UV
UV Index: 9
Partly cloudy.
12:00
Heat index:93F
9
0.11 in 29.68 in UV
UV Index: 8
Partly cloudy.
Light rain showers.
15:00
9
  29.66 in UV
UV Index: 3
Mostly sunny.
18:00
6
  29.66 in   Mostly sunny.
Move the mouse over the values for info.
  Conditions Temperature Wind Precipitation Thunderstorm probability Dewpoint Pressure UV Index Cloud cover Visibility
 05:45     20:13    Daylength: 14:28 Sunday 20 May
06:00
3
  20-40% 63.4° 30.03 in   23% 9.6 miles
07:00
3
  20-40% 64.0° 30.05 in UV
UV Index: 1
21% 9.6 miles
08:00
3
  20-40% 64.8° 30.06 in UV
UV Index: 3
20% 9.6 miles
09:00
4
  20-40% 65.3° 30.07 in UV
UV Index: 5
32% 9.9 miles
10:00
4
0.01 in 40-60% 65.1° 30.06 in UV
UV Index: 6
54% 10 miles
11:00
4
  60-80% 64.4° 30.05 in UV
UV Index: 6
79% 10 miles
12:00
4
  &ht;80% 63.7° 30.03 in UV
UV Index: 5
92% 11 miles
13:00
Heat index:84F
5
  &ht;80% 63.4° 30.00 in UV
UV Index: 5
81% 11 miles
14:00
Heat index:85F
5
  60-80% 63.3° 29.99 in UV
UV Index: 5
66% 11 miles
15:00
Heat index:85F
6
  40-60% 63.4° 29.98 in UV
UV Index: 4
52% 12 miles
16:00
Heat index:86F
6
  40-60% 63.6° 29.98 in UV
UV Index: 2
43% 12 miles
17:00
Heat index:85F
5
  40-60% 63.9° 29.98 in UV
UV Index: 1
34% 12 miles
18:00
5
  20-40% 64.0° 29.98 in   26% 12 miles
19:00
4
  20-40% 63.8° 29.98 in   18% 12 miles
20:00
4
  20-40% 63.5° 29.99 in   11% 12 miles
21:00
4
  <20% 63.2° 29.99 in   4% 12 miles
22:00
5
  <20% 62.9° 29.99 in   2% 12 miles
23:00
5
  <20% 62.5° 30.00 in   2% 12 miles
 05:44     20:14    Daylength: 14:30 Today
00:00
4
  <20% 62.1° 30.00 in   1% 9.3 miles
01:00
5
  <20% 61.6° 30.00 in   1% 6.5 miles
02:00
5
  <20% 60.9° 30.00 in   1% 4.2 miles
03:00
5
  <20% 60.3° 29.99 in   5% 4.3 miles
04:00
5
  <20% 59.6° 29.99 in   15% 6.4 miles
05:00
4
  <20% 59.0° 30.01 in   24% 12 miles
06:00
4
  20-40% 60.3° 30.03 in UV
UV Index: 1
32% 12 miles
07:00
5
  20-40% 61.4° 30.04 in UV
UV Index: 1
36% 12 miles
08:00
5
  20-40% 62.5° 30.04 in UV
UV Index: 3
41% 12 miles
09:00
5
  20-40% 63.3° 30.04 in UV
UV Index: 5
44% 12 miles
10:00
5
  20-40% 63.7° 30.05 in UV
UV Index: 7
36% 12 miles
11:00
6
  20-40% 63.6° 30.04 in UV
UV Index: 8
29% 12 miles
12:00
7
  20-40% 63.4° 30.03 in UV
UV Index: 9
22% 13 miles
13:00
Heat index:85F
7
  20-40% 63.1° 30.00 in UV
UV Index: 8
22% 13 miles
14:00
Heat index:86F
7
  20-40% 62.6° 29.97 in UV
UV Index: 6
21% 13 miles
15:00
Heat index:86F
6
  20-40% 62.3° 29.96 in UV
UV Index: 4
21% 13 miles
16:00
Heat index:85F
6
  20-40% 62.5° 29.95 in UV
UV Index: 2
18% 13 miles
17:00
6
  20-40% 62.8° 29.96 in UV
UV Index: 1
15% 13 miles
18:00
5
  20-40% 62.7° 29.96 in   12% 13 miles
19:00
5
  20-40% 62.0° 29.98 in   11% 13 miles
20:00
5
  <20% 60.9° 29.99 in   10% 13 miles
21:00
5
  20-40% 60.2° 30.01 in   9% 13 miles
22:00
5
  20-40% 60.0° 30.01 in   8% 12 miles
23:00
5
  20-40% 60.0° 30.01 in   7% 12 miles
 05:43     20:15    Daylength: 14:31 Tomorrow
00:00
4
  20-40% 59.9° 30.02 in   6% 12 miles
01:00
4
  20-40% 59.6° 30.02 in   7% 12 miles
02:00
5
  20-40% 59.3° 30.02 in   8% 12 miles
03:00
5
  20-40% 59.0° 30.01 in   13% 12 miles
04:00
4
  20-40% 58.7° 30.02 in   21% 12 miles
05:00
4
  20-40% 58.4° 30.03 in   29% 12 miles
Move the mouse over the values for info.

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