Updated: June 20, 2019 4:24 pm
Next update: June 21, 2019 5:25 am

WXSIM Forecast for: O'Fallon

Tonight


Friday


60% Friday
night


Saturday


Saturday
night


Sunday


Sunday
night


Monday


Monday
night











5
12
8
8
6
8
10
11
5

Temperature/Precipitation/PressureThunder/Dewpoint/Pressure UV/Solar radiation Wind Max/min temperature
  Conditions Temperature Wind Precipitation UV Index Description and notes
Tonight
5
  Fair. Moderate fog after midnight. Relatively cool.
Friday
12
<0.25 in
PoP: 60%
UV
UV Index: 6
Mostly cloudy in the morning, becoming cloudy in the afternoon. Light to moderate fog in the morning. Rain likely.
Precipitation less than a quarter of an inch.
Friday night
8
0.25 in
PoP: 60%
Mostly cloudy to cloudy in the evening, becoming partly cloudy after midnight. Moderate fog in the evening, then light to moderate fog after midnight. Rain likely.
Thunderstorms very likely, some severe. Precipitation mostly around a quarter of an inch.
Saturday
8
  UV
UV Index: 9
Partly to mostly cloudy in the morning, becoming mostly sunny in the afternoon. Patchy light fog in the morning. Hot.
Heat index: 105°.
Saturday night
6
  Clear in the evening, becoming mostly clear after midnight. Patchy light fog after midnight.
Sunday
8
  UV
UV Index: 10
Partly cloudy in the morning, becoming mostly sunny in the afternoon. Light to moderate fog in the morning. Hot.
Heat index: 102°.
Sunday night
10
  Fair in the evening, becoming partly to mostly cloudy after midnight.
Monday
11
  UV
UV Index: 10
Partly cloudy in the morning, becoming sunny in the afternoon. Breezy.
Monday night
5
  Clear. Patchy light fog after midnight.
Tuesday
4
  UV
UV Index: 10
Sunny. Patchy light fog in the morning. Hot.
Heat index: 97°.
Tuesday night
4
  Fair to partly cloudy in the evening, becoming clear after midnight. Patchy light fog in the evening, then moderate to dense fog after midnight.
Wednesday
4
  UV
UV Index: 10
Sunny in the morning, becoming mostly sunny in the afternoon. Moderate fog in the morning. Hot.
Heat index: 104°.
Wednesday night
4
0.1 in
PoP: 40%
Partly to mostly cloudy in the evening, becoming mostly cloudy after midnight. A slight chance of rain in the evening, then a chance of rain after midnight.
Scattered thunderstorms likely. 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
 05:37     20:31    Daylength: 14:54 Today
21:00
4
  29.83 in   Partly cloudy.
 05:37     20:32    Daylength: 14:54 Tomorrow
00:00
5
  29.85 in   Partly cloudy.
Moderate fog.
03:00
6
  29.84 in   Mostly clear.
Moderate fog.
06:00
9
  29.85 in UV
UV Index: 3
Mostly cloudy.
09:00
8
0.11 in 29.89 in UV
UV Index: 6
Mostly cloudy.
Light rain showers.
12:00
11
0.03 in 29.86 in UV
UV Index: 6
Mostly cloudy.
Light rain showers.
15:00
13
0.09 in 29.80 in UV
UV Index: 2
Cloudy.
Light rain.
18:00
10
0.16 in 29.79 in   Cloudy.
Light rain.
21:00
7
  29.79 in   Mostly cloudy.
Moderate fog.
 05:37     20:32    Daylength: 14:54 Saturday 22 Jun
00:00
4
0.04 in 29.81 in   Mostly cloudy.
Light rain showers.
03:00
4
  29.82 in   Partly cloudy.
Moderate fog.
06:00
6
  29.87 in UV
UV Index: 3
Mostly cloudy.
09:00
Heat index:88F
8
  29.93 in UV
UV Index: 9
Mostly cloudy.
12:00
Heat index:99F
10
  29.90 in UV
UV Index: 9
Partly cloudy.
15:00
Heat index:104F
9
  29.85 in UV
UV Index: 5
Sunny.
18:00
Heat index:104F
6
  29.85 in   Sunny.
21:00
Heat index:98F
5
  29.86 in   Clear.
 05:38     20:32    Daylength: 14:54 Sunday 23 Jun
00:00
7
  29.87 in   Mostly clear.
03:00
6
  29.88 in   Mostly clear.
Moderate fog.
06:00
7
  29.88 in UV
UV Index: 3
Mostly sunny.
Light fog.
09:00
9
  29.86 in UV
UV Index: 10
Mostly sunny.
12:00
Heat index:95F
10
  29.86 in UV
UV Index: 10
Mostly sunny.
15:00
Heat index:97F
8
  29.81 in UV
UV Index: 5
Mostly sunny.
18:00
Heat index:97F
6
  29.76 in   Mostly sunny.
21:00
7
  29.75 in   Mostly clear.
 05:38     20:32    Daylength: 14:54 Monday 24 Jun
00:00
13
  29.75 in   Mostly clear.
03:00
9
  29.72 in   Mostly clear.
06:00
7
  29.74 in UV
UV Index: 3
Mostly cloudy.
09:00
12
  29.78 in UV
UV Index: 10
Mostly cloudy.
12:00
15
  29.79 in UV
UV Index: 10
Mostly sunny.
15:00
12
  29.77 in UV
UV Index: 5
Sunny.
18:00
7
  29.80 in   Sunny.
21:00
4
  29.85 in   Clear.
 05:38     20:32    Daylength: 14:53 Tuesday 25 Jun
00:00
4
  29.87 in   Clear.
03:00
4
  29.89 in   Clear.
Light fog.
06:00
3
  29.93 in UV
UV Index: 4
Sunny.
Light fog.
09:00
5
  29.95 in UV
UV Index: 10
Sunny.
12:00
5
  29.94 in UV
UV Index: 10
Sunny.
15:00
Heat index:94F
4
  29.92 in UV
UV Index: 5
Sunny.
18:00
Heat index:94F
2
  29.92 in   Mostly sunny.
21:00
4
  29.95 in   Mostly clear.
Light fog.
 05:39     20:32    Daylength: 14:53 Wednesday 26 Jun
00:00
6
  29.97 in   Clear.
Moderate fog.
03:00
5
  30.01 in   Clear.
Moderate fog.
06:00
3
  30.04 in UV
UV Index: 4
Sunny.
Moderate fog.
09:00
4
  30.06 in UV
UV Index: 10
Sunny.
12:00
Heat index:99F
5
  30.05 in UV
UV Index: 10
Sunny.
15:00
Heat index:101F
6
  30.04 in UV
UV Index: 5
Sunny.
18:00
Heat index:101F
2
  30.02 in   Mostly sunny.
Move the mouse over the values for info.
  Conditions Temperature Wind Precipitation Thunderstorm probability Dewpoint Pressure UV Index Cloud cover Visibility
 05:37     20:31    Daylength: 14:54 Today
19:00
3
  <20% 63.9° 29.81 in   14% 13 miles
20:00
3
  <20% 63.8° 29.82 in   13% 13 miles
21:00
4
  0% 63.4° 29.83 in   15% 12 miles
22:00
4
  0% 63.0° 29.84 in   23% 12 miles
23:00
4
  0% 62.5° 29.84 in   30% 11 miles
 05:37     20:32    Daylength: 14:54 Tomorrow
00:00
5
  0% 62.1° 29.85 in   34% 6.9 miles
01:00
5
  0% 61.8° 29.86 in   24% 2.5 miles
02:00
6
  0% 61.7° 29.85 in   13% 0.8 miles
03:00
6
  0% 61.6° 29.84 in   6% 0.6 miles
04:00
7
  <20% 61.5° 29.83 in   3% 0.6 miles
05:00
7
  <20% 61.8° 29.84 in   5% 10 miles
06:00
9
  <20% 63.7° 29.85 in UV
UV Index: 1
21% 13 miles
07:00
9
  20-40% 65.6° 29.87 in UV
UV Index: 2
44% 13 miles
08:00
9
  40-60% 66.8° 29.88 in UV
UV Index: 3
71% 13 miles
09:00
8
0.03 in 40-60% 67.6° 29.89 in UV
UV Index: 3
84% 8.7 miles
10:00
8
0.04 in 40-60% 68.7° 29.88 in UV
UV Index: 5
82% 8.6 miles
11:00
10
0.04 in 40-60% 69.5° 29.87 in UV
UV Index: 6
79% 8.5 miles
12:00
11
0.01 in 20-40% 70.1° 29.86 in UV
UV Index: 6
78% 11 miles
13:00
12
0.01 in 40-60% 70.4° 29.83 in UV
UV Index: 5
86% 11 miles
14:00
13
0.01 in 60-80% 70.7° 29.81 in UV
UV Index: 4
95% 11 miles
15:00
13
0.03 in &ht;80% 71.1° 29.80 in UV
UV Index: 2
100% 9.2 miles
16:00
12
0.03 in &ht;80% 71.0° 29.79 in UV
UV Index: 1
100% 9.1 miles
17:00
11
0.03 in &ht;80% 70.8° 29.79 in UV
UV Index: 1
100% 9.0 miles
18:00
10
0.05 in &ht;80% 70.5° 29.79 in   100% 7.5 miles
19:00
8
0.06 in &ht;80% 71.2° 29.79 in   79% 4.8 miles
20:00
8
0.05 in 60-80% 72.2° 29.79 in   57% 1.3 miles
21:00
7
  40-60% 72.8° 29.79 in   38% 0.6 miles
22:00
6
  40-60% 72.5° 29.79 in   47% 0.9 miles
23:00
5
  60-80% 71.9° 29.80 in   57% 1.9 miles
 05:37     20:32    Daylength: 14:54 Saturday 22 Jun
00:00
4
0.01 in 60-80% 71.3° 29.81 in   62% 8.3 miles
01:00
4
0.02 in 60-80% 71.0° 29.81 in   55% 5.7 miles
02:00
4
0.01 in 40-60% 70.8° 29.82 in   46% 2.7 miles
03:00
4
  40-60% 70.6° 29.82 in   38% 1.7 miles
04:00
5
  40-60% 69.9° 29.83 in   33% 3.0 miles
05:00
5
  20-40% 69.5° 29.84 in   29% 8.7 miles
06:00
6
  20-40% 70.7° 29.87 in UV
UV Index: 1
36% 11 miles
07:00
7
  40-60% 72.3° 29.89 in UV
UV Index: 2
55% 11 miles
08:00
7
  60-80% 73.7° 29.92 in UV
UV Index: 3
76% 11 miles
09:00
Heat index:88F
8
  &ht;80% 74.4° 29.93 in UV
UV Index: 4
86% 11 miles
10:00
Heat index:91F
9
  &ht;80% 74.9° 29.93 in UV
UV Index: 7
70% 11 miles
11:00
Heat index:95F
9
  60-80% 75.1° 29.92 in UV
UV Index: 9
52% 11 miles
12:00
Heat index:99F
10
  20-40% 75.2° 29.90 in UV
UV Index: 9
31% 12 miles
13:00
Heat index:102F
10
  40-60% 75.4° 29.87 in UV
UV Index: 9
21% 12 miles
14:00
Heat index:103F
10
  40-60% 75.4° 29.86 in UV
UV Index: 8
11% 12 miles
15:00
Heat index:104F
9
  40-60% 75.6° 29.85 in UV
UV Index: 5
0% 12 miles
16:00
Heat index:104F
9
  40-60% 75.3° 29.85 in UV
UV Index: 3
0% 12 miles
17:00
Heat index:104F
7
  40-60% 74.9° 29.85 in UV
UV Index: 1
0% 12 miles
18:00
Heat index:102F
6
  40-60% 74.3° 29.85 in   0% 12 miles
Move the mouse over the values for info.

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