Updated: June 19, 2019 4:24 pm
Next update: June 20, 2019 5:25 am

WXSIM Forecast for: O'Fallon

Tonight


Thursday


Thursday
night


40% Friday


Friday
night


Saturday


Saturday
night


50% Sunday


Sunday
night











8
6
4
8
6
8
7
10
12

Temperature/Precipitation/PressureThunder/Dewpoint/Pressure UV/Solar radiation Wind Max/min temperature
  Conditions Temperature Wind Precipitation UV Index Description and notes
Tonight
8
<0.1 in
PoP: 40%
Partly to mostly cloudy in the evening, becoming mostly cloudy after midnight. Patchy light fog in the evening, then light to moderate fog after midnight. A chance of rain. Precipitation showery or intermittent. Precipitation less than a tenth of an inch.
Thursday
6
  UV
UV Index: 6
Cloudy in the morning, becoming mostly cloudy in the afternoon.
Thursday night
4
  Clear. Light to moderate fog after midnight. Relatively cool.
Friday
8
0.1 in
PoP: 40%
UV
UV Index: 8
Mostly sunny in the morning, becoming mostly cloudy in the afternoon. Patchy light fog in the morning. A chance of rain in the afternoon.

Heat index: 93°. Precipitation mostly around a tenth of an inch.
Friday night
6
  Partly to mostly cloudy in the evening, becoming clear after midnight.
Saturday
8
  UV
UV Index: 10
Sunny. Hot.
Heat index: 104°.
Saturday night
7
  Clear in the evening, becoming fair to partly cloudy after midnight. Warm.
Sunday
10
0.1 in
PoP: 50%
UV
UV Index: 7
Mostly cloudy. A slight chance of rain in the morning, then a chance of rain in the afternoon.
Scattered thunderstorms likely, some possibly severe. Hot.
Heat index: 100°. Precipitation mostly around a tenth of an inch.
Sunday night
12
<0.25 in
PoP: 60%
Partly to mostly cloudy in the evening, becoming mostly cloudy after midnight. Rain likely.
Precipitation less than a quarter of an inch.
Monday
12
  UV
UV Index: 10
Partly cloudy in the morning, becoming mostly sunny in the afternoon. Breezy.
Monday night
4
  Clear. Patchy light fog after midnight. Relatively cool.
Tuesday
5
  UV
UV Index: 10
Sunny. Patchy light fog in the morning. Hot.
Heat index: 96°.
Tuesday night
5
  Clear. Moderate fog after midnight.
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
03:00
9
  29.60 in   Mostly cloudy.
06:00
8
  29.64 in UV
UV Index: 2
Cloudy.
09:00
6
  29.73 in UV
UV Index: 6
Cloudy.
12:00
5
  29.75 in UV
UV Index: 6
Mostly cloudy.
15:00
5
  29.73 in UV
UV Index: 4
Mostly cloudy.
18:00
3
  29.77 in   Mostly sunny.
21:00
3
  29.80 in   Clear.
Light fog.
 05:37     20:32    Daylength: 14:54 Tomorrow
00:00
5
  29.83 in   Mostly clear.
Moderate fog.
03:00
6
  29.84 in   Mostly clear.
Moderate fog.
06:00
8
  29.85 in UV
UV Index: 4
Mostly sunny.
09:00
Heat index:87F
9
  29.88 in UV
UV Index: 8
Partly cloudy.
12:00
Heat index:93F
5
0.07 in 29.85 in UV
UV Index: 8
Mostly cloudy.
Light rain showers.
15:00
Heat index:92F
10
0.02 in 29.80 in UV
UV Index: 4
Mostly cloudy.
Light rain showers.
18:00
Heat index:92F
7
  29.79 in   Cloudy.
21:00
7
  29.82 in   Mostly clear.
 05:37     20:32    Daylength: 14:54 Saturday 22 Jun
00:00
6
  29.83 in   Clear.
03:00
3
  29.88 in   Clear.
06:00
7
  29.92 in UV
UV Index: 4
Mostly sunny.
09:00
Heat index:90F
8
  29.94 in UV
UV Index: 10
Mostly sunny.
12:00
Heat index:100F
9
  29.92 in UV
UV Index: 10
Sunny.
15:00
Heat index:101F
9
  29.88 in UV
UV Index: 5
Sunny.
18:00
Heat index:100F
6
  29.86 in   Sunny.
21:00
Heat index:94F
7
  29.86 in   Clear.
 05:38     20:32    Daylength: 14:54 Sunday 23 Jun
00:00
7
  29.88 in   Mostly clear.
03:00
7
  29.87 in   Partly cloudy.
06:00
7
0.01 in 29.88 in UV
UV Index: 3
Partly cloudy.
Light rain showers.
09:00
11
  29.86 in UV
UV Index: 7
Mostly cloudy.
12:00
Heat index:95F
13
0.09 in 29.84 in UV
UV Index: 7
Mostly cloudy.
Light rain showers.
15:00
Heat index:93F
10
0.01 in 29.78 in UV
UV Index: 4
Partly cloudy.
Light rain showers.
18:00
Heat index:93F
7
  29.77 in   Mostly cloudy.
21:00
8
0.19 in 29.75 in   Mostly cloudy.
Light rain showers.
 05:38     20:32    Daylength: 14:54 Monday 24 Jun
00:00
14
  29.76 in   Partly cloudy.
03:00
12
  29.75 in   Mostly cloudy.
06:00
7
  29.76 in UV
UV Index: 4
Mostly sunny.
09:00
12
  29.77 in UV
UV Index: 10
Partly cloudy.
12:00
15
  29.79 in UV
UV Index: 10
Mostly sunny.
15:00
12
  29.78 in UV
UV Index: 5
Mostly sunny.
18:00
6
  29.80 in   Sunny.
21:00
3
  29.85 in   Clear.
 05:38     20:32    Daylength: 14:53 Tuesday 25 Jun
00:00
4
  29.87 in   Clear.
Light fog.
03:00
4
  29.89 in   Clear.
Light fog.
06:00
4
  29.93 in UV
UV Index: 4
Sunny.
09:00
6
  29.95 in UV
UV Index: 10
Sunny.
12:00
5
  29.93 in UV
UV Index: 10
Sunny.
15:00
Heat index:95F
4
  29.90 in UV
UV Index: 5
Sunny.
18:00
Heat index:95F
3
  29.90 in   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 Wednesday 19 Jun
03:00
9
  20-40% 63.4° 29.60 in   94% 2.4 miles
04:00
9
  <20% 62.6° 29.60 in   93% 3.1 miles
05:00
9
  <20% 62.0° 29.62 in   89% 12 miles
06:00
8
  <20% 62.1° 29.64 in   87% 14 miles
07:00
8
  <20% 62.0° 29.68 in UV
UV Index: 1
92% 15 miles
08:00
7
  <20% 61.8° 29.71 in UV
UV Index: 2
97% 15 miles
09:00
6
  <20% 61.5° 29.73 in UV
UV Index: 3
100% 15 miles
10:00
6
  <20% 61.8° 29.75 in UV
UV Index: 5
96% 15 miles
11:00
6
  <20% 62.1° 29.75 in UV
UV Index: 6
92% 15 miles
12:00
5
  <20% 62.5° 29.75 in UV
UV Index: 6
88% 14 miles
13:00
5
  <20% 62.7° 29.74 in UV
UV Index: 6
83% 14 miles
14:00
5
  <20% 62.9° 29.73 in UV
UV Index: 5
78% 14 miles
15:00
5
  <20% 63.3° 29.73 in UV
UV Index: 4
74% 14 miles
16:00
5
  0% 63.4° 29.75 in UV
UV Index: 2
53% 14 miles
17:00
4
  0% 63.5° 29.76 in UV
UV Index: 1
31% 14 miles
18:00
3
  0% 63.2° 29.77 in   9% 14 miles
19:00
2
  0% 63.3° 29.78 in   6% 13 miles
20:00
2
  0% 63.5° 29.79 in   4% 13 miles
21:00
3
  0% 63.4° 29.80 in   3% 12 miles
22:00
4
  0% 63.1° 29.81 in   4% 8.0 miles
23:00
5
  0% 62.5° 29.82 in   5% 5.3 miles
 05:37     20:31    Daylength: 14:54 Today
00:00
5
  0% 62.1° 29.83 in   6% 3.8 miles
01:00
6
  0% 61.7° 29.84 in   7% 2.4 miles
02:00
6
  0% 61.5° 29.84 in   7% 1.4 miles
03:00
6
  0% 61.4° 29.84 in   11% 1.4 miles
04:00
6
  0% 61.3° 29.84 in   6% 1.4 miles
05:00
7
  0% 61.5° 29.84 in   5% 13 miles
06:00
8
  <20% 63.8° 29.85 in UV
UV Index: 1
10% 14 miles
07:00
9
  <20% 66.5° 29.86 in UV
UV Index: 2
11% 14 miles
08:00
9
  20-40% 68.6° 29.87 in UV
UV Index: 4
17% 14 miles
09:00
Heat index:87F
9
  20-40% 70.1° 29.88 in UV
UV Index: 6
27% 14 miles
10:00
Heat index:89F
9
  40-60% 71.3° 29.88 in UV
UV Index: 8
34% 14 miles
11:00
Heat index:91F
7
  60-80% 72.1° 29.87 in UV
UV Index: 8
44% 13 miles
12:00
Heat index:93F
5
0.02 in &ht;80% 72.8° 29.85 in UV
UV Index: 8
50% 9.5 miles
13:00
Heat index:92F
5
0.03 in 60-80% 73.3° 29.83 in UV
UV Index: 7
52% 9.3 miles
14:00
Heat index:91F
8
0.02 in 60-80% 73.4° 29.81 in UV
UV Index: 5
55% 9.3 miles
15:00
Heat index:90F
10
0.01 in 60-80% 73.7° 29.80 in UV
UV Index: 4
63% 11 miles
16:00
Heat index:91F
10
0.01 in &ht;80% 73.5° 29.79 in UV
UV Index: 2
78% 12 miles
17:00
Heat index:92F
9
  &ht;80% 73.5° 29.79 in UV
UV Index: 1
93% 11 miles
18:00
Heat index:91F
7
  ~100% 73.2° 29.79 in   100% 12 miles
19:00
Heat index:90F
7
  &ht;80% 73.5° 29.80 in   69% 12 miles
20:00
Heat index:88F
7
  60-80% 73.8° 29.81 in   38% 12 miles
21:00
7
  40-60% 73.7° 29.82 in   7% 12 miles
22:00
6
  20-40% 73.3° 29.83 in   5% 12 miles
23:00
6
  20-40% 72.6° 29.83 in   3% 12 miles
 05:37     20:32    Daylength: 14:54 Tomorrow
00:00
6
  20-40% 71.8° 29.83 in   1% 12 miles
01:00
5
  20-40% 71.1° 29.85 in   1% 11 miles
02:00
4
  20-40% 70.5° 29.86 in   1% 11 miles
Move the mouse over the values for info.

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