Updated: June 19, 2018 4:24 pm
Next update: June 20, 2018 5:25 am

WXSIM Forecast for: O'Fallon

60% Tonight


Wednesday


50% Wednesday
night


Thursday


Thursday
night


Friday


Friday
night


Saturday


50% Saturday
night











6
7
5
5
5
10
6
4
5

Temperature/Precipitation/PressureThunder/Dewpoint/Pressure UV/Solar radiation Wind Max/min temperature
  Conditions Temperature Wind Precipitation UV Index Description and notes
Tonight
6
0.25 in
PoP: 60%
Partly cloudy in the evening, becoming cloudy after midnight. Light to moderate fog after midnight. A slight chance of rain in the evening, then a chance of rain after midnight.
Scattered thundershowers possible. Precipitation mostly around a quarter of an inch.
Wednesday
7
  UV
UV Index: 10
Partly cloudy in the morning, becoming sunny in the afternoon. Patchy light fog in the morning. Hot.
Heat index: 98°.
Wednesday night
5
0.1 in
PoP: 50%
Mostly cloudy. Light to moderate fog 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.
Thursday
5
  UV
UV Index: 10
Sunny in the morning, becoming mostly sunny in the afternoon. Light to moderate fog in the morning. Hot.
Heat index: 93°.
Thursday night
5
<0.1 in
PoP: 40%
Mostly cloudy in the evening, becoming mostly cloudy to cloudy after midnight. A chance of rain in the evening, then a slight chance of rain after midnight.
Scattered thunderstorms likely. Precipitation less than a tenth of an inch.
Friday
10
  UV
UV Index: 9
Mostly sunny in the morning, becoming partly cloudy in the afternoon.
Friday night
6
  Dense overcast in the evening, becoming mostly cloudy to cloudy after midnight.
Saturday
4
  UV
UV Index: 7
Cloudy in the morning, becoming partly cloudy in the afternoon.
Saturday night
5
0.1 in
PoP: 50%
Partly to mostly cloudy in the evening, becoming mostly cloudy after midnight. Patchy light fog after midnight. A chance of rain after midnight.
Scattered thunderstorms likely, some possibly severe. Precipitation mostly around a tenth of an inch.
Sunday
5
0.25 in
PoP: 60%
UV
UV Index: 7
Partly to mostly cloudy in the morning, becoming partly cloudy in the afternoon. Patchy light fog in the morning. Rain likely.
Hot.
Heat index: 97°. Precipitation mostly around a quarter of an inch.
Sunday night
7
  Clear in the evening, becoming fair to partly cloudy after midnight.
Monday
9
  UV
UV Index: 7
Mostly cloudy to cloudy in the morning, becoming mostly cloudy in the afternoon.
Monday night
9
  Mostly cloudy.
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 Tuesday 19 Jun
06:00
6
0.01 in 29.87 in UV
UV Index: 4
Partly cloudy.
Light rain showers.
09:00
Heat index:89F
9
  29.89 in UV
UV Index: 10
Mostly sunny.
12:00
Heat index:96F
8
  29.84 in UV
UV Index: 10
Mostly sunny.
15:00
Heat index:97F
7
  29.78 in UV
UV Index: 5
Mostly sunny.
18:00
Heat index:97F
5
  29.78 in   Partly cloudy.
21:00
5
0.02 in 29.77 in   Partly cloudy.
Light rain showers.
 05:37     20:31    Daylength: 14:54 Today
00:00
5
0.09 in 29.77 in   Partly cloudy.
Light rain showers.
03:00
5
0.01 in 29.76 in   Partly cloudy.
Light rain showers.
Moderate fog.
06:00
4
  29.77 in UV
UV Index: 4
Mostly sunny.
09:00
4
  29.79 in UV
UV Index: 10
Mostly sunny.
12:00
5
  29.76 in UV
UV Index: 10
Mostly sunny.
15:00
Heat index:92F
5
  29.69 in UV
UV Index: 5
Mostly sunny.
18:00
7
  29.69 in   Partly cloudy.
21:00
4
0.02 in 29.70 in   Mostly cloudy.
Light rain showers.
 05:37     20:32    Daylength: 14:54 Tomorrow
00:00
2
  29.67 in   Mostly cloudy.
03:00
2
0.02 in 29.63 in   Partly cloudy.
Light rain showers.
06:00
2
  29.64 in UV
UV Index: 4
Mostly sunny.
09:00
4
  29.65 in UV
UV Index: 9
Sunny.
12:00
8
  29.66 in UV
UV Index: 9
Mostly sunny.
15:00
13
0.01 in 29.65 in UV
UV Index: 5
Mostly cloudy.
Light rain showers.
18:00
9
0.01 in 29.68 in   Cloudy.
Light rain.
21:00
5
  29.72 in   Cloudy.
 05:37     20:32    Daylength: 14:54 Friday 22 Jun
00:00
6
  29.72 in   Mostly cloudy.
03:00
4
  29.73 in   Mostly cloudy.
06:00
3
  29.78 in UV
UV Index: 2
Cloudy.
09:00
3
  29.81 in UV
UV Index: 7
Cloudy.
12:00
6
  29.80 in UV
UV Index: 7
Partly cloudy.
15:00
4
  29.75 in UV
UV Index: 5
Partly cloudy.
18:00
5
  29.75 in   Mostly cloudy.
21:00
6
  29.79 in   Mostly cloudy.
 05:38     20:32    Daylength: 14:54 Saturday 23 Jun
00:00
4
0.09 in 29.79 in   Mostly cloudy.
Light rain showers.
03:00
4
0.03 in 29.79 in   Mostly cloudy.
Light rain showers.
06:00
3
0.04 in 29.81 in UV
UV Index: 3
Partly cloudy.
Light rain showers.
09:00
5
0.21 in 29.83 in UV
UV Index: 6
Mostly cloudy.
Light rain showers.
12:00
4
0.02 in 29.85 in UV
UV Index: 7
Mostly cloudy.
Light rain showers.
15:00
Heat index:97F
7
  29.82 in UV
UV Index: 5
Partly cloudy.
18:00
Heat index:97F
9
  29.86 in   Mostly sunny.
21:00
7
  29.93 in   Clear.
 05:38     20:32    Daylength: 14:54 Sunday 24 Jun
00:00
6
  29.94 in   Mostly clear.
03:00
8
  29.98 in   Mostly cloudy.
06:00
7
  30.02 in UV
UV Index: 3
Mostly cloudy.
09:00
9
  30.04 in UV
UV Index: 7
Mostly cloudy.
12:00
9
  30.06 in UV
UV Index: 7
Mostly cloudy.
15:00
11
  30.01 in UV
UV Index: 4
Partly cloudy.
18:00
9
  30.03 in   Partly cloudy.
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 Tuesday 19 Jun
05:00
6
0.01 in 20-40% 72.3° 29.87 in   40% 4.4 miles
06:00
6
  20-40% 72.6° 29.87 in UV
UV Index: 1
42% 5.9 miles
07:00
6
  20-40% 72.9° 29.88 in UV
UV Index: 2
32% 9.5 miles
08:00
7
  20-40% 73.0° 29.89 in UV
UV Index: 4
20% 11 miles
09:00
Heat index:89F
9
  20-40% 73.0° 29.89 in UV
UV Index: 7
11% 11 miles
10:00
Heat index:93F
9
  20-40% 73.1° 29.88 in UV
UV Index: 9
6% 11 miles
11:00
Heat index:94F
9
  20-40% 73.3° 29.86 in UV
UV Index: 10
5% 11 miles
12:00
Heat index:96F
8
  20-40% 73.2° 29.84 in UV
UV Index: 10
9% 12 miles
13:00
Heat index:96F
8
  40-60% 72.4° 29.81 in UV
UV Index: 9
5% 12 miles
14:00
Heat index:96F
7
  40-60% 71.2° 29.79 in UV
UV Index: 8
5% 12 miles
15:00
Heat index:97F
7
  40-60% 70.4° 29.78 in UV
UV Index: 5
12% 12 miles
16:00
Heat index:97F
6
  40-60% 70.4° 29.78 in UV
UV Index: 3
13% 12 miles
17:00
Heat index:96F
6
  40-60% 70.7° 29.78 in UV
UV Index: 1
18% 12 miles
18:00
Heat index:94F
5
  40-60% 71.1° 29.78 in   27% 12 miles
19:00
5
  40-60% 71.3° 29.78 in   32% 11 miles
20:00
5
  40-60% 71.3° 29.78 in   38% 11 miles
21:00
5
  40-60% 71.3° 29.77 in   43% 10 miles
22:00
5
0.01 in 40-60% 71.5° 29.77 in   44% 9.8 miles
23:00
5
0.01 in 40-60% 71.7° 29.77 in   45% 9.7 miles
 05:37     20:31    Daylength: 14:54 Today
00:00
5
0.02 in 40-60% 71.7° 29.77 in   45% 5.4 miles
01:00
5
0.03 in 40-60% 71.5° 29.77 in   43% 0.9 miles
02:00
5
0.04 in 40-60% 71.1° 29.77 in   39% 0.6 miles
03:00
5
0.01 in 20-40% 70.5° 29.76 in   36% 0.6 miles
04:00
5
  20-40% 70.0° 29.76 in   26% 0.9 miles
05:00
4
  <20% 69.3° 29.76 in   14% 4.6 miles
06:00
4
  <20% 68.1° 29.77 in UV
UV Index: 1
7% 10 miles
07:00
4
  <20% 68.1° 29.78 in UV
UV Index: 2
2% 10 miles
08:00
4
  <20% 68.0° 29.79 in UV
UV Index: 4
1% 10 miles
09:00
4
  20-40% 67.8° 29.79 in UV
UV Index: 6
6% 10 miles
10:00
5
  20-40% 67.6° 29.79 in UV
UV Index: 8
1% 10 miles
11:00
5
  40-60% 67.4° 29.78 in UV
UV Index: 10
1% 11 miles
12:00
5
  40-60% 67.1° 29.76 in UV
UV Index: 10
4% 11 miles
13:00
5
  40-60% 66.7° 29.73 in UV
UV Index: 9
10% 11 miles
14:00
Heat index:91F
5
  40-60% 66.1° 29.70 in UV
UV Index: 7
15% 11 miles
15:00
Heat index:92F
5
  40-60% 65.8° 29.69 in UV
UV Index: 5
19% 12 miles
16:00
6
  40-60% 65.6° 29.68 in UV
UV Index: 3
22% 12 miles
17:00
7
  40-60% 65.5° 29.69 in UV
UV Index: 1
24% 12 miles
18:00
7
  40-60% 65.8° 29.69 in   26% 10 miles
19:00
6
  40-60% 66.2° 29.70 in   28% 10 miles
20:00
5
  40-60% 66.5° 29.70 in   29% 10 miles
21:00
4
0.01 in 40-60% 66.6° 29.70 in   38% 11 miles
22:00
3
  40-60% 66.5° 29.69 in   53% 10 miles
23:00
3
0.01 in 40-60% 66.3° 29.68 in   68% 10 miles
 05:37     20:32    Daylength: 14:54 Tomorrow
00:00
2
  40-60% 66.1° 29.67 in   76% 11 miles
01:00
2
  40-60% 65.9° 29.66 in   65% 10 miles
02:00
2
  40-60% 65.5° 29.65 in   54% 10 miles
03:00
2
0.01 in 20-40% 64.9° 29.63 in   44% 9.2 miles
04:00
2
  20-40% 64.4° 29.63 in   34% 9.1 miles
Move the mouse over the values for info.

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