10-Day Weather Forecast for O'Fallon, Missouri - The Weather Channel | weather.com
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10 Day Weather-

As of 1:26 pm CDT
alertLevel3

Wind Advisory

alertLevel3

There is a possible risk of severe weather today. Wind, tornadoes and hail are possible. Look out for powerful tornadoes.

Today

Thunderstorms Thunderstorms/Wind
76°/60°
Rain drop 63%
Subtract

Day

76°
Thunderstorms
Rain drop
63%
SSW 22 mph

Windy with showers and thunderstorms likely. A few storms may be severe. High 76F. Winds SSW at 20 to 30 mph. Chance of rain 60%.

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  • Humidity
    Humidity61%
  • UV index
    UV Index4 of 11
  • Sunrise
    Sunrise6:46 am
  • Sunset
    Sunset7:27 pm

Night

60°
Showers
Rain drop
38%
SW 16 mph

Overcast with rain showers at times. Low near 60F. SW winds at 10 to 20 mph, decreasing to less than 5 mph. Chance of rain 40%.

  • Humidity
    Humidity76%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise8:26 pm
  • Moonset
    Moonset6:46 am
  • Moon Phase - Day 15 Full Moon

Fri 03

Mostly Cloudy Day Mostly Cloudy
82°/55°
Rain drop 15%
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Day

82°
Mostly Cloudy Day
Rain drop
15%
S 15 mph

Mostly cloudy. High 82F. Winds S at 10 to 20 mph.

  • Humidity
    Humidity68%
  • UV index
    UV Index5 of 11
  • Sunrise
    Sunrise6:44 am
  • Sunset
    Sunset7:28 pm

Night

55°
Scattered Showers Night
Rain drop
69%
SSW 12 mph

Showers developing after midnight with the possibility of a thunderstorm. Gusty winds and small hail are possible. Low near 55F. Winds SSW at 10 to 15 mph. Chance of rain 70%.

  • Humidity
    Humidity75%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise9:28 pm
  • Moonset
    Moonset7:10 am
  • Moon Phase - Day 16 Waning Gibbous

Sat 04

Scattered Showers Day AM Showers
59°/38°
Rain drop 59%
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Day

59°
Scattered Showers Day
Rain drop
59%
WNW 16 mph

Showers in the morning, then cloudy in the afternoon. High 59F. Winds WNW at 10 to 20 mph. Chance of rain 60%.

  • Humidity
    Humidity70%
  • UV index
    UV Index4 of 11
  • Sunrise
    Sunrise6:42 am
  • Sunset
    Sunset7:29 pm

Night

38°
Mostly Clear Night
Mixed precipitation
3%
NW 13 mph

Mostly clear. Low 38F. Winds NW at 10 to 15 mph.

  • Humidity
    Humidity64%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise10:32 pm
  • Moonset
    Moonset7:36 am
  • Moon Phase - Day 17 Waning Gibbous

Sun 05

Sunny Sunny
61°/38°
Rain drop 4%
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Day

61°
Sunny
Rain drop
4%
NW 12 mph

Sunny. High 61F. Winds NW at 10 to 15 mph.

  • Humidity
    Humidity51%
  • UV index
    UV Index6 of 11
  • Sunrise
    Sunrise6:41 am
  • Sunset
    Sunset7:30 pm

Night

38°
Clear Night
Mixed precipitation
5%
WNW 7 mph

Clear skies. Low 38F. Winds WNW at 5 to 10 mph.

  • Humidity
    Humidity67%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise11:34 pm
  • Moonset
    Moonset8:08 am
  • Moon Phase - Day 18 Waning Gibbous

Mon 06

Mostly Clear Day Mostly Sunny
65°/37°
Rain drop 5%
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Day

65°
Mostly Clear Day
Rain drop
5%
NW 10 mph

Except for a few afternoon clouds, mainly sunny. High near 65F. Winds NW at 10 to 15 mph.

  • Humidity
    Humidity49%
  • UV index
    UV Index7 of 11
  • Sunrise
    Sunrise6:39 am
  • Sunset
    Sunset7:31 pm

Night

37°
Mostly Cloudy Night
Mixed precipitation
18%
N 7 mph

Mainly cloudy. Low 37F. Winds N at 5 to 10 mph.

  • Humidity
    Humidity56%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise--
  • Moonset
    Moonset8:45 am
  • Moon Phase - Day 19 Waning Gibbous

Tue 07

Partly Cloudy Day Partly Cloudy
54°/42°
Rain drop 9%
Add

Day

54°
Partly Cloudy Day
Rain drop
9%
E 8 mph

Intervals of clouds and sunshine. High 54F. Winds E at 5 to 10 mph.

  • Humidity
    Humidity50%
  • UV index
    UV Index7 of 11
  • Sunrise
    Sunrise6:38 am
  • Sunset
    Sunset7:32 pm

Night

42°
Partly Cloudy Night
Rain drop
1%
SE 8 mph

A few clouds from time to time. Low 42F. Winds SE at 5 to 10 mph.

  • Humidity
    Humidity56%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise12:34 am
  • Moonset
    Moonset9:28 am
  • Moon Phase - Day 20 Waning Gibbous

Wed 08

Partly Cloudy Day Partly Cloudy
75°/53°
Rain drop 1%
Add

Day

75°
Partly Cloudy Day
Rain drop
1%
S 14 mph

Partly cloudy skies. High near 75F. Winds S at 10 to 20 mph.

  • Humidity
    Humidity44%
  • UV index
    UV Index6 of 11
  • Sunrise
    Sunrise6:36 am
  • Sunset
    Sunset7:32 pm

Night

53°
Partly Cloudy Night
Rain drop
10%
SSW 11 mph

Partly cloudy skies. Low 53F. Winds SSW at 10 to 15 mph.

  • Humidity
    Humidity52%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise1:27 am
  • Moonset
    Moonset10:20 am
  • Moon Phase - Day 21 Waning Gibbous

Thu 09

Partly Cloudy Day Partly Cloudy
80°/57°
Rain drop 10%
Add

Day

80°
Partly Cloudy Day
Rain drop
10%
SSW 14 mph

Intervals of clouds and sunshine. High near 80F. Winds SSW at 10 to 20 mph.

  • Humidity
    Humidity48%
  • UV index
    UV Index6 of 11
  • Sunrise
    Sunrise6:35 am
  • Sunset
    Sunset7:33 pm

Night

57°
Scattered Showers Night
Rain drop
32%
S 11 mph

Mostly cloudy skies with a few showers late. Low 57F. Winds S at 10 to 15 mph. Chance of rain 30%.

  • Humidity
    Humidity57%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise2:16 am
  • Moonset
    Moonset11:17 am
  • Moon Phase - Day 21 Waning Gibbous

Fri 10

Showers Showers
77°/55°
Rain drop 40%
Add

Day

77°
Showers
Rain drop
40%
S 13 mph

Cloudy with showers. High 77F. Winds S at 10 to 20 mph. Chance of rain 40%.

  • Humidity
    Humidity57%
  • UV index
    UV Index4 of 11
  • Sunrise
    Sunrise6:33 am
  • Sunset
    Sunset7:34 pm

Night

55°
Showers
Rain drop
59%
S 10 mph

Considerable cloudiness with occasional rain showers. Low around 55F. Winds S at 5 to 10 mph. Chance of rain 60%.

  • Humidity
    Humidity69%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise2:56 am
  • Moonset
    Moonset12:19 pm
  • Moon Phase - Day 22 Last Quarter

Sat 11

Showers Showers
68°/52°
Rain drop 59%
Add

Day

68°
Showers
Rain drop
59%
SW 10 mph

Considerable cloudiness with occasional rain showers. High 68F. Winds SW at 10 to 15 mph. Chance of rain 60%.

  • Humidity
    Humidity71%
  • UV index
    UV Index4 of 11
  • Sunrise
    Sunrise6:32 am
  • Sunset
    Sunset7:35 pm

Night

52°
Showers
Rain drop
46%
NE 8 mph

Considerable cloudiness with occasional rain showers. Low 52F. Winds NE at 5 to 10 mph. Chance of rain 50%.

  • Humidity
    Humidity76%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise3:31 am
  • Moonset
    Moonset1:23 pm
  • Moon Phase - Day 23 Waning Crescent

Sun 12

Showers Showers
71°/52°
Rain drop 48%
Add

Day

71°
Showers
Rain drop
48%
S 11 mph

Considerable cloudiness with occasional rain showers. High 71F. Winds S at 10 to 15 mph. Chance of rain 50%.

  • Humidity
    Humidity63%
  • UV index
    UV Index4 of 11
  • Sunrise
    Sunrise6:30 am
  • Sunset
    Sunset7:36 pm

Night

52°
Showers
Rain drop
40%
S 9 mph

Considerable cloudiness with occasional rain showers. Low 52F. Winds S at 5 to 10 mph. Chance of rain 40%.

  • Humidity
    Humidity79%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise4:01 am
  • Moonset
    Moonset2:30 pm
  • Moon Phase - Day 24 Waning Crescent

Mon 13

Scattered Showers Day AM Showers
70°/51°
Rain drop 40%
Add

Day

70°
Scattered Showers Day
Rain drop
40%
SSW 10 mph

Showers in the morning, then partly cloudy in the afternoon. High around 70F. Winds SSW at 5 to 10 mph. Chance of rain 40%.

  • Humidity
    Humidity73%
  • UV index
    UV Index6 of 11
  • Sunrise
    Sunrise6:29 am
  • Sunset
    Sunset7:37 pm

Night

51°
Scattered Showers Night
Rain drop
42%
S 9 mph

Partly cloudy in the evening. Increasing clouds with periods of showers after midnight. Low 51F. Winds S at 5 to 10 mph. Chance of rain 40%.

  • Humidity
    Humidity77%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise4:27 am
  • Moonset
    Moonset3:36 pm
  • Moon Phase - Day 25 Waning Crescent

Tue 14

Scattered Thunderstorms Scattered Thunderstorms
72°/50°
Rain drop 58%
Add

Day

72°
Scattered Thunderstorms
Rain drop
58%
SW 10 mph

Mixed clouds and sun with scattered thunderstorms. High 72F. Winds SW at 5 to 10 mph. Chance of rain 60%.

  • Humidity
    Humidity67%
  • UV index
    UV Index5 of 11
  • Sunrise
    Sunrise6:28 am
  • Sunset
    Sunset7:38 pm

Night

50°
Showers
Rain drop
49%
WNW 7 mph

Cloudy with occasional rain showers. Low around 50F. Winds WNW at 5 to 10 mph. Chance of rain 50%.

  • Humidity
    Humidity77%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise4:52 am
  • Moonset
    Moonset4:45 pm
  • Moon Phase - Day 26 Waning Crescent

Wed 15

Scattered Showers Day AM Showers
72°/51°
Rain drop 33%
Add

Day

72°
Scattered Showers Day
Rain drop
33%
WNW 9 mph

A shower or two around the area in the morning, then partly cloudy in the afternoon. High 72F. Winds WNW at 5 to 10 mph. Chance of rain 30%.

  • Humidity
    Humidity62%
  • UV index
    UV Index7 of 11
  • Sunrise
    Sunrise6:26 am
  • Sunset
    Sunset7:39 pm

Night

51°
Scattered Showers Night
Rain drop
48%
NE 6 mph

Partly cloudy skies early followed by increasing clouds with showers developing later at night. Low 51F. Winds light and variable. Chance of rain 50%.

  • Humidity
    Humidity70%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise5:16 am
  • Moonset
    Moonset5:55 pm
  • Moon Phase - Day 27 Waning Crescent

Thu 16

Scattered Showers Day AM Showers
76°/53°
Rain drop 41%
Add

Day

76°
Scattered Showers Day
Rain drop
41%
S 9 mph

Rain showers early with some sunshine later in the day. High 76F. Winds S at 5 to 10 mph. Chance of rain 40%.

  • Humidity
    Humidity57%
  • UV index
    UV Index7 of 11
  • Sunrise
    Sunrise6:25 am
  • Sunset
    Sunset7:40 pm

Night

53°
Scattered Showers Night
Rain drop
33%
ESE 6 mph

Partly cloudy skies early followed by mostly cloudy skies and a few showers later at night. Low 53F. Winds ESE at 5 to 10 mph. Chance of rain 30%.

  • Humidity
    Humidity66%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise5:41 am
  • Moonset
    Moonset7:08 pm
  • Moon Phase - Day 28 Waning Crescent
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