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

As of 5:23 am CDT

Today

Partly Cloudy Day Partly Cloudy
62°/36°
Rain drop 1%
Subtract

Day

62°
Partly Cloudy Day
Rain drop
1%
W 18 mph

Sun and clouds mixed. High 62F. Winds W at 15 to 25 mph. Higher wind gusts possible.

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  • Humidity
    Humidity39%
  • UV index
    UV Index5 of 11
  • Sunrise
    Sunrise7:13 am
  • Sunset
    Sunset7:04 pm

Night

36°
Partly Cloudy Night
Mixed precipitation
2%
NNE 6 mph

A few clouds. Low 36F. Winds light and variable.

  • Humidity
    Humidity53%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise4:18 am
  • Moonset
    Moonset1:27 pm
  • Moon Phase - Day 24 Waning Crescent

Sat 14

Mostly Clear Day Mostly Sunny
63°/54°
Rain drop 3%
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Day

63°
Mostly Clear Day
Rain drop
3%
ESE 14 mph

A few passing clouds, otherwise generally sunny. High 63F. Winds ESE at 10 to 20 mph.

  • Humidity
    Humidity46%
  • UV index
    UV Index5 of 11
  • Sunrise
    Sunrise7:12 am
  • Sunset
    Sunset7:05 pm

Night

54°
Partly Cloudy Night
Rain drop
5%
SSE 14 mph

A few clouds from time to time. Low 54F. Winds SSE at 10 to 20 mph.

  • Humidity
    Humidity66%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise4:57 am
  • Moonset
    Moonset2:32 pm
  • Moon Phase - Day 25 Waning Crescent

Sun 15

Scattered Thunderstorms PM Thunderstorms/Wind
67°/19°
Rain drop 75%
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Day

67°
Scattered Thunderstorms
Rain drop
75%
SSW 24 mph

Windy with periods of thunderstorms later in the day. Potential for severe thunderstorms. High 67F. Winds SSW at 20 to 30 mph. Chance of rain 80%.

  • Humidity
    Humidity70%
  • UV index
    UV Index3 of 11
  • Sunrise
    Sunrise7:10 am
  • Sunset
    Sunset7:06 pm

Night

19°
Rain
Rain drop
84%
WNW 22 mph

Cloudy and windy with rain ending overnight. Thunder possible. Low 19F. Winds WNW at 20 to 30 mph. Chance of rain 80%.

  • Humidity
    Humidity84%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise5:29 am
  • Moonset
    Moonset3:38 pm
  • Moon Phase - Day 26 Waning Crescent

Mon 16

Windy Cloudy/Wind
27°/12°
Rain drop 14%
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Day

27°
Windy
Mixed precipitation
14%
WNW 21 mph

Cloudy with gusty winds. Cold. High 27F. Winds WNW at 20 to 30 mph.

  • Humidity
    Humidity60%
  • UV index
    UV Index2 of 11
  • Sunrise
    Sunrise7:08 am
  • Sunset
    Sunset7:07 pm

Night

12°
Partly Cloudy Night
Snowflake
1%
NW 15 mph

Some clouds early will give way to generally clear conditions overnight. Low 12F. Winds NW at 10 to 20 mph.

  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise5:58 am
  • Moonset
    Moonset4:46 pm
  • Moon Phase - Day 27 Waning Crescent

Tue 17

Mostly Clear Day Mostly Sunny
35°/30°
Rain drop 1%
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Day

35°
Mostly Clear Day
Mixed precipitation
1%
W 8 mph

Except for a few afternoon clouds, mainly sunny. Cool. High around 35F. Winds W at 5 to 10 mph.

  • Humidity
    Humidity45%
  • UV index
    UV Index5 of 11
  • Sunrise
    Sunrise7:07 am
  • Sunset
    Sunset7:08 pm

Night

30°
Cloudy
Mixed precipitation
15%
SSE 12 mph

Cloudy. Low around 30F. Winds SSE at 10 to 15 mph.

  • Humidity
    Humidity53%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise6:24 am
  • Moonset
    Moonset5:54 pm
  • Moon Phase - Day 28 Waning Crescent

Wed 18

Partly Cloudy Day AM Clouds/PM Sun
62°/35°
Rain drop 15%
Add

Day

62°
Partly Cloudy Day
Rain drop
15%
SSW 15 mph

Cloudy skies early, then partly cloudy in the afternoon. High 62F. Winds SSW at 10 to 20 mph.

  • Humidity
    Humidity54%
  • UV index
    UV Index5 of 11
  • Sunrise
    Sunrise7:05 am
  • Sunset
    Sunset7:09 pm

Night

35°
Mostly Clear Night
Mixed precipitation
7%
W 6 mph

Mainly clear. Low near 35F. Winds W at 5 to 10 mph.

  • Humidity
    Humidity73%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise6:49 am
  • Moonset
    Moonset7:03 pm
  • Moon Phase - Day 29 New Moon

Thu 19

Partly Cloudy Day Partly Cloudy
72°/46°
Rain drop 7%
Add

Day

72°
Partly Cloudy Day
Rain drop
7%
WSW 7 mph

Partly cloudy skies. High 72F. Winds WSW at 5 to 10 mph.

  • Humidity
    Humidity56%
  • UV index
    UV Index5 of 11
  • Sunrise
    Sunrise7:04 am
  • Sunset
    Sunset7:10 pm

Night

46°
Partly Cloudy Night
Rain drop
6%
SW 7 mph

A few clouds from time to time. Low 46F. Winds SW at 5 to 10 mph.

  • Humidity
    Humidity68%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise7:13 am
  • Moonset
    Moonset8:14 pm
  • Moon Phase - Day 1 Waxing Crescent

Fri 20

Partly Cloudy Day Partly Cloudy
73°/45°
Rain drop 6%
Add

Day

73°
Partly Cloudy Day
Rain drop
6%
NW 10 mph

Sunshine and clouds mixed. High 73F. Winds NW at 5 to 10 mph.

  • Humidity
    Humidity59%
  • UV index
    UV Index6 of 11
  • Sunrise
    Sunrise7:02 am
  • Sunset
    Sunset7:11 pm

Night

45°
Partly Cloudy Night
Rain drop
6%
W 5 mph

Clear to partly cloudy. Low around 45F. Winds light and variable.

  • Humidity
    Humidity76%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise7:39 am
  • Moonset
    Moonset9:27 pm
  • Moon Phase - Day 2 Waxing Crescent

Sat 21

Mostly Clear Day Mostly Sunny
74°/44°
Rain drop 5%
Add

Day

74°
Mostly Clear Day
Rain drop
5%
WNW 10 mph

Sunshine. High 74F. Winds WNW at 10 to 15 mph.

  • Humidity
    Humidity53%
  • UV index
    UV Index6 of 11
  • Sunrise
    Sunrise7:01 am
  • Sunset
    Sunset7:12 pm

Night

44°
Partly Cloudy Night
Rain drop
3%
N 8 mph

Partly cloudy skies. Low 44F. Winds N at 5 to 10 mph.

  • Humidity
    Humidity62%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise8:09 am
  • Moonset
    Moonset10:44 pm
  • Moon Phase - Day 3 Waxing Crescent

Sun 22

Partly Cloudy Day Partly Cloudy
67°/43°
Rain drop 3%
Add

Day

67°
Partly Cloudy Day
Rain drop
3%
E 11 mph

Intervals of clouds and sunshine. High 67F. NE winds shifting to SE at 10 to 15 mph.

  • Humidity
    Humidity51%
  • UV index
    UV Index6 of 11
  • Sunrise
    Sunrise6:59 am
  • Sunset
    Sunset7:13 pm

Night

43°
Partly Cloudy Night
Rain drop
4%
ESE 9 mph

A few clouds. Low 43F. Winds ESE at 5 to 10 mph.

  • Humidity
    Humidity64%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise8:44 am
  • Moonset
    Moonset--
  • Moon Phase - Day 4 Waxing Crescent

Mon 23

Mostly Clear Day Mostly Sunny
71°/52°
Rain drop 4%
Add

Day

71°
Mostly Clear Day
Rain drop
4%
SSW 12 mph

Mostly sunny skies. High 71F. Winds SSW at 10 to 15 mph.

  • Humidity
    Humidity53%
  • UV index
    UV Index6 of 11
  • Sunrise
    Sunrise6:58 am
  • Sunset
    Sunset7:14 pm

Night

52°
Partly Cloudy Night
Rain drop
19%
S 10 mph

Partly cloudy skies. Low 52F. Winds S at 5 to 10 mph.

  • Humidity
    Humidity58%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise9:27 am
  • Moonset
    Moonset12:00 am
  • Moon Phase - Day 5 Waxing Crescent

Tue 24

Partly Cloudy Day Partly Cloudy
72°/49°
Rain drop 13%
Add

Day

72°
Partly Cloudy Day
Rain drop
13%
SW 13 mph

Partly cloudy. High 72F. Winds SW at 10 to 15 mph.

  • Humidity
    Humidity54%
  • UV index
    UV Index6 of 11
  • Sunrise
    Sunrise6:56 am
  • Sunset
    Sunset7:15 pm

Night

49°
Scattered Showers Night
Rain drop
44%
NE 9 mph

Increasing clouds with showers arriving sometime after midnight. Low 49F. Winds NE at 5 to 10 mph. Chance of rain 40%.

  • Humidity
    Humidity65%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise10:20 am
  • Moonset
    Moonset1:14 am
  • Moon Phase - Day 6 Waxing Crescent

Wed 25

Showers Showers
66°/47°
Rain drop 46%
Add

Day

66°
Showers
Rain drop
46%
ENE 12 mph

Showers early becoming less numerous later in the day. High 66F. Winds ENE at 10 to 15 mph. Chance of rain 50%.

  • Humidity
    Humidity57%
  • UV index
    UV Index5 of 11
  • Sunrise
    Sunrise6:55 am
  • Sunset
    Sunset7:16 pm

Night

47°
Mostly Cloudy Night
Rain drop
24%
ESE 10 mph

Mostly cloudy skies. Low 47F. Winds ESE at 5 to 10 mph.

  • Humidity
    Humidity66%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise11:22 am
  • Moonset
    Moonset2:21 am
  • Moon Phase - Day 7 First Quarter

Thu 26

Partly Cloudy Day Partly Cloudy
68°/50°
Rain drop 23%
Add

Day

68°
Partly Cloudy Day
Rain drop
23%
S 15 mph

Considerable clouds early. Some decrease in clouds later in the day. High 68F. Winds S at 10 to 20 mph.

  • Humidity
    Humidity57%
  • UV index
    UV Index5 of 11
  • Sunrise
    Sunrise6:53 am
  • Sunset
    Sunset7:17 pm

Night

50°
Scattered Showers Night
Rain drop
36%
SSW 13 mph

Partly cloudy skies early will give way to occasional showers later during the night. Low near 50F. Winds SSW at 10 to 15 mph. Chance of rain 40%.

  • Humidity
    Humidity66%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise12:32 pm
  • Moonset
    Moonset3:17 am
  • Moon Phase - Day 8 Waxing Gibbous

Fri 27

Showers Showers
67°/49°
Rain drop 39%
Add

Day

67°
Showers
Rain drop
39%
SW 13 mph

Showers early becoming less numerous later in the day. High 67F. Winds SW at 10 to 20 mph. Chance of rain 40%.

  • Humidity
    Humidity61%
  • UV index
    UV Index5 of 11
  • Sunrise
    Sunrise6:52 am
  • Sunset
    Sunset7:18 pm

Night

49°
Mostly Cloudy Night
Rain drop
23%
W 9 mph

Mostly cloudy. Low 49F. Winds W at 5 to 10 mph.

  • Humidity
    Humidity69%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise1:44 pm
  • Moonset
    Moonset4:03 am
  • Moon Phase - Day 9 Waxing Gibbous
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