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10-Day Weather Forecast for O'Fallon, Missouri 63366 - The Weather Channel | weather.com
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10 Day Weather-

As of 11:36 am CDT

Today

Mostly Clear Day Mostly Sunny
90°/49°
Rain drop 0%
Subtract

Day

90°
Mostly Clear Day
W 12 mph

A good deal of sunshine. Very warm. High around 90F. Winds W at 10 to 15 mph.

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  • Humidity
    Humidity26%
  • UV index
    UV Index5 of 11
  • Sunrise
    Sunrise7:06 am
  • Sunset
    Sunset7:14 pm

Night

49°
Partly Cloudy Night
Rain drop
7%
NNE 6 mph

Partly cloudy. Low 49F. Winds NNE at 5 to 10 mph.

  • Humidity
    Humidity63%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise7:42 am
  • Moonset
    Moonset9:31 pm
  • Moon Phase - Day 2 Waxing Crescent

Sat 21

Sunny Sunny
87°/62°
Rain drop 8%
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Day

87°
Sunny
Rain drop
8%
SSE 7 mph

A mainly sunny sky. Near record high temperatures. High 87F. Winds SSE at 5 to 10 mph.

  • Humidity
    Humidity49%
  • UV index
    UV Index6 of 11
  • Sunrise
    Sunrise7:04 am
  • Sunset
    Sunset7:15 pm

Night

62°
Clear Night
Rain drop
4%
SSW 8 mph

Clear. Low 62F. Winds SSW at 5 to 10 mph.

  • Humidity
    Humidity54%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise8:12 am
  • Moonset
    Moonset10:48 pm
  • Moon Phase - Day 3 Waxing Crescent

Sun 22

Partly Cloudy Day Partly Cloudy
87°/37°
Rain drop 4%
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Day

87°
Partly Cloudy Day
Rain drop
4%
WSW 19 mph

Mostly sunny skies during the morning hours will become overcast in the afternoon. High 87F. WSW winds at 5 to 10 mph, increasing to 15 to 25 mph. Higher wind gusts possible.

  • Humidity
    Humidity48%
  • UV index
    UV Index6 of 11
  • Sunrise
    Sunrise7:02 am
  • Sunset
    Sunset7:16 pm

Night

37°
Partly Cloudy Night
Mixed precipitation
3%
N 19 mph

Partly cloudy. Low 37F. Winds N at 15 to 25 mph.

  • Humidity
    Humidity59%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise8:47 am
  • Moonset
    Moonset--
  • Moon Phase - Day 4 Waxing Crescent

Mon 23

Partly Cloudy Day Partly Cloudy
58°/39°
Rain drop 3%
Add

Day

58°
Partly Cloudy Day
Rain drop
3%
NNE 9 mph

Sunshine and clouds mixed. High 58F. Winds NNE at 5 to 10 mph.

  • Humidity
    Humidity47%
  • UV index
    UV Index5 of 11
  • Sunrise
    Sunrise7:01 am
  • Sunset
    Sunset7:17 pm

Night

39°
Mostly Cloudy Night
Mixed precipitation
1%
ESE 6 mph

Partly cloudy skies in the evening, then becoming cloudy overnight. Low 39F. Winds light and variable.

  • Humidity
    Humidity55%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise9:29 am
  • Moonset
    Moonset12:04 am
  • Moon Phase - Day 5 Waxing Crescent

Tue 24

Mostly Cloudy Day Mostly Cloudy
62°/42°
Rain drop 15%
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Day

62°
Mostly Cloudy Day
Rain drop
15%
SSE 8 mph

Mostly cloudy. High 62F. Winds SSE at 5 to 10 mph.

  • Humidity
    Humidity47%
  • UV index
    UV Index5 of 11
  • Sunrise
    Sunrise6:59 am
  • Sunset
    Sunset7:18 pm

Night

42°
Partly Cloudy Night
Rain drop
20%
ESE 5 mph

Partly cloudy early with increasing clouds overnight. Low 42F. Winds light and variable.

  • Humidity
    Humidity63%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise10:22 am
  • Moonset
    Moonset1:18 am
  • Moon Phase - Day 6 Waxing Crescent

Wed 25

Mostly Cloudy Day Mostly Cloudy
69°/51°
Rain drop 4%
Add

Day

69°
Mostly Cloudy Day
Rain drop
4%
SE 9 mph

Mostly cloudy. High 69F. Winds SE at 5 to 10 mph.

  • Humidity
    Humidity51%
  • UV index
    UV Index5 of 11
  • Sunrise
    Sunrise6:58 am
  • Sunset
    Sunset7:19 pm

Night

51°
Partly Cloudy Night
Rain drop
4%
S 9 mph

Partly cloudy skies. Low 51F. Winds S at 5 to 10 mph.

  • Humidity
    Humidity61%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise11:24 am
  • Moonset
    Moonset2:25 am
  • Moon Phase - Day 7 First Quarter

Thu 26

Mostly Clear Day Mostly Sunny
81°/43°
Rain drop 21%
Add

Day

81°
Mostly Clear Day
Rain drop
21%
SSW 14 mph

Sunny along with a few clouds. High 81F. Winds SSW at 10 to 20 mph.

  • Humidity
    Humidity49%
  • UV index
    UV Index6 of 11
  • Sunrise
    Sunrise6:56 am
  • Sunset
    Sunset7:20 pm

Night

43°
Rain
Rain drop
63%
NW 12 mph

Rain early...then remaining cloudy with showers late. Low 43F. Winds NW at 10 to 15 mph. Chance of rain 60%. Rainfall around a half an inch.

  • Humidity
    Humidity59%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise12:35 pm
  • Moonset
    Moonset3:21 am
  • Moon Phase - Day 8 Waxing Gibbous

Fri 27

Scattered Showers Day AM Showers
54°/33°
Rain drop 45%
Add

Day

54°
Scattered Showers Day
Rain drop
45%
N 12 mph

Rain showers early with mostly cloudy conditions later in the day. High 54F. Winds N at 10 to 15 mph. Chance of rain 50%.

  • Humidity
    Humidity47%
  • UV index
    UV Index5 of 11
  • Sunrise
    Sunrise6:55 am
  • Sunset
    Sunset7:21 pm

Night

33°
Partly Cloudy Night
Mixed precipitation
5%
NNE 8 mph

A few clouds from time to time. Low 33F. Winds NNE at 5 to 10 mph.

  • Humidity
    Humidity54%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise1:47 pm
  • Moonset
    Moonset4:07 am
  • Moon Phase - Day 9 Waxing Gibbous

Sat 28

Partly Cloudy Day Partly Cloudy
57°/40°
Rain drop 13%
Add

Day

57°
Partly Cloudy Day
Rain drop
13%
S 9 mph

Partly cloudy skies. High 57F. Winds S at 5 to 10 mph.

  • Humidity
    Humidity46%
  • UV index
    UV Index6 of 11
  • Sunrise
    Sunrise6:53 am
  • Sunset
    Sunset7:22 pm

Night

40°
Partly Cloudy Night
Rain drop
6%
SSW 8 mph

Partly cloudy. Low near 40F. Winds SSW at 5 to 10 mph.

  • Humidity
    Humidity53%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise2:59 pm
  • Moonset
    Moonset4:43 am
  • Moon Phase - Day 10 Waxing Gibbous

Sun 29

Partly Cloudy Day Partly Cloudy
68°/47°
Rain drop 11%
Add

Day

68°
Partly Cloudy Day
Rain drop
11%
SSW 11 mph

Sunshine and clouds mixed. High 68F. Winds SSW at 10 to 15 mph.

  • Humidity
    Humidity42%
  • UV index
    UV Index6 of 11
  • Sunrise
    Sunrise6:52 am
  • Sunset
    Sunset7:23 pm

Night

47°
Partly Cloudy Night
Rain drop
22%
S 8 mph

Mostly cloudy skies early will become partly cloudy late. Low 47F. Winds S at 5 to 10 mph.

  • Humidity
    Humidity54%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise4:08 pm
  • Moonset
    Moonset5:12 am
  • Moon Phase - Day 11 Waxing Gibbous

Mon 30

Partly Cloudy Day Partly Cloudy
75°/55°
Rain drop 24%
Add

Day

75°
Partly Cloudy Day
Rain drop
24%
SSW 12 mph

Intervals of clouds and sunshine. High near 75F. Winds SSW at 10 to 15 mph.

  • Humidity
    Humidity48%
  • UV index
    UV Index6 of 11
  • Sunrise
    Sunrise6:50 am
  • Sunset
    Sunset7:24 pm

Night

55°
Scattered Showers Night
Rain drop
43%
S 10 mph

Mostly cloudy with some showers late. Low around 55F. Winds S at 5 to 10 mph. Chance of rain 40%.

  • Humidity
    Humidity56%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise5:14 pm
  • Moonset
    Moonset5:38 am
  • Moon Phase - Day 12 Waxing Gibbous

Tue 31

Showers Showers
75°/54°
Rain drop 59%
Add

Day

75°
Showers
Rain drop
59%
SSW 13 mph

Overcast with rain showers at times. High near 75F. Winds SSW at 10 to 15 mph. Chance of rain 60%.

  • Humidity
    Humidity56%
  • UV index
    UV Index5 of 11
  • Sunrise
    Sunrise6:49 am
  • Sunset
    Sunset7:25 pm

Night

54°
Showers
Rain drop
55%
S 10 mph

Overcast with showers at times. Low 54F. Winds S at 5 to 10 mph. Chance of rain 60%.

  • Humidity
    Humidity67%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise6:19 pm
  • Moonset
    Moonset6:01 am
  • Moon Phase - Day 13 Waxing Gibbous

Wed 01

Showers Showers
69°/52°
Rain drop 49%
Add

Day

69°
Showers
Rain drop
49%
SSW 14 mph

Cloudy with showers. High 69F. Winds SSW at 10 to 20 mph. Chance of rain 50%.

  • Humidity
    Humidity63%
  • UV index
    UV Index4 of 11
  • Sunrise
    Sunrise6:47 am
  • Sunset
    Sunset7:26 pm

Night

52°
Showers
Rain drop
32%
S 11 mph

Cloudy with a few showers. Low 52F. Winds S at 10 to 15 mph. Chance of rain 30%.

  • Humidity
    Humidity68%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise7:22 pm
  • Moonset
    Moonset6:23 am
  • Moon Phase - Day 14 Full Moon

Thu 02

Showers Showers
70°/51°
Rain drop 38%
Add

Day

70°
Showers
Rain drop
38%
SSE 13 mph

Showers early becoming less numerous later in the day. High around 70F. Winds SSE at 10 to 15 mph. Chance of rain 40%.

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

Night

51°
Showers
Rain drop
44%
SE 10 mph

Cloudy with showers. Low 51F. Winds SE at 10 to 15 mph. Chance of rain 40%.

  • Humidity
    Humidity70%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise8:26 pm
  • Moonset
    Moonset6:46 am
  • Moon Phase - Day 15 Full Moon

Fri 03

Showers Showers
70°/52°
Rain drop 38%
Add

Day

70°
Showers
Rain drop
38%
SSE 13 mph

Overcast with rain showers at times. High near 70F. Winds SSE at 10 to 15 mph. Chance of rain 40%.

  • Humidity
    Humidity62%
  • UV index
    UV Index4 of 11
  • Sunrise
    Sunrise6:44 am
  • Sunset
    Sunset7:28 pm

Night

52°
Showers
Rain drop
58%
SSE 9 mph

Cloudy with occasional rain showers. Low 52F. Winds SSE at 5 to 10 mph. Chance of rain 60%.

  • Humidity
    Humidity70%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise9:28 pm
  • Moonset
    Moonset7:10 am
  • Moon Phase - Day 16 Waning Gibbous
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