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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 5:03 am CDT

Today

Mostly Clear Day Mostly Sunny
66°/45°
Rain drop 15%
Subtract

Day

66°
Mostly Clear Day
Rain drop
15%
SSW 9 mph

A mix of clouds and sun. High 66F. Winds SSW at 5 to 10 mph.

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Southwest Will Bake With Highs In 90s, 100s

  • Humidity
    Humidity47%
  • UV index
    UV Index5 of 11
  • Sunrise
    Sunrise7:09 am
  • Sunset
    Sunset7:12 pm

Night

45°
Partly Cloudy Night
Rain drop
6%
S 4 mph

Mostly cloudy skies early, then partly cloudy after midnight. Low near 45F. Winds light and variable.

  • Humidity
    Humidity66%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise6:52 am
  • Moonset
    Moonset7:07 pm
  • Moon Phase - Day 29 New Moon

Thu 19

Partly Cloudy Day Partly Cloudy
77°/44°
Rain drop 7%
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Day

77°
Partly Cloudy Day
Rain drop
7%
WSW 7 mph

Partly cloudy skies. High 77F. Winds WSW at 5 to 10 mph.

  • Humidity
    Humidity49%
  • UV index
    UV Index5 of 11
  • Sunrise
    Sunrise7:07 am
  • Sunset
    Sunset7:13 pm

Night

44°
Mostly Clear Night
Rain drop
8%
NNW 5 mph

Clear to partly cloudy. Low 44F. Winds light and variable.

  • Humidity
    Humidity75%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise7:16 am
  • Moonset
    Moonset8:18 pm
  • Moon Phase - Day 1 Waxing Crescent

Fri 20

Partly Cloudy Day Partly Cloudy
83°/48°
Rain drop 8%
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Day

83°
Partly Cloudy Day
Rain drop
8%
WSW 8 mph

Partly cloudy skies. High 83F. Winds WSW at 5 to 10 mph.

  • Humidity
    Humidity51%
  • UV index
    UV Index5 of 11
  • Sunrise
    Sunrise7:06 am
  • Sunset
    Sunset7:14 pm

Night

48°
Partly Cloudy Night
Rain drop
7%
NW 5 mph

A few clouds. Low 48F. Winds light and variable.

  • Humidity
    Humidity65%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise7:42 am
  • Moonset
    Moonset9:31 pm
  • Moon Phase - Day 2 Waxing Crescent

Sat 21

Sunny Sunny
84°/58°
Rain drop 7%
Add

Day

84°
Sunny
Rain drop
7%
SSW 9 mph

Mostly sunny. High 84F. Winds SSW at 5 to 10 mph.

  • Humidity
    Humidity50%
  • UV index
    UV Index6 of 11
  • Sunrise
    Sunrise7:04 am
  • Sunset
    Sunset7:15 pm

Night

58°
Clear Night
Rain drop
3%
SSW 8 mph

Clear skies. Low 58F. Winds SSW at 5 to 10 mph.

  • Humidity
    Humidity57%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise8:12 am
  • Moonset
    Moonset10:48 pm
  • Moon Phase - Day 3 Waxing Crescent

Sun 22

Mostly Clear Day Mostly Sunny
79°/37°
Rain drop 3%
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Day

79°
Mostly Clear Day
Rain drop
3%
W 15 mph

Except for a few afternoon clouds, mainly sunny. High 79F. SW winds shifting to NW at 10 to 20 mph.

  • Humidity
    Humidity47%
  • UV index
    UV Index6 of 11
  • Sunrise
    Sunrise7:02 am
  • Sunset
    Sunset7:16 pm

Night

37°
Partly Cloudy Night
Mixed precipitation
5%
N 14 mph

Mostly cloudy skies early, then partly cloudy after midnight. Low 37F. Winds N at 10 to 20 mph.

  • Humidity
    Humidity57%
  • 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
53°/36°
Rain drop 2%
Add

Day

53°
Partly Cloudy Day
Rain drop
2%
NE 12 mph

Intervals of clouds and sunshine. High 53F. Winds NE at 10 to 15 mph.

  • Humidity
    Humidity51%
  • UV index
    UV Index5 of 11
  • Sunrise
    Sunrise7:01 am
  • Sunset
    Sunset7:17 pm

Night

36°
Partly Cloudy Night
Mixed precipitation
10%
ENE 9 mph

Partly cloudy. Low 36F. Winds ENE at 5 to 10 mph.

  • Humidity
    Humidity59%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise9:29 am
  • Moonset
    Moonset12:04 am
  • Moon Phase - Day 5 Waxing Crescent

Tue 24

Partly Cloudy Day Partly Cloudy
60°/40°
Rain drop 11%
Add

Day

60°
Partly Cloudy Day
Rain drop
11%
ESE 9 mph

Mostly cloudy skies early will become partly cloudy later in the day. High near 60F. Winds ESE at 5 to 10 mph.

  • Humidity
    Humidity48%
  • UV index
    UV Index5 of 11
  • Sunrise
    Sunrise6:59 am
  • Sunset
    Sunset7:18 pm

Night

40°
Partly Cloudy Night
Rain drop
9%
SE 7 mph

A few clouds. Low around 40F. Winds SE at 5 to 10 mph.

  • Humidity
    Humidity59%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise10:22 am
  • Moonset
    Moonset1:18 am
  • Moon Phase - Day 6 Waxing Crescent

Wed 25

Partly Cloudy Day Partly Cloudy
69°/54°
Rain drop 5%
Add

Day

69°
Partly Cloudy Day
Rain drop
5%
S 12 mph

Partly cloudy. High 69F. Winds S at 10 to 15 mph.

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

Night

54°
Partly Cloudy Night
Rain drop
11%
S 12 mph

Partly cloudy skies. Low 54F. Winds S at 10 to 15 mph.

  • Humidity
    Humidity59%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise11:24 am
  • Moonset
    Moonset2:26 am
  • Moon Phase - Day 7 First Quarter

Thu 26

Partly Cloudy Day Partly Cloudy
72°/39°
Rain drop 23%
Add

Day

72°
Partly Cloudy Day
Rain drop
23%
SW 14 mph

Intervals of clouds and sunshine. High 72F. Winds SW at 10 to 20 mph.

  • Humidity
    Humidity50%
  • UV index
    UV Index5 of 11
  • Sunrise
    Sunrise6:56 am
  • Sunset
    Sunset7:20 pm

Night

39°
Partly Cloudy Night
Mixed precipitation
24%
NW 12 mph

Partly cloudy. Low 39F. Winds NW at 10 to 15 mph.

  • Humidity
    Humidity57%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise12:35 pm
  • Moonset
    Moonset3:21 am
  • Moon Phase - Day 8 Waxing Gibbous

Fri 27

Partly Cloudy Day Partly Cloudy
55°/32°
Rain drop 15%
Add

Day

55°
Partly Cloudy Day
Rain drop
15%
NNW 13 mph

Partly cloudy. High around 55F. Winds NNW at 10 to 15 mph.

  • Humidity
    Humidity49%
  • UV index
    UV Index6 of 11
  • Sunrise
    Sunrise6:55 am
  • Sunset
    Sunset7:21 pm

Night

32°
Partly Cloudy Night
Mixed precipitation
19%
N 10 mph

A few clouds. Low 32F. Winds N at 10 to 15 mph.

  • Humidity
    Humidity62%
  • 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°/38°
Rain drop 23%
Add

Day

57°
Partly Cloudy Day
Rain drop
23%
SE 11 mph

Some sun in the morning with increasing clouds during the afternoon. High 57F. ENE winds shifting to S at 10 to 15 mph.

  • Humidity
    Humidity51%
  • UV index
    UV Index6 of 11
  • Sunrise
    Sunrise6:53 am
  • Sunset
    Sunset7:22 pm

Night

38°
Partly Cloudy Night
Mixed precipitation
22%
S 9 mph

Considerable clouds early. Some decrease in clouds late. Low 38F. Winds S at 5 to 10 mph.

  • Humidity
    Humidity59%
  • 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
61°/45°
Rain drop 19%
Add

Day

61°
Partly Cloudy Day
Rain drop
19%
S 11 mph

Partly cloudy. High 61F. Winds S at 10 to 15 mph.

  • Humidity
    Humidity53%
  • UV index
    UV Index6 of 11
  • Sunrise
    Sunrise6:52 am
  • Sunset
    Sunset7:23 pm

Night

45°
Scattered Showers Night
Rain drop
48%
S 8 mph

Partly cloudy skies early followed by increasing clouds with showers developing later at night. Low near 45F. Winds S at 5 to 10 mph. Chance of rain 50%.

  • Humidity
    Humidity63%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise4:08 pm
  • Moonset
    Moonset5:13 am
  • Moon Phase - Day 11 Waxing Gibbous

Mon 30

Scattered Showers Day AM Showers
67°/50°
Rain drop 46%
Add

Day

67°
Scattered Showers Day
Rain drop
46%
SSW 12 mph

Rain showers early with some sunshine later in the day. High 67F. Winds SSW at 10 to 15 mph. Chance of rain 50%.

  • Humidity
    Humidity57%
  • UV index
    UV Index6 of 11
  • Sunrise
    Sunrise6:50 am
  • Sunset
    Sunset7:24 pm

Night

50°
Scattered Showers Night
Rain drop
48%
S 9 mph

Mostly cloudy in the evening then periods of showers after midnight. Low near 50F. Winds S at 5 to 10 mph. Chance of rain 50%.

  • Humidity
    Humidity67%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise5:14 pm
  • Moonset
    Moonset5:38 am
  • Moon Phase - Day 12 Waxing Gibbous

Tue 31

Scattered Showers Day AM Showers
70°/53°
Rain drop 46%
Add

Day

70°
Scattered Showers Day
Rain drop
46%
S 13 mph

Rain showers early with mostly cloudy conditions later in the day. High around 70F. Winds S at 10 to 15 mph. Chance of rain 50%.

  • Humidity
    Humidity60%
  • UV index
    UV Index5 of 11
  • Sunrise
    Sunrise6:49 am
  • Sunset
    Sunset7:25 pm

Night

53°
Showers
Rain drop
46%
S 11 mph

Considerable cloudiness with occasional rain showers. Low 53F. Winds S at 10 to 15 mph. Chance of rain 50%.

  • Humidity
    Humidity69%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise6:19 pm
  • Moonset
    Moonset6:01 am
  • Moon Phase - Day 13 Waxing Gibbous

Wed 01

Mostly Cloudy Day Mostly Cloudy
71°/51°
Rain drop 24%
Add

Day

71°
Mostly Cloudy Day
Rain drop
24%
SSW 14 mph

Mostly cloudy skies. High 71F. Winds SSW at 10 to 20 mph.

  • Humidity
    Humidity61%
  • UV index
    UV Index5 of 11
  • Sunrise
    Sunrise6:47 am
  • Sunset
    Sunset7:26 pm

Night

51°
Scattered Thunderstorms Night
Rain drop
53%
SSW 10 mph

Showers early then scattered thunderstorms developing late. Low 51F. Winds SSW at 10 to 15 mph. Chance of rain 50%.

  • Humidity
    Humidity72%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise7:22 pm
  • Moonset
    Moonset6:24 am
  • Moon Phase - Day 14 Full Moon
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