Weather Forecast and Conditions for O'Fallon, Missouri 63366 - The Weather Channel | Weather.com
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47° Mostly Clear Day
Fair
Day 65° • Night 43°
Feels Like42°
Sunrise

6:59 am

Sunset

7:18 pm

Temperature
High / Low
65°/43°
Wind
10 mph
Humidity
Humidity
50%
Dew point
Dew Point
29°
Pressure
Pressure
30.35 in
UV index
UV Index
1 of 11
Visibility
Visibility
10 mi
Moon Phase - Day 6
Moon Phase
Waxing Crescent

Hourly Weather-

Now

Partly Cloudy Day Partly Cloudy
49°
Rain drop 0%
SE 11 mph
Subtract

Partly Cloudy

  • Temperature feels like
    Feels Like44°
  • WindSE 11 mph
  • Humidity
    Humidity46%
  • UV index
    UV Index2 of 11
  • Cloud
    Cloud Cover55%
  • Rain drop
    Rain Amount0 in

11 am

Mostly Cloudy Day Mostly Cloudy
52°
Rain drop 0%
SE 11 mph
Add

Mostly Cloudy

  • Temperature feels like
    Feels Like48°
  • WindSE 11 mph
  • Humidity
    Humidity41%
  • UV index
    UV Index3 of 11
  • Cloud
    Cloud Cover69%
  • Rain drop
    Rain Amount0 in

12 pm

Mostly Cloudy Day Mostly Cloudy
55°
Rain drop 0%
SE 10 mph
Add

Mostly Cloudy

  • Temperature feels like
    Feels Like53°
  • WindSE 10 mph
  • Humidity
    Humidity36%
  • UV index
    UV Index4 of 11
  • Cloud
    Cloud Cover71%
  • Rain drop
    Rain Amount0 in

1 pm

Mostly Cloudy Day Mostly Cloudy
56°
Rain drop 0%
SE 8 mph
Add

Mostly Cloudy

  • Temperature feels like
    Feels Like55°
  • WindSE 8 mph
  • Humidity
    Humidity33%
  • UV index
    UV Index5 of 11
  • Cloud
    Cloud Cover63%
  • Rain drop
    Rain Amount0 in
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10 Day Weather-

Today

Partly Cloudy Day Partly Cloudy
65°/43°
Rain drop 0%
Subtract

Day

65°
Partly Cloudy Day
SE 11 mph

A mix of clouds and sun. High around 65F. Winds SE at 10 to 15 mph.

  • Humidity
    Humidity34%
  • UV index
    UV Index5 of 11
  • Sunrise
    Sunrise6:59 am
  • Sunset
    Sunset7:18 pm

Night

43°
Mostly Cloudy Night
Rain drop
2%
SE 7 mph

Mostly cloudy. Low 43F. Winds SE at 5 to 10 mph.

  • Humidity
    Humidity48%
  • 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
81°/64°
Rain drop 3%
Add

Day

81°
Partly Cloudy Day
Rain drop
3%
S 11 mph

Partly cloudy skies. High 81F. Winds S at 10 to 15 mph.

  • Humidity
    Humidity44%
  • UV index
    UV Index6 of 11
  • Sunrise
    Sunrise6:58 am
  • Sunset
    Sunset7:19 pm

Night

64°
Partly Cloudy Night
Rain drop
8%
SSW 10 mph

Some clouds early will give way to generally clear conditions overnight. Low 64F. Winds SSW at 5 to 10 mph.

  • Humidity
    Humidity58%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise11:24 am
  • Moonset
    Moonset2:26 am
  • Moon Phase - Day 7 First Quarter

Thu 26

Mostly Clear Day Mostly Sunny
91°/39°
Rain drop 4%
Add

Day

91°
Mostly Clear Day
Rain drop
4%
SW 15 mph

Except for a few afternoon clouds, mainly sunny. Near record high temperatures. High 91F. Winds SW at 10 to 20 mph.

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

Night

39°
Thunderstorms
Rain drop
72%
N 15 mph

Showers and scattered thunderstorms. Gusty winds and small hail are possible. Low 39F. Winds N at 10 to 20 mph. Chance of rain 70%.

  • Humidity
    Humidity74%
  • 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 AM Clouds/PM Sun
52°/28°
Rain drop 24%
Add

Day

52°
Partly Cloudy Day
Rain drop
24%
N 13 mph

A shower is possible early. Cloudy skies early, followed by partial clearing. High 52F. Winds N at 10 to 20 mph.

  • Humidity
    Humidity62%
  • UV index
    UV Index5 of 11
  • Sunrise
    Sunrise6:55 am
  • Sunset
    Sunset7:21 pm

Night

28°
Partly Cloudy Night
Mixed precipitation
4%
N 10 mph

Partly cloudy skies. Low 28F. Winds N at 5 to 10 mph.

  • Humidity
    Humidity65%
  • UV index
    UV Index0 of 11
  • Moonrise
    Moonrise1:47 pm
  • Moonset
    Moonset4:07 am
  • Moon Phase - Day 9 Waxing Gibbous
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