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Heat wave to intensify as all-time March records fall across the West. See how hot it will get. Chevron right

O'Fallon, MO

68°F
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O'Fallon

Missouri

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O'Fallon, MO Weather
Today WinterCast Local {stormName} Tracker Hourly Daily Radar MinuteCast® Monthly Air Quality Health & Activities

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Winter Center
Today Hourly Daily Radar MinuteCast® Monthly Air Quality Health & Activities
Friday, March 20

Current Weather

9:43 AM

68°F
Sunny
RealFeel® 73°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
RealFeel Shade™ 67°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
RealFeel®
73°
RealFeel Shade™
67°
Max UV Index
2.9 (Moderate)
Wind
W 1 mph
Wind Gusts
5 mph
Humidity
50%
Indoor Humidity
50% (Ideal Humidity)
Dew Point
49° F
Pressure
↔ 29.93 in
Cloud Cover
0%
Visibility
12 mi
Cloud Ceiling
40000 ft

Day

3/20
84°Hi
RealFeel® 85°
Very Warm
RealFeel Guide
Very Warm
82° to 89°
Older adults, infants, and those with sensitive medical conditions should minimize outdoor activity, especially in the sunshine.
LEARN MORE
RealFeel Shade™ 81°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
Partly sunny and very warm

Max UV Index5.0 (Moderate)

AccuLumen Brightness Index™9 (Very Bright)

WindW 10 mph

Wind Gusts24 mph

Probability of Precipitation0%

Probability of Thunderstorms0%

Precipitation0.00 in

Cloud Cover21%

Morning

Afternoon

Night

3/20
48°Lo
RealFeel® 46°
Chilly
RealFeel Guide
Chilly
40° to 52°
Jacket or sweater is recommended.
LEARN MORE
Mainly clear

WindNE 6 mph

Wind Gusts8 mph

Probability of Precipitation0%

Probability of Thunderstorms0%

Precipitation0.00 in

Cloud Cover11%

Evening

Overnight

Sun & Moon

12 hrs 08 mins
Rise 7:07 AM
Set 7:15 PM
Waxing Crescent
Rise 7:43 AM
Set 9:32 PM

Temperature History

3/20
High
Low
Forecast
84°
48°
Average
58°
35°
Last Year
51°
28°

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World North America United States Missouri O'Fallon

Weather Near O'Fallon:

  • St. Charles, MO
  • St. Louis, MO
  • St. Peters, MO
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