O'Fallon, IL

Weather

As of
Current Temperature

84degrees Fahrenheit

Feels like:91°

Hi:100°Lo:81°

Warm and Humid

Live Weather Radar

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O'Fallon, IL weather radar map

Current Weather Details

Windchill
91°
Daily Rain
0"
Dew point
73°
Monthly Rain
0"
Humidity
70%
Avg. Wind
SSW 5 mph
Pressure
29.92"
Wind Gust
15 mph
Sunrise
6:30 AM
Moon
Third Quarter
Sunset
7:26 PM
UV Index
9 (Very High)

Weather Forecast

  • Tonight

    Lo

    Clear. Low temperature around 81F. Dew point will be around 74F with an average humidity of 76%. Winds will be 5 mph from the S.

  • Tomorrow

    Hi

    Sunny, hot with highs in the upper 90s. Southwest winds around 5 mph. Heat index values up to 108.

O'Fallon, IL 10-day weather forecast

AIR QUALITY

Air Quality Index
28|Fair
Top Triggers:
pm25
View Today's Air Quality details for O'Fallon, IL

POLLEN COUNT & ALLERGY FORECAST

Pollen Count
11.7|High
Predominant Pollen:
Ragweed, Chenopods, Nettle
O'Fallon, IL Pollen forecast details

LIGHTNING MAP

Closest strike in the last 30 minutes:331.8 miles

No Lightning Nearby

O'Fallon, IL real-time lightning alerts & live Map