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O'Fallon, IL

22°F
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O'Fallon

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O'Fallon, IL Weather
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Today WinterCast

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 Daily Radar MinuteCast® Monthly Air Quality Health & Activities

WinterCast

Trace - 0.05 in

Fri, 1/2, 10:00 PM - Sat, 1/3, 12:00 AM

Ice

2 AM

22°
RealFeel® 1°
Bitterly Cold
RealFeel Guide
Bitterly Cold
-10° to 9°
Caution advised. Frostbite to exposed skin within 15 minutes. Hypothermia likely without protective clothing.
LEARN MORE
rain drop 0%
Chevron down
Intermittent clouds
alerts

Wind Advisory

3:00 PM Sunday - 6:00 AM Monday

WindWNW 21 mph

Air QualityFair

Wind Gusts36 mph

Humidity53%

Indoor Humidity21% (Very Dry)

Dew Point7° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover65%

Visibility10 mi

Cloud Ceiling33500 ft

3 AM

21°
RealFeel® 1°
Bitterly Cold
RealFeel Guide
Bitterly Cold
-10° to 9°
Caution advised. Frostbite to exposed skin within 15 minutes. Hypothermia likely without protective clothing.
LEARN MORE
rain drop 0%
Chevron down
Mostly cloudy
alerts

Wind Advisory

3:00 PM Sunday - 6:00 AM Monday

WindWNW 20 mph

Air QualityFair

Wind Gusts35 mph

Humidity51%

Indoor Humidity20% (Very Dry)

Dew Point6° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover76%

Visibility10 mi

Cloud Ceiling30000 ft

4 AM

21°
RealFeel® 0°
Bitterly Cold
RealFeel Guide
Bitterly Cold
-10° to 9°
Caution advised. Frostbite to exposed skin within 15 minutes. Hypothermia likely without protective clothing.
LEARN MORE
rain drop 0%
Chevron down
Mostly cloudy
alerts

Wind Advisory

3:00 PM Sunday - 6:00 AM Monday

WindWNW 18 mph

Air QualityFair

Wind Gusts32 mph

Humidity52%

Indoor Humidity20% (Very Dry)

Dew Point5° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover76%

Visibility10 mi

Cloud Ceiling30000 ft

5 AM

20°
RealFeel® 0°
Bitterly Cold
RealFeel Guide
Bitterly Cold
-10° to 9°
Caution advised. Frostbite to exposed skin within 15 minutes. Hypothermia likely without protective clothing.
LEARN MORE
rain drop 0%
Chevron down
Mostly cloudy
alerts

Wind Advisory

3:00 PM Sunday - 6:00 AM Monday

WindWNW 18 mph

Air QualityFair

Wind Gusts31 mph

Humidity51%

Indoor Humidity19% (Extremely Dry)

Dew Point4° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover76%

Visibility10 mi

Cloud Ceiling30000 ft

6 AM

19°
RealFeel® 0°
Bitterly Cold
RealFeel Guide
Bitterly Cold
-10° to 9°
Caution advised. Frostbite to exposed skin within 15 minutes. Hypothermia likely without protective clothing.
LEARN MORE
rain drop 0%
Chevron down
Mostly cloudy

WindWNW 17 mph

Air QualityFair

Wind Gusts30 mph

Humidity54%

Indoor Humidity20% (Very Dry)

Dew Point5° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover76%

Visibility10 mi

Cloud Ceiling30000 ft

7 AM

19°
RealFeel® -2°
Bitterly Cold
RealFeel Guide
Bitterly Cold
-10° to 9°
Caution advised. Frostbite to exposed skin within 15 minutes. Hypothermia likely without protective clothing.
LEARN MORE
rain drop 0%
Chevron down
Partly cloudy

WindWNW 20 mph

Air QualityFair

Wind Gusts28 mph

Humidity56%

Indoor Humidity20% (Very Dry)

Dew Point5° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover46%

Visibility10 mi

Cloud Ceiling30000 ft

8 AM

18°
RealFeel® -3°
Bitterly Cold
RealFeel Guide
Bitterly Cold
-10° to 9°
Caution advised. Frostbite to exposed skin within 15 minutes. Hypothermia likely without protective clothing.
LEARN MORE
rain drop 0%
Chevron down
Intermittent clouds

RealFeel Shade™-3°

WindWNW 21 mph

Air QualityFair

Max UV Index0.4 (Low)

Wind Gusts30 mph

Humidity59%

Indoor Humidity20% (Very Dry)

Dew Point6° F

AccuLumen Brightness Index™3 (Dull)

Cloud Cover53%

Visibility10 mi

Cloud Ceiling12400 ft

9 AM

20°
RealFeel® -1°
Bitterly Cold
RealFeel Guide
Bitterly Cold
-10° to 9°
Caution advised. Frostbite to exposed skin within 15 minutes. Hypothermia likely without protective clothing.
LEARN MORE
rain drop 0%
Chevron down
Intermittent clouds

RealFeel Shade™-1°

WindWNW 22 mph

Air QualityFair

Max UV Index0.6 (Low)

Wind Gusts30 mph

Humidity56%

Indoor Humidity21% (Very Dry)

Dew Point7° F

AccuLumen Brightness Index™5 (Medium)

Cloud Cover65%

Visibility10 mi

Cloud Ceiling3700 ft

10 AM

23°
RealFeel® 4°
Bitterly Cold
RealFeel Guide
Bitterly Cold
-10° to 9°
Caution advised. Frostbite to exposed skin within 15 minutes. Hypothermia likely without protective clothing.
LEARN MORE
rain drop 0%
Chevron down
Intermittent clouds

RealFeel Shade™2°

WindWNW 22 mph

Air QualityFair

Max UV Index1.1 (Low)

Wind Gusts32 mph

Humidity52%

Indoor Humidity22% (Very Dry)

Dew Point8° F

AccuLumen Brightness Index™7 (Bright)

Cloud Cover57%

Visibility10 mi

Cloud Ceiling7300 ft

11 AM

26°
RealFeel® 9°
Bitterly Cold
RealFeel Guide
Bitterly Cold
-10° to 9°
Caution advised. Frostbite to exposed skin within 15 minutes. Hypothermia likely without protective clothing.
LEARN MORE
rain drop 0%
Chevron down
Partly sunny

RealFeel Shade™6°

WindWNW 22 mph

Air QualityFair

Max UV Index2.2 (Low)

Wind Gusts35 mph

Humidity48%

Indoor Humidity23% (Very Dry)

Dew Point9° F

AccuLumen Brightness Index™8 (Bright)

Cloud Cover46%

Visibility10 mi

Cloud Ceiling30000 ft

12 PM

28°
RealFeel® 11°
Very Cold
RealFeel Guide
Very Cold
10° to 24°
Caution advised. Older adults, infants, and those with sensitive medical conditions, should be well dressed to protect from hypothermia and frostbite. Coat, hat, gloves and a scarf are appropriate.
LEARN MORE
rain drop 0%
Chevron down
Partly sunny

RealFeel Shade™8°

WindWNW 22 mph

Air QualityFair

Max UV Index2.4 (Low)

Wind Gusts37 mph

Humidity47%

Indoor Humidity24% (Very Dry)

Dew Point10° F

AccuLumen Brightness Index™8 (Bright)

Cloud Cover46%

Visibility10 mi

Cloud Ceiling30000 ft

1 PM

29°
RealFeel® 13°
Very Cold
RealFeel Guide
Very Cold
10° to 24°
Caution advised. Older adults, infants, and those with sensitive medical conditions, should be well dressed to protect from hypothermia and frostbite. Coat, hat, gloves and a scarf are appropriate.
LEARN MORE
rain drop 0%
Chevron down
Mostly sunny

RealFeel Shade™11°

WindWNW 22 mph

Air QualityFair

Max UV Index2.2 (Low)

Wind Gusts39 mph

Humidity46%

Indoor Humidity25% (Very Dry)

Dew Point11° F

AccuLumen Brightness Index™9 (Very Bright)

Cloud Cover10%

Visibility10 mi

Cloud Ceiling30000 ft

2 PM

31°
RealFeel® 15°
Very Cold
RealFeel Guide
Very Cold
10° to 24°
Caution advised. Older adults, infants, and those with sensitive medical conditions, should be well dressed to protect from hypothermia and frostbite. Coat, hat, gloves and a scarf are appropriate.
LEARN MORE
rain drop 0%
Chevron down
Sunny

RealFeel Shade™13°

WindWNW 21 mph

Air QualityFair

Max UV Index1.9 (Low)

Wind Gusts39 mph

Humidity44%

Indoor Humidity25% (Very Dry)

Dew Point11° F

AccuLumen Brightness Index™9 (Very Bright)

Cloud Cover9%

Visibility10 mi

Cloud Ceiling30000 ft

3 PM

32°
RealFeel® 16°
Very Cold
RealFeel Guide
Very Cold
10° to 24°
Caution advised. Older adults, infants, and those with sensitive medical conditions, should be well dressed to protect from hypothermia and frostbite. Coat, hat, gloves and a scarf are appropriate.
LEARN MORE
rain drop 0%
Chevron down
Mostly sunny

RealFeel Shade™15°

WindWNW 21 mph

Air QualityFair

Max UV Index1.3 (Low)

Wind Gusts40 mph

Humidity41%

Indoor Humidity25% (Very Dry)

Dew Point11° F

AccuLumen Brightness Index™8 (Bright)

Cloud Cover10%

Visibility10 mi

Cloud Ceiling30000 ft

4 PM

30°
RealFeel® 14°
Very Cold
RealFeel Guide
Very Cold
10° to 24°
Caution advised. Older adults, infants, and those with sensitive medical conditions, should be well dressed to protect from hypothermia and frostbite. Coat, hat, gloves and a scarf are appropriate.
LEARN MORE
rain drop 0%
Chevron down
Sunny

RealFeel Shade™14°

WindNW 20 mph

Air QualityFair

Max UV Index0.6 (Low)

Wind Gusts38 mph

Humidity44%

Indoor Humidity25% (Very Dry)

Dew Point11° F

AccuLumen Brightness Index™3 (Dull)

Cloud Cover7%

Visibility10 mi

Cloud Ceiling30000 ft

5 PM

28°
RealFeel® 11°
Very Cold
RealFeel Guide
Very Cold
10° to 24°
Caution advised. Older adults, infants, and those with sensitive medical conditions, should be well dressed to protect from hypothermia and frostbite. Coat, hat, gloves and a scarf are appropriate.
LEARN MORE
rain drop 0%
Chevron down
Clear

WindNW 17 mph

Air QualityFair

Wind Gusts35 mph

Humidity49%

Indoor Humidity25% (Very Dry)

Dew Point11° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover3%

Visibility10 mi

Cloud Ceiling30000 ft

6 PM

27°
RealFeel® 11°
Very Cold
RealFeel Guide
Very Cold
10° to 24°
Caution advised. Older adults, infants, and those with sensitive medical conditions, should be well dressed to protect from hypothermia and frostbite. Coat, hat, gloves and a scarf are appropriate.
LEARN MORE
rain drop 0%
Chevron down
Clear

WindNW 16 mph

Air QualityFair

Wind Gusts32 mph

Humidity51%

Indoor Humidity25% (Very Dry)

Dew Point11° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover0%

Visibility10 mi

Cloud Ceiling30000 ft

7 PM

26°
RealFeel® 9°
Bitterly Cold
RealFeel Guide
Bitterly Cold
-10° to 9°
Caution advised. Frostbite to exposed skin within 15 minutes. Hypothermia likely without protective clothing.
LEARN MORE
rain drop 0%
Chevron down
Clear

WindNW 17 mph

Air QualityFair

Wind Gusts31 mph

Humidity53%

Indoor Humidity25% (Very Dry)

Dew Point11° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover0%

Visibility10 mi

Cloud Ceiling30000 ft

8 PM

25°
RealFeel® 9°
Bitterly Cold
RealFeel Guide
Bitterly Cold
-10° to 9°
Caution advised. Frostbite to exposed skin within 15 minutes. Hypothermia likely without protective clothing.
LEARN MORE
rain drop 0%
Chevron down
Clear

WindNW 16 mph

Air QualityFair

Wind Gusts31 mph

Humidity53%

Indoor Humidity24% (Very Dry)

Dew Point10° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover0%

Visibility10 mi

Cloud Ceiling30000 ft

9 PM

25°
RealFeel® 8°
Bitterly Cold
RealFeel Guide
Bitterly Cold
-10° to 9°
Caution advised. Frostbite to exposed skin within 15 minutes. Hypothermia likely without protective clothing.
LEARN MORE
rain drop 0%
Chevron down
Clear

WindNW 16 mph

Air QualityFair

Wind Gusts28 mph

Humidity54%

Indoor Humidity24% (Very Dry)

Dew Point10° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover0%

Visibility10 mi

Cloud Ceiling30000 ft

10 PM

24°
RealFeel® 7°
Bitterly Cold
RealFeel Guide
Bitterly Cold
-10° to 9°
Caution advised. Frostbite to exposed skin within 15 minutes. Hypothermia likely without protective clothing.
LEARN MORE
rain drop 0%
Chevron down
Clear

WindNW 16 mph

Air QualityFair

Wind Gusts24 mph

Humidity55%

Indoor Humidity24% (Very Dry)

Dew Point10° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover0%

Visibility10 mi

Cloud Ceiling30000 ft

11 PM

23°
RealFeel® 7°
Bitterly Cold
RealFeel Guide
Bitterly Cold
-10° to 9°
Caution advised. Frostbite to exposed skin within 15 minutes. Hypothermia likely without protective clothing.
LEARN MORE
rain drop 0%
Chevron down
Clear

WindNW 15 mph

Air QualityFair

Wind Gusts23 mph

Humidity56%

Indoor Humidity24% (Very Dry)

Dew Point10° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover0%

Visibility10 mi

Cloud Ceiling30000 ft

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World North America United States Illinois O'Fallon

Weather Near O'Fallon:

  • O'Fallon, MO
  • St. Charles, MO
  • St. Louis, MO
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