Outdoor conditions in

O'Fallon

Illinois
Now
  1. 80°Chance Showers And Thunderstorms48% rain77% humidityGusts 15 mph
  2. 81°Chance Showers And Thunderstorms46% rain77% humidityGusts 16 mph
  3. 81°Chance Showers And Thunderstorms44% rain77% humidityGusts 17 mph
  4. 81°Chance Showers And Thunderstorms37% rain77% humidityGusts 17 mph
  5. 81°Chance Showers And Thunderstorms44% rain77% humidityGusts 17 mph
  6. 80°Chance Showers And Thunderstorms46% rain77% humidityGusts 17 mph
  7. 74°Scattered Showers And Thunderstorms48% rain93% humidityGusts 17 mph
  8. 72°Chance Showers And Thunderstorms60% rain97% humidityGusts 18 mph
  9. 71°Scattered Showers And Thunderstorms54% rain97% humidityGusts 18 mph
  10. 70°Chance Showers And Thunderstorms59% rain97% humidityGusts 18 mph
  11. 67°Scattered Rain Showers53% rain97% humidityGusts 23 mph
  12. 64°Chance Rain Showers65% rain100% humidityGusts 24 mph
  13. 61°Scattered Rain Showers35% rain100% humidityGusts 25 mph
  14. 58°Scattered Rain Showers26% rain100% humidityGusts 26 mph
  15. 56°Cloudy9% rain96% humidityGusts 26 mph
  16. 54°Cloudy4% rain96% humidityGusts 25 mph
  17. 52°Mostly Cloudy3% rain96% humidityGusts 25 mph
  18. 51°Mostly Cloudy1% rain93% humidityGusts 26 mph
  19. 52°Partly Sunny2% rain83% humidityGusts 26 mph
  20. 49°Mostly Sunny0% rain89% humidityGusts 26 mph
  21. 52°Mostly Sunny0% rain83% humidityGusts 28 mph
  22. 53°Mostly Sunny0% rain77% humidityGusts 26 mph
  23. 55°Partly Sunny0% rain72% humidityGusts 28 mph
  24. 56°Partly Sunny0% rain66% humidityGusts 28 mph
Extra care for

A little farther out

The next five days

Today

Today carries a thunderstorm chance.

Rain
70%
Humidity
77–100%
Wind
23 mph
Fri

Friday has a real shower chance.

Rain
65%
Humidity
64–100%
Wind
29 mph
Sat

Saturday looks fairly quiet.

Rain
1%
Humidity
42–93%
Wind
21 mph
Sun

Sunday looks fairly quiet.

Rain
0%
Humidity
37–85%
Wind
10 mph
Mon

Monday looks fairly quiet.

Rain
0%
Humidity
39–96%
Wind
6 mph
  1. 81° / 67°Today carries a thunderstorm chance.70% rain · Humidity 77–100% · Wind 23 mph
  2. 64° / 48°Friday has a real shower chance.65% rain · Humidity 64–100% · Wind 29 mph
  3. 60° / 40°Saturday looks fairly quiet.1% rain · Humidity 42–93% · Wind 21 mph
  4. 66° / 38°Sunday looks fairly quiet.0% rain · Humidity 37–85% · Wind 10 mph
  5. 72° / 40°Monday looks fairly quiet.0% rain · Humidity 39–96% · Wind 6 mph

Environmental watch

Air quality + smoke

Air quality

St. Louis (Metro-east) area · Updated Thu 1:25 PM
44GoodUS AQI

No fresh outlook yet.

Sky check

No plume detected overhead

Satellite view · Updated Thu 7:45 AM

Air near ground44 · Good US AQI

Rain, in motion · Past four hours

O'Fallon radar

Ready when you areSee what is moving toward O'Fallon.

Watch the last four hours of rain, then search any nearby trail, lake, or address.

View the official forecast ↗

Outdoor fire check

Thinking about a backyard fire?

Use extra caution.

There is no lower-concern three-hour stretch in the next 12 hours.

Next 12 hoursChoose a time to see what is driving the concern.
Selected timeNowUse caution

Sustained wind is 10 mph. Thunder is possible.

Humidity
77%
Wind
10 mph
Gusts
15 mph

Check local rules. Weather is only part of the decision. Check city, county, and land-manager fire restrictions before lighting any outdoor fire.

About these readingsSources and local limits

Weather

Forecasts, alerts, and radar come from NOAA and the National Weather Service.

Air quality

This reading describes St. Louis (Metro-east) area, about 4 miles away. Conditions can differ at this exact spot.

Smoke

Satellite imagery shows smoke overhead. It cannot tell us how much smoke has reached breathing level.

This page represents O'Fallon, IL, so conditions can vary from street to street. Environmental data: AirNow · participating air agencies · preliminary real-time US AQI · NOAA Hazard Mapping System · satellite-observed smoke.