Outdoor conditions in

Williamson

Illinois
Now
  1. 78°Chance Showers And Thunderstorms43% rain85% humidityGusts 16 mph
  2. 78°Chance Showers And Thunderstorms54% rain85% humidityGusts 16 mph
  3. 77°Chance Showers And Thunderstorms50% rain85% humidityGusts 16 mph
  4. 71°Chance Showers And Thunderstorms39% rain100% humidityGusts 16 mph
  5. 69°Chance Showers And Thunderstorms54% rain100% humidityGusts 17 mph
  6. 68°Showers And Thunderstorms Likely66% rain100% humidityGusts 17 mph
  7. 67°Chance Rain Showers53% rain100% humidityGusts 17 mph
  8. 63°Chance Rain Showers43% rain100% humidityGusts 23 mph
  9. 59°Chance Rain Showers47% rain100% humidityGusts 23 mph
  10. 56°Slight Chance Rain Showers17% rain96% humidityGusts 24 mph
  11. 54°Cloudy11% rain93% humidityGusts 24 mph
  12. 52°Mostly Cloudy12% rain93% humidityGusts 23 mph
  13. 51°Cloudy7% rain89% humidityGusts 22 mph
  14. 49°Mostly Cloudy6% rain93% humidityGusts 23 mph
  15. 48°Mostly Cloudy5% rain89% humidityGusts 24 mph
  16. 48°Partly Sunny1% rain83% humidityGusts 24 mph
  17. 47°Sunny0% rain86% humidityGusts 25 mph
  18. 50°Mostly Sunny0% rain80% humidityGusts 26 mph
  19. 51°Mostly Sunny0% rain74% humidityGusts 26 mph
  20. 53°Mostly Cloudy0% rain69% humidityGusts 28 mph
  21. 54°Partly Sunny0% rain64% humidityGusts 28 mph
  22. 54°Mostly Cloudy12% rain66% humidityGusts 26 mph
  23. 54°Partly Sunny6% rain66% humidityGusts 28 mph
  24. 55°Mostly Cloudy13% rain66% humidityGusts 26 mph
Extra care for

A little farther out

The next five days

Today

Today carries a thunderstorm chance.

Rain
69%
Humidity
82–100%
Wind
23 mph
Fri

Friday has a real shower chance.

Rain
47%
Humidity
64–100%
Wind
28 mph
Sat

Saturday looks fairly quiet.

Rain
0%
Humidity
39–96%
Wind
16 mph
Sun

Sunday looks fairly quiet.

Rain
0%
Humidity
30–89%
Wind
10 mph
Mon

Monday looks fairly quiet.

Rain
0%
Humidity
34–92%
Wind
8 mph
  1. 78° / 63°Today carries a thunderstorm chance.69% rain · Humidity 82–100% · Wind 23 mph
  2. 59° / 46°Friday has a real shower chance.47% rain · Humidity 64–100% · Wind 28 mph
  3. 59° / 35°Saturday looks fairly quiet.0% rain · Humidity 39–96% · Wind 16 mph
  4. 67° / 34°Sunday looks fairly quiet.0% rain · Humidity 30–89% · Wind 10 mph
  5. 71° / 38°Monday looks fairly quiet.0% rain · Humidity 34–92% · Wind 8 mph

Environmental watch

Air quality + smoke

Air quality

St. Louis (Metro-east) area · Updated Thu 4:25 PM
48GoodUS AQI

No fresh outlook yet.

Sky check

No plume detected overhead

Satellite view · Updated Thu 1:45 PM

Air near ground48 · Good US AQI

Rain, in motion · Past four hours

Williamson radar

Ready when you areSee what is moving toward Williamson.

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 12 mph. Gusts may reach 16 mph. Thunder is possible.

Humidity
85%
Wind
12 mph
Gusts
16 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 30 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 Williamson, 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.