Outdoor conditions in

Mason

Illinois
Air qualityAir quality is moderate at the official reporting area.Air near ground level
Now
  1. 79°Showers And Thunderstorms Likely62% rain77% humidityGusts 13 mph
  2. 80°Showers And Thunderstorms Likely56% rain77% humidityGusts 15 mph
  3. 81°Showers And Thunderstorms Likely62% rain74% humidityGusts 17 mph
  4. 81°Showers And Thunderstorms Likely60% rain74% humidityGusts 16 mph
  5. 80°Showers And Thunderstorms Likely58% rain77% humidityGusts 16 mph
  6. 79°Chance Showers And Thunderstorms53% rain77% humidityGusts 18 mph
  7. 75°Chance Showers And Thunderstorms47% rain87% humidityGusts 18 mph
  8. 71°Chance Showers And Thunderstorms53% rain97% humidityGusts 18 mph
  9. 70°Showers And Thunderstorms Likely60% rain100% humidityGusts 18 mph
  10. 69°Rain Showers Likely58% rain100% humidityGusts 18 mph
  11. 68°Rain Showers Likely56% rain100% humidityGusts 20 mph
  12. 66°Chance Rain Showers51% rain100% humidityGusts 22 mph
  13. 63°Chance Rain Showers28% rain97% humidityGusts 23 mph
  14. 60°Chance Rain Showers36% rain96% humidityGusts 24 mph
  15. 56°Chance Rain Showers45% rain100% humidityGusts 25 mph
  16. 54°Chance Rain Showers34% rain100% humidityGusts 26 mph
  17. 52°Slight Chance Rain Showers23% rain96% humidityGusts 26 mph
  18. 51°Slight Chance Rain Showers15% rain93% humidityGusts 26 mph
  19. 50°Mostly Cloudy6% rain93% humidityGusts 26 mph
  20. 49°Mostly Cloudy3% rain93% humidityGusts 28 mph
  21. 51°Mostly Sunny0% rain83% humidityGusts 28 mph
  22. 52°Mostly Sunny0% rain74% humidityGusts 29 mph
  23. 55°Partly Sunny0% rain61% humidityGusts 29 mph
  24. 56°Partly Sunny2% rain59% humidityGusts 29 mph
Extra care for

A little farther out

The next five days

Today

Today carries a thunderstorm chance.

Rain
62%
Humidity
74–100%
Wind
20 mph
Fri

Friday has a real shower chance.

Rain
51%
Humidity
53–100%
Wind
29 mph
Sat

Saturday looks fairly quiet.

Rain
2%
Humidity
34–92%
Wind
21 mph
Sun

Sunday looks fairly quiet.

Rain
1%
Humidity
28–92%
Wind
10 mph
Mon

Monday looks fairly quiet.

Rain
0%
Humidity
30–92%
Wind
8 mph
  1. 81° / 68°Today carries a thunderstorm chance.62% rain · Humidity 74–100% · Wind 20 mph
  2. 66° / 47°Friday has a real shower chance.51% rain · Humidity 53–100% · Wind 29 mph
  3. 59° / 38°Saturday looks fairly quiet.2% rain · Humidity 34–92% · Wind 21 mph
  4. 66° / 34°Sunday looks fairly quiet.1% rain · Humidity 28–92% · Wind 10 mph
  5. 72° / 39°Monday looks fairly quiet.0% rain · Humidity 30–92% · Wind 8 mph

Environmental watch

Air quality + smoke

Air quality

Decatur area · Updated Thu 1:25 PM
55ModerateUS AQI

No fresh outlook yet.

55 is in the Moderate range (51–100). Most people can be active outside; if you’re unusually sensitive to fine particles, consider a shorter or easier outing.

Sky check

No plume detected overhead

Satellite view · Updated Thu 7:45 AM

Air near ground55 · Moderate US AQI

Rain, in motion · Past four hours

Mason radar

Ready when you areSee what is moving toward Mason.

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

Thunder is possible.

Humidity
77%
Wind
7 mph
Gusts
13 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 Decatur area, about 65 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 Mason, 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.