Mazon, IL Weather & Growing Conditions
Today
85°F
Mostly Sunny
Mostly sunny, with a high near 85. South southwest wind 5 to 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Mostly Sunny | 5 to 10 mph SSW | 2% |
| Tonight | 67°F | Partly Cloudy | 5 mph S | 7% |
| Wednesday | 82°F | Chance Showers And Thunderstorms | 5 mph SW | 51% |
| Wednesday Night | 67°F | Showers And Thunderstorms | 0 to 5 mph W | 90% |
| Thursday | 81°F | Chance Showers And Thunderstorms | 0 to 5 mph SSE | 77% |
| Thursday Night | 64°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 39% |
| Friday | 84°F | Mostly Sunny | 0 mph | 6% |
| Friday Night | 66°F | Mostly Clear | 0 mph | 9% |
| Saturday | 86°F | Mostly Sunny | 0 to 5 mph SSW | 11% |
| Saturday Night | 70°F | Mostly Clear | 0 to 5 mph SSW | 11% |
| Sunday | 88°F | Mostly Sunny | 5 to 10 mph SW | 10% |
| Sunday Night | 71°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph SSW | 30% |
| Monday | 88°F | Chance Showers And Thunderstorms | 5 to 10 mph SSW | 30% |
| Monday Night | 71°F | Chance Showers And Thunderstorms | 5 to 10 mph WSW | 38% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Mazon, IL
Last spring frost
Apr 20
First fall frost
Oct 23
Growing season
184 days
Hardiness zone
5b
Explore more for Mazon, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Morris 1 Nw, Il (9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.