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Mazon, IL Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Mazon, a village in Grundy County, Illinois.

Tonight
65°F
Mostly Cloudy then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 3am. Mostly cloudy, with a low around 65. East southeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch possible.

7-day forecast for Mazon

WhenTempForecastWindPrecip
Tonight 65°F Mostly Cloudy then Chance Showers And Thunderstorms 10 mph ESE 28%
Saturday 84°F Showers And Thunderstorms Likely 5 to 10 mph SE 67%
Saturday Night 68°F Showers And Thunderstorms Likely 5 mph SW 79%
Sunday 72°F Showers And Thunderstorms 5 to 15 mph NNE 79%
Sunday Night 58°F Showers And Thunderstorms Likely 10 to 15 mph NE 71%
Monday 68°F Showers And Thunderstorms Likely 10 to 15 mph ENE 62%
Monday Night 54°F Chance Rain Showers 10 to 15 mph NE 33%
Tuesday 66°F Slight Chance Rain Showers 10 mph NE 24%
Tuesday Night 53°F Mostly Cloudy 5 to 10 mph NNE 12%
Wednesday 69°F Partly Sunny 5 to 10 mph NNE 6%
Wednesday Night 54°F Partly Cloudy 0 to 5 mph NNE 5%
Thursday 71°F Partly Sunny 0 to 5 mph NNE 3%
Thursday Night 54°F Partly Cloudy 0 to 5 mph NNE 3%
Friday 73°F Mostly Sunny 0 to 5 mph NNE 3%

Forecast source: National Weather Service (api.weather.gov) for Mazon (41.241, -88.423). Updated through the day.

Growing snapshot for Mazon

Last spring frost
Apr 20
First fall frost
Oct 23
Growing season
184 days
Hardiness zone
5b

More local growing data for Mazon: nearby ZIP 60444 weather · frost dates · planting calendar · Illinois frost dates

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Climate data from the nearest NOAA station, Morris 1 Nw, Il (9 mi from Mazon). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.