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Seymour, IL Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Seymour, a community in Champaign County, Illinois.

Tonight
67°F
Mostly Cloudy
Mostly cloudy, with a low around 67. Southeast wind around 9 mph.

7-day forecast for Seymour

WhenTempForecastWindPrecip
Tonight 67°F Mostly Cloudy 9 mph SE 5%
Saturday 88°F Chance Showers And Thunderstorms 9 mph S 26%
Saturday Night 69°F Slight Chance Showers And Thunderstorms 8 mph S 27%
Sunday 83°F Chance Showers And Thunderstorms 5 to 14 mph NNE 52%
Sunday Night 59°F Chance Showers And Thunderstorms 13 to 16 mph NE 62%
Monday 69°F Showers And Thunderstorms Likely 17 mph NE 70%
Monday Night 54°F Showers And Thunderstorms Likely 14 to 18 mph NE 55%
Tuesday 67°F Chance Rain Showers 16 mph NE 33%
Tuesday Night 52°F Mostly Cloudy 9 to 16 mph NNE 10%
Wednesday 69°F Partly Sunny 9 to 13 mph NNE 3%
Wednesday Night 53°F Partly Cloudy 6 to 13 mph NNE 3%
Thursday 72°F Mostly Sunny 7 to 10 mph NNE 4%
Thursday Night 54°F Partly Cloudy 6 to 9 mph NNE 4%
Friday 73°F Mostly Sunny 6 to 10 mph NNE 4%

Forecast source: National Weather Service (api.weather.gov) for Seymour (40.107, -88.427). Updated through the day.

Growing snapshot for Seymour

Last spring frost
Apr 23
First fall frost
Oct 13
Growing season
170 days
Hardiness zone
6a

More local growing data for Seymour: nearby ZIP 61875 weather · frost dates · planting calendar · Illinois frost dates

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Climate data from the nearest NOAA station, Champaign 9 Sw, Il (4.2 mi from Seymour). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.