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

When	Temp	Forecast	Wind	Precip
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

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

Nearby towns & communities

Bondville Broadlands Champaign Dewey Fisher Foosland Gifford Homer Ivesdale Lake of the Woods Longview Ludlow Mahomet Ogden Penfield Pesotum Philo Rantoul Royal Sadorus Savoy Sidney St. Joseph Thomasboro Tolono Urbana

All Illinois locations ›

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.