Seymour, IL Weather & Growing Conditions

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

Today

84°F

Patchy Fog then Sunny

Patchy fog before 9am. Sunny, with a high near 84. South wind around 6 mph.

7-day forecast for Seymour

When	Temp	Forecast	Wind	Precip
Today	84°F	Patchy Fog then Sunny	6 mph S	0%
Tonight	65°F	Mostly Clear	5 mph SSE	0%
Wednesday	85°F	Mostly Sunny	3 to 8 mph S	9%
Wednesday Night	67°F	Chance Showers And Thunderstorms	6 mph S	81%
Thursday	81°F	Showers And Thunderstorms	7 mph SSW	81%
Thursday Night	65°F	Chance Showers And Thunderstorms	6 mph S	35%
Friday	82°F	Partly Sunny	5 mph SSW	14%
Friday Night	66°F	Slight Chance Showers And Thunderstorms	3 mph SSW	24%
Saturday	84°F	Slight Chance Rain Showers then Mostly Sunny	7 mph SSW	18%
Saturday Night	69°F	Mostly Clear	5 to 9 mph SSW	14%
Sunday	86°F	Sunny	9 to 14 mph SSW	9%
Sunday Night	71°F	Partly Cloudy	13 mph SSW	11%
Monday	87°F	Slight Chance Showers And Thunderstorms	12 mph SW	17%
Monday Night	71°F	Slight Chance Showers And Thunderstorms	12 mph SW	28%

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 Aug 4, 2026.