Seymour, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Seymour, a community in Champaign County, Illinois.
Overnight
69°F
Mostly Cloudy
Mostly cloudy, with a low around 69. South southeast wind around 8 mph.
7-day forecast for Seymour
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 69°F | Mostly Cloudy | 8 mph SSE | 12% |
| Saturday | 88°F | Chance Showers And Thunderstorms | 7 mph SSE | 40% |
| Saturday Night | 68°F | Mostly Cloudy then Slight Chance Showers And Thunderstorms | 7 mph SSW | 24% |
| Sunday | 80°F | Chance Showers And Thunderstorms | 5 to 14 mph N | 65% |
| Sunday Night | 58°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 16 mph NE | 61% |
| Monday | 68°F | Showers And Thunderstorms Likely | 15 to 18 mph ENE | 70% |
| Monday Night | 53°F | Chance Rain Showers | 14 to 18 mph NE | 51% |
| Tuesday | 66°F | Chance Rain Showers | 17 mph NE | 33% |
| Tuesday Night | 51°F | Chance Showers And Thunderstorms then Mostly Cloudy | 9 to 16 mph NNE | 33% |
| Wednesday | 68°F | Mostly Sunny | 13 mph NNE | 5% |
| Wednesday Night | 52°F | Partly Cloudy | 7 to 13 mph NNE | 5% |
| Thursday | 70°F | Partly Sunny | 10 mph NNE | 3% |
| Thursday Night | 54°F | Partly Cloudy | 6 to 10 mph NNE | 3% |
| Friday | 73°F | Mostly Sunny | 7 to 12 mph NE | 3% |
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
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
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.