Assumption, IL Weather & Growing Conditions
Today
87°F
Sunny
Sunny, with a high near 87. South wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 87°F | Sunny | 5 mph S | 0% |
| Tonight | 66°F | Mostly Clear | 5 mph SSE | 0% |
| Wednesday | 88°F | Mostly Sunny | 3 to 7 mph S | 6% |
| Wednesday Night | 67°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 6 mph S | 71% |
| Thursday | 83°F | Showers And Thunderstorms | 3 to 7 mph SSW | 79% |
| Thursday Night | 66°F | Chance Showers And Thunderstorms | 1 to 5 mph S | 25% |
| Friday | 84°F | Slight Chance Showers And Thunderstorms then Partly Sunny | 3 mph SW | 16% |
| Friday Night | 66°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 2 mph SSW | 23% |
| Saturday | 86°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 5 mph SSW | 23% |
| Saturday Night | 70°F | Mostly Clear | 3 to 7 mph S | 12% |
| Sunday | 89°F | Sunny | 7 to 12 mph SSW | 6% |
| Sunday Night | 71°F | Mostly Clear | 10 mph SSW | 9% |
| Monday | 90°F | Mostly Sunny | 10 mph SSW | 11% |
| Monday Night | 72°F | Slight Chance Showers And Thunderstorms | 9 mph SW | 22% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Assumption, IL
Last spring frost
Apr 17
First fall frost
Oct 23
Growing season
188 days
Hardiness zone
6a
Explore more for Assumption, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Pana, Il (11.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.