Annawan, IL Weather & Growing Conditions
Today
86°F
Mostly Sunny
Mostly sunny, with a high near 86. Southwest wind 5 to 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 86°F | Mostly Sunny | 5 to 10 mph SW | 2% |
| Tonight | 68°F | Showers And Thunderstorms Likely | 5 mph S | 59% |
| Wednesday | 79°F | Showers And Thunderstorms Likely | 5 mph W | 76% |
| Wednesday Night | 63°F | Showers And Thunderstorms | 0 to 5 mph N | 82% |
| Thursday | 79°F | Slight Chance Showers And Thunderstorms | 5 mph NE | 54% |
| Thursday Night | 61°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 0 to 5 mph E | 18% |
| Friday | 81°F | Mostly Sunny | 0 to 5 mph SE | 8% |
| Friday Night | 64°F | Mostly Clear | 0 to 5 mph S | 9% |
| Saturday | 84°F | Sunny | 5 to 10 mph SW | 9% |
| Saturday Night | 70°F | Mostly Clear | 5 to 10 mph S | 13% |
| Sunday | 86°F | Sunny | 10 to 15 mph SW | 13% |
| Sunday Night | 70°F | Slight Chance Showers And Thunderstorms | 10 mph S | 33% |
| Monday | 86°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 10 to 15 mph S | 33% |
| Monday Night | 70°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 10 to 15 mph SW | 36% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Annawan, IL
Last spring frost
Apr 24
First fall frost
Oct 17
Growing season
175 days
Hardiness zone
5b
Explore more for Annawan, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Kewanee 1 E, Il (12.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.