Annawan, IL Weather & Growing Conditions
Today
58°F
Slight Chance Rain Showers then Cloudy
A slight chance of rain showers before 8am. Cloudy. High near 58, with temperatures falling to around 56 in the afternoon. Southwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 58°F | Slight Chance Rain Showers then Cloudy | 15 mph SW | 17% |
| Tonight | 46°F | Mostly Cloudy | 10 to 15 mph SW | 12% |
| Thursday | 56°F | Chance Rain Showers | 10 to 15 mph W | 39% |
| Thursday Night | 41°F | Chance Rain Showers then Mostly Cloudy | 10 mph NW | 26% |
| Friday | 51°F | Partly Sunny | 5 to 10 mph N | 6% |
| Friday Night | 31°F | Partly Cloudy | 0 to 5 mph N | 0% |
| Saturday | 52°F | Sunny | 0 to 5 mph NW | 0% |
| Saturday Night | 33°F | Mostly Clear | 0 to 5 mph W | 2% |
| Sunday | 57°F | Sunny | 5 to 10 mph W | 2% |
| Sunday Night | 35°F | Clear | 0 to 5 mph W | 1% |
| Monday | 63°F | Sunny | 0 to 10 mph SW | 0% |
| Monday Night | 39°F | Mostly Clear | 5 mph W | 0% |
| Tuesday | 64°F | Sunny | 5 mph NW | 0% |
| Tuesday Night | 39°F | Partly Cloudy | 0 mph | 0% |
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 (12.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.