Warsaw, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Warsaw, a city in Lee County, Illinois.
This Afternoon
71°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Cloudy. High near 71, with temperatures falling to around 69 in the afternoon. South wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.
7-day forecast for Warsaw
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 71°F | Chance Showers And Thunderstorms | 15 mph S | 42% |
| Tonight | 51°F | Chance Rain Showers | 10 to 15 mph SW | 38% |
| Wednesday | 57°F | Mostly Cloudy | 15 mph SW | 11% |
| Wednesday Night | 45°F | Mostly Cloudy | 10 mph SW | 1% |
| Thursday | 58°F | Partly Sunny | 10 mph W | 13% |
| Thursday Night | 45°F | Mostly Cloudy then Chance Rain Showers | 5 to 10 mph NW | 28% |
| Friday | 55°F | Mostly Cloudy | 5 to 10 mph N | 6% |
| Friday Night | 39°F | Partly Cloudy | 0 to 5 mph N | 0% |
| Saturday | 56°F | Partly Sunny | 0 to 5 mph W | 2% |
| Saturday Night | 39°F | Mostly Clear | 0 to 5 mph W | 2% |
| Sunday | 62°F | Sunny | 5 mph W | 9% |
| Sunday Night | 40°F | Mostly Clear | 5 mph W | 3% |
| Monday | 66°F | Sunny | 5 to 10 mph SW | 1% |
| Monday Night | 43°F | Mostly Clear | 5 mph W | 0% |
Forecast source: National Weather Service (api.weather.gov) for Warsaw (40.351, -91.428). Updated through the day.
Growing snapshot for Warsaw
Last spring frost
Apr 10
First fall frost
Oct 27
Growing season
198 days
Hardiness zone
6a
More local growing data for Warsaw: nearby ZIP 52632 weather · frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Keokuk Lock Dam 19, Ia (4.4 mi from Warsaw). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.