Dupo, IL Weather & Growing Conditions
This Afternoon
73°F
Rain
Rain and a slight chance of thunderstorms. Cloudy. High near 73, with temperatures falling to around 66 in the afternoon. South wind around 13 mph, with gusts as high as 29 mph. Chance of precipitation is 90%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 73°F | Rain | 13 mph S | 90% |
| Tonight | 54°F | Rain | 8 to 15 mph SW | 95% |
| Wednesday | 63°F | Mostly Cloudy | 7 to 13 mph W | 6% |
| Wednesday Night | 46°F | Partly Cloudy | 6 mph SW | 0% |
| Thursday | 66°F | Sunny | 6 to 9 mph W | 1% |
| Thursday Night | 47°F | Mostly Cloudy | 6 mph NW | 10% |
| Friday | 57°F | Partly Sunny | 6 to 10 mph NW | 5% |
| Friday Night | 42°F | Partly Cloudy | 2 to 7 mph N | 1% |
| Saturday | 56°F | Mostly Sunny | 5 mph NW | 0% |
| Saturday Night | 39°F | Partly Cloudy | 2 mph W | 0% |
| Sunday | 61°F | Sunny | 2 to 6 mph W | 8% |
| Sunday Night | 39°F | Mostly Clear | 5 mph W | 5% |
| Monday | 66°F | Sunny | 3 to 7 mph SW | 2% |
| Monday Night | 43°F | Mostly Clear | 5 mph SW | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Dupo, IL
Last spring frost
Apr 6
First fall frost
Oct 27
Growing season
203 days
Hardiness zone
7a
Explore more for Dupo, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Cahokia, Il (4.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.