Dupo, IL Weather & Growing Conditions
Overnight
74°F
Clear
Clear, with a low around 74. South wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 74°F | Clear | 5 mph S | 3% |
| Saturday | 97°F | Mostly Sunny | 3 to 8 mph SW | 4% |
| Saturday Night | 74°F | Partly Cloudy | 3 to 7 mph S | 4% |
| Sunday | 93°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 6 mph W | 27% |
| Sunday Night | 68°F | Showers And Thunderstorms Likely | 6 to 9 mph NE | 61% |
| Monday | 79°F | Showers And Thunderstorms Likely | 7 to 10 mph NE | 64% |
| Monday Night | 60°F | Showers And Thunderstorms Likely | 7 to 10 mph N | 57% |
| Tuesday | 71°F | Slight Chance Rain Showers then Partly Sunny | 12 mph N | 20% |
| Tuesday Night | 55°F | Mostly Cloudy | 6 to 12 mph N | 5% |
| Wednesday | 73°F | Mostly Sunny | 9 mph N | 1% |
| Wednesday Night | 56°F | Partly Cloudy | 3 to 8 mph N | 0% |
| Thursday | 75°F | Mostly Sunny | 7 mph N | 1% |
| Thursday Night | 59°F | Partly Cloudy | 6 mph NE | 4% |
| Friday | 77°F | Partly Sunny | 3 to 7 mph NE | 6% |
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 Sep 19, 2026.