Poplar Grove, IL Weather & Growing Conditions
Overnight
46°F
Areas Of Drizzle
Areas of drizzle. Cloudy. Low around 46, with temperatures rising to around 48 overnight. Southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 46°F | Areas Of Drizzle | 10 to 15 mph SW | 34% |
| Thursday | 51°F | Chance Rain Showers | 10 to 15 mph WNW | 51% |
| Thursday Night | 36°F | Mostly Cloudy | 10 to 15 mph N | 10% |
| Friday | 47°F | Partly Sunny | 10 to 15 mph N | 0% |
| Friday Night | 28°F | Mostly Clear | 0 to 5 mph NNW | 0% |
| Saturday | 50°F | Sunny | 0 to 5 mph NW | 0% |
| Saturday Night | 30°F | Mostly Clear | 0 to 5 mph W | 0% |
| Sunday | 57°F | Sunny | 5 to 10 mph W | 1% |
| Sunday Night | 33°F | Mostly Clear | 0 to 5 mph W | 0% |
| Monday | 60°F | Sunny | 0 to 10 mph SW | 0% |
| Monday Night | 38°F | Clear | 5 to 10 mph WSW | 0% |
| Tuesday | 60°F | Sunny | 5 mph WNW | 1% |
| Tuesday Night | 36°F | Partly Cloudy | 0 to 5 mph NNW | 1% |
| Veterans Day | 59°F | Mostly Sunny | 0 to 5 mph NW | 2% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Poplar Grove, IL
Last spring frost
Apr 30
First fall frost
Oct 10
Growing season
161 days
Hardiness zone
5b
Explore more for Poplar Grove, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Clinton Wwtp, Wi (10.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 5, 2026.