Quincy, IL Weather & Growing Conditions
Tonight
53°F
Slight Chance Light Rain then Slight Chance Drizzle
A slight chance of rain before 9pm, then a slight chance of drizzle. Cloudy, with a low around 53. Southwest wind around 12 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 53°F | Slight Chance Light Rain then Slight Chance Drizzle | 12 mph SW | 15% |
| Wednesday | 58°F | Slight Chance Drizzle then Cloudy | 9 to 14 mph W | 12% |
| Wednesday Night | 45°F | Mostly Cloudy | 8 mph SW | 1% |
| Thursday | 58°F | Mostly Sunny | 7 to 10 mph W | 8% |
| Thursday Night | 45°F | Mostly Cloudy then Slight Chance T-storms | 7 mph NW | 16% |
| Friday | 55°F | Partly Sunny | 8 mph N | 4% |
| Friday Night | 39°F | Partly Cloudy | 1 to 6 mph N | 2% |
| Saturday | 55°F | Partly Sunny | 3 mph NW | 1% |
| Saturday Night | 39°F | Mostly Clear | 3 mph W | 3% |
| Sunday | 61°F | Sunny | 6 mph W | 9% |
| Sunday Night | 40°F | Mostly Clear | 5 mph W | 2% |
| Monday | 66°F | Sunny | 5 to 8 mph SW | 2% |
| Monday Night | 44°F | Mostly Clear | 5 mph W | 0% |
| Tuesday | 67°F | Sunny | 5 mph NW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Quincy, IL
Last spring frost
Apr 8
First fall frost
Oct 30
Growing season
204 days
Hardiness zone
6a
Explore more for Quincy, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Quincy Dam 21, Il (2.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.