Quincy, IL Weather & Growing Conditions
Tonight
73°F
Partly Cloudy
Partly cloudy, with a low around 73. Southeast wind around 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 73°F | Partly Cloudy | 7 mph SE | 9% |
| Saturday | 92°F | Partly Sunny | 7 mph SW | 7% |
| Saturday Night | 70°F | Mostly Cloudy then Chance Showers And Thunderstorms | 5 mph W | 37% |
| Sunday | 81°F | Showers And Thunderstorms Likely | 3 to 7 mph NW | 67% |
| Sunday Night | 63°F | Showers And Thunderstorms Likely | 9 mph NE | 73% |
| Monday | 68°F | Showers And Thunderstorms Likely | 9 mph NE | 73% |
| Monday Night | 57°F | Chance Showers And Thunderstorms | 8 mph NE | 45% |
| Tuesday | 65°F | Slight Chance Rain Showers then Mostly Cloudy | 9 mph NE | 22% |
| Tuesday Night | 52°F | Mostly Cloudy | 7 mph N | 5% |
| Wednesday | 69°F | Mostly Sunny | 6 mph N | 1% |
| Wednesday Night | 55°F | Partly Cloudy | 5 mph NE | 1% |
| Thursday | 71°F | Mostly Sunny | 5 mph NE | 5% |
| Thursday Night | 58°F | Partly Cloudy | 3 mph NE | 5% |
| Friday | 72°F | Mostly Sunny | 5 mph NE | 6% |
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 Sep 19, 2026.