Quincy, IL Weather & Growing Conditions
Today
89°F
Sunny
Sunny, with a high near 89. South wind around 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 89°F | Sunny | 6 mph S | 0% |
| Tonight | 70°F | Partly Cloudy | 6 mph SE | 13% |
| Wednesday | 85°F | Scattered Showers And Thunderstorms | 5 mph S | 52% |
| Wednesday Night | 68°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 6 mph NE | 90% |
| Thursday | 83°F | Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 mph SE | 90% |
| Thursday Night | 67°F | Partly Cloudy | 3 mph SE | 9% |
| Friday | 86°F | Mostly Sunny | 2 mph S | 9% |
| Friday Night | 68°F | Chance Showers And Thunderstorms | 3 mph S | 32% |
| Saturday | 89°F | Slight Chance Showers And Thunderstorms then Sunny | 5 mph SW | 23% |
| Saturday Night | 73°F | Mostly Clear | 5 to 8 mph S | 6% |
| Sunday | 91°F | Sunny | 10 mph SW | 3% |
| Sunday Night | 73°F | Mostly Clear | 9 mph S | 9% |
| Monday | 91°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 7 to 10 mph SW | 15% |
| Monday Night | 74°F | Slight Chance Showers And Thunderstorms | 9 mph S | 23% |
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 (4.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.