Quincy, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Quincy, a city in Adams County, Illinois.
This Afternoon
70°F
Light Rain
Rain and a slight chance of thunderstorms. Cloudy. High near 70, with temperatures falling to around 66 in the afternoon. South wind around 16 mph, with gusts as high as 30 mph. Chance of precipitation is 100%.
7-day forecast for Quincy
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 70°F | Light Rain | 16 mph S | 99% |
| Tonight | 52°F | Chance Light Rain then Chance Rain Showers | 8 to 12 mph SW | 41% |
| Wednesday | 58°F | Chance Rain Showers then Cloudy | 9 to 14 mph SW | 12% |
| Wednesday Night | 45°F | Partly 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% |
Forecast source: National Weather Service (api.weather.gov) for Quincy (39.934, -91.379). Updated through the day.
Growing snapshot for Quincy
Last spring frost
Apr 8
First fall frost
Oct 30
Growing season
204 days
Hardiness zone
6a
More local growing data for Quincy: nearby ZIP 62301 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Adams
Bloomfield
Burton
Camp Point
Clayton
Coatsburg
Columbus
Fall Creek
Fowler
Golden
Kingston
La Prairie
Liberty
Lima
Loraine
Marcelline
Mendon
Paloma
Payson
Plainville
Richfield
Ursa
Climate data from the nearest NOAA station, Quincy Dam 21, Il (2.8 mi from Quincy). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.