Quincy, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Quincy, a city in Adams County, Illinois.
This Afternoon
87°F
Sunny
Sunny, with a high near 87. East wind around 6 mph.
7-day forecast for Quincy
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 87°F | Sunny | 6 mph E | 12% |
| Tonight | 73°F | Partly Cloudy | 7 mph SE | 11% |
| 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% |
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 Sep 18, 2026.