Nason, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Nason, a city in Jefferson County, Illinois.
Overnight
72°F
Mostly Clear
Mostly clear. Low around 72, with temperatures rising to around 74 overnight. South southeast wind around 2 mph.
7-day forecast for Nason
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 72°F | Mostly Clear | 2 mph SSE | 2% |
| Saturday | 99°F | Sunny | 2 to 7 mph SW | 4% |
| Saturday Night | 73°F | Partly Cloudy | 5 mph SSW | 2% |
| Sunday | 97°F | Mostly Sunny | 3 to 8 mph W | 14% |
| Sunday Night | 69°F | Mostly Cloudy then Chance Showers And Thunderstorms | 5 mph NNE | 31% |
| Monday | 87°F | Chance Showers And Thunderstorms | 5 to 12 mph NNE | 51% |
| Monday Night | 61°F | Chance Showers And Thunderstorms | 8 to 13 mph NNE | 51% |
| Tuesday | 76°F | Chance Showers And Thunderstorms then Partly Sunny | 10 to 14 mph NNE | 26% |
| Tuesday Night | 56°F | Partly Cloudy | 7 to 14 mph NNE | 6% |
| Wednesday | 76°F | Mostly Sunny | 7 to 10 mph N | 3% |
| Wednesday Night | 56°F | Partly Cloudy | 3 to 10 mph NNE | 2% |
| Thursday | 77°F | Mostly Sunny | 3 to 9 mph NNE | 2% |
| Thursday Night | 58°F | Partly Cloudy | 5 to 8 mph NNE | 2% |
| Friday | 78°F | Mostly Sunny | 5 to 9 mph NNE | 3% |
Forecast source: National Weather Service (api.weather.gov) for Nason (38.176, -88.966). Updated through the day.
Growing snapshot for Nason
Last spring frost
Apr 4
First fall frost
Oct 28
Growing season
206 days
Hardiness zone
6b
More local growing data for Nason: nearby ZIP 62816 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Benton 2 N, Il (10.8 mi from Nason). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.