Nason, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Nason, a city in Jefferson County, Illinois.
Overnight
56°F
Chance Rain Showers
A chance of rain showers before 4am. Mostly cloudy. Low around 56, with temperatures rising to around 58 overnight. South southwest wind around 10 mph. Chance of precipitation is 50%.
7-day forecast for Nason
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 56°F | Chance Rain Showers | 10 mph SSW | 47% |
| Wednesday | 66°F | Mostly Cloudy | 6 to 13 mph WSW | 11% |
| Wednesday Night | 43°F | Partly Cloudy | 3 mph WSW | 0% |
| Thursday | 68°F | Sunny | 3 to 9 mph WSW | 0% |
| Thursday Night | 45°F | Partly Cloudy | 2 mph WNW | 0% |
| Friday | 60°F | Partly Sunny | 3 to 13 mph NNW | 1% |
| Friday Night | 36°F | Partly Cloudy | 3 to 8 mph NNW | 0% |
| Saturday | 57°F | Mostly Sunny | 6 mph NNW | 0% |
| Saturday Night | 33°F | Partly Cloudy | 2 mph NNW | 0% |
| Sunday | 61°F | Sunny | 1 to 7 mph NW | 0% |
| Sunday Night | 34°F | Clear | 2 mph WNW | 1% |
| Monday | 65°F | Sunny | 0 to 6 mph WSW | 0% |
| Monday Night | 39°F | Clear | 3 mph SW | 1% |
| Tuesday | 69°F | Sunny | 5 mph W | 1% |
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 Nov 4, 2026.