Nason, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Nason, a city in Jefferson County, Illinois.
Today
88°F
Sunny
Sunny. High near 88, with temperatures falling to around 85 in the afternoon. Southeast wind around 1 mph.
7-day forecast for Nason
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 88°F | Sunny | 1 mph SE | 0% |
| Tonight | 65°F | Mostly Clear | 1 mph ENE | 0% |
| Wednesday | 90°F | Sunny | 1 mph SSW | 0% |
| Wednesday Night | 70°F | Partly Cloudy | 2 mph S | 13% |
| Thursday | 89°F | Chance Showers And Thunderstorms | 1 to 5 mph SSW | 35% |
| Thursday Night | 70°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 3 mph S | 60% |
| Friday | 88°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 3 mph SW | 60% |
| Friday Night | 70°F | Chance Showers And Thunderstorms | 2 mph SW | 44% |
| Saturday | 90°F | Chance Showers And Thunderstorms | 3 mph SSW | 44% |
| Saturday Night | 71°F | Partly Cloudy | 3 mph SSW | 13% |
| Sunday | 92°F | Mostly Sunny | 3 to 7 mph SSW | 7% |
| Sunday Night | 73°F | Mostly Clear | 7 mph SSW | 4% |
| Monday | 93°F | Sunny | 5 to 8 mph SSW | 5% |
| Monday Night | 74°F | Mostly Clear | 7 mph SSW | 9% |
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 Aug 4, 2026.