Blairsville, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Blairsville, a community in Williamson County, Illinois.
Overnight
56°F
Slight Chance Rain Showers
A slight chance of rain showers before 3am. Mostly cloudy. Low around 56, with temperatures rising to around 58 overnight. South southwest wind around 8 mph. Chance of precipitation is 20%.
7-day forecast for Blairsville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 56°F | Slight Chance Rain Showers | 8 mph SSW | 18% |
| Wednesday | 66°F | Partly Sunny | 5 to 9 mph WSW | 8% |
| Wednesday Night | 43°F | Partly Cloudy | 3 mph WSW | 0% |
| Thursday | 68°F | Sunny | 3 to 7 mph WSW | 0% |
| Thursday Night | 44°F | Partly Cloudy | 2 mph WNW | 1% |
| Friday | 59°F | Partly Sunny | 3 to 10 mph NNW | 0% |
| Friday Night | 37°F | Partly Cloudy | 2 to 6 mph N | 0% |
| Saturday | 56°F | Mostly Sunny | 5 mph N | 0% |
| Saturday Night | 33°F | Partly Cloudy | 1 mph NNW | 0% |
| Sunday | 61°F | Mostly Sunny | 1 to 6 mph NW | 0% |
| Sunday Night | 34°F | Clear | 2 mph NNW | 1% |
| Monday | 65°F | Sunny | 0 to 5 mph WSW | 0% |
| Monday Night | 38°F | Clear | 2 mph SW | 1% |
| Tuesday | 69°F | Sunny | 1 to 5 mph WSW | 1% |
Forecast source: National Weather Service (api.weather.gov) for Blairsville (37.811, -89.124). Updated through the day.
Growing snapshot for Blairsville
Last spring frost
Apr 9
First fall frost
Oct 22
Growing season
195 days
Hardiness zone
7a
More local growing data for Blairsville: nearby ZIP 62915 weather · frost dates · planting calendar · Illinois frost dates
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Climate data from the nearest NOAA station, Carbondale Sewage Plt, Il (4.4 mi from Blairsville). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.