Blair, WI Weather & Growing Conditions
Today
79°F
Mostly Cloudy then Isolated Rain Showers
Isolated rain showers after 5pm. Mostly cloudy. High near 79, with temperatures falling to around 77 in the afternoon. West wind around 9 mph. Chance of precipitation is 20%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 79°F | Mostly Cloudy then Isolated Rain Showers | 9 mph W | 15% |
| Tonight | 57°F | Isolated Rain Showers then Mostly Cloudy | 1 to 6 mph W | 21% |
| Wednesday | 79°F | Mostly Sunny | 1 to 5 mph NW | 1% |
| Wednesday Night | 53°F | Mostly Clear | 0 to 3 mph SW | 0% |
| Thursday | 84°F | Sunny | 0 to 7 mph SW | 1% |
| Thursday Night | 58°F | Mostly Clear | 2 to 6 mph SW | 1% |
| Friday | 86°F | Sunny | 2 to 10 mph SW | 8% |
| Friday Night | 63°F | Slight Chance Showers And Thunderstorms | 3 to 9 mph SW | 21% |
| Saturday | 86°F | Slight Chance Showers And Thunderstorms | 3 to 8 mph SW | 17% |
| Saturday Night | 65°F | Chance Showers And Thunderstorms | 3 to 8 mph W | 39% |
| Sunday | 86°F | Chance Showers And Thunderstorms | 3 to 8 mph W | 39% |
| Sunday Night | 63°F | Chance Showers And Thunderstorms | 1 to 7 mph E | 36% |
| Monday | 84°F | Chance Rain Showers then Slight Chance Showers And Thunderstorms | 2 to 7 mph E | 30% |
| Monday Night | 63°F | Slight Chance Showers And Thunderstorms | 2 to 6 mph NE | 28% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Blair, WI
Last spring frost
May 9
First fall frost
Oct 1
Growing season
143 days
Hardiness zone
4b
Explore more for Blair, WI: full frost dates · planting calendar · Wisconsin frost dates
Climate data from the nearest NOAA station, Blair, Wi (1.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.