Blair, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Blair, a city in Trempealeau County, Wisconsin.
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 for Blair
| 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 | 2 to 7 mph W | 19% |
| Wednesday | 78°F | Mostly Sunny | 1 to 5 mph NW | 1% |
| Wednesday Night | 53°F | Mostly Clear | 0 to 5 mph SW | 0% |
| Thursday | 83°F | Sunny | 0 to 7 mph S | 1% |
| Thursday Night | 59°F | Mostly Clear | 3 to 7 mph S | 1% |
| Friday | 86°F | Sunny | 3 to 12 mph S | 8% |
| Friday Night | 63°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 21% |
| Saturday | 86°F | Slight Chance Rain Showers then Mostly Sunny | 3 to 8 mph SW | 18% |
| Saturday Night | 66°F | Chance Showers And Thunderstorms | 3 to 8 mph SW | 39% |
| Sunday | 85°F | Chance Showers And Thunderstorms | 3 to 8 mph W | 39% |
| Sunday Night | 63°F | Chance Showers And Thunderstorms | 2 to 7 mph E | 34% |
| Monday | 84°F | Chance Rain Showers | 3 to 7 mph E | 30% |
| Monday Night | 63°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 6 mph NE | 28% |
Forecast source: National Weather Service (api.weather.gov) for Blair (44.327, -91.299). Updated through the day.
Growing snapshot for Blair
Last spring frost
May 9
First fall frost
Oct 1
Growing season
143 days
Hardiness zone
4b
More local growing data for Blair: nearby ZIP 54773 weather · frost dates · planting calendar · Wisconsin frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Blair, Wi (7.6 mi from Blair). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.