Blair, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Blair, a city in Trempealeau County, Wisconsin.
This Afternoon
66°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely. Cloudy. High near 66, with temperatures falling to around 63 in the afternoon. South wind around 7 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Blair
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 66°F | Showers And Thunderstorms Likely | 7 mph S | 63% |
| Tonight | 54°F | Rain Showers | 8 mph SE | 98% |
| Wednesday | 58°F | Rain Showers | 7 to 12 mph S | 90% |
| Wednesday Night | 44°F | Rain Showers | 12 mph W | 98% |
| Thursday | 49°F | Rain Showers Likely | 13 mph NW | 67% |
| Thursday Night | 34°F | Mostly Cloudy | 7 to 13 mph N | 8% |
| Friday | 47°F | Partly Sunny | 2 to 9 mph N | 1% |
| Friday Night | 27°F | Partly Cloudy | 1 mph N | 1% |
| Saturday | 52°F | Mostly Sunny | 0 to 5 mph NW | 1% |
| Saturday Night | 32°F | Partly Cloudy | 3 mph W | 9% |
| Sunday | 57°F | Slight Chance Rain Showers then Mostly Sunny | 3 to 8 mph W | 15% |
| Sunday Night | 33°F | Mostly Clear | 3 mph SW | 3% |
| Monday | 59°F | Mostly Sunny | 3 to 10 mph SW | 0% |
| Monday Night | 36°F | Partly Cloudy | 6 mph W | 1% |
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 Nov 4, 2026.