Blair, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Blair, a city in Trempealeau County, Wisconsin.
Overnight
53°F
Showers And Thunderstorms
Showers and thunderstorms before 5am, then a chance of showers and thunderstorms. Cloudy, with a low around 53. East wind around 15 mph, with gusts as high as 29 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
7-day forecast for Blair
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 53°F | Showers And Thunderstorms | 15 mph E | 82% |
| Saturday | 61°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 8 to 12 mph E | 57% |
| Saturday Night | 51°F | Chance Rain Showers then Mostly Cloudy | 8 to 12 mph NE | 25% |
| Sunday | 68°F | Partly Sunny | 10 to 14 mph NE | 1% |
| Sunday Night | 44°F | Mostly Cloudy | 6 to 10 mph NE | 2% |
| Monday | 63°F | Mostly Cloudy | 6 to 9 mph NE | 4% |
| Monday Night | 41°F | Mostly Cloudy | 3 to 7 mph E | 3% |
| Tuesday | 63°F | Mostly Sunny | 5 to 8 mph E | 3% |
| Tuesday Night | 40°F | Mostly Clear | 5 mph E | 2% |
| Wednesday | 66°F | Sunny | 2 to 6 mph E | 1% |
| Wednesday Night | 43°F | Mostly Clear | 2 mph E | 3% |
| Thursday | 68°F | Mostly Sunny | 1 to 5 mph E | 6% |
| Thursday Night | 45°F | Partly Cloudy | 1 mph NE | 3% |
| Friday | 70°F | Mostly Sunny | 1 to 5 mph SE | 4% |
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 Sep 19, 2026.