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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

WhenTempForecastWindPrecip
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

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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.