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Blairsburg, IA Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Blairsburg, a city in Hamilton County, Iowa.

Overnight
66°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Cloudy. Low around 66, with temperatures rising to around 68 overnight. South southeast wind around 8 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch possible.

7-day forecast for Blairsburg

WhenTempForecastWindPrecip
Overnight 66°F Chance Showers And Thunderstorms 8 mph SSE 44%
Saturday 76°F Chance Showers And Thunderstorms then Patchy Fog 8 mph WNW 44%
Saturday Night 59°F Slight Chance Showers And Thunderstorms 8 to 12 mph N 23%
Sunday 65°F Chance Drizzle 15 mph NE 25%
Sunday Night 53°F Chance Rain Showers 13 mph ENE 38%
Monday 61°F Chance Rain Showers 10 to 14 mph ENE 50%
Monday Night 48°F Chance Rain Showers 7 to 10 mph ENE 50%
Tuesday 60°F Mostly Sunny 6 to 9 mph ENE 11%
Tuesday Night 45°F Partly Cloudy 6 mph E 1%
Wednesday 65°F Sunny 6 mph E 1%
Wednesday Night 50°F Partly Cloudy 3 mph ESE 7%
Thursday 66°F Slight Chance Rain Showers 5 mph SE 15%
Thursday Night 53°F Mostly Cloudy 3 mph ESE 8%
Friday 68°F Partly Sunny 6 mph ESE 7%

Forecast source: National Weather Service (api.weather.gov) for Blairsburg (42.478, -93.643). Updated through the day.

Growing snapshot for Blairsburg

Last spring frost
May 3
First fall frost
Oct 2
Growing season
150 days
Hardiness zone
5a

More local growing data for Blairsburg: nearby ZIP 50034 weather · frost dates · planting calendar · Iowa frost dates

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Climate data from the nearest NOAA station, Webster City, Ia (9.3 mi from Blairsburg). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.