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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.

Tonight
59°F
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms before 5am. Cloudy, with a low around 59. North wind 9 to 13 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.

7-day forecast for Blairsburg

WhenTempForecastWindPrecip
Tonight 59°F Slight Chance Showers And Thunderstorms 9 to 13 mph N 19%
Sunday 65°F Chance Drizzle 13 to 16 mph NE 34%
Sunday Night 53°F Chance Drizzle then Chance Rain Showers 14 mph ENE 51%
Monday 58°F Rain Showers 14 mph NE 78%
Monday Night 49°F Rain Showers 10 mph NE 78%
Tuesday 60°F Slight Chance Rain Showers then Partly Sunny 9 mph ENE 19%
Tuesday Night 46°F Partly Cloudy 6 mph ENE 4%
Wednesday 64°F Mostly Sunny 6 mph E 1%
Wednesday Night 50°F Partly Cloudy 3 mph ESE 9%
Thursday 67°F Slight Chance Rain Showers 6 mph SE 22%
Thursday Night 55°F Slight Chance Rain Showers 3 mph SE 21%
Friday 70°F Slight Chance Rain Showers then Mostly Cloudy 2 to 6 mph ESE 18%
Friday Night 57°F Mostly Cloudy 5 mph ESE 9%
Saturday 69°F Chance Rain Showers 5 to 9 mph SE 29%

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 20, 2026.