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
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| 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
Nearby towns & communities
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.