Blairsburg, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Blairsburg, a city in Hamilton County, Iowa.
Overnight
43°F
Chance Rain Showers
A chance of rain showers. Cloudy. Low around 43, with temperatures rising to around 45 overnight. West northwest wind around 18 mph, with gusts as high as 25 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Blairsburg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 43°F | Chance Rain Showers | 18 mph WNW | 43% |
| Wednesday | 50°F | Chance Rain Showers | 17 mph W | 37% |
| Wednesday Night | 42°F | Chance Rain Showers | 14 mph W | 44% |
| Thursday | 51°F | Rain Showers Likely then Cloudy | 14 mph NW | 62% |
| Thursday Night | 36°F | Mostly Cloudy | 6 to 10 mph N | 8% |
| Friday | 48°F | Mostly Sunny | 3 to 7 mph NNE | 4% |
| Friday Night | 29°F | Partly Cloudy | 2 mph NE | 2% |
| Saturday | 51°F | Mostly Sunny | 1 to 5 mph SW | 0% |
| Saturday Night | 34°F | Mostly Clear | 5 mph W | 1% |
| Sunday | 57°F | Sunny | 6 mph W | 1% |
| Sunday Night | 36°F | Mostly Clear | 5 mph SW | 0% |
| Monday | 63°F | Sunny | 5 to 9 mph SW | 0% |
| Monday Night | 39°F | Mostly Clear | 5 mph WNW | 0% |
| Tuesday | 61°F | Mostly Sunny | 3 mph NW | 0% |
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 Nov 4, 2026.