Blairstown, IA Weather & Growing Conditions
This Afternoon
77°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 3pm, then showers and thunderstorms likely. Partly sunny, with a high near 77. Southwest wind around 5 mph. Chance of precipitation is 70%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 77°F | Chance Showers And Thunderstorms | 5 mph SW | 69% |
| Tonight | 61°F | Showers And Thunderstorms Likely | 5 to 10 mph N | 72% |
| Sunday | 66°F | Chance Rain Showers | 10 to 15 mph NE | 48% |
| Sunday Night | 55°F | Chance Rain Showers | 10 mph NE | 50% |
| Monday | 61°F | Rain Showers Likely | 10 mph NE | 73% |
| Monday Night | 51°F | Rain Showers Likely | 10 mph NE | 73% |
| Tuesday | 60°F | Chance Rain Showers | 10 mph NE | 31% |
| Tuesday Night | 47°F | Partly Cloudy | 5 mph NE | 7% |
| Wednesday | 63°F | Mostly Sunny | 5 mph NE | 1% |
| Wednesday Night | 51°F | Partly Cloudy | 0 to 5 mph E | 2% |
| Thursday | 66°F | Partly Sunny | 0 to 5 mph E | 14% |
| Thursday Night | 55°F | Slight Chance Rain Showers | 0 mph | 23% |
| Friday | 69°F | Slight Chance Rain Showers then Partly Sunny | 0 to 5 mph E | 18% |
| Friday Night | 56°F | Mostly Cloudy | 0 to 5 mph E | 12% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Blairstown, IA
Last spring frost
Apr 28
First fall frost
Oct 10
Growing season
165 days
Hardiness zone
5a
Explore more for Blairstown, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Belle Plaine, Ia (9.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.