Thor, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Thor, a city in Humboldt County, Iowa.
Tonight
44°F
Rain Showers
Rain showers. Cloudy. Low around 44, with temperatures rising to around 46 overnight. Northwest wind around 15 mph, with gusts as high as 21 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Thor
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 44°F | Rain Showers | 15 mph NW | 93% |
| Wednesday | 50°F | Rain Showers Likely | 15 to 18 mph W | 62% |
| Wednesday Night | 41°F | Rain Showers Likely | 15 mph WNW | 73% |
| Thursday | 50°F | Rain Showers Likely | 15 mph NNW | 60% |
| Thursday Night | 36°F | Slight Chance Rain Showers then Mostly Cloudy | 6 to 12 mph N | 16% |
| Friday | 50°F | Partly Sunny | 2 to 7 mph N | 0% |
| Friday Night | 32°F | Partly Cloudy | 2 mph SE | 1% |
| Saturday | 55°F | Mostly Sunny | 1 to 6 mph SW | 2% |
| Saturday Night | 36°F | Partly Cloudy | 5 mph W | 4% |
| Sunday | 60°F | Sunny | 7 mph W | 6% |
| Sunday Night | 38°F | Mostly Clear | 7 mph SW | 2% |
| Monday | 63°F | Sunny | 7 to 12 mph WSW | 0% |
| Monday Night | 39°F | Mostly Clear | 7 mph WNW | 0% |
| Tuesday | 60°F | Mostly Sunny | 7 mph WNW | 1% |
Forecast source: National Weather Service (api.weather.gov) for Thor (42.688, -94.050). Updated through the day.
Growing snapshot for Thor
Last spring frost
Apr 26
First fall frost
Oct 12
Growing season
169 days
Hardiness zone
5a
More local growing data for Thor: nearby ZIP 50591 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Dakota City, Ia (7.9 mi from Thor). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.