Thor, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Thor, a city in Humboldt County, Iowa.
Today
75°F
Patchy Fog
Patchy fog and a chance of showers and thunderstorms before 4pm. Mostly cloudy. High near 75, with temperatures falling to around 73 in the afternoon. North wind 5 to 9 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Thor
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 75°F | Patchy Fog | 5 to 9 mph N | 38% |
| Tonight | 58°F | Slight Chance Rain Showers | 9 to 13 mph NNE | 18% |
| Sunday | 67°F | Chance Drizzle | 15 mph NE | 28% |
| Sunday Night | 53°F | Chance Rain Showers | 12 mph ENE | 46% |
| Monday | 61°F | Chance Rain Showers | 9 to 13 mph ENE | 50% |
| Monday Night | 48°F | Chance Rain Showers | 6 to 9 mph ENE | 39% |
| Tuesday | 61°F | Mostly Sunny | 7 mph ENE | 8% |
| Tuesday Night | 44°F | Mostly Clear | 2 to 6 mph E | 0% |
| Wednesday | 66°F | Sunny | 5 mph ESE | 1% |
| Wednesday Night | 49°F | Partly Cloudy | 3 mph ESE | 12% |
| Thursday | 68°F | Slight Chance Rain Showers | 2 to 6 mph SE | 16% |
| Thursday Night | 53°F | Mostly Cloudy | 3 mph SE | 7% |
| Friday | 70°F | Partly Sunny | 2 to 7 mph SE | 7% |
| Friday Night | 54°F | Mostly Cloudy | 5 mph SE | 11% |
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 Sep 19, 2026.