Thor, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Thor, a city in Humboldt County, Iowa.
Today
77°F
Showers And Thunderstorms
Showers and thunderstorms. Mostly cloudy. High near 77, with temperatures falling to around 74 in the afternoon. North wind 8 to 12 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 |
|---|---|---|---|---|
| Today | 77°F | Showers And Thunderstorms | 8 to 12 mph N | 91% |
| Tonight | 57°F | Showers And Thunderstorms Likely | 3 to 8 mph N | 61% |
| Wednesday | 77°F | Partly Sunny | 3 mph NNE | 6% |
| Wednesday Night | 52°F | Mostly Clear | 3 mph SE | 2% |
| Thursday | 82°F | Sunny | 1 to 6 mph S | 1% |
| Thursday Night | 59°F | Mostly Clear | 7 mph S | 1% |
| Friday | 85°F | Sunny | 5 to 12 mph S | 8% |
| Friday Night | 65°F | Chance Showers And Thunderstorms | 6 to 10 mph S | 26% |
| Saturday | 88°F | Slight Chance Showers And Thunderstorms then Sunny | 5 to 15 mph S | 15% |
| Saturday Night | 68°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph SSE | 21% |
| Sunday | 88°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 12 mph SE | 21% |
| Sunday Night | 69°F | Slight Chance Showers And Thunderstorms | 10 mph SE | 32% |
| Monday | 87°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 10 to 14 mph SE | 32% |
| Monday Night | 68°F | Slight Chance Showers And Thunderstorms | 9 to 15 mph ENE | 31% |
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 Aug 4, 2026.