Ottosen, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Ottosen, a city in Humboldt County, Iowa.
Today
76°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely. Mostly cloudy. High near 76, with temperatures falling to around 72 in the afternoon. North northwest wind 7 to 12 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Ottosen
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 76°F | Showers And Thunderstorms Likely | 7 to 12 mph NNW | 63% |
| Tonight | 56°F | Showers And Thunderstorms Likely then Mostly Cloudy | 2 to 8 mph N | 57% |
| Wednesday | 77°F | Mostly Sunny | 2 mph NE | 2% |
| Wednesday Night | 53°F | Mostly Clear | 3 mph SSE | 2% |
| Thursday | 82°F | Sunny | 2 to 7 mph S | 1% |
| Thursday Night | 60°F | Mostly Clear | 8 mph S | 3% |
| Friday | 86°F | Sunny | 6 to 13 mph SSW | 9% |
| Friday Night | 64°F | Slight Chance Showers And Thunderstorms | 6 to 13 mph S | 23% |
| Saturday | 89°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 16 mph SE | 26% |
| Sunday | 88°F | Chance Showers And Thunderstorms then Mostly Sunny | 12 mph SE | 26% |
| Sunday Night | 67°F | Slight Chance Showers And Thunderstorms | 8 to 12 mph SE | 30% |
| Monday | 87°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 9 to 14 mph E | 30% |
| Monday Night | 67°F | Slight Chance Showers And Thunderstorms | 10 to 16 mph NE | 31% |
Forecast source: National Weather Service (api.weather.gov) for Ottosen (42.898, -94.376). Updated through the day.
Growing snapshot for Ottosen
Last spring frost
Apr 30
First fall frost
Oct 6
Growing season
160 days
Hardiness zone
5a
More local growing data for Ottosen: nearby ZIP 50570 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Algona, Ia (13.9 mi from Ottosen). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.