Ottosen, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Ottosen, a city in Humboldt County, Iowa.
This Afternoon
58°F
Chance Rain Showers
A chance of rain showers. Cloudy. High near 58, with temperatures falling to around 54 in the afternoon. North northwest wind around 14 mph, with gusts as high as 23 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Ottosen
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 58°F | Chance Rain Showers | 14 mph NNW | 30% |
| Tonight | 43°F | Rain Showers | 15 mph NW | 91% |
| Wednesday | 49°F | Rain Showers Likely | 14 to 17 mph WNW | 64% |
| Wednesday Night | 40°F | Rain Showers | 14 mph WNW | 82% |
| Thursday | 50°F | Rain Showers Likely | 15 mph NNW | 57% |
| Thursday Night | 35°F | Mostly Cloudy | 6 to 12 mph N | 7% |
| Friday | 49°F | Partly Sunny | 1 to 6 mph N | 0% |
| Friday Night | 31°F | Partly Cloudy | 1 mph SE | 1% |
| Saturday | 55°F | Mostly Sunny | 1 to 6 mph SW | 3% |
| Saturday Night | 35°F | Partly Cloudy | 5 mph W | 5% |
| Sunday | 59°F | Sunny | 7 mph W | 6% |
| Sunday Night | 37°F | Mostly Clear | 7 mph SSW | 2% |
| Monday | 63°F | Sunny | 7 to 12 mph WSW | 0% |
| Monday Night | 39°F | Mostly Clear | 7 mph WNW | 0% |
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 Nov 4, 2026.