Osceola County weather, town by town
5 places in Osceola County, Iowa, each with its own live forecast and radar, and where a station sits close enough, measured weather records.
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Measured at the NOAA stations serving these towns, daily records 1893 to 2026. Station extremes, not official state records.
Osceola County Weather Facts
Osceola County has 5 places on myweatherrock (5 cities), each with its own live forecast, hourly timeline, ten day outlook and radar. The hottest day in the station records is 110°F at Sanborn on July 17, 1936. The coldest night is -40°F at Sibley on February 9, 1899. The wettest day brought 6.62 inches of rain at Sanborn on July 22, 2010. The biggest single-day snow measured 20.98 inches at Sibley on February 18, 1962. Those are station measurements from NOAA's daily records, 1893 to 2026, not official state records. By area the largest place is Sibley, about 2 square miles.
About Osceola County weather
The map on the Now tab shows every Osceola County town's current temperature from our own server, one dot per town. Tap any dot, or type a town above, for that town's full forecast.
What the weather is usually like
Across the 5 Osceola County towns with station normals, the warmest month is July, when the day usually reaches 83°F, and the coldest is January, when the night usually falls to 5°F. May is the wettest, with rain on about 13 days. July afternoons run from about 82°F in Ashton to 85°F in Harris.
Means of the 1991 to 2020 station normals serving these towns, as published by NOAA; each town's page carries its own.
Where these numbers come from
- Current conditions and forecast: NOAA forecast grids decoded on our own server, corrected against the nearest reporting station and our own radar. Open-Meteo is consulted only as a fallback when our server is silent.
- Records: computed by myweatherrock from NOAA GHCN-Daily station records at the stations serving these towns. Measurements, not estimates.
- Warnings and alerts: the National Weather Service, passed through unchanged.
Osceola County weather records
Measured at the NOAA stations serving these towns, daily records 1893 to 2026. Station extremes, not official state records.
Common questions about Osceola County weather
- What is the hottest temperature recorded at a Osceola County station?
- 110°F at Sanborn on July 17, 1936, in the NOAA daily station records myweatherrock holds (1893 to 2026).
- What is the coldest temperature recorded at a Osceola County station?
- -40°F at Sibley on February 9, 1899.
- What is the most rain a Osceola County station has measured in one day?
- 6.62 inches at Sanborn on July 22, 2010.
- What is the biggest one-day snowfall at a Osceola County station?
- 20.98 inches at Sibley on February 18, 1962.
- How many Osceola County towns have a weather page here?
- 5: 5 cities. Each page carries current conditions, the hourly timeline, the ten day outlook, radar, and where a station sits close enough, measured records.
- Where does the Osceola County forecast come from?
- NOAA forecast grids (the National Weather Service digital forecast, the National Blend of Models, HRRR and GFS) decoded on our own server, corrected against the nearest reporting station and our own radar. Open-Meteo is consulted only as a fallback when our server is silent.
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