Monona County weather, town by town
10 places in Monona 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 1937 to 2026. Station extremes, not official state records.
Monona County Weather Facts
Monona County has 10 places on myweatherrock (10 cities), each with its own live forecast, hourly timeline, ten day outlook and radar. The hottest day in the station records is 106°F at Mapleton No.2 on July 29, 1947. The coldest night is -35°F at Mapleton No.2 on February 16, 2021. The wettest day brought 9.77 inches of rain at Mapleton No.2 on July 17, 1996. The biggest single-day snow measured 12.01 inches at Mapleton No.2 on March 5, 1963. Those are station measurements from NOAA's daily records, 1937 to 2026, not official state records. By area the largest place is Onawa, about 5 square miles.
About Monona County weather
The map on the Now tab shows every Monona 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 10 Monona County towns with station normals, the warmest month is July, when the day usually reaches 85°F, and the coldest is January, when the night usually falls to 10°F. May is the wettest, with rain on about 12 days.
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.
Monona County weather records
Measured at the NOAA stations serving these towns, daily records 1937 to 2026. Station extremes, not official state records.
Common questions about Monona County weather
- What is the hottest temperature recorded at a Monona County station?
- 106°F at Mapleton No.2 on July 29, 1947, in the NOAA daily station records myweatherrock holds (1937 to 2026).
- What is the coldest temperature recorded at a Monona County station?
- -35°F at Mapleton No.2 on February 16, 2021.
- What is the most rain a Monona County station has measured in one day?
- 9.77 inches at Mapleton No.2 on July 17, 1996.
- What is the biggest one-day snowfall at a Monona County station?
- 12.01 inches at Mapleton No.2 on March 5, 1963.
- How many Monona County towns have a weather page here?
- 10: 10 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 Monona 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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