Polk County weather, town by town
18 places in Polk 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 1945 to 2026. Station extremes, not official state records.
Polk County Weather Facts
Polk County has 18 places on myweatherrock (17 cities, 1 census-designated places), each with its own live forecast, hourly timeline, ten day outlook and radar. The hottest day in the station records is 108°F at Des Moines Intl Ap on August 16, 1983. The coldest night is -27°F at Des Moines Wsfo-Johnston on February 2, 1996. The wettest day brought 6.18 inches of rain at Des Moines Intl Ap on August 27, 1975. The biggest single-day snow measured 20 inches at Des Moines 4.5 Wnw on December 9, 2009. Those are station measurements from NOAA's daily records, 1945 to 2026, not official state records. By area the largest place is Des Moines, about 88 square miles.
About Polk County weather
The map on the Now tab shows every Polk 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 18 Polk 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 13°F. May is the wettest, with rain on about 13 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.
Polk County weather records
Measured at the NOAA stations serving these towns, daily records 1945 to 2026. Station extremes, not official state records.
Common questions about Polk County weather
- What is the hottest temperature recorded at a Polk County station?
- 108°F at Des Moines Intl Ap on August 16, 1983, in the NOAA daily station records myweatherrock holds (1945 to 2026).
- What is the coldest temperature recorded at a Polk County station?
- -27°F at Des Moines Wsfo-Johnston on February 2, 1996.
- What is the most rain a Polk County station has measured in one day?
- 6.18 inches at Des Moines Intl Ap on August 27, 1975.
- What is the biggest one-day snowfall at a Polk County station?
- 20 inches at Des Moines 4.5 Wnw on December 9, 2009.
- How many Polk County towns have a weather page here?
- 18: 17 cities, 1 census-designated places. 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 Polk 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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