Marshall County weather, town by town
14 places in Marshall 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.
Marshall County Weather Facts
Marshall County has 14 places on myweatherrock (13 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 112°F at Marshalltown on July 14, 1936. The coldest night is -35°F at Marshalltown on February 3, 1996. The wettest day brought 6.92 inches of rain at Grinnell 3 Sw on August 5, 1970. The biggest single-day snow measured 17.8 inches at Marshalltown on March 6, 1959. Those are station measurements from NOAA's daily records, 1893 to 2026, not official state records. By area the largest place is Marshalltown, about 19 square miles.
About Marshall County weather
The map on the Now tab shows every Marshall 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 14 Marshall County towns with station normals, the warmest month is July, when the day usually reaches 84°F, and the coldest is January, when the night usually falls to 10°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.
Marshall 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 Marshall County weather
- What is the hottest temperature recorded at a Marshall County station?
- 112°F at Marshalltown on July 14, 1936, in the NOAA daily station records myweatherrock holds (1893 to 2026).
- What is the coldest temperature recorded at a Marshall County station?
- -35°F at Marshalltown on February 3, 1996.
- What is the most rain a Marshall County station has measured in one day?
- 6.92 inches at Grinnell 3 Sw on August 5, 1970.
- What is the biggest one-day snowfall at a Marshall County station?
- 17.8 inches at Marshalltown on March 6, 1959.
- How many Marshall County towns have a weather page here?
- 14: 13 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 Marshall 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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