Dumont, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Dumont, a city in Butler County, Iowa.
Tonight
64°F
Patchy Fog
Patchy fog and showers and thunderstorms likely before 1am, then patchy fog and showers and thunderstorms. Some of the storms could produce heavy rain. Cloudy. Low around 64, with temperatures rising to around 67 overnight. Southeast wind 6 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between 1 and 2 inches possible.
7-day forecast for Dumont
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 64°F | Patchy Fog | 6 to 10 mph SE | 77% |
| Saturday | 76°F | Patchy Fog | 8 mph W | 53% |
| Saturday Night | 58°F | Chance Showers And Thunderstorms | 10 mph N | 31% |
| Sunday | 66°F | Chance Rain Showers | 10 to 14 mph NE | 31% |
| Sunday Night | 52°F | Chance Rain Showers | 8 to 13 mph ENE | 26% |
| Monday | 60°F | Chance Rain Showers | 13 mph ENE | 52% |
| Monday Night | 47°F | Chance Rain Showers | 6 to 10 mph ENE | 50% |
| Tuesday | 60°F | Slight Chance Rain Showers then Partly Sunny | 8 mph ENE | 22% |
| Tuesday Night | 45°F | Partly Cloudy | 1 to 5 mph ENE | 3% |
| Wednesday | 64°F | Mostly Sunny | 3 mph E | 1% |
| Wednesday Night | 48°F | Partly Cloudy | 2 mph ESE | 5% |
| Thursday | 67°F | Slight Chance Rain Showers | 2 mph SE | 15% |
| Thursday Night | 51°F | Mostly Cloudy | 1 mph SE | 10% |
| Friday | 67°F | Mostly Sunny | 3 mph ESE | 7% |
Forecast source: National Weather Service (api.weather.gov) for Dumont (42.752, -92.974). Updated through the day.
Growing snapshot for Dumont
Last spring frost
Apr 27
First fall frost
Oct 8
Growing season
165 days
Hardiness zone
5a
More local growing data for Dumont: nearby ZIP 50625 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Allison, Ia (9.5 mi from Dumont). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.