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Bonaparte, IA Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Bonaparte, a city in Van Buren County, Iowa.

Tonight
66°F
Chance Showers And Thunderstorms
A slight chance of rain showers before 7pm, then a chance of showers and thunderstorms between 7pm and 1am, then showers and thunderstorms likely. Mostly cloudy. Low around 66, with temperatures rising to around 68 overnight. North wind around 0 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

7-day forecast for Bonaparte

WhenTempForecastWindPrecip
Tonight 66°F Chance Showers And Thunderstorms 0 mph 63%
Sunday 72°F Showers And Thunderstorms Likely then Chance Showers And Thunderstorms 0 to 10 mph N 63%
Sunday Night 59°F Chance Showers And Thunderstorms 5 to 10 mph NE 65%
Monday 63°F Showers And Thunderstorms 5 to 10 mph NE 77%
Monday Night 54°F Rain Showers Likely 5 mph NE 71%
Tuesday 62°F Chance Rain Showers 5 to 10 mph NE 34%
Tuesday Night 49°F Partly Cloudy 0 to 5 mph NE 3%
Wednesday 64°F Mostly Sunny 5 mph NE 1%
Wednesday Night 52°F Partly Cloudy 0 to 5 mph NE 0%
Thursday 68°F Partly Sunny 0 mph 4%
Thursday Night 57°F Slight Chance Rain Showers 0 mph 18%
Friday 72°F Slight Chance Rain Showers 0 to 5 mph NE 18%
Friday Night 58°F Partly Cloudy 0 mph 8%
Saturday 73°F Mostly Sunny 0 to 5 mph E 9%

Forecast source: National Weather Service (api.weather.gov) for Bonaparte (40.701, -91.801). Updated through the day.

Growing snapshot for Bonaparte

Last spring frost
Apr 26
First fall frost
Oct 13
Growing season
169 days
Hardiness zone
6a

More local growing data for Bonaparte: nearby ZIP 52620 weather · frost dates · planting calendar · Iowa frost dates

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Climate data from the nearest NOAA station, Keosauqua, Ia (9.3 mi from Bonaparte). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.