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Monroe, IA Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Monroe, a city in Jasper County, Iowa.

This Afternoon
83°F
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms. Partly sunny. High near 83, with temperatures falling to around 80 in the afternoon. West wind around 7 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.

7-day forecast for Monroe

WhenTempForecastWindPrecip
This Afternoon 83°F Slight Chance Showers And Thunderstorms 7 mph W 22%
Tonight 63°F Chance Showers And Thunderstorms then Showers And Thunderstorms Likely 8 mph N 74%
Sunday 66°F Chance Rain Showers then Chance Drizzle 9 to 13 mph NNE 44%
Sunday Night 58°F Rain Showers Likely 13 mph ENE 56%
Monday 60°F Rain Showers 13 mph NE 83%
Monday Night 53°F Rain Showers Likely 12 mph NE 74%
Tuesday 60°F Slight Chance Rain Showers 9 mph NE 17%
Tuesday Night 49°F Partly Cloudy 5 to 8 mph NE 4%
Wednesday 64°F Mostly Sunny 6 mph ENE 1%
Wednesday Night 53°F Partly Cloudy 3 mph E 3%
Thursday 67°F Slight Chance Rain Showers 5 mph ESE 18%
Thursday Night 58°F Slight Chance Rain Showers 3 mph ESE 22%
Friday 69°F Slight Chance Rain Showers 2 to 6 mph E 22%
Friday Night 59°F Mostly Cloudy 3 mph E 7%

Forecast source: National Weather Service (api.weather.gov) for Monroe (41.519, -93.104). Updated through the day.

Growing snapshot for Monroe

Last spring frost
Apr 21
First fall frost
Oct 15
Growing season
174 days
Hardiness zone
5b

More local growing data for Monroe: nearby ZIP 50170 weather · frost dates · planting calendar · Iowa frost dates

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Climate data from the nearest NOAA station, Des Moines 17 E, Ia (8.9 mi from Monroe). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.