Harman US

Benton, IA Weather & Growing Conditions

This Afternoon
84°F
Mostly Sunny
Mostly sunny. High near 84, with temperatures falling to around 82 in the afternoon. West southwest wind 7 to 10 mph, with gusts as high as 20 mph. New rainfall amounts less than a tenth of an inch possible.

7-day forecast

WhenTempForecastWindPrecip
This Afternoon 84°F Mostly Sunny 7 to 10 mph WSW 14%
Tonight 63°F Chance Showers And Thunderstorms then Showers And Thunderstorms Likely 3 to 7 mph N 67%
Sunday 68°F Chance Showers And Thunderstorms 7 to 12 mph NNE 44%
Sunday Night 58°F Showers And Thunderstorms Likely 8 to 12 mph NE 64%
Monday 61°F Rain Showers Likely 12 mph NE 64%
Monday Night 52°F Chance Rain Showers then Mostly Cloudy 6 to 10 mph NE 44%
Tuesday 59°F Partly Sunny 9 mph NE 7%
Tuesday Night 46°F Partly Cloudy 2 to 7 mph ENE 4%
Wednesday 63°F Mostly Sunny 5 mph ENE 2%
Wednesday Night 51°F Partly Cloudy 3 mph E 7%
Thursday 66°F Slight Chance Rain Showers 5 mph ESE 23%
Thursday Night 56°F Mostly Cloudy then Slight Chance Rain Showers 3 mph ESE 22%
Friday 67°F Slight Chance Rain Showers 6 mph ESE 22%
Friday Night 57°F Mostly Cloudy 5 mph ESE 13%

Forecast source: National Weather Service (api.weather.gov). Updated through the day.

Growing snapshot for Benton, IA

Last spring frost
Apr 25
First fall frost
Oct 12
Growing season
169 days
Hardiness zone
5b

Explore more for Benton, IA: full frost dates · planting calendar · Iowa frost dates

Climate data from the nearest NOAA station, Mt Ayr, Ia (7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.