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Knierim, IA Weather & Growing Conditions

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

Overnight
66°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Cloudy. Low around 66, with temperatures rising to around 68 overnight. South wind around 3 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.

7-day forecast for Knierim

WhenTempForecastWindPrecip
Overnight 66°F Chance Showers And Thunderstorms 3 mph S 48%
Saturday 76°F Patchy Fog 7 mph NW 46%
Saturday Night 59°F Slight Chance Rain Showers 9 mph N 19%
Sunday 67°F Chance Drizzle 12 mph NE 36%
Sunday Night 54°F Rain Showers Likely 9 mph ENE 60%
Monday 61°F Rain Showers Likely 9 mph ENE 60%
Monday Night 49°F Chance Rain Showers then Mostly Cloudy 3 to 7 mph ENE 48%
Tuesday 62°F Partly Sunny 5 mph ENE 9%
Tuesday Night 45°F Mostly Clear 3 mph ESE 1%
Wednesday 66°F Sunny 3 mph ESE 1%
Wednesday Night 50°F Partly Cloudy 1 mph SE 10%
Thursday 68°F Slight Chance Rain Showers 3 mph SE 19%
Thursday Night 54°F Mostly Cloudy 1 mph SE 10%
Friday 70°F Partly Sunny 1 to 5 mph SE 10%

Forecast source: National Weather Service (api.weather.gov) for Knierim (42.456, -94.456). Updated through the day.

Growing snapshot for Knierim

Last spring frost
Apr 26
First fall frost
Oct 10
Growing season
167 days
Hardiness zone
5a

More local growing data for Knierim: nearby ZIP 50552 weather · frost dates · planting calendar · Iowa frost dates

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Climate data from the nearest NOAA station, Rockwell City, Ia (9.5 mi from Knierim). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.