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Hartwick, IA Weather & Growing Conditions

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

This Afternoon
80°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Partly sunny. High near 80, with temperatures falling to around 76 in the afternoon. East southeast wind around 5 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.

7-day forecast for Hartwick

WhenTempForecastWindPrecip
This Afternoon 80°F Chance Showers And Thunderstorms 5 mph ESE 50%
Tonight 61°F Chance Showers And Thunderstorms then Showers And Thunderstorms Likely 3 to 8 mph NNE 63%
Sunday 65°F Chance Rain Showers 9 to 13 mph NNE 50%
Sunday Night 55°F Chance Drizzle then Chance Rain Showers 12 mph ENE 48%
Monday 60°F Rain Showers 12 mph NE 76%
Monday Night 50°F Rain Showers 10 mph NE 76%
Tuesday 59°F Slight Chance Rain Showers 8 mph NE 24%
Tuesday Night 46°F Partly Cloudy 3 to 7 mph NE 7%
Wednesday 63°F Mostly Sunny 6 mph NE 1%
Wednesday Night 50°F Partly Cloudy 3 mph ENE 2%
Thursday 65°F Slight Chance Rain Showers 3 mph ESE 16%
Thursday Night 54°F Slight Chance Rain Showers 2 mph E 22%
Friday 68°F Slight Chance Rain Showers then Mostly Cloudy 3 mph E 19%
Friday Night 55°F Mostly Cloudy 2 mph E 10%

Forecast source: National Weather Service (api.weather.gov) for Hartwick (41.786, -92.345). Updated through the day.

Growing snapshot for Hartwick

Last spring frost
Apr 28
First fall frost
Oct 10
Growing season
165 days
Hardiness zone
5a

More local growing data for Hartwick: nearby ZIP 52232 weather · frost dates · planting calendar · Iowa frost dates

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Climate data from the nearest NOAA station, Belle Plaine, Ia (6.4 mi from Hartwick). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.