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
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| 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
Nearby towns & communities
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.