Hartwick, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Hartwick, a city in Poweshiek County, Iowa.
Overnight
47°F
Slight Chance Rain Showers
A slight chance of rain showers after 5am. Cloudy. Low around 47, with temperatures rising to around 49 overnight. Southwest wind around 13 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
7-day forecast for Hartwick
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 47°F | Slight Chance Rain Showers | 13 mph SW | 18% |
| Wednesday | 52°F | Slight Chance Rain Showers | 15 mph WSW | 21% |
| Wednesday Night | 43°F | Cloudy | 13 mph W | 11% |
| Thursday | 54°F | Chance Rain Showers | 12 mph WNW | 39% |
| Thursday Night | 37°F | Mostly Cloudy | 9 mph N | 10% |
| Friday | 49°F | Mostly Sunny | 5 to 8 mph N | 1% |
| Friday Night | 28°F | Partly Cloudy | 3 mph N | 0% |
| Saturday | 52°F | Mostly Sunny | 3 mph WNW | 0% |
| Saturday Night | 33°F | Mostly Clear | 3 mph W | 1% |
| Sunday | 58°F | Sunny | 6 mph W | 2% |
| Sunday Night | 34°F | Clear | 3 mph SW | 0% |
| Monday | 63°F | Sunny | 3 to 8 mph SW | 0% |
| Monday Night | 39°F | Mostly Clear | 5 mph W | 0% |
| Tuesday | 63°F | Sunny | 3 mph NW | 0% |
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 Nov 4, 2026.