Hartwick, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Hartwick, a city in Poweshiek County, Iowa.
Today
81°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely before 8am, then patchy fog and showers and thunderstorms likely between 8am and 1pm, then a chance of showers and thunderstorms. Partly sunny. High near 81, with temperatures falling to around 79 in the afternoon. South southwest wind around 8 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Hartwick
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 81°F | Showers And Thunderstorms Likely | 8 mph SSW | 61% |
| Tonight | 61°F | Chance Showers And Thunderstorms | 6 to 9 mph NNW | 51% |
| Sunday | 66°F | Chance Rain Showers | 12 mph NE | 51% |
| Sunday Night | 55°F | Chance Rain Showers | 13 mph NE | 50% |
| Monday | 62°F | Chance Rain Showers | 13 mph NE | 50% |
| Monday Night | 50°F | Chance Rain Showers | 8 to 12 mph NE | 47% |
| Tuesday | 60°F | Chance Rain Showers then Partly Sunny | 9 mph NE | 29% |
| Tuesday Night | 45°F | Mostly Clear | 3 to 7 mph NE | 4% |
| Wednesday | 64°F | Sunny | 5 mph NE | 0% |
| Wednesday Night | 49°F | Partly Cloudy | 3 mph ENE | 2% |
| Thursday | 66°F | Partly Sunny | 3 mph E | 8% |
| Thursday Night | 53°F | Partly Cloudy | 2 mph E | 6% |
| Friday | 68°F | Partly Sunny | 5 mph E | 6% |
| Friday Night | 53°F | Partly Cloudy | 3 mph E | 8% |
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 19, 2026.