Hartwick, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Hartwick, a city in Poweshiek County, Iowa.
Today
84°F
Partly Sunny then Showers And Thunderstorms
Showers and thunderstorms after noon. Partly sunny. High near 84, with temperatures falling to around 81 in the afternoon. West wind around 7 mph. Chance of precipitation is 80%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Hartwick
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Partly Sunny then Showers And Thunderstorms | 7 mph W | 77% |
| Tonight | 62°F | Showers And Thunderstorms | 9 mph N | 87% |
| Wednesday | 74°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 3 to 7 mph NNE | 74% |
| Wednesday Night | 55°F | Chance Showers And Thunderstorms | 5 mph NNE | 42% |
| Thursday | 80°F | Sunny | 2 mph NE | 6% |
| Thursday Night | 58°F | Mostly Clear | 1 mph ESE | 0% |
| Friday | 83°F | Sunny | 1 to 5 mph SSE | 4% |
| Friday Night | 64°F | Mostly Clear | 5 mph SSE | 13% |
| Saturday | 87°F | Sunny | 6 mph S | 10% |
| Saturday Night | 70°F | Mostly Clear then Slight Chance Showers And Thunderstorms | 9 mph S | 15% |
| Sunday | 88°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 9 mph S | 15% |
| Sunday Night | 69°F | Chance Showers And Thunderstorms | 8 mph S | 35% |
| Monday | 87°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 10 mph SSW | 35% |
| Monday Night | 69°F | Slight Chance Showers And Thunderstorms | 10 mph E | 30% |
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 Aug 4, 2026.