Hartz Lake, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Hartz Lake, a community in Pulaski County, Indiana.
This Afternoon
75°F
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms. Mostly cloudy, with a high near 75. Southwest wind around 5 mph. Chance of precipitation is 20%.
7-day forecast for Hartz Lake
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 75°F | Slight Chance Showers And Thunderstorms | 5 mph SW | 20% |
| Tonight | 66°F | Showers And Thunderstorms Likely | 0 to 5 mph SE | 74% |
| Sunday | 75°F | Showers And Thunderstorms Likely | 0 to 10 mph N | 65% |
| Sunday Night | 54°F | Showers And Thunderstorms Likely | 10 mph NE | 58% |
| Monday | 66°F | Chance Rain Showers | 10 to 15 mph NE | 37% |
| Monday Night | 50°F | Chance Rain Showers | 10 mph NE | 37% |
| Tuesday | 65°F | Slight Chance Rain Showers | 10 mph NE | 22% |
| Tuesday Night | 51°F | Slight Chance Rain Showers | 10 mph NE | 22% |
| Wednesday | 66°F | Slight Chance Rain Showers | 10 mph NE | 19% |
| Wednesday Night | 51°F | Slight Chance Rain Showers then Mostly Cloudy | 5 to 10 mph NE | 19% |
| Thursday | 69°F | Partly Sunny | 5 mph NE | 5% |
| Thursday Night | 52°F | Mostly Cloudy | 5 mph NE | 8% |
| Friday | 72°F | Partly Sunny | 5 mph NE | 8% |
| Friday Night | 51°F | Partly Cloudy | 0 to 5 mph NE | 2% |
Forecast source: National Weather Service (api.weather.gov) for Hartz Lake (41.178, -86.498). Updated through the day.
Growing snapshot for Hartz Lake
Last spring frost
Apr 25
First fall frost
Oct 18
Growing season
173 days
Hardiness zone
6a
More local growing data for Hartz Lake: nearby ZIP 46960 weather · frost dates · planting calendar · Indiana frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Winamac 2Sse, In (10 mi from Hartz Lake). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.