Hartz Lake, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Hartz Lake, a community in Pulaski County, Indiana.
Today
82°F
Sunny
Sunny, with a high near 82. South wind 0 to 5 mph.
7-day forecast for Hartz Lake
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 82°F | Sunny | 0 to 5 mph S | 0% |
| Tonight | 60°F | Mostly Clear | 0 to 5 mph S | 0% |
| Wednesday | 83°F | Mostly Sunny | 0 to 5 mph SW | 13% |
| Wednesday Night | 65°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 70% |
| Thursday | 80°F | Showers And Thunderstorms Likely | 0 to 5 mph SW | 74% |
| Thursday Night | 63°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 0 to 5 mph S | 62% |
| Friday | 82°F | Partly Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph SW | 24% |
| Friday Night | 63°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph S | 24% |
| Saturday | 83°F | Mostly Sunny | 0 to 5 mph S | 12% |
| Saturday Night | 67°F | Partly Cloudy | 5 mph SW | 14% |
| Sunday | 85°F | Mostly Sunny | 5 to 10 mph SW | 14% |
| Sunday Night | 69°F | Chance Showers And Thunderstorms | 5 to 10 mph SW | 34% |
| Monday | 85°F | Chance Rain Showers then Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 34% |
| Monday Night | 68°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 to 10 mph SW | 43% |
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 Aug 4, 2026.