Hartz Lake, IN Weather & Growing Conditions
Today
77°F
Chance Showers And Thunderstorms then Showers And Thunderstorms
A chance of showers and thunderstorms before 10am, then showers and thunderstorms between 10am and 2pm, then a chance of showers and thunderstorms. Cloudy, with a high near 77. Southeast wind 5 to 10 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 77°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 5 to 10 mph SE | 89% |
| Tonight | 65°F | Showers And Thunderstorms Likely | 5 mph S | 78% |
| Sunday | 73°F | Showers And Thunderstorms Likely | 5 to 10 mph N | 67% |
| Sunday Night | 54°F | Chance Showers And Thunderstorms | 10 to 15 mph NE | 48% |
| Monday | 66°F | Chance Rain Showers | 10 to 15 mph NE | 48% |
| Monday Night | 49°F | Slight Chance Rain Showers then Mostly Cloudy | 10 to 15 mph NE | 20% |
| Tuesday | 65°F | Mostly Cloudy then Slight Chance Rain Showers | 10 to 15 mph NE | 20% |
| Tuesday Night | 50°F | Slight Chance Rain Showers | 10 to 15 mph NE | 20% |
| Wednesday | 66°F | Slight Chance Rain Showers then Mostly Cloudy | 10 mph NE | 19% |
| Wednesday Night | 51°F | Mostly Cloudy | 5 to 10 mph NE | 11% |
| Thursday | 68°F | Partly Sunny | 5 to 10 mph NE | 3% |
| Thursday Night | 51°F | Mostly Cloudy | 5 to 10 mph NE | 3% |
| Friday | 71°F | Mostly Sunny | 5 to 10 mph NE | 1% |
| Friday Night | 50°F | Partly Cloudy | 5 to 10 mph NE | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Hartz Lake, IN
Last spring frost
Apr 25
First fall frost
Oct 18
Growing season
173 days
Hardiness zone
6a
Explore more for Hartz Lake, IN: full frost dates · planting calendar · Indiana frost dates
Climate data from the nearest NOAA station, Winamac 2Sse, In (10 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.