Hartz Lake, IN Weather & Growing Conditions
This Afternoon
67°F
Mostly Cloudy
Mostly cloudy. High near 67, with temperatures falling to around 60 in the afternoon. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 67°F | Mostly Cloudy | 10 to 15 mph SW | 11% |
| Tonight | 47°F | Mostly Cloudy | 10 mph SW | 14% |
| Thursday | 57°F | Mostly Cloudy then Slight Chance Rain Showers | 10 to 15 mph SW | 20% |
| Thursday Night | 41°F | Rain Showers Likely | 5 to 10 mph W | 65% |
| Friday | 51°F | Chance Rain Showers | 5 to 15 mph NW | 45% |
| Friday Night | 34°F | Chance Rain Showers then Mostly Cloudy | 5 to 10 mph NW | 27% |
| Saturday | 52°F | Mostly Sunny | 5 to 10 mph NW | 3% |
| Saturday Night | 30°F | Mostly Clear | 0 to 5 mph W | 0% |
| Sunday | 56°F | Sunny | 5 to 10 mph W | 1% |
| Sunday Night | 32°F | Mostly Clear | 0 to 5 mph W | 1% |
| Monday | 60°F | Sunny | 0 to 10 mph SW | 0% |
| Monday Night | 37°F | Clear | 5 mph SW | 0% |
| Tuesday | 61°F | Sunny | 5 mph W | 0% |
| Tuesday Night | 35°F | Mostly Clear | 0 to 5 mph NW | 2% |
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 Nov 4, 2026.