Hartz Lake has chilly winters and pleasant summers
A typical July afternoon reaches 84°, a January night drops to 17°, and about 27 inches of snow falls in a normal winter.
A year in Hartz Lake at a glance
Each month’s typical high and low, and what it brings.
What stands out about Hartz Lake’s climate
Read from where Hartz Lake sits among Indiana’s towns. The page puts what stands out first.
About 173 frost-free days a year
In half of years the last 32° night comes by April 25 and the first by October 18.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
Warmer than it used to be
The last 30 years in Hartz Lake averaged 1.4° warmer than the 1900s. The biggest change is in December (+2.7°).
A bigger shift than in 62% of U.S. towns.
Change by month
What a year in Hartz Lake feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
27 inches of snow, 41 of rain and melt
June is the wettest month and February the driest. Rain or snow falls on about 125 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Living with Hartz Lake’s climate
What the numbers mean for a garden, a driveway, a furnace and a free afternoon.
173 frost-free days. The last frost comes by Apr 25 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Oct 18.
About 27" a winter over 10 days with an inch or more, most in January. Snow covers the ground about 41 days a year.
Months averaging under 55° run from October through April. Heating is 88% of the year’s heating-and-cooling load.
About 14 days a year reach 90°, and July afternoons average 84°.
The nicest months are May, June, July, August, September and October.
Parks & trails →Normals are averages. Ice storms, nor’easters, floods and heat waves are on the natural hazards page.
Natural hazards →How Hartz Lake compares
Against every U.S. town on TownTapestry, each counted once, with its place in Indiana.
Hartz Lake weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 32° | 17° | 2.6" | 9.5" | 11 | 16 | 14° – 37° |
| February | 36° | 20° | 2.2" | 6.5" | 9 | 12 | 16° – 38° |
| March | 48° | 28° | 2.6" | 3.5" | 10 | 4 | 28° – 54° |
| April | 61° | 37° | 3.8" | 0.4" | 11 | 0 | 42° – 55° |
| May | 72° | 49° | 4.4" | 0 | 13 | 0 | 54° – 67° |
| June | 81° | 59° | 4.6" | 0 | 12 | 0 | 65° – 73° |
| July | 84° | 62° | 4.2" | 0 | 10 | 0 | 68° – 79° |
| August | 82° | 60° | 4.2" | 0 | 9 | 0 | 66° – 77° |
| September | 76° | 52° | 3.4" | 0 | 9 | 0 | 59° – 69° |
| October | 64° | 42° | 3.4" | 0 | 11 | 0 | 49° – 59° |
| November | 49° | 31° | 2.9" | 1.0" | 10 | 1 | 32° – 47° |
| December | 37° | 23° | 2.5" | 5.6" | 11 | 8 | 15° – 40° |
| Year | 60° | 40° | 40.9" | 26.5" | 125 | 41 |
Heating and cooling a home in Hartz Lake
88% of the work is heating, so the furnace matters far more than the air conditioner.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. Source: NOAA station normals.
How much a month can swing
A normal is an average. March swings the most: from 1991 to 2020 its average ranged from 28° to 54°. June is the most reliable, staying within 9°.
Common questions about Hartz Lake’s climate
What is the coldest month in Hartz Lake?
January, with a typical high of 32° and a low of 17°.
What is the hottest month in Hartz Lake?
July, with a typical high of 84° and a low of 62°. About 14 days a year reach 90°.
How much snow does Hartz Lake get?
About 27 inches in a normal winter, most of it in January.
When is the first frost in Hartz Lake?
In half of years the first 32° night comes by October 18, and the last spring frost by April 25.
What is the rainiest month in Hartz Lake?
June, with 4.6 inches of rain and melted snow. The year totals 41 inches.
Neighbors talk weather
Gardens, snow, and the best days of the year in Hartz Lake.
Your answer becomes a post in Town Square.
Temperatures and rainfall come from NOAA’s gridded climate normals for Hartz Lake itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Winamac 2sse, IN (11 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000. Today’s forecast: National Weather Service.