In Heritage Lake, July heat, January chill and rainfall all sit near the middle of U.S. towns
Sunny July days climb to about 83°. The year swings widely: the coldest month’s nights and the warmest month’s afternoons are 64° apart. Summers stay cool: July afternoons here are cooler than in 66% of U.S. towns. Plan time outside from April to October, when highs sit at 63–83°.
A year in Heritage Lake at a glance
Each month’s typical high and low, and what it brings.
What stands out about Heritage Lake’s climate
Compared with towns across the U.S., with Heritage Lake’s place in Indiana beside it.
What a year in Heritage Lake feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 169 frost-free days a year
In half of years the last 32° night comes by April 27 and the first by October 15. Frost and day counts come from NOAA’s station at Greencastle 1 W, IN, 11 miles from the town’s center, 120 ft lower.
The 2023 USDA map puts Heritage Lake’s center in zone 6a: the coldest night of a typical winter, averaged over 1991–2020, reaches about −8°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
About 22 inches of snow a winter
Snow, measured at Danville 3 Sw, IN, falls mostly in January. Precipitation (rain plus melted snow) adds up to 44 inches a year; June is the wettest month and February the driest. Rain or snow falls on about 122 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Heritage Lake
89% of the work is heating, so the furnace matters far more than the air conditioner. Months averaging under 55° run from October through April.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Greencastle 1 W, IN.
Living with Heritage Lake’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
169 frost-free days in zone 6a. The last frost comes by Apr 27 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 15.
Months with highs of 62–84° and lows of 40° or more: April, May, June, July, August, September and October.
Parks & trails →Of the yearly building losses FEMA expects in Heritage Lake from natural hazards, river flooding is the largest share (52%); heat waves, cold waves, winter storms and ice storms together are 16%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Heritage Lake and similar climates
TownRatings has no climate map of the towns around Heritage Lake yet.
Climates most like Heritage Lake’s, farther away
TownRatings’ own comparison of NOAA 1991–2020 normals, not a NOAA product: places of 5,000+ at least 150 miles away, one per state, closest on January low, July high, precipitation and snow.
| Town | Jan. low | July high | Precip. | Snow |
|---|---|---|---|---|
| Heritage Lake, IN | 19° | 83° | 44" | 22" |
| Johnstown, OH | 20° | 84° | 42" | 26" |
| Beaver Falls, PA | 20° | 84° | 41" | 20" |
| Westbrook, CT | 22° | 83° | 47" | 25" |
| Washington, NJ | 19° | 84° | 49" | 23" |
Temperatures and precipitation come from NOAA’s 5 km grid; snow and day counts from the stations named on this page.
Warmer than it used to be
The last 30 years in Heritage Lake averaged 0.6° warmer than the 1900s. The biggest change is in December (+2.0°).
A smaller shift than in 96% of U.S. towns.
Change by month
The two periods overlap (1991–2000 is in both), which makes the gap a little smaller than it would be between separate periods.
How Heritage Lake compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Heritage Lake’s place among Indiana’s.
Heritage Lake weather by month
Highs, lows and precipitation from NOAA’s grid at Heritage Lake’s center; snow, wet days and snow on the ground from Danville 3 Sw, IN. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | 30-yr range |
|---|---|---|---|---|---|---|
| January | 35° | 19° | 3.1" | 6.7" | 11 | 19° – 39° |
| February | 39° | 22° | 2.5" | 5.2" | 10 | 18° – 42° |
| March | 50° | 30° | 3.3" | 2.9" | 11 | 34° – 55° |
| April | 63° | 40° | 4.5" | 0.4" | 11 | 45° – 56° |
| May | 73° | 51° | 4.8" | 0.0" | 13 | 56° – 70° |
| June | 81° | 60° | 5.2" | 0.0" | 11 | 66° – 73° |
| July | 83° | 63° | 4.5" | 0.0" | 10 | 67° – 80° |
| August | 83° | 61° | 3.4" | 0.0" | 8 | 67° – 77° |
| September | 77° | 53° | 3.3" | 0.0" | 8 | 60° – 70° |
| October | 65° | 43° | 3.5" | 0.0" | 9 | 50° – 59° |
| November | 51° | 33° | 3.6" | 0.3" | 9 | 34° – 48° |
| December | 39° | 24° | 2.9" | 6.0" | 11 | 18° – 41° |
| Year | 62° | 42° | 44.4" | 21.5" | 122 |
How much a month can swing
A normal is an average. December swings the most: from 1991 to 2020 its average ranged from 18° to 41°. June is the most reliable, staying within 8°.
Where Heritage Lake’s numbers come from
Normals are 30-year averages, not a forecast. How TownRatings reads climate data →
- Temperatures and precipitation: NOAA’s gridded 1991–2020 normals for the 5 km cell at Heritage Lake’s center.
- Snow: Danville 3 Sw, IN.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Greencastle 1 W, IN, 11 miles from the town’s center, 120 ft lower; the nearest station that passes our checks for distance, height and agreement with the grid.
- Growing zone: USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service and PRISM Group, Oregon State University, prism.oregonstate.edu/phzm, accessed 8 Oct 2026.
- Then and now: NOAA’s gridded normals for 1901–2000 at the same cell.
- Storms and extremes: FEMA National Risk Index (expected annual losses to buildings).
Common questions about Heritage Lake’s climate
What is the weather like in Heritage Lake?
A typical July afternoon reaches 83°, a January night drops to 19°, and about 22 inches of snow falls in a normal winter. Colder January nights than 65% of U.S. towns; cooler July afternoons than 66% of U.S. towns.
How cold does it get in Heritage Lake in winter?
January nights average 19°. About 124 nights a year reach 32° or below and 6 reach 0° or below. In the coldest January of the last 30 years the month averaged 19°.
How much snow does Heritage Lake get?
About 22 inches in a normal winter at Danville 3 Sw, IN, most of it in January.
How hot does it get in Heritage Lake?
July, with a typical high of 83° and a low of 63°. About 15 days a year reach 90° (Greencastle 1 W, IN).
When is the first and last frost in Heritage Lake?
In half of years the last spring frost (32°) comes by April 27 and the first fall frost by October 15, about 169 frost-free days, at Greencastle 1 W, IN.
What growing zone is Heritage Lake in?
Zone 6a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −8°.
What is the best time of year to visit Heritage Lake?
By one simple rule (highs of 62–84° and lows of 40° or more), April, May, June, July, August, September and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Heritage Lake getting warmer?
Yes: 1991–2020 averaged 0.6° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 96% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Heritage Lake.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.