Photo: Touch em all 4 · CC BY-SA 3.0Jasper gets more rain and snow than 81% of U.S. towns: 49 inches of precipitation a year
January nights here settle around 23°. In July, afternoons here are warmer than in 63% of U.S. towns. Decade by decade the climate has edged up, 0.8° above 1901–2000. Central heating does most of its work from November to March, in months below 50° on average.
A year in Jasper at a glance
Each month’s typical high and low, and what it brings.
What stands out about Jasper’s climate
Compared with towns across the U.S., with Jasper’s place in Indiana beside it.
What a year in Jasper feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 172 frost-free days a year
In half of years the last 32° night comes by April 25 and the first by October 15. Frost and day counts come from NOAA’s station at Dubois S In Forage Fm, IN, 14 miles from the town’s center, 190 ft higher.
The 2023 USDA map puts Jasper’s center in zone 6b: the coldest night of a typical winter, averaged over 1991–2020, reaches about −2°. 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 14 inches of snow a winter
Snow, measured at Shoals 8 S, IN, is heaviest from January through February, about 5 inches a month. Precipitation (rain plus melted snow) adds up to 49 inches a year; May is the wettest month and February the driest. Rain or snow falls on about 117 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Jasper
84% of the work is heating. Months averaging under 55° run from November through March.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Dubois S In Forage Fm, IN.
Living with Jasper’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
172 frost-free days in zone 6b. 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 15.
Months with highs of 62–84° and lows of 40° or more: April, May, September and October. 3.9 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Jasper from natural hazards, river flooding is the largest share (51%); heat waves, cold waves, winter storms and ice storms together are 7%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Jasper and its neighbors
Every town next door is within a degree of Jasper in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Jasper’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 |
|---|---|---|---|---|
| Jasper, IN | 23° | 87° | 49" | 14" |
| Collegeville, PA | 23° | 88° | 47" | 13" |
| Hockessin, DE | 24° | 86° | 48" | 12" |
| Bel Air North, MD | 24° | 87° | 47" | 18" |
| Mount Sterling, KY | 24° | 87° | 50" | 8.8" |
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value. Snow and frost-free days come from the nearest weather station, so neighbors often share them.
Warmer than it used to be
The last 30 years in Jasper averaged 0.8° warmer than the 1900s. The biggest change is in February (+2.1°).
A smaller shift than in 88% 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 Jasper compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Jasper’s place among Indiana’s.
Jasper weather by month
Highs, lows and precipitation from NOAA’s grid at Jasper’s center; snow, wet days and snow on the ground from Shoals 8 S, IN. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 41° | 23° | 3.5" | 4.5" | 11 | 7 | 25° – 42° |
| February | 45° | 26° | 3.1" | 4.7" | 9 | 5 | 24° – 45° |
| March | 56° | 34° | 4.5" | 1.8" | 11 | 1 | 37° – 58° |
| April | 67° | 43° | 5.2" | 0.0" | 12 | 0 | 49° – 60° |
| May | 76° | 53° | 5.7" | 0.0" | 13 | 0 | 59° – 72° |
| June | 84° | 62° | 4.8" | 0.0" | 10 | 0 | 68° – 77° |
| July | 87° | 65° | 4.3" | 0.0" | 9 | 0 | 71° – 83° |
| August | 86° | 63° | 3.1" | 0.0" | 7 | 0 | 70° – 80° |
| September | 81° | 55° | 3.6" | 0.0" | 7 | 0 | 64° – 74° |
| October | 69° | 44° | 3.4" | 0.1" | 8 | 0 | 53° – 63° |
| November | 56° | 34° | 4.1" | 0.2" | 9 | 0 | 38° – 51° |
| December | 45° | 27° | 3.8" | 2.3" | 11 | 4 | 23° – 46° |
| Year | 66° | 44° | 49.1" | 13.6" | 117 | 17 |
How much a month can swing
A normal is an average. December swings the most: from 1991 to 2020 its average ranged from 23° to 46°. June is the most reliable, staying within 9°.
Where Jasper’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 Jasper’s center.
- Snow: Shoals 8 S, IN.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Dubois S In Forage Fm, IN, 14 miles from the town’s center, 190 ft higher; 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 Jasper’s climate
What is the weather like in Jasper?
A typical July afternoon reaches 87°, a January night drops to 23°, and about 14 inches of snow falls in a normal winter. Milder January nights than 55% of U.S. towns; hotter July afternoons than 63% of U.S. towns.
How cold does it get in Jasper in winter?
January nights average 23°. About 112 nights a year reach 32° or below and 3 reach 0° or below. In the coldest January of the last 30 years the month averaged 25°.
How much snow does Jasper get?
About 14 inches in a normal winter at Shoals 8 S, IN, heaviest from January through February, about 5 inches a month, with snow on the ground about 17 days a year.
How hot does it get in Jasper?
July, with a typical high of 87° and a low of 65°. About 31 days a year reach 90° (Dubois S In Forage Fm, IN).
When is the first and last frost in Jasper?
In half of years the last spring frost (32°) comes by April 25 and the first fall frost by October 15, about 172 frost-free days, at Dubois S In Forage Fm, IN.
What growing zone is Jasper in?
Zone 6b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −2°.
What is the best time of year to visit Jasper?
By one simple rule (highs of 62–84° and lows of 40° or more), April, May, September and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Jasper getting warmer?
Yes: 1991–2020 averaged 0.8° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 88% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Jasper.
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.