Photo: Visitor7 · CC BY-SA 3.0Nights stay kind in Jasper each January, milder than in 83% of U.S. towns
Midsummer highs settle at about 83°. Winter and summer sit 48° apart. Its July afternoons stay fresher than in 74% of U.S. towns. Long walks are most pleasant from May to October, when afternoons reach 65–83°.
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 Oregon 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 263 frost-free days a year
In half of years the last 32° night comes by March 7 and the first by November 27. Frost and day counts come from NOAA’s station at Lookout Pt Dam, OR, 9 miles from the town’s center, 160 ft higher.
The 2023 USDA map puts Jasper’s center in zone 8b: the coldest night of a typical winter, averaged over 1991–2020, reaches about 19°. 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 3 inches of snow a winter
Snow, measured at Leaburg 1 Sw, OR, falls mostly in February and December. Precipitation (rain plus melted snow) adds up to 47 inches a year; December is the wettest month and July the driest. Rain or snow falls on about 166 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Jasper
94% 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 Lookout Pt Dam, OR.
Living with Jasper’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
263 frost-free days in zone 8b. The last frost comes by Mar 7 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Nov 27.
Months with highs of 62–84° and lows of 40° or more: May, June, July, August, September and October.
Parks & trails →Of the yearly building losses FEMA expects in Jasper from natural hazards, river flooding is the largest share (59%); heat waves, cold waves, winter storms and ice storms together are 2%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Jasper and similar climates
TownRatings has no climate map of the towns around Jasper yet.
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, OR | 36° | 83° | 47" | 3.4" |
| Kill Devil Hills, NC | 35° | 86° | 50" | 1.1" |
| Brigantine, NJ | 28° | 83° | 45" | 10" |
| Centralia, WA | 34° | 78° | 49" | 3.9" |
| Ocean City, MD | 30° | 86° | 46" | 10" |
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 Jasper averaged 1.2° warmer than the 1900s. The biggest change is in January (+2.5°).
A smaller shift than in 66% 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 Oregon’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 Leaburg 1 Sw, OR. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 48° | 36° | 6.4" | 0.5" | 20 | 1 | 37° – 47° |
| February | 52° | 36° | 4.9" | 1.2" | 18 | 1 | 38° – 49° |
| March | 57° | 38° | 5.3" | 0.2" | 20 | 0 | 44° – 52° |
| April | 61° | 40° | 4.5" | 0.0" | 19 | 0 | 47° – 56° |
| May | 68° | 45° | 3.1" | 0.0" | 14 | 0 | 52° – 61° |
| June | 74° | 49° | 1.8" | 0.0" | 9 | 0 | 58° – 67° |
| July | 83° | 53° | 0.4" | 0.0" | 3 | 0 | 62° – 71° |
| August | 83° | 52° | 0.5" | 0.0" | 3 | 0 | 65° – 71° |
| September | 77° | 49° | 1.5" | 0.0" | 7 | 0 | 60° – 66° |
| October | 65° | 44° | 3.8" | 0.0" | 14 | 0 | 50° – 59° |
| November | 53° | 39° | 6.7" | 0.2" | 20 | 0 | 41° – 51° |
| December | 47° | 35° | 7.6" | 1.3" | 21 | 1 | 36° – 45° |
| Year | 64° | 43° | 46.7" | 3.4" | 166 | 3 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 38° to 49°. September is the most reliable, staying within 6°.
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: Leaburg 1 Sw, OR.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Lookout Pt Dam, OR, 9 miles from the town’s center, 160 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 83°, a January night drops to 36°, and about 3 inches of snow falls in a normal winter. Milder January nights than 83% of U.S. towns; cooler July afternoons than 74% of U.S. towns.
How cold does it get in Jasper in winter?
December nights average 35°. About 27 nights a year reach 32° or below. In the coldest December of the last 30 years the month averaged 36°.
How much snow does Jasper get?
About 3.4 inches in a normal winter at Leaburg 1 Sw, OR, most of it in February and December, with snow on the ground about 3 days a year.
How hot does it get in Jasper?
July, with a typical high of 83° and a low of 53°. About 9 days a year reach 90° (Lookout Pt Dam, OR).
When is the first and last frost in Jasper?
In half of years the last spring frost (32°) comes by March 7 and the first fall frost by November 27, about 263 frost-free days, at Lookout Pt Dam, OR.
What growing zone is Jasper in?
Zone 8b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 19°.
What is the best time of year to visit Jasper?
By one simple rule (highs of 62–84° and lows of 40° or more), May, June, July, August, 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 1.2° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 66% 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.