Photo: Ian Poellet · CC BY-SA 3.0Mosier’s winters are milder and less snowy than most of the U.S.
A typical July afternoon reaches 85°, a January night drops to 31°, and about 17 inches of snow falls in a normal winter.
A year in Mosier at a glance
Each month’s typical high and low, and what it brings.
What stands out about Mosier’s climate
Compared with towns across the U.S., with Mosier’s place in Oregon beside it.
What a year in Mosier feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 177 frost-free days a year
In half of years the last 32° night comes by April 20 and the first by October 13. Frost and day counts come from NOAA’s station at Hood Rvr Exp Stn, OR, 6 miles from the town’s center, 360 ft higher.
The 2023 USDA map puts Mosier’s center in zone 8a: the coldest night of a typical winter, averaged over 1991–2020, reaches about 14°. 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 17 inches of snow a winter
Snow, measured at Hood Rvr Exp Stn, OR, falls mostly in January. Precipitation (rain plus melted snow) adds up to 22 inches a year; December is the wettest month and July the driest. Rain or snow falls on about 132 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Mosier
93% 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 Hood Rvr Exp Stn, OR.
Living with Mosier’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
177 frost-free days in zone 8a. The last frost comes by Apr 20 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 13.
Months with highs of 62–84° and lows of 40° or more: May, June, September and October. 1.2 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Mosier from natural hazards, wildfire is the largest share (61%); heat waves, cold waves, winter storms and ice storms together are 6%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Mosier and similar climates
TownRatings has no climate map of the towns around Mosier yet.
Climates most like Mosier’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 |
|---|---|---|---|---|
| Mosier, OR | 31° | 85° | 22" | 17" |
| Pullman, WA | 27° | 84° | 20" | 33" |
| Coeur d'Alene, ID | 26° | 83° | 26" | 27" |
| Silver City, NM | 26° | 87° | 16" | 13" |
| Indian Hills, NV | 25° | 86° | 14" | 14" |
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 Mosier averaged 1.3° warmer than the 1900s. The biggest change is in January (+3.5°).
A smaller shift than in 51% 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 Mosier compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Mosier’s place among Oregon’s.
Mosier weather by month
Highs, lows and precipitation from NOAA’s grid at Mosier’s center; snow, wet days and snow on the ground from Hood Rvr Exp Stn, OR. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 42° | 31° | 3.6" | 6.9" | 19 | 6 | 27° – 41° |
| February | 48° | 32° | 2.5" | 2.5" | 15 | 2 | 31° – 46° |
| March | 55° | 35° | 2.1" | 0.7" | 15 | 1 | 40° – 51° |
| April | 63° | 40° | 1.5" | 0.0" | 13 | 0 | 46° – 57° |
| May | 71° | 46° | 1.1" | 0.0" | 9 | 0 | 54° – 64° |
| June | 77° | 52° | 0.7" | 0.0" | 6 | 0 | 60° – 73° |
| July | 85° | 56° | 0.2" | 0.0" | 2 | 0 | 63° – 75° |
| August | 86° | 56° | 0.3" | 0.0" | 2 | 0 | 66° – 76° |
| September | 78° | 49° | 0.6" | 0.0" | 4 | 0 | 60° – 67° |
| October | 65° | 41° | 1.9" | 0.1" | 11 | 0 | 48° – 58° |
| November | 50° | 35° | 3.3" | 1.5" | 18 | 1 | 36° – 47° |
| December | 41° | 31° | 4.1" | 5.5" | 19 | 3 | 31° – 39° |
| Year | 63° | 42° | 21.9" | 17.2" | 132 | 12 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 31° to 46°. September is the most reliable, staying within 7°.
Where Mosier’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 Mosier’s center.
- Snow: Hood Rvr Exp Stn, OR.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Hood Rvr Exp Stn, OR, 6 miles from the town’s center, 360 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 Mosier’s climate
What is the weather like in Mosier?
A typical July afternoon reaches 85°, a January night drops to 31°, and about 17 inches of snow falls in a normal winter. Milder January nights than 74% of U.S. towns; hotter July afternoons than 51% of U.S. towns.
How cold does it get in Mosier in winter?
December nights average 31°. About 92 nights a year reach 32° or below. In the coldest December of the last 30 years the month averaged 31°.
How much snow does Mosier get?
About 17 inches in a normal winter at Hood Rvr Exp Stn, OR, most of it in January, with snow on the ground about 12 days a year.
How hot does it get in Mosier?
July, with a typical high of 85° and a low of 56°. About 21 days a year reach 90° and 2 reach 100° (Hood Rvr Exp Stn, OR).
When is the first and last frost in Mosier?
In half of years the last spring frost (32°) comes by April 20 and the first fall frost by October 13, about 177 frost-free days, at Hood Rvr Exp Stn, OR.
What growing zone is Mosier in?
Zone 8a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 14°.
What is the best time of year to visit Mosier?
By one simple rule (highs of 62–84° and lows of 40° or more), May, June, September and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Mosier getting warmer?
Yes: 1991–2020 averaged 1.3° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 51% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Mosier.
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.