Photo: Richard Bauer · CC BY 2.0Mossyrock sits near the bottom of U.S. towns for July heat
In January the night’s low is typically 34°. By precipitation alone, it ranks wetter than 95% of U.S. towns. Compared with 1901–2000, the average now sits 1.1° higher. Picnics, hikes and garden evenings come into their own from May to September, with highs of 67–79°.
A year in Mossyrock at a glance
Each month’s typical high and low, and what it brings.
What stands out about Mossyrock’s climate
Compared with towns across the U.S., with Mossyrock’s place in Washington beside it.
What a year in Mossyrock feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 215 frost-free days a year
In half of years the last 32° night comes by April 7 and the first by November 13. Frost and day counts come from NOAA’s station at Mayfield Pwr Plt, WA, 5 miles from the town’s center, 450 ft lower.
The 2023 USDA map puts Mossyrock’s center in zone 8b: the coldest night of a typical winter, averaged over 1991–2020, reaches about 15°. 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 Mayfield Pwr Plt, WA, falls mostly in February. Precipitation (rain plus melted snow) adds up to 57 inches a year; December is the wettest month and July the driest. Rain or snow falls on about 177 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Mossyrock
96% 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 Mayfield Pwr Plt, WA.
Living with Mossyrock’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
215 frost-free days in zone 8b. The last frost comes by Apr 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 13.
Months with highs of 62–84° and lows of 40° or more: May, June, July, August and September. 0.8 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Mossyrock from natural hazards, river flooding is the largest share (55%); heat waves, cold waves, winter storms and ice storms together are 1%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Mossyrock and similar climates
TownRatings has no climate map of the towns around Mossyrock yet.
Climates most like Mossyrock’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 |
|---|---|---|---|---|
| Mossyrock, WA | 34° | 78° | 57" | 3.4" |
| Black Mountain, NC | 27° | 82° | 57" | 2.1" |
| Cottage Grove, OR | 35° | 82° | 47" | 2.7" |
| Fairfield Glade, TN | 27° | 84° | 57" | 4.9" |
| Big Stone Gap, VA | 26° | 84° | 52" | 9.2" |
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 Mossyrock averaged 1.1° warmer than the 1900s. The biggest change is in January (+3.0°).
A smaller shift than in 73% 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 Mossyrock compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Mossyrock’s place among Washington’s.
Mossyrock weather by month
Highs, lows and precipitation from NOAA’s grid at Mossyrock’s center; snow, wet days and snow on the ground from Mayfield Pwr Plt, WA. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 46° | 34° | 8.0" | 1.1" | 20 | 1 | 34° – 45° |
| February | 50° | 33° | 5.7" | 1.3" | 16 | 1 | 34° – 48° |
| March | 54° | 35° | 5.9" | 0.0" | 20 | 0 | 40° – 50° |
| April | 59° | 38° | 5.3" | 0.0" | 18 | 0 | 44° – 54° |
| May | 67° | 44° | 3.7" | 0.0" | 14 | 0 | 50° – 59° |
| June | 71° | 48° | 2.7" | 0.0" | 12 | 0 | 55° – 65° |
| July | 78° | 51° | 1.0" | 0.0" | 6 | 0 | 60° – 68° |
| August | 79° | 51° | 1.3" | 0.0" | 6 | 0 | 61° – 69° |
| September | 72° | 47° | 2.4" | 0.0" | 10 | 0 | 56° – 63° |
| October | 60° | 41° | 5.2" | 0.0" | 16 | 0 | 46° – 55° |
| November | 50° | 36° | 7.7" | 0.0" | 19 | 0 | 39° – 48° |
| December | 45° | 33° | 8.2" | 1.0" | 20 | 1 | 34° – 42° |
| Year | 61° | 41° | 57.0" | 3.4" | 177 | 2 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 34° to 48°. September is the most reliable, staying within 7°.
Where Mossyrock’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 Mossyrock’s center.
- Snow: Mayfield Pwr Plt, WA.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Mayfield Pwr Plt, WA, 5 miles from the town’s center, 450 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 Mossyrock’s climate
What is the weather like in Mossyrock?
A typical July afternoon reaches 78°, a January night drops to 34°, and about 3 inches of snow falls in a normal winter. Milder January nights than 78% of U.S. towns; cooler July afternoons than 96% of U.S. towns.
How cold does it get in Mossyrock in winter?
December nights average 33°. About 66 nights a year reach 32° or below. In the coldest December of the last 30 years the month averaged 34°.
How much snow does Mossyrock get?
About 3.4 inches in a normal winter at Mayfield Pwr Plt, WA, most of it in February, with snow on the ground about 2 days a year.
How hot does it get in Mossyrock?
July, with a typical high of 78° and a low of 51°. About 24 days a year reach 90° and 3 reach 100° (Mayfield Pwr Plt, WA).
When is the first and last frost in Mossyrock?
In half of years the last spring frost (32°) comes by April 7 and the first fall frost by November 13, about 215 frost-free days, at Mayfield Pwr Plt, WA.
What growing zone is Mossyrock in?
Zone 8b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 15°.
What is the best time of year to visit Mossyrock?
By one simple rule (highs of 62–84° and lows of 40° or more), May, June, July, August and September. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Mossyrock getting warmer?
Yes: 1991–2020 averaged 1.1° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 73% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Mossyrock.
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.