Mossyrock, WA climate
Mossyrock has mild winters and pleasant summers, with plenty of rain. A typical July afternoon reaches 78°, a January night drops to 34°, and about 3 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Mossyrock feels like
Winter
Spring
Summer
Fall
Mossyrock weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 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 | 20 | 0 | 40° – 50° |
| April | 59° | 38° | 5.3" | 0 | 18 | 0 | 44° – 54° |
| May | 67° | 44° | 3.7" | 0 | 14 | 0 | 50° – 59° |
| June | 71° | 48° | 2.7" | 0 | 12 | 0 | 55° – 65° |
| July | 78° | 51° | 1.0" | 0 | 6 | 0 | 60° – 68° |
| August | 79° | 51° | 1.3" | 0 | 6 | 0 | 61° – 69° |
| September | 72° | 47° | 2.4" | 0 | 10 | 0 | 56° – 63° |
| October | 60° | 41° | 5.2" | 0 | 16 | 0 | 46° – 55° |
| November | 50° | 36° | 7.7" | 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 |
“Wet days” have at least 0.01" of rain or melted snow. “Snow on ground” counts days with 1" or more. The 30-year range is the coldest and warmest that month’s average temperature got between 1991 and 2020.
Rain and snow in Mossyrock
Mossyrock gets 57 inches of rain and melted snow a year. December is the wettest month and July the driest. Rain or snow falls on about 177 days a year.
About 215 frost-free days a year
In half of years the last 32° night comes by April 7 and the first one by November 13. That leaves about 215 frost-free days for gardens, longer than 80% of U.S. towns.
Heating and cooling a home in Mossyrock
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Mossyrock, 96% of that work is heating and 4% is cooling, so the furnace matters far more than the air conditioner.
Degree days measure how far each day’s average temperature falls below or rises above 65°, added up over a year. Source: NOAA station normals.
How Mossyrock compares
Compared with every U.S. town and city on TownTapestry, each counted once.
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°). The shift is smaller than in 65% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Mossyrock’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. February swings the most: between 1991 and 2020 its average temperature ranged from 34° to 48°. September is the most reliable, staying within 7°.
Common questions about Mossyrock’s climate
What is the coldest month in Mossyrock?
December, with a typical high of 45° and a low of 33°.
What is the hottest month in Mossyrock?
August, with a typical high of 79° and a low of 51°. About 24 days a year reach 90°.
How much snow does Mossyrock get?
About 3 inches in a normal winter, most of it in February.
When is the first frost in Mossyrock?
In half of years the first 32° night comes by November 13, and the last spring frost by April 7.
What is the rainiest month in Mossyrock?
December, with 8.2 inches of rain and melted snow. The year totals 57 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Mossyrock itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Mayfield Pwr Plt, WA (5 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.