Copalis Beach, WA climate
Copalis Beach has mild winters and cool summers, with plenty of rain. A typical July afternoon reaches 66°, a January night drops to 37°, and snow is almost unheard of.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Copalis Beach feels like
Winter
Spring
Summer
Fall
Copalis Beach 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 | 49° | 37° | 13.3" | 0 | 22 | 0 | 37° – 47° |
| February | 50° | 36° | 8.2" | 0.1" | 19 | 0 | 37° – 49° |
| March | 53° | 38° | 10.1" | 0.2" | 22 | 0 | 42° – 50° |
| April | 56° | 40° | 6.8" | 0 | 19 | 0 | 44° – 53° |
| May | 60° | 45° | 3.8" | 0 | 14 | 0 | 49° – 56° |
| June | 63° | 49° | 2.9" | 0 | 12 | 0 | 53° – 58° |
| July | 66° | 51° | 1.2" | 0 | 7 | 0 | 56° – 62° |
| August | 67° | 52° | 2.0" | 0 | 7 | 0 | 57° – 61° |
| September | 66° | 49° | 3.4" | 0 | 9 | 0 | 55° – 61° |
| October | 59° | 44° | 9.1" | 0 | 18 | 0 | 48° – 57° |
| November | 52° | 39° | 13.2" | 0.2" | 22 | 0 | 42° – 51° |
| December | 48° | 36° | 13.1" | 0 | 23 | 0 | 38° – 45° |
| Year | 57° | 43° | 87.1" | 0.5" | 192 | 1 |
“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 Copalis Beach
Copalis Beach gets 87 inches of rain and melted snow a year. January is the wettest month and July the driest. Rain or snow falls on about 192 days a year.
About 228 frost-free days a year
In half of years the last 32° night comes by March 30 and the first one by November 14. That leaves about 228 frost-free days for gardens, longer than 85% of U.S. towns.
Heating and cooling a home in Copalis Beach
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Copalis Beach, 100% of that work is heating and 0% 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 Copalis Beach 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 Copalis Beach averaged 1.1° warmer than the 1900s. The biggest change is in January (+2.8°). The shift is smaller than in 63% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Copalis Beach’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 37° to 49°. August is the most reliable, staying within 5°.
Common questions about Copalis Beach’s climate
What is the coldest month in Copalis Beach?
December, with a typical high of 48° and a low of 36°.
What is the hottest month in Copalis Beach?
August, with a typical high of 67° and a low of 52°.
How much snow does Copalis Beach get?
Almost none. A normal year brings 0.5 inches.
When is the first frost in Copalis Beach?
In half of years the first 32° night comes by November 14, and the last spring frost by March 30.
What is the rainiest month in Copalis Beach?
January, with 13.3 inches of rain and melted snow. The year totals 87 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Copalis Beach itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Aberdeen, WA (19 mi, snow) and Hoquiam Bowerman Airport, WA (15 mi, frost, heat and degree days). Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.