Cathlamet, WA climate
Cathlamet has mild winters and cool summers, with plenty of rain. A typical July afternoon reaches 70°, a January night drops to 37°, and about 3 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Cathlamet feels like
Winter
Spring
Summer
Fall
Cathlamet 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° | 10.3" | 1.1" | 20 | 1 | 37° – 47° |
| February | 51° | 36° | 7.2" | 0.2" | 16 | 0 | 38° – 50° |
| March | 54° | 38° | 7.8" | 0 | 20 | 0 | 42° – 51° |
| April | 57° | 41° | 5.6" | 0 | 18 | 0 | 45° – 54° |
| May | 62° | 46° | 3.5" | 0 | 14 | 0 | 50° – 57° |
| June | 66° | 50° | 2.5" | 0 | 12 | 0 | 54° – 63° |
| July | 70° | 53° | 0.8" | 0 | 6 | 0 | 58° – 65° |
| August | 71° | 53° | 1.1" | 0 | 6 | 0 | 59° – 65° |
| September | 68° | 49° | 2.9" | 0 | 8 | 0 | 55° – 62° |
| October | 61° | 44° | 6.5" | 0 | 15 | 0 | 48° – 57° |
| November | 53° | 40° | 10.5" | 0 | 20 | 0 | 42° – 51° |
| December | 48° | 37° | 10.9" | 1.9" | 21 | 0 | 38° – 46° |
| Year | 59° | 44° | 69.7" | 3.2" | 175 | 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 Cathlamet
Cathlamet gets 70 inches of rain and melted snow a year. December is the wettest month and July the driest. Rain or snow falls on about 175 days a year.
About 233 frost-free days a year
In half of years the last 32° night comes by March 30 and the first one by November 18. That leaves about 233 frost-free days for gardens, longer than 87% of U.S. towns.
Heating and cooling a home in Cathlamet
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Cathlamet, 99% of that work is heating and 1% 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.
Cathlamet and its neighbors
Cathlamet borders 2 towns with climate data. January nights across them vary by 1.5°. Lower Elochoman has both the coldest January nights (35°) and the hottest July afternoons (72°). Cathlamet’s January low is 37° and its July high 70°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Cathlamet 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 Cathlamet averaged 1.3° warmer than the 1900s. The biggest change is in January (+3.0°). The shift is larger than in 57% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Cathlamet’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 38° to 50°. August is the most reliable, staying within 6°.
Common questions about Cathlamet’s climate
What is the coldest month in Cathlamet?
February, with a typical high of 51° and a low of 36°.
What is the hottest month in Cathlamet?
August, with a typical high of 71° and a low of 53°. About 1 days a year reach 90°.
How much snow does Cathlamet get?
About 3 inches in a normal winter, most of it in December.
When is the first frost in Cathlamet?
In half of years the first 32° night comes by November 18, and the last spring frost by March 30.
What is the rainiest month in Cathlamet?
December, with 10.9 inches of rain and melted snow. The year totals 70 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Cathlamet itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Cathlamet 6ne, WA (3 mi, snow) and Ft Clatsop Natl Mem, OR (24 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.