East Cathlamet has mild winters and cool summers, with plenty of rain
A typical July afternoon reaches 71°, a January night drops to 36°, and about 3 inches of snow falls in a normal winter.
A year in East Cathlamet at a glance
Each month’s typical high and low, and what it brings.
What stands out about East Cathlamet’s climate
Read from where East Cathlamet sits among Washington’s towns. The page puts what stands out first.
What a year in East Cathlamet feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
3 inches of snow, 67 of rain and melt
December is the wettest month and July the driest. Rain or snow falls on about 175 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Warmer than it used to be
The last 30 years in East Cathlamet averaged 1.3° warmer than the 1900s. The biggest change is in January (+3.0°).
A bigger shift than in 58% of U.S. towns.
Change by month
About 184 frost-free days a year
In half of years the last 32° night comes by April 24 and the first by October 24.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
Living with East Cathlamet’s climate
What the numbers mean for a garden, a driveway, a furnace and a free afternoon.
184 frost-free days. The last frost comes by Apr 24 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 24.
About 3" in a normal winter.
Months averaging under 55° run from October through May. Heating is 98% of the year’s heating-and-cooling load.
About 4 days a year reach 90°, and July afternoons average 71°.
The nicest months are May, June, July, August and September. 2.6 miles of trails are waiting.
Parks & trails →Normals are averages. Ice storms, nor’easters, floods and heat waves are on the natural hazards page.
Natural hazards →How East Cathlamet compares
Against every U.S. town on TownTapestry, each counted once, with its place in Washington.
East 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 | 48° | 36° | 10.0" | 1.1" | 20 | 1 | 36° – 46° |
| February | 51° | 35° | 7.0" | 0.2" | 16 | 0 | 37° – 49° |
| March | 54° | 37° | 7.6" | 0 | 20 | 0 | 41° – 51° |
| April | 58° | 39° | 5.4" | 0 | 18 | 0 | 44° – 53° |
| May | 63° | 44° | 3.4" | 0 | 14 | 0 | 49° – 57° |
| June | 66° | 48° | 2.4" | 0 | 12 | 0 | 54° – 62° |
| July | 71° | 52° | 0.8" | 0 | 6 | 0 | 58° – 65° |
| August | 72° | 52° | 1.0" | 0 | 6 | 0 | 59° – 65° |
| September | 69° | 48° | 2.7" | 0 | 8 | 0 | 55° – 62° |
| October | 61° | 43° | 6.2" | 0 | 15 | 0 | 48° – 56° |
| November | 52° | 38° | 10.3" | 0 | 20 | 0 | 40° – 50° |
| December | 47° | 35° | 10.8" | 1.9" | 21 | 0 | 37° – 45° |
| Year | 59° | 42° | 67.4" | 3.2" | 175 | 1 |
Heating and cooling a home in East Cathlamet
98% of the work is heating, so the furnace matters far more than the air conditioner.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. Source: NOAA station normals.
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 37° to 49°. August is the most reliable, staying within 6°.
Common questions about East Cathlamet’s climate
What is the coldest month in East Cathlamet?
February, with a typical high of 51° and a low of 35°.
What is the hottest month in East Cathlamet?
August, with a typical high of 72° and a low of 52°. About 4 days a year reach 90°.
How much snow does East Cathlamet get?
About 3 inches in a normal winter, most of it in December.
When is the first frost in East Cathlamet?
In half of years the first 32° night comes by October 24, and the last spring frost by April 24.
What is the rainiest month in East Cathlamet?
December, with 10.8 inches of rain and melted snow. The year totals 67 inches.
Neighbors talk weather
Gardens, snow, and the best days of the year in East Cathlamet.
Your answer becomes a post in Town Square.
Temperatures and rainfall come from NOAA’s gridded climate normals for East Cathlamet itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Cathlamet 6ne, WA (2 mi, snow) and Clatskanie, OR (10 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. Today’s forecast: National Weather Service.