Photo: SounderBruce · CC BY-SA 4.0Few U.S. towns get more rain and snow than Cathlamet: 70 inches a year
Midsummer highs settle at about 70°. In July, afternoons here are cooler than in almost every U.S. town. January has warmed most since 1901–2000, part of a 1.3° rise. Long walks are most pleasant from May to September, when afternoons reach 62–71°.
A year in Cathlamet at a glance
Each month’s typical high and low, and what it brings.
What stands out about Cathlamet’s climate
Compared with towns across the U.S., with Cathlamet’s place in Washington beside it.
What a year in Cathlamet feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 232 frost-free days a year
In half of years the last 32° night comes by March 26 and the first by November 11. Frost and day counts come from NOAA’s station at Astoria Rgnl Airport, 24 miles from the town’s center, at about the same height.
The 2023 USDA map puts Cathlamet’s center in zone 8b: the coldest night of a typical winter, averaged over 1991–2020, reaches about 17°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
About 3 inches of snow a winter
Snow, measured at Cathlamet 6ne, WA, falls mostly in December. Precipitation (rain plus melted snow) adds up to 70 inches a year; 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
Heating and cooling a home in Cathlamet
Nearly all of the work is heating: a normal year has almost no cooling days. Months averaging under 55° run from October through May.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Astoria Rgnl Airport.
Living with Cathlamet’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
232 frost-free days in zone 8b. The last frost comes by Mar 26 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 11.
Months with highs of 62–84° and lows of 40° or more: May, June, July, August and September. 0.3 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Cathlamet from natural hazards, tsunamis are the largest share (34%); heat waves, cold waves, winter storms and ice storms together are 4%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Cathlamet and its neighbors
Lower Elochoman has the coldest January nights next door (35°, 2° colder) and Lower Elochoman the hottest July afternoons (72°, 2° warmer). Differences under a degree are within what the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Cathlamet’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 |
|---|---|---|---|---|
| Cathlamet, WA | 37° | 70° | 70" | 3.2" |
| Florence, OR | 40° | 66° | 73" | 0.6" |
| Crescent City, CA | 42° | 64° | 69" | 0.0" |
| Boone, NC | 24° | 79° | 58" | 26" |
| Nantucket, MA | 26° | 76° | 44" | 25" |
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value. Snow and frost-free days come from the nearest weather station, so neighbors often share them.
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°).
A smaller shift than in 54% 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 Cathlamet compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Cathlamet’s place among Washington’s.
Cathlamet weather by month
Highs, lows and precipitation from NOAA’s grid at Cathlamet’s center; snow, wet days and snow on the ground from Cathlamet 6ne, WA. 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" | 0.0" | 20 | 0 | 42° – 51° |
| April | 57° | 41° | 5.6" | 0.0" | 18 | 0 | 45° – 54° |
| May | 62° | 46° | 3.5" | 0.0" | 14 | 0 | 50° – 57° |
| June | 66° | 50° | 2.5" | 0.0" | 12 | 0 | 54° – 63° |
| July | 70° | 53° | 0.8" | 0.0" | 6 | 0 | 58° – 65° |
| August | 71° | 53° | 1.1" | 0.0" | 6 | 0 | 59° – 65° |
| September | 68° | 49° | 2.9" | 0.0" | 8 | 0 | 55° – 62° |
| October | 61° | 44° | 6.5" | 0.0" | 15 | 0 | 48° – 57° |
| November | 53° | 40° | 10.5" | 0.0" | 20 | 0 | 42° – 51° |
| December | 48° | 37° | 10.9" | 1.9" | 21 | 0 | 38° – 46° |
| Year | 59° | 44° | 69.7" | 3.2" | 175 | 1 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 38° to 50°. August is the most reliable, staying within 6°.
Where Cathlamet’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 Cathlamet’s center.
- Snow: Cathlamet 6ne, WA.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Astoria Rgnl Airport, 24 miles from the town’s center, at about the same height; 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 Cathlamet’s climate
What is the weather like in Cathlamet?
A typical July afternoon reaches 70°, a January night drops to 37°, and about 3 inches of snow falls in a normal winter. Milder January nights than 84% of U.S. towns; cooler July afternoons than all but 76 U.S. towns.
How cold does it get in Cathlamet in winter?
February nights average 36°. About 29 nights a year reach 32° or below. In the coldest February of the last 30 years the month averaged 38°.
How much snow does Cathlamet get?
About 3.2 inches in a normal winter at Cathlamet 6ne, WA, most of it in December, with snow on the ground about 1 days a year.
How hot does it get in Cathlamet?
July, with a typical high of 70°. 90° days are rare: none in a normal year at Astoria Rgnl Airport.
When is the first and last frost in Cathlamet?
In half of years the last spring frost (32°) comes by March 26 and the first fall frost by November 11, about 232 frost-free days, at Astoria Rgnl Airport.
What growing zone is Cathlamet in?
Zone 8b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 17°.
What is the best time of year to visit Cathlamet?
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 Cathlamet getting warmer?
Yes: 1991–2020 averaged 1.3° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 54% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Cathlamet.
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.