Sequim, WA climate
Sequim has mild winters and cool summers, with very little rain. A typical July afternoon reaches 71°, a January night drops to 34°, and about 1 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Sequim feels like
Winter
Spring
Summer
Fall
Sequim 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 | 45° | 34° | 2.0" | 0 | 16 | 0 | 33° – 44° |
| February | 47° | 34° | 1.5" | 0 | 14 | 0 | 34° – 47° |
| March | 51° | 36° | 1.8" | 0 | 15 | 0 | 40° – 48° |
| April | 56° | 39° | 1.4" | 0 | 12 | 0 | 43° – 53° |
| May | 62° | 44° | 1.2" | 0 | 11 | 0 | 49° – 57° |
| June | 66° | 49° | 1.0" | 0 | 9 | 0 | 54° – 62° |
| July | 71° | 51° | 0.6" | 0 | 5 | 0 | 58° – 65° |
| August | 72° | 52° | 0.6" | 0 | 5 | 0 | 58° – 65° |
| September | 67° | 48° | 1.0" | 0 | 9 | 0 | 55° – 61° |
| October | 57° | 42° | 1.9" | 0 | 13 | 0 | 47° – 54° |
| November | 49° | 37° | 3.0" | 0 | 17 | 0 | 40° – 47° |
| December | 44° | 34° | 2.5" | 1.4" | 17 | 0 | 35° – 42° |
| Year | 57° | 42° | 18.4" | 1.4" | 141 | 0 |
“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 Sequim
Sequim gets 18 inches of rain and melted snow a year. November is the wettest month and July the driest. Rain or snow falls on about 141 days a year.
About 181 frost-free days a year
In half of years the last 32° night comes by April 21 and the first one by October 20. That leaves about 181 frost-free days for gardens, longer than 54% of U.S. towns.
Heating and cooling a home in Sequim
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Sequim, 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 Sequim 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 Sequim averaged 1.2° warmer than the 1900s. The biggest change is in January (+2.6°). The shift is smaller than in 52% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Sequim’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 47°. August is the most reliable, staying within 7°.
Common questions about Sequim’s climate
What is the coldest month in Sequim?
December, with a typical high of 44° and a low of 34°.
What is the hottest month in Sequim?
August, with a typical high of 72° and a low of 52°.
How much snow does Sequim get?
About 1 inches in a normal winter, most of it in December.
When is the first frost in Sequim?
In half of years the first 32° night comes by October 20, and the last spring frost by April 21.
What is the rainiest month in Sequim?
November, with 3.0 inches of rain and melted snow. The year totals 18 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Sequim itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Sequim 2 E, WA (1 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.