Brinnon, WA climate
Brinnon has mild winters and pleasant summers, with plenty of rain. A typical July afternoon reaches 77°, a January night drops to 34°, and about 3 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Brinnon feels like
Winter
Spring
Summer
Fall
Brinnon 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° | 9.5" | 0.6" | 19 | 0 | 34° – 45° |
| February | 49° | 34° | 6.2" | 0.7" | 16 | 0 | 35° – 47° |
| March | 53° | 36° | 6.3" | 0.1" | 19 | 0 | 41° – 50° |
| April | 59° | 40° | 4.1" | 0 | 16 | 0 | 44° – 55° |
| May | 66° | 45° | 2.5" | 0 | 12 | 0 | 51° – 60° |
| June | 71° | 50° | 1.8" | 0 | 11 | 0 | 57° – 66° |
| July | 77° | 53° | 0.8" | 0 | 6 | 0 | 59° – 69° |
| August | 77° | 53° | 1.0" | 0 | 6 | 0 | 61° – 69° |
| September | 71° | 49° | 1.6" | 0 | 9 | 0 | 56° – 64° |
| October | 60° | 42° | 5.3" | 0 | 16 | 0 | 48° – 56° |
| November | 50° | 37° | 9.2" | 0.3" | 19 | 0 | 39° – 49° |
| December | 44° | 34° | 10.2" | 1.3" | 19 | 1 | 35° – 42° |
| Year | 60° | 42° | 58.6" | 3.0" | 167 | 2 |
“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 Brinnon
Brinnon gets 59 inches of rain and melted snow a year. December is the wettest month and July the driest. Rain or snow falls on about 167 days a year.
About 199 frost-free days a year
In half of years the last 32° night comes by April 11 and the first one by October 28. That leaves about 199 frost-free days for gardens, longer than 72% of U.S. towns.
Heating and cooling a home in Brinnon
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Brinnon, 98% of that work is heating and 2% 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 Brinnon 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 Brinnon averaged 1.3° warmer than the 1900s. The biggest change is in January (+2.8°). The shift is larger than in 53% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Brinnon’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 35° to 47°. September is the most reliable, staying within 7°.
Common questions about Brinnon’s climate
What is the coldest month in Brinnon?
December, with a typical high of 44° and a low of 34°.
What is the hottest month in Brinnon?
August, with a typical high of 77° and a low of 53°. About 5 days a year reach 90°.
How much snow does Brinnon get?
About 3 inches in a normal winter, most of it in December.
When is the first frost in Brinnon?
In half of years the first 32° night comes by October 28, and the last spring frost by April 11.
What is the rainiest month in Brinnon?
December, with 10.2 inches of rain and melted snow. The year totals 59 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Brinnon itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Bremerton, WA (13 mi, snow) and Quilcene 2 Sw, WA (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.