Photo: brewbooks · CC BY-SA 2.0Coupeville sits near the bottom of U.S. towns for July heat
Nights in January average 36°. November is the wettest month, July the driest. It is a dry place: less rain and snow fall here than on 88% of U.S. towns. Tender plants can go out after about March 17; in half of years the first frost comes by November 11.
A year in Coupeville at a glance
Each month’s typical high and low, and what it brings.
What stands out about Coupeville’s climate
Compared with towns across the U.S., with Coupeville’s place in Washington beside it.
What a year in Coupeville feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 237 frost-free days a year
In half of years the last 32° night comes by March 17 and the first by November 11. Frost and day counts come from NOAA’s station at Coupeville 1 S, WA, 1.0 miles from the town’s center, at about the same height.
The 2023 USDA map puts Coupeville’s center in zone 8b: the coldest night of a typical winter, averaged over 1991–2020, reaches about 18°. 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 Coupeville 1 S, WA, falls mostly in December. Precipitation (rain plus melted snow) adds up to 23 inches a year; November is the wettest month and July the driest. Rain or snow falls on about 131 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Coupeville
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 Coupeville 1 S, WA.
Living with Coupeville’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
237 frost-free days in zone 8b. The last frost comes by Mar 17 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. 2.6 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Coupeville from natural hazards, earthquakes are the largest share (66%); heat waves, cold waves, winter storms and ice storms together are 4%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Coupeville and similar climates
TownRatings has no climate map of the towns around Coupeville yet.
Climates most like Coupeville’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 |
|---|---|---|---|---|
| Coupeville, WA | 36° | 71° | 23" | 2.5" |
| Watsonville, CA | 41° | 73° | 22" | 0.0" |
| Makawao, HI | 53° | 75° | 23" | 0.0" |
| Hillsboro, OR | 35° | 81° | 38" | 5.2" |
| Nantucket, MA | 26° | 76° | 44" | 25" |
Temperatures and precipitation come from NOAA’s 5 km grid; snow and day counts from the stations named on this page.
Warmer than it used to be
The last 30 years in Coupeville averaged 1.2° warmer than the 1900s. The biggest change is in January (+2.6°).
A smaller shift than in 66% 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 Coupeville compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Coupeville’s place among Washington’s.
Coupeville weather by month
Highs, lows and precipitation from NOAA’s grid at Coupeville’s center; snow, wet days and snow on the ground from Coupeville 1 S, WA. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 47° | 36° | 2.8" | 0.0" | 16 | 0 | 35° – 46° |
| February | 49° | 36° | 2.0" | 0.0" | 12 | 0 | 37° – 48° |
| March | 53° | 38° | 2.0" | 0.3" | 14 | 0 | 41° – 49° |
| April | 58° | 41° | 1.8" | 0.0" | 12 | 0 | 45° – 54° |
| May | 62° | 46° | 1.7" | 0.0" | 9 | 0 | 51° – 57° |
| June | 67° | 49° | 1.3" | 0.0" | 9 | 0 | 55° – 61° |
| July | 71° | 52° | 0.7" | 0.0" | 4 | 0 | 59° – 64° |
| August | 71° | 52° | 0.8" | 0.0" | 4 | 0 | 59° – 64° |
| September | 67° | 49° | 1.2" | 0.0" | 8 | 0 | 55° – 61° |
| October | 58° | 44° | 2.3" | 0.0" | 12 | 0 | 49° – 56° |
| November | 51° | 39° | 3.4" | 0.6" | 16 | 0 | 41° – 50° |
| December | 46° | 36° | 2.7" | 1.6" | 16 | 0 | 36° – 45° |
| Year | 58° | 43° | 22.8" | 2.5" | 131 | 0 |
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 48°. August is the most reliable, staying within 5°.
Where Coupeville’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 Coupeville’s center.
- Snow: Coupeville 1 S, WA (NOAA station in town).
- Frost, freezing nights, 90° and 100° days, heating and cooling: Coupeville 1 S, WA, 1.0 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 Coupeville’s climate
What is the weather like in Coupeville?
A typical July afternoon reaches 71°, a January night drops to 36°, and about 3 inches of snow falls in a normal winter. Milder January nights than 83% of U.S. towns; cooler July afternoons than all but 93 U.S. towns.
How cold does it get in Coupeville in winter?
December nights average 36°. About 32 nights a year reach 32° or below. In the coldest December of the last 30 years the month averaged 36°.
How much snow does Coupeville get?
About 2.5 inches in a normal winter at Coupeville 1 S, WA, most of it in December, with snow on the ground about 0 days a year.
How hot does it get in Coupeville?
July, with a typical high of 71°. 90° days are rare: none in a normal year at Coupeville 1 S, WA.
When is the first and last frost in Coupeville?
In half of years the last spring frost (32°) comes by March 17 and the first fall frost by November 11, about 237 frost-free days, at Coupeville 1 S, WA.
What growing zone is Coupeville in?
Zone 8b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 18°.
What is the best time of year to visit Coupeville?
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 Coupeville getting warmer?
Yes: 1991–2020 averaged 1.2° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 66% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Coupeville.
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.