Coupeville, WA Climate: Temperature & Rain by Month
Pulled from NOAA NCEI 1991–2020 normals →: climate measurements used in PlainClimate's documented score
30-year climate normals (1991-2020) from Coupeville's primary NOAA station, COUPEVILLE 1 S.
The climate verdict for Coupeville
A compact 21.7°F seasonal swing gives Coupeville, Washington a steadier-than-extreme annual shape. NOAA reports an annual average of 50°F. Its climate comfort score of 73/100 (good) lands mid-pack nationally, exceeding 66% of station-mapped location scores.
- 50°F
- average temperature, NOAA 1991-2020 normal
- 73/100
- comfort score, above 66% of station-mapped location scores
- 21.7"
- annual precipitation · 3" snow
- 239 days
- growing season, frost-free days
Coupeville: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00451783 · Coupeville, WA 50°F mean · 21.7" precip
TEMP-COOL · RANK-MID · PHOTO-FINISH · PRCP-DRY · SWING-NARROW · COMF-MID · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 50°F
- RANK-MID #2,813
- PHOTO-FINISH ≈ Florence
- PRCP-DRY 21.7"
- SWING-NARROW 22°F
- COMF-MID 73/100
- LOAD-HEAT 5,402 HDD
- STN-1 USC00451783
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Florence, OR (+ 0.1 °F mean)
Instrument codes from this station's NOAA 1991–2020 normals, mean temperature, corpus warmth rank, photo-finish peer station, precipitation band, seasonal swing, comfort composite, degree-day load, and field book, not a livability rating.
Mean-temperature neighbourhood
Nationwide NOAA normal poles and nearest peers, not a reprint of every WA station list.
- Coupeville (this station) 50°F
- Hot Clearwater, WA 50°F
- Near Florence, OR 50°F
- Near Alsea FH, OR 50°F
- Near Forks, WA 50°F
Climate Living Index · Coupeville
Coupeville: 69/100 · grade C
Coupeville publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Coupeville, not an official NOAA rating. Rankings still use Comfort Score 73/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Normal heat + freeze calendar | 0 calendar days | 100/100 · A |
| Frost-free season | 239 days/year | 84/100 · B |
| Snowfall burden | 2.5 inches/year | 74/100 · B |
| Precipitation balance | 21.7 in · 13.3 from 35 in | 53/100 · D |
| Annual temperature balance | 50.2°F · 17.3° from 67.5°F | 41/100 · D |
Coupeville · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Coupeville is a temperate Köppen climate: Csb
Coldest-month mean 39.9°F and warmest-month mean 61.6°F place this station in temperate, dry-summer, warm summer climates (Csb). Class Csb is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: temperate, specifically temperate, dry-summer, warm summer.
- Köppen code
- Csb
- Group
- Temperate
- Warmest month
- 61.6°F
- Coldest month
- 39.9°F
Source: official public datasets monthly normals (1991–2020) at the city’s primary station. This is a station classification, not a mapped regional consensus.
National standing · heating-led station
Where Coupeville sits across the climate record
Three NOAA fields for Coupeville's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- 41st percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Annual precipitation
- Drier than 70%
- Coupeville's annual total ranks in the drier third of 6,352 measured normals.
- Seasonal temperature swing
- Narrower than 96%
- Warmest-to-coldest month gap for Coupeville is compact versus 6,861 complete station-years.
How Coupeville compares across U.S. station-mapped locations
Coupeville's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
73 Top 34% score exceeds 66% of 6,189 station-mapped location scores
- 0–10: 0 station-mapped locations (0%). Below this entry.
- 10–20: 0 station-mapped locations (0%). Below this entry.
- 20–30: 96 station-mapped locations (2%). Below this entry.
- 30–40: 280 station-mapped locations (5%). Below this entry.
- 40–50: 1,113 station-mapped locations (18%). Below this entry.
- 50–60: 1,329 station-mapped locations (21%). Below this entry.
- 60–70: 1,236 station-mapped locations (20%). Below this entry.
- 70–80: 650 station-mapped locations (11%). This entry sits in this band.
- 80–90: 921 station-mapped locations (15%). Above this entry.
- 90–100: 564 station-mapped locations (9%). Above this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Coupeville's measured station temperature trend
MethodologyAcross 65 complete annual observations from 1896 to 2018, COUPEVILLE 1 S warmed at a fitted rate of 0.05°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Coupeville primary station fitted change +0.05 °C/decade
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 44°F (7°C) | 37°F (3°C) | 40°F (5°C) | 2.5" | 0.0" | 7.3 | 0.0 |
| February | 47°F (8°C) | 36°F (2°C) | 42°F (5°C) | 1.9" | 0.0" | 7.8 | 0.0 |
| March | 51°F (11°C) | 38°F (4°C) | 45°F (7°C) | 2.0" | 0.3" | 4.0 | 0.0 |
| April | 57°F (14°C) | 42°F (5°C) | 49°F (10°C) | 1.9" | 0.0" | 0.4 | 0.0 |
| May | 62°F (17°C) | 47°F (8°C) | 54°F (12°C) | 1.7" | 0.0" | 0.0 | 0.0 |
| June | 65°F (18°C) | 50°F (10°C) | 58°F (14°C) | 1.3" | 0.0" | 0.0 | 0.0 |
| July | 70°F (21°C) | 53°F (12°C) | 61°F (16°C) | 0.8" | 0.0" | 0.0 | 0.4 |
| August | 71°F (21°C) | 53°F (12°C) | 62°F (16°C) | 0.7" | 0.0" | 0.0 | 0.1 |
| September | 66°F (19°C) | 49°F (10°C) | 58°F (14°C) | 1.2" | 0.0" | 0.0 | 0.0 |
| October | 56°F (14°C) | 45°F (7°C) | 51°F (10°C) | 2.1" | 0.0" | 0.7 | 0.0 |
| November | 49°F (9°C) | 40°F (4°C) | 44°F (7°C) | 3.1" | 0.6" | 4.1 | 0.0 |
| December | 44°F (6°C) | 36°F (2°C) | 40°F (4°C) | 2.6" | 1.6" | 8.1 | 0.0 |
The year, day by day
The calendar barely moves in Coupeville: no date carries a normal high of 90°F or a normal low at freezing. The year runs between 36°F near December 15 and 71°F near July 27.
No freezing date
Not one calendar date in the 1991–2020 record carries a normal low at or below 32°F. The coldest normal low of the year is 36°F around December 15.
Where the wet dates fall
The likeliest wet date is November 27, when 52% of years recorded at least a hundredth of an inch. The driest is July 31 at 12%. Summed across the calendar, that is about 131 wet dates a year.
The widest day
July 27 carries the biggest normal gap between afternoon and dawn, 18°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Coupeville.
Where Coupeville Stands Nationally
Among the steadiest day-night climates ranked: even the widest normal daily swing holds to roughly 18°F.
Coupeville earns one nationally notable standing (outer quintile) against 6,860 NOAA 1991–2020 normals stations, middle-of-the-pack metrics stay silent here.
Monthly Precipitation
Average monthly rainfall and snowfall
15.8 days with precipitation
12.3 days with precipitation
Snow: 0.3"
13.9 days with precipitation
11.7 days with precipitation
9.4 days with precipitation
8.9 days with precipitation
4.3 days with precipitation
4.1 days with precipitation
7.6 days with precipitation
11.9 days with precipitation
Snow: 0.6"
15.7 days with precipitation
Snow: 1.6"
15.6 days with precipitation
Coupeville spreads its precipitation across the year
Neither half of the year dominates here: June through August take 13% of the annual total and December through February 32%, with neither reaching the 35% that would mark a distinct wet season. Coupeville has no dry season to plan around, though it does carry an unusually narrow 21.7°F seasonal spread.
The gap between the wettest and driest month still matters: November averages 3.1" and August 0.7". The three wettest months together take 38% of the year, against the 25% a perfectly flat distribution would give them.
Shares are computed from this station's own 1991-2020 monthly precipitation normals. "Spread across the year" means neither the June-August nor the December-February share reaches 35%; it describes an average year, not the variability of any single one.
Rain reaches Coupeville in small, frequent amounts
Coupeville records about 131 days with measurable precipitation a year and 21.7" in total, which works out to roughly 0.17 inches on an average wet day. Precipitation on 36% of all days, arriving that lightly, is the damp many-grey-days pattern rather than the storm-driven one.
Places in this band read as wetter than their annual totals suggest, because what people notice is the number of overcast days, not the depth in the gauge.
- Most wet days: January, about 16 of them.
- Fewest: August, about 4.
- Average depth per wet day: 0.17 inches.
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year and say nothing about the heaviest single storm on record.
Snow reaches Coupeville, but rarely amounts to much
The normals record 2.5 inches of snow a year here, most likely in December. That is a real but marginal amount: enough that snow is part of the local record, not enough to define the winter.
A figure in this range usually reflects a handful of events that melt quickly rather than a season of accumulation; about 1 days a year record any measurable snow at all.
NOAA 1991-2020 normals. An average across thirty years can smooth away a single heavy winter, so a small annual figure does not mean a significant snowfall is impossible.
Frost Dates & Growing Season
First Fall Freeze
November 11
50% probability date
Last Spring Freeze
March 17
50% probability date
Growing Season
239 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
5,402
Higher = more heating needed
Cooling Degree Days
22
Higher = more cooling needed
Warmest Month
August
Coldest Month
December
Nationwide similar cities
Other rankable U.S. places outside WA closest to Coupeville on two NOAA annual-normal axes (mean temperature and annual precipitation). Chip rows use distinct link sets.
Closest by average temperature
Nearest out-of-state peers by annual mean temperature (50°F here).
- Ainsworth, NE 50°F · 0.0°F off
- Aurora, IL 50°F · 0.0°F off
- Blair, NE 50°F · 0.0°F off
- Bloomington, IL 50°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (21.7" here), excluding temperature-peer places.
- Grand Forks, ND 21.7" · 0.0" off
- Montezuma, KS 21.7" · 0.0" off
- Snyder, TX 21.8" · 0.0" off
- Winchester, ID 21.8" · 0.0" off
Data-derived climate profile
How Coupeville's climate pattern fits together
heating led · moderate · low swing
Heating is the larger measured load in Coupeville, at 5,402 degree days versus 22 for cooling. Unlike a strongly continental record, however, its 21.7°F month-to-month range is compact; persistent cool-season demand matters more than a dramatic summer-to-winter reversal.
Coupeville's frost-free season lasts about 239 days, a middle-length window whose endpoints matter more than the annual average. It describes freeze probability, not year-specific planting conditions.
Temperature varies within a narrow 21.7°F band across the normal year. August and December mark the typical warm and cold ends of the calendar. The annual average is 50°F. Monthly rows still matter, but they refine a steady profile rather than reveal two climatic extremes.
Coupeville's 21.7 inches of annual precipitation falls in PlainClimate's middle band, so “wet” or “dry” is not the leading description. Annual snowfall totals 2.5 inches. Temperature balance and the calendar distribution carry more information than the annual moisture label alone.
These labels group NOAA 1991-2020 normals from Coupeville's primary station, so the winter figures are a thirty-year average and not a floor: a single hard season can run well below them. Treat each band as a descriptive range for Coupeville, not an official NOAA class or a year-ahead forecast.
Questions about Coupeville's climate
How much rain does Coupeville get? ▼
How much energy does heating and cooling require in Coupeville? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Coupeville's primary station: COUPEVILLE 1 S (USC00451783). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The 2024 Census Gazetteer identifies the exact name-and-state match as an incorporated place (GEOID 5315185). Match rule for Coupeville: exact normalized name + state only, no fuzzy expansion, so nearby differently spelled facilities stay unmatched.
On this page every temperature, precipitation, and derived score for Coupeville comes from its primary NOAA station record. No figure on this page is typed in by an editor - each value is rendered from NOAA 1991-2020 U.S. Climate Normals. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 1991–2020 normals.