Blaine, 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 Blaine's primary NOAA station, BLAINE.
The climate verdict for Blaine
A compact 24.8°F seasonal swing gives Blaine, Washington a steadier-than-extreme annual shape. NOAA reports an annual average of 51°F. Its climate comfort score of 68/100 (good) lands mid-pack nationally, exceeding 56% of station-mapped location scores.
- 51°F
- yearly average temperature, NOAA normal
- 68/100
- comfort score, above 56% of station-mapped location scores
- 41.8"
- annual precipitation · 9" snow
- 218 days
- frost-free growing season
Blaine: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00450729 · Blaine, WA 51°F mean · 41.8" precip
TEMP-COOL · RANK-MID · PHOTO-FINISH · PRCP-MID · SWING-NARROW · COMF-MID · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 51°F
- RANK-MID #3,019
- PHOTO-FINISH ≈ Friday Harbor
- PRCP-MID 41.8"
- SWING-NARROW 25°F
- COMF-MID 68/100
- LOAD-HEAT 5,186 HDD
- STN-1 USC00450729
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Friday Harbor, WA (+ 0 °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.
- Blaine (this station) 51°F
- Cold Olga, WA 51°F
- Hot Matlock, WA 51°F
- Near Friday Harbor, WA 51°F
- Near Grayland, WA 51°F
Climate Living Index · Blaine
Blaine: 72/100 · grade B
Blaine publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Blaine, not an official NOAA rating. Rankings still use Comfort Score 68/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Normal heat + freeze calendar | 0 calendar days | 100/100 · A |
| Frost-free season | 218 days/year | 76/100 · B |
| Precipitation balance | 41.8 in · 6.8 from 35 in | 76/100 · B |
| Snowfall burden | 9.3 inches/year | 64/100 · C |
| Annual temperature balance | 50.9°F · 16.6° from 67.5°F | 44/100 · D |
Blaine · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Blaine is a temperate Köppen climate: Csb
Coldest-month mean 39.2°F and warmest-month mean 64.0°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
- 64.0°F
- Coldest month
- 39.2°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 Blaine sits across the climate record
Three NOAA fields for Blaine's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- 44th percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Annual precipitation
- 62nd percentile wetness
- Neither arid nor torrential versus 6,352 station totals.
- Seasonal temperature swing
- Narrower than 95%
- Warmest-to-coldest month gap for Blaine is compact versus 6,861 complete station-years.
How Blaine compares across U.S. station-mapped locations
Blaine's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
68 Top 44% score exceeds 56% 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%). This entry sits in this band.
- 70–80: 650 station-mapped locations (11%). Above this entry.
- 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
Blaine's measured station temperature trend
MethodologyAcross 73 complete annual observations from 1903 to 2020, BLAINE warmed at a fitted rate of 0.13°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Blaine primary station fitted change +0.13 °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 | 45°F (7°C) | 34°F (1°C) | 39°F (4°C) | 6.2" | 3.7" | 11.6 | 0.0 |
| February | 48°F (9°C) | 35°F (1°C) | 41°F (5°C) | 3.4" | 0.8" | 10.6 | 0.0 |
| March | 52°F (11°C) | 38°F (3°C) | 45°F (7°C) | 4.2" | 1.0" | 6.7 | 0.0 |
| April | 58°F (14°C) | 42°F (5°C) | 50°F (10°C) | 3.0" | 0.0" | 2.1 | 0.0 |
| May | 64°F (18°C) | 47°F (8°C) | 56°F (13°C) | 2.6" | 0.0" | 0.2 | 0.0 |
| June | 69°F (20°C) | 52°F (11°C) | 60°F (16°C) | 1.9" | 0.0" | 0.1 | 0.0 |
| July | 73°F (23°C) | 55°F (13°C) | 64°F (18°C) | 1.1" | 0.0" | 0.0 | 0.0 |
| August | 73°F (23°C) | 55°F (13°C) | 64°F (18°C) | 1.1" | 0.0" | 0.0 | 0.0 |
| September | 67°F (19°C) | 50°F (10°C) | 59°F (15°C) | 2.2" | 0.0" | 0.0 | 0.0 |
| October | 57°F (14°C) | 44°F (7°C) | 51°F (10°C) | 4.4" | 0.1" | 1.3 | 0.0 |
| November | 50°F (10°C) | 38°F (3°C) | 44°F (7°C) | 6.1" | 0.4" | 6.6 | 0.0 |
| December | 44°F (7°C) | 34°F (1°C) | 39°F (4°C) | 5.6" | 3.3" | 12.5 | 0.0 |
The year, day by day
The calendar barely moves in Blaine: no date carries a normal high of 90°F or a normal low at freezing. The year runs between 34°F near December 27 and 74°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 34°F around December 27.
Where the wet dates fall
The likeliest wet date is November 22, when 63% of years recorded at least a hundredth of an inch. The driest is July 29 at 18%. Summed across the calendar, that is about 162 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 Blaine.
Where Blaine Stands Nationally
Among the steadiest day-night climates ranked: even the widest normal daily swing holds to roughly 18°F.
Blaine 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
Snow: 3.7"
18.6 days with precipitation
Snow: 0.8"
14.8 days with precipitation
Snow: 1.0"
17.8 days with precipitation
14.6 days with precipitation
10.9 days with precipitation
10.2 days with precipitation
5.8 days with precipitation
6.3 days with precipitation
9.0 days with precipitation
Snow: 0.1"
15.7 days with precipitation
Snow: 0.4"
19.0 days with precipitation
Snow: 3.3"
19.1 days with precipitation
Blaine's wet season runs through the cold months
December, January and February carry 36% of the year's precipitation here, while June through August contribute 10%. That is the cool-season-dominant pattern of the West Coast and the higher inland West, where storm tracks swing south in winter and summer turns dry; the thermometer meanwhile shows an unusually narrow 24.8°F seasonal spread.
- Wettest month
- January, 6.2"
- Driest month
- August, 1.1"
- Wettest three months
- January, November, December (43% of the year)
Shares are computed from this station's own 1991-2020 monthly precipitation normals. A cool-season label means the December-February share reaches 35%. Where snow falls, the monthly figures above report liquid-equivalent precipitation, so a wet winter month is not necessarily a rainy one.
How Blaine's precipitation splits across the calendar
About 162 days a year record measurable precipitation here, carrying 41.8" between them, or roughly 0.26 inches on a typical wet day. That sits in the middle band: neither the many-light-days pattern of the Pacific Northwest and the Great Lakes, nor the few-heavy-events pattern of the Gulf and the desert Southwest.
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 Blaine, but rarely amounts to much
The normals record 9.3 inches of snow a year here, most likely in January. 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 3 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 4
50% probability date
Last Spring Freeze
March 31
50% probability date
Growing Season
218 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
5,186
Higher = more heating needed
Cooling Degree Days
67
Higher = more cooling needed
Warmest Month
July
Coldest Month
December
Nationwide similar cities
Other rankable U.S. places outside WA closest to Blaine 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 (51°F here).
- Belington, WV 51°F · 0.0°F off
- Bland, VA 51°F · 0.0°F off
- Des Moines, IA 51°F · 0.0°F off
- Falls City, OR 51°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (41.8" here), excluding temperature-peer places.
- Washington, DC 41.8" · 0.0" off
- Lowville, NY 41.8" · 0.0" off
- Mannford, OK 41.8" · 0.0" off
- New Castle, PA 41.8" · 0.0" off
Data-derived climate profile
How Blaine's climate pattern fits together
heating led · moderate · low swing
Heating is the larger measured load in Blaine, at 5,186 degree days versus 67 for cooling. Unlike a strongly continental record, however, its 24.8°F month-to-month range is compact; persistent cool-season demand matters more than a dramatic summer-to-winter reversal.
Blaine's frost-free season lasts about 218 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 24.8°F band across the normal year. July and December mark the typical warm and cold ends of the calendar. The annual average is 51°F. Monthly rows still matter, but they refine a steady profile rather than reveal two climatic extremes.
Blaine's 41.8 inches of annual precipitation falls in PlainClimate's middle band, so “wet” or “dry” is not the leading description. Annual snowfall totals 9.3 inches. Temperature balance and the calendar distribution carry more information than the annual moisture label alone.
These labels group NOAA 1991-2020 normals from Blaine'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 Blaine, not an official NOAA class or a year-ahead forecast.
Questions about Blaine's climate
How much rain does Blaine get? ▼
How much energy does heating and cooling require in Blaine? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Blaine's primary station: BLAINE (USC00450729). 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 5306505). Match rule for Blaine: 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 Blaine 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.