Bellingham in Summer
In summer (June, July and August), Bellingham sees average daytime highs around 65°F and overnight lows near 56°F, with 5.6 in of rain over about 20 wet days across the season. It is the warmest season of the year and the driest season of the year.
Over the season highs climb from about 60°F in early June to 66°F by late August. The sky is clear or mostly clear about 42% of the time across summer, and the air most often feels dry.
Summer is Bellingham's best season of the year to visit on our travel score. For the whole year in context, see Bellingham's year-round climate.
- Avg daytime high
- 65°F
- warmest season of the year
- Avg overnight low
- 56°F
- Rainfall
- 5.6 in
- 20 wet days
- Avg wind
- 5 mph
- Travel score
- 6.5
- best season of the year
- Months
- Jun · Jul · Aug
Temperature in Bellingham in Summer
Over the season highs climb from about 60°F in early June to 66°F by late August.
A typical summer day in Bellingham reaches about 65°F and drops to 56°F overnight. The warmest of the three months is August, the coolest June.
How summer really feels in Bellingham
Once humidity and wind are folded in, summer brings about 0 days that feel above 90°F and 0 that feel at or below 32°F.
summer sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Bellingham weather by month
How the three summer months (June, July and August) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°F) | Rainfall (inches) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 44° / 38° | 8.4 | 18.6 | 3.2 | 8.5 | 0.6 |
| Feb | 46° / 38° | 5.4 | 15.3 | 2.8 | 9.8 | 1.0 |
| Mar | 49° / 40° | 6.7 | 18.9 | 1.9 | 11.6 | 1.5 |
| Apr | 53° / 43° | 4.8 | 15.2 | 0.1 | 13.4 | 2.5 |
| May | 57° / 48° | 3.4 | 11.3 | 0 | 15 | 4.0 |
| Jun | 61° / 53° | 2.5 | 9.4 | 0 | 15.9 | 5.2 |
| Jul | 66° / 57° | 1.3 | 5.1 | 0 | 15.5 | 7.1 |
| Aug | 67° / 58° | 1.8 | 5.3 | 0 | 14.2 | 7.2 |
| Sep | 64° / 54° | 3.2 | 9.1 | 0 | 12.4 | 5.9 |
| Oct | 56° / 48° | 6.4 | 14.7 | 0 | 10.5 | 3.3 |
| Nov | 48° / 41° | 9.5 | 18.8 | 1.1 | 9 | 1.4 |
| Dec | 44° / 38° | 8.1 | 18.3 | 3.3 | 8.1 | 0.5 |
Cloud cover in Summer
The sky is clear or mostly clear about 42% of the time across summer.
Chance of precipitation in Summer
Bellingham gets around 5.6 in of rain over 20 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 5 mph across summer.
Sunrise & sunset in Summer
Daylight runs from about 15 h 36 min in early June to 13 h 18 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 6.1 kWh/m².
Hazard calendar for Bellingham
None of Bellingham's seasonal hazards peak in summer. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do.
Bellingham's rainy season runs October–April, when most of the year's rain falls.
Is summer a good time to visit Bellingham?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is a reasonable time to visit Bellingham for sightseeing.
What to pack for Bellingham in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Bellingham sees daytime highs around 65°F and nights near 56°F. Pack sun protection. Worth having: a warm layer and rain gear. About 20 days see rain.
Sea temperature near Bellingham in Summer
The nearest coast averages about 59°F across summer — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 19 mi away) is warmest in August at about 60°F and coldest in January near 45°F.
The water stays below 68°F all year — cool enough that most swimmers want a wetsuit.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°F) | 45 | 45 | 46 | 49 | 53 | 56 | 59 | 60 | 57 | 52 | 49 | 46 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Cool | Cool | Bracing | Bracing | Bracing | Bracing |
| Sea temperature (°F) | Comfort | |
|---|---|---|
| Jan | 45 | Bracing |
| Feb | 45 | Bracing |
| Mar | 46 | Bracing |
| Apr | 49 | Bracing |
| May | 53 | Bracing |
| Jun | 56 | Bracing |
| Jul | 59 | Cool |
| Aug | 60 | Cool |
| Sep | 57 | Bracing |
| Oct | 52 | Bracing |
| Nov | 49 | Bracing |
| Dec | 46 | Bracing |
UV index in Bellingham in Summer
Clear-sky midday UV across summer averages around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Bellingham peaks around July 17 at about 8 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 17 at about 1 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 7 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 1 | 1 | 4 | 4 | 7 | 6 | 8 | 6 | 4 | 3 | 1 | 1 |
| Level | Low | Low | Moderate | Moderate | High | High | Very high | High | Moderate | Moderate | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 1 | Low |
| Feb | 1 | Low |
| Mar | 4 | Moderate |
| Apr | 4 | Moderate |
| May | 7 | High |
| Jun | 6 | High |
| Jul | 8 | Very high |
| Aug | 6 | High |
| Sep | 4 | Moderate |
| Oct | 3 | Moderate |
| Nov | 1 | Low |
| Dec | 1 | Low |
Air quality in Bellingham in Summer
Average fine-particle pollution (PM2.5) through the year — so you can see where summer falls, not just the annual average.
Air quality in Bellingham is worst in September — around 18 µg/m³ PM2.5 (moderate), about 3.2× the cleanest month (December, 6 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 7 | 9 | 12 | 12 | 12 | 11 | 11 | 18 | 18 | 12 | 7 | 6 |
| Level | Good | Good | Good | Good | Good | Good | Good | Moderate | Moderate | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 7 | Good |
| Feb | 9 | Good |
| Mar | 12 | Good |
| Apr | 12 | Good |
| May | 12 | Good |
| Jun | 11 | Good |
| Jul | 11 | Good |
| Aug | 18 | Moderate |
| Sep | 18 | Moderate |
| Oct | 12 | Good |
| Nov | 7 | Good |
| Dec | 6 | Good |
Where is Bellingham?
Bellingham sits at 48.8°N, 122.5°W, 69 ft above sea level, in United States. The nearest listed city is Anacortes, 18 mi away.
Topography around Bellingham
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Bellingham.
Within 2 miles, the terrain around Bellingham has only modest variations in elevation — a maximum elevation change of 666 ft around an average of 102 ft above sea level; within 10 miles, large variations in elevation — a maximum elevation change of 3,097 ft; within 50 miles, extreme variations in elevation — a maximum elevation change of 10,758 ft.
The land around Bellingham is covered by trees (39%), artificial surfaces (29%) and water (23%) within 2 miles, trees (49%) and water (26%) within 10 miles, and trees (51%) and water (32%) within 50 miles.
United States travel facts
- Power plugs
- Type A / B
- 120 V · 60 Hz
- Prices
- ≈ 100% of US
- price level, 2025
- GDP per capita
- $90,027
- 2025
- Happiness
- 6.8 / 10
- World Happiness, 2025
- Safe drinking water
- 98%
- of population, 2024
- Homicide rate
- 5.8
- per 100k, 2023
- Road deaths
- 12.7
- per 100k/yr, 2019
- Income group
- High
- World Bank
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Bellingham (48.7595°, -122.4882°, elevation 69 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.