Bellingham weather in April

In April, Bellingham sees average daytime highs of 53°F and overnight lows near 43°F, with 4.8 in of precipitation across 15.2 wet days and about 13.4 hours of daylight. It is the 7th-warmest and 7th-wettest month of the year here.

Highs climb over the month, from about 51°F in the first days to 55°F by the end. The sky is clear or mostly clear about 21% of the time in April, and the air most often feels dry.

Daylight stretches from about 12 h 30 min at the start of April to 14 h 12 min by month's end. Set against the rest of the year, April is Bellingham's 7th-clearest and 6th-windiest month. For the whole year in context, see Bellingham's year-round climate.

Daytime high
53°
7th warmest
Overnight low
43°
6th coldest
Precipitation
4.8 in
15.2 wet days
Daylight
13 h 24 min
5:27 AM – 6:53 PM
Cloud cover
68%
7th clearest
Wind
6 mph
6th windiest
Solar energy
4.57 kWh/m²
Travel score
2.5
out of 10

Bellingham is city in, and the county seat of, Whatcom County in the State of Washington, United States.

Density
1,084/km²
people per km²
Founded
1852

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 51°F in the first days to 55°F by the end.

A typical April day in Bellingham reaches about 53°F in the afternoon and slips back to 43°F overnight — a 9°F spread between the day's warmth and the night's chill. On most days the high lands between 47°F and 58°F. Set against its neighbours, April runs about 4°F warmer than March and about 5°F cooler than May.

30°40°50°60°70°151015202530
Avg high (°F)Avg low (°F)
15041
25041
35142
45142
55142
65142
75142
85142
95142
105142
115242
125243
135243
145243
155243
165343
175343
185344
195344
205344
215344
225444
235444
245444
255445
265445
275445
285545
295545
305545

How April really feels in Bellingham

Once humidity and wind are folded in, April averages 0 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F
0
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

April 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 April compares with the rest of the year at a glance. April is the 7th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan44° / 38°8.418.63.28.50.6
Feb46° / 38°5.415.32.89.81.0
Mar49° / 40°6.718.91.911.61.5
Apr53° / 43°4.815.20.113.42.5
May57° / 48°3.411.30154.0
Jun61° / 53°2.59.4015.95.2
Jul66° / 57°1.35.1015.57.1
Aug67° / 58°1.85.3014.27.2
Sep64° / 54°3.29.1012.45.9
Oct56° / 48°6.414.7010.53.3
Nov48° / 41°9.518.81.191.4
Dec44° / 38°8.118.33.38.10.5

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 21% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 15% of April, with mostly cloudy or overcast conditions the remaining 65%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13070
23169
33169
43070
53070
63070
73070
82971
93169
103169
113169
123367
133367
143367
153466
163664
173664
183763
193763
203763
213961
224060
234060
244060
254060
264159
274159
284159
294258
304258

Chance of precipitation in April

Any precipitationSnow

Bellingham gets around 4.8 in of rain and snow over 15.2 wet days in April. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 51% and peaks near 56% on the wettest days, and about 0 day brings snow. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)Snow chance (%)
1563
2562
3552
4552
5551
6551
7551
8551
9551
10550
11550
12540
13540
14530
15520
16520
17510
18500
19500
20490
21480
22470
23470
24460
25460
26450
27450
28440
29440
30430

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

Most of April feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, April lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)
1100
2100
3100
4100
5100
6100
7100
8100
9100
10100
11100
12100
13100
14100
15100
16100
17100
18100
19100
20100
21100
22100
23100
24100
25100
26100
27100
28100
29100
30100

Wind in April

Winds average 6 mph in April.

Across April, daily wind ranges from about 5 mph on the calmest days to 6 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (mph)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
285calm
295calm
305calm

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 30 min at the start of April to 14 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 102 minutes over April. Sunrise moves from 5:59 AM to 5:00 AM, and sunset from 6:31 PM to 7:14 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.55:596:31
212.65:566:32
312.75:546:34
412.75:526:35
512.85:506:37
612.85:486:38
712.95:466:40
813.05:446:41
913.05:416:43
1013.15:396:44
1113.15:376:46
1213.25:356:47
1313.35:336:49
1413.35:316:50
1513.45:296:52
1613.45:276:53
1713.55:256:55
1813.65:236:56
1913.65:216:58
2013.75:196:59
2113.75:177:01
2213.85:157:02
2313.85:137:04
2413.95:117:05
2514.05:097:07
2614.05:087:08
2714.15:067:10
2814.15:047:11
2914.25:027:13
3014.25:007:14

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 4.57 kWh/m².

For context, solar energy here swings from a low near 0.84 kWh/m² to a high of 6.56 kWh/m² in July across the year — April's 4.57 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
13.8Moderate
23.9Moderate
33.9Moderate
44.0Moderate
54.0Bright
64.1Bright
74.1Bright
84.2Bright
94.2Bright
104.3Bright
114.3Bright
124.4Bright
134.4Bright
144.5Bright
154.5Bright
164.6Bright
174.7Bright
184.7Bright
194.8Bright
204.8Bright
214.9Bright
224.9Bright
235.0Bright
245.0Bright
255.1Bright
265.1Bright
275.2Bright
285.2Bright
295.3Bright
305.3Bright
Planning a trip in April

Hazard calendar for Bellingham

In seasonPeak

In April, Bellingham sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Bellingham's rainy season runs October–April, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is April a good time to visit Bellingham?

Our two travel scores rate April for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

2.5
Sightseeing
7th-best month of the year
0.0
Beach & pool
7th-best month of the year

April is a weaker month for outdoor sightseeing in Bellingham.

What to pack for Bellingham in April

From April's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In April, Bellingham sees daytime highs around 53°F and nights near 43°F. Pack a warm layer and rain gear. Worth having: sun protection. About 15 days see rain.

a warm layerrain gearsun protection

Sea temperature near Bellingham in April

The nearest coast averages about 49°F in April — 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.

45°50°55°60°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°F)Comfort
Jan45Bracing
Feb45Bracing
Mar46Bracing
Apr49Bracing
May53Bracing
Jun56Bracing
Jul59Cool
Aug60Cool
Sep57Bracing
Oct52Bracing
Nov49Bracing
Dec46Bracing

UV index in Bellingham in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April peaks around 4 — 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJul 17UV 8Dec 17UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar4Moderate
Apr4Moderate
May7High
Jun6High
Jul8Very high
Aug6High
Sep4Moderate
Oct3Moderate
Nov1Low
Dec1Low

Air quality in Bellingham in April

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where April 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).

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1018 µg/m³Dec 176 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb9Good
Mar12Good
Apr12Good
May12Good
Jun11Good
Jul11Good
Aug18Moderate
Sep18Moderate
Oct12Good
Nov7Good
Dec6Good
Location & terrain

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.

2 miles
666 ft
10 miles
3,097 ft
50 miles
10,758 ft
treesgrasslandcroplandartificial surfacesbare terrainsnow and icewater
April weather nearby: Anacortes 18 mi · Townline 22 mi · White Rock 23 mi · Abbotsford 23 mi · South Surrey 24 mi · Mount Vernon 24 mi · Langley 25 mi · Cloverdale 27 mi

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
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 2%

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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).