August weather forecast
Bellingham, WA

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Scenic landscape of hills and the sea in this small town in Bellingham, Washington
Scenic landscape of hills and the sea in this small town in Bellingham, Washington

Weather in August

August continues the warm and sunny trend set by July, with high temperatures, low cloud cover, and almost negligible snowfall. With daylight persistence, Bellingham witnesses a sea temperature peak in this month. Humidity starts to rise again, causing a slight disruption in the notably dry and sunny weather pattern. Rainfall measures marginally higher than July, tapping at 0.71" (18mm). The late summer in Bellingham is characterized by warm days and cool evenings, beautifully capturing the transition into autumn.

Temperature

The highest point of temperatures in Bellingham falls in July and August, when the average high-temperature ascends to 70.3°F (21.3°C).

Humidity

In August, the average relative humidity in Bellingham is 76%.

Rainfall

In August, in Bellingham, the rain falls for 7.1 days. Throughout August, 0.71" (18mm) of precipitation is accumulated. In Bellingham, Washington, during the entire year, the rain falls for 158 days and collects up to 18.7" (475mm) of precipitation.

Snowfall

In Bellingham, snow does not fall in May through October.

Ocean temperature

August is the month with the warmest seawater, with an average ocean temperature of 53.2°F (11.8°C).
Note: If planning to swim in 53.2°F (11.8°C) under 50°F (10°C), wear a protective suit. Neglecting this advice might cause immediate cold shock and troubled breathing. A splash around 55.4°F (13°C) is not much warmer.

Daylight

The average length of the day in August in Bellingham is 14h and 17min.
On the first day of August in Bellingham, sunrise is at 5:44 am and sunset at 8:47 pm. On the last day of the month, sunrise is at 6:26 am and sunset at 7:53 pm PDT.

Sunshine

The months with the most sunshine are July and August, with an average of 10.5h of sunshine.

UV index

In Bellingham, the average daily maximum UV index in August is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for average individuals.
Note: In August, the maximum UV index of 4 translates into these guidelines:
Take necessary precautions - Defending against sun damage is advocated. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
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Frequently asked questions

What part of the year is the hottest in Bellingham?

July and August in Bellingham, Washington, are characterised by peak temperatures, with an average high of 70.3°F (21.3°C).

What is the average August temperature in Bellingham?

August temperatures in Bellingham, Washington, vary between a high-temperature of 70.3°F (21.3°C) and a low-temperature of 53.2°F (11.8°C).

What is the average humidity in August in Bellingham?

In August, the average relative humidity is 76%.

How many days does it rain in August in Bellingham?

In Bellingham, in August, it is raining for 7.1 days, with typically 0.71" (18mm) of accumulated precipitation.

When it does not snow in Bellingham?

In Bellingham, Washington, snow does not fall in May through October.

What month is the ocean warmest in Bellingham?

August is the month with the warmest seawater in Bellingham, Washington, with an average ocean temperature of 53.2°F (11.8°C).

What is the water temperature in August in Bellingham?

In August, the average ocean temperature in Bellingham, Washington, is 53.2°F (11.8°C). Swimming in 53.2°F (11.8°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.

What is the average length of the day in August in Bellingham?

In Bellingham, Washington, the average day length in August is 14h and 17min.

When are sunrise and sunset in August in Bellingham?

On the first day of August, sunrise is at 5:44 am and sunset at 8:47 pm. On the last day of the month, sunrise is at 6:26 am and sunset at 7:53 pm PDT.

What is the month with the most sunshine in Bellingham?

July and August, with an average of 10.5h of sunshine, are months with the most sunshine in Bellingham.

How long on average sun shines in August in Bellingham?

In Bellingham, Washington, the average sunshine duration in August is 10.5h.

How high is the UV index in August in Bellingham?

In Bellingham, the average daily maximum UV index in August is 4. A UV Index value of 3 to 5 symbolizes a medium hazard to health from unprotected exposure to UV radiation.
Today
Tomorrow
Long-term
YearJFMAMJJAugustSOND
Jul
August
Sep
Average high temperature
70.3°F 21.3°C
70.3°F 21.3°C
65.1°F 18.4°C
Average low temperature
52.2°F 11.2°C
53.2°F 11.8°C
50.7°F 10.4°C
Average pressure
30.03" 763mmHg
30.01" 762mmHg
30.01" 762mmHg
Average wind speed
4mph 6.4km/h
3.7mph 6km/h
4mph 6.4km/h
Average max. wind speed
4.5mph 7.2km/h
4.2mph 6.8km/h
4.2mph 6.8km/h
Average wind speed gusts
6.5mph 10.5km/h
6.1mph 9.8km/h
6.8mph 10.9km/h
Average humidity
74%
76%
79%
Average rainfall
0.55" 14mm
0.71" 18mm
1.57" 40mm
Average rainfall days
7.7
7.1
12.3
Average snowfall
0" 0mm
0" 0mm
0" 0mm
Average snowfall days
0
0
0
Average sea temperature
50.4°F 10.2°C
53.2°F 11.8°C
52.9°F 11.6°C
Average daylight
15h 4min
14h 2min
12h 4min
Average sunshine
10h 3min
10h 3min
9h 2min
Average sunshine days
22.3
21.8
16.1
Average UV index
5
4
3
Average cloud cover
27%
25%
33%
Average visibility
6mi 9.7km
6mi 9.7km
6mi 9.7km

Average temperature in August
Bellingham, WA

Average temperature in August - Bellingham, WA
  • Average high temperature in August: 70.3°F

The warmest months (with the highest average high temperature) are July and August (70.3°F).
The month with the lowest average high temperature is December (41.9°F).

  • Average low temperature in August: 53.2°F

The month with the highest average low temperature is August (53.2°F).
The coldest month (with the lowest average low temperature) is December (34.9°F).

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Average pressure in August
Bellingham, WA

Average pressure in August - Bellingham, WA
  • Average pressure in August: 30.01"Hg

The month with the highest atmospheric pressure is January (30.08"Hg).
The month with the lowest atmospheric pressure is March (30"Hg).

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Average wind speed in August
Bellingham, WA

Average wind speed in August - Bellingham, WA
  • Average wind speed in August: 3.7mph

The windiest month (with the highest average wind speed) is November (6.2mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).

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Average humidity in August
Bellingham, WA

Average humidity in August - Bellingham, WA
  • Average humidity in August: 76%

The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is July (74%).

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Average rainfall in August
Bellingham, WA

Average rainfall in August - Bellingham, WA
  • Average rainfall in August: 0.71"

The wettest month (with the highest rainfall) is November (2.64").
The driest month (with the least rainfall) is July (0.55").

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Average rainfall days in August
Bellingham, WA

Average rainfall days in August - Bellingham, WA
  • Average rainfall days in August: 7.1 days

The month with the highest number of rainy days is March (17.3 days).
The month with the least rainy days is August (7.1 days).

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Average snowfall in August
Bellingham, WA

Average snowfall in August - Bellingham, WA
  • Average snowfall in August: 0"

The month with the highest snowfall is February (1.81").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in August
Bellingham, WA

Average snowfall days in August - Bellingham, WA
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is February (3.4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average sea temperature in August
Bellingham, WA

Average sea temperature in August - Bellingham, WA
  • Average sea temperature in August: 53.2°F

The best month for swimming (with the highest average sea temperature) is August (53.2°F).
The coldest month (with the lowest average sea temperature) is February (44.5°F).

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Average daylight in August /
Average sunshine in August
Bellingham, WA

Average daylight in August / Average sunshine in August - Bellingham, WA
  • Average daylight in August: 14h and 2min

The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 18min).

  • Average sunshine in August: 10h and 3min

The months with the most sunshine are July and August (Average sunshine: 10h and 30min).
The months with the least sunshine are January and December (Average sunshine: 4h and 12min).

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Average sunshine days in August
Bellingham, WA

Average sunshine days in August - Bellingham, WA
  • Average sunshine days in August: 21.8 days

The month with the most sunshine days is July (22.3 days).
The month with the least sunshine days is April (10.8 days).

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Average UV index in August
Bellingham, WA

Average UV index in August - Bellingham, WA
  • Average UV index in August: 4

The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in August
Bellingham, WA

Average cloud cover in August - Bellingham, WA
  • Average cloud cover in August: 25

The months with the most cloud cover are January and December (Cloud cover 56).
The month with the least cloud cover is August (Cloud cover 25).

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Average visibility in August
Bellingham, WA

Average visibility in August - Bellingham, WA
  • Average visibility in August: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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Bellingham, Washington, USA

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