Climate and monthly weather forecast
Lummi Island, WA

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Weather in January

January in Lummi Island, Washington, is a frosty winter month, with temperature in the range of an average high of 43.3°F (6.3°C) and an average low of 36°F (2.2°C). January observes an average high-temperature of a chilly 43.3°F (6.3°C), marking an insignificant difference from December's 41.9°F (5.5°C). Weather in January »

Weather in February

The last month of the winter, February, is also a frosty month in Lummi Island, Washington, with an average temperature fluctuating between 44.2°F (6.8°C) and 35.2°F (1.8°C). Lummi Island starts February with an average high-temperature of a still frosty 44.2°F (6.8°C), a minor shift from January's 43.3°F (6.3°C). Weather in February »

Weather in March

The first month of the spring, March, is also a frosty month in Lummi Island, Washington, with an average temperature varying between 48.7°F (9.3°C) and 38.3°F (3.5°C). Lummi Island's entry into March measures an average high-temperature of a still chilly 48.7°F (9.3°C), closely parallel to the preceding month. Weather in March »

Weather in April

April is a cool spring month in Lummi Island, Washington, with an average temperature ranging between max 54.1°F (12.3°C) and min 41°F (5°C). The onset of April brings a minor temperature shift, with the average high-temperature moving from a frosty 48.7°F (9.3°C) in March to a cool 54.1°F (12.3°C). Weather in April »

Weather in May

May, the last month of the spring in Lummi Island, is an enjoyable month, with an average temperature fluctuating between 45.7°F (7.6°C) and 61.5°F (16.4°C). May's onset witnesses a minor shift in the average high-temperature, moving from a cool 54.1°F (12.3°C) in April to a refreshing 61.5°F (16.4°C). Weather in May »

Weather in June

June, the first month of the summer in Lummi Island, is still a refreshing month, with an average temperature fluctuating between 48.9°F (9.4°C) and 65.5°F (18.6°C). The initiation of June sees an average high-temperature of a still enjoyable 65.5°F (18.6°C), showing minor variations from the previous month. Weather in June »

Weather in July

July in Lummi Island, Washington, is an agreeable summer month, with an average temperature varying between 52.5°F (11.4°C) and 70.5°F (21.4°C). July's presence marks an average high-temperature of an agreeable 70.5°F (21.4°C), subtly varied from June's 65.5°F (18.6°C). Weather in July »

Weather in August

August, the last month of the summer in Lummi Island, is another pleasant month, with an average temperature varying between 53.8°F (12.1°C) and 71.1°F (21.7°C). August is the warmest month, with the temperature often reaching an average high of 71.1°F (21.7°C) and an average low of 53.8°F (12.1°C). Weather in August »

Weather in September

The first month of the autumn, September, is also an enjoyable month in Lummi Island, Washington, with temperature in the range of an average high of 65.3°F (18.5°C) and an average low of 50.9°F (10.5°C). The beginning of September brings a slight decrease in the average high-temperature, transitioning from a pleasant 71.1°F (21.7°C) in August to a refreshing 65.3°F (18.5°C). Weather in September »

Weather in October

October, the same as September, in Lummi Island, Washington, is another mild autumn month, with an average temperature varying between 45.5°F (7.5°C) and 56.5°F (13.6°C). Lummi Island's October weather features a light decline in high-temperatures, reducing from a comfortable 65.3°F (18.5°C) in September to a still refreshing 56.5°F (13.6°C). Weather in October »

Weather in November

The last month of the autumn, November, is another chilly month in Lummi Island, Washington, with an average temperature fluctuating between 47.7°F (8.7°C) and 39.9°F (4.4°C). A mild shift in the average high-temperature occurs in November, reducing from a refreshing 56.5°F (13.6°C) in October to a chilly 47.7°F (8.7°C). Weather in November »

Weather in December

December, the first month of the winter in Lummi Island, is also a wintry month, with an average temperature ranging between max 41.9°F (5.5°C) and min 35.4°F (1.9°C). In Lummi Island, the lowest average temperatures are observed in December, with a high of 41.9°F (5.5°C) and a low of 35.4°F (1.9°C). Weather in December »
Updated: Feb 14, 2024 | Published by: Weather U.S. | About Us / Weather Forecasting / Data Sources

Frequently asked questions

What is the most humid month in Lummi Island?

The most humid month is January, with an average relative humidity of 84%.

How many days does it rain in Lummi Island?

Throughout the year, in Lummi Island, there are 178.6 rainfall days, and 37.32" (948mm) of precipitation is accumulated.

When does it snow in Lummi Island?

January through April, November and December are months with snowfall.

How much does it snow in Lummi Island?

Throughout the year, in Lummi Island, Washington, there are 10.7 snowfall days, and 6.57" (167mm) of snow is accumulated.

What is the month with the least sunshine in Lummi Island?

The months with the least sunshine are January and December, with an average of 4.2h of sunshine.

What is the month with the lowest UV index in Lummi Island?

The months with the lowest UV index in Lummi Island are January, February, November and December, with an average maximum UV index of 2.

When does it snow the most in Lummi Island?

The month with the most snowfall is February, when snow falls for 3.8 days and typically aggregates up to 2.56" (65mm) of snow.

When is Daylight Saving Time (DST) in Lummi Island?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from PST to PDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from PDT to PST.

When it does not snow in Lummi Island?

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

When are the longest days in Lummi Island?

The month with the longest days is June, with an average of 16h and 6min of daylight.

What is the month with the highest UV index in Lummi Island?

The months with the highest UV index in Lummi Island are June and July, with an average maximum UV index of 5.

What is the least humid month in Lummi Island?

With an average relative humidity of 74%, July is the least humid month.

What is the driest month in Lummi Island?

July is the month with the least rainfall in Lummi Island, Washington. Rain falls for 7.8 days and accumulates 0.67" (17mm) of precipitation.

What is the month with the most sunshine in Lummi Island?

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

What month is the hottest in Lummi Island?

August, with its average high-temperature of 71.1°F (21.7°C) and an average low-temperature of 53.8°F (12.1°C), holds the record as the warmest month in Lummi Island.

What is the wettest month in Lummi Island?

The month with the most rainfall in Lummi Island is November, when the rain falls for 20.1 days and typically aggregates up to 5.71" (145mm) of precipitation.

What are the coldest months in Lummi Island?

With its average high temperature of 41.9°F (5.5°C) and a low of 35.4°F (1.9°C), December is regarded as the coldest month in Lummi Island.

What is the month with the shortest days in Lummi Island?

With an average of 8h and 24min of daylight, December has the shortest days of the year in Lummi Island, Washington.

Average temperature
Lummi Island, WA

Average temperature - Lummi Island, WA

The warmest month (with the highest average high temperature) is August (71.1°F).
The month with the lowest average high temperature is December (41.9°F).

The month with the highest average low temperature is August (53.8°F).
The coldest month (with the lowest average low temperature) is February (35.2°F).

Average pressure
Lummi Island, WA

Average pressure - Lummi Island, WA

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

Average wind speed
Lummi Island, WA

Average wind speed - Lummi Island, WA

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).

Average humidity
Lummi Island, WA

Average humidity - Lummi Island, WA

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

Average rainfall
Lummi Island, WA

Average rainfall - Lummi Island, WA

The wettest month (with the highest rainfall) is November (5.71").
The driest month (with the least rainfall) is July (0.67").

Average rainfall days
Lummi Island, WA

Average rainfall days - Lummi Island, WA

The month with the highest number of rainy days is November (20.1 days).
The month with the least rainy days is August (7.3 days).

Average snowfall
Lummi Island, WA

Average snowfall - Lummi Island, WA

The month with the highest snowfall is February (2.56").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days
Lummi Island, WA

Average snowfall days - Lummi Island, WA

The month with the highest number of snowfall days is February (3.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight / Average sunshine
Lummi Island, WA

Average daylight / Average sunshine - Lummi Island, WA

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 24min).

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).

Average sunshine days
Lummi Island, WA

Average sunshine days - Lummi Island, WA

The month with the most sunshine days is August (21.9 days).
The month with the least sunshine days is November (8.5 days).

Average UV index
Lummi Island, WA

Average UV index - Lummi Island, WA

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

Average visibility
Lummi Island, WA

Average visibility - Lummi Island, WA

The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).

Lummi Island, Washington, USA

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