Climate and monthly weather forecast
West Lake Sammamish, WA

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Weather in January

January in West Lake Sammamish, Washington, is a chilly winter month, with an average temperature ranging between max 44.1°F (6.7°C) and min 34.3°F (1.3°C). An average high-temperature of a chilly 44.1°F (6.7°C) marks January, exhibiting a close resemblance to the conditions in December. Weather in January »

Weather in February

February, the last month of the winter in West Lake Sammamish, is another chilly month, with an average temperature fluctuating between 45.1°F (7.3°C) and 34°F (1.1°C). February's arrival brings an average high-temperature of a still chilly 45.1°F (7.3°C), slightly deviating from January's 44.1°F (6.7°C). Weather in February »

Weather in March

March, the first month of the spring in West Lake Sammamish, is a fresh month, with an average temperature varying between 50°F (10°C) and 36.1°F (2.3°C). The advent of March signifies a minor shift to an average high-temperature of a cool 50°F (10°C), aligning closely with February. Weather in March »

Weather in April

April is a moderate spring month in West Lake Sammamish, Washington, with an average temperature fluctuating between 55.8°F (13.2°C) and 38.8°F (3.8°C). The transition from March to April brings a subtle temperature rise, with average high-temperatures increasing from a fresh 50°F (10°C) to a refreshing 55.8°F (13.2°C). Weather in April »

Weather in May

The last month of the spring, May, is a comfortable month in West Lake Sammamish, Washington, with an average temperature varying between 42.6°F (5.9°C) and 64.4°F (18°C). West Lake Sammamish's weather shows a minor temperature rise with the arrival of May, moving from 55.8°F (13.2°C) in April to a still refreshing 64.4°F (18°C). Weather in May »

Weather in June

The first month of the summer, June, is a pleasant month in West Lake Sammamish, Washington, with temperature in the range of an average high of 69.3°F (20.7°C) and an average low of 46.4°F (8°C). With the transition into June, West Lake Sammamish notes an average high-temperature of a pleasant 69.3°F (20.7°C), closely resembling May. Weather in June »

Weather in July

July is a warm summer month in West Lake Sammamish, Washington, with an average temperature varying between 50.7°F (10.4°C) and 76.1°F (24.5°C). Observing a minor shift, the average high-temperature during July adjusts from June's pleasant 69.3°F (20.7°C) to a moderately hot 76.1°F (24.5°C). Weather in July »

Weather in August

The last month of the summer, August, is also a moderately hot month in West Lake Sammamish, Washington, with an average temperature varying between 76.5°F (24.7°C) and 52.2°F (11.2°C). West Lake Sammamish's temperatures peak on average in August, reaching 76.5°F (24.7°C) at their highest and 52.2°F (11.2°C) at their lowest. Weather in August »

Weather in September

The first month of the autumn, September, is also an agreeable month in West Lake Sammamish, Washington, with an average temperature varying between 48.9°F (9.4°C) and 69.8°F (21°C). With the arrival of September, West Lake Sammamish experiences a modest decline in average high-temperatures, transitioning from a moderately hot 76.5°F (24.7°C) in August to an agreeable 69.8°F (21°C). Weather in September »

Weather in October

October, like September, is another mild autumn month in West Lake Sammamish, Washington, with an average temperature fluctuating between 43.7°F (6.5°C) and 58.5°F (14.7°C). A decrease in the average high-temperature is observed during October, shifting from an agreeable 69.8°F (21°C) in September to a refreshing 58.5°F (14.7°C). Weather in October »

Weather in November

November, the last month of the autumn in West Lake Sammamish, is also a frosty month, with an average temperature ranging between min 38.3°F (3.5°C) and max 48.2°F (9°C). A shift in the average high-temperature occurs in November, reducing from a mild 58.5°F (14.7°C) in October to a frosty 48.2°F (9°C). Weather in November »

Weather in December

December, the first month of the winter in West Lake Sammamish, is also a wintry month, with temperature in the range of an average low of 33.6°F (0.9°C) and an average high of 42.3°F (5.7°C). The coldest time of the year is December, with temperatures averaging a high of 42.3°F (5.7°C) and a low of 33.6°F (0.9°C). Weather in December »
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Frequently asked questions

What is the most humid month in West Lake Sammamish?

The months with the highest humidity are January, February and December, with an average relative humidity of 85%.

How many days does it rain in West Lake Sammamish?

Throughout the year, in West Lake Sammamish, Washington, there are 136.7 rainfall days, and 13.39" (340mm) of precipitation is accumulated.

When does it snow in West Lake Sammamish?

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

How many days does it snow in West Lake Sammamish?

In West Lake Sammamish, Washington, during the entire year, snow falls for 9.3 days and aggregates up to 3.27" (83mm) of snow.

What are the months with the least sunshine in West Lake Sammamish?

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

When is the lowest UV index in West Lake Sammamish?

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

When does it snow the most in West Lake Sammamish?

February is the month with the most snowfall in West Lake Sammamish, Washington. Snow falls for 3.2 days and accumulates 1.38" (35mm) of snow.

When is Daylight Saving Time (DST) in West Lake Sammamish?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in West Lake Sammamish, Washington, 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 West Lake Sammamish?

In West Lake Sammamish, Washington, snow does not fall in May through October.

When are the longest days in West Lake Sammamish?

The month with the longest days in West Lake Sammamish, Washington, is June, with an average of 15h and 54min of daylight.

When is the highest UV index in West Lake Sammamish?

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

What is the least humid month in West Lake Sammamish?

July is the least humid month, with an average relative humidity of 70%.

What is the driest month in West Lake Sammamish?

July and August are months with the least rain in West Lake Sammamish when the rain falls for 6.7 days and typically aggregates up to 0.35" (9mm) of rain.

What month is the hottest in West Lake Sammamish?

August, characterized by an average high temperature of 76.5°F (24.7°C) and a low temperature of 52.2°F (11.2°C), is generally the warmest month in West Lake Sammamish, Washington.

What month has the most sunshine in West Lake Sammamish?

The month with the most sunshine in West Lake Sammamish is August, with an average of 10.7h of sunshine.

What time of the year is the coldest in West Lake Sammamish?

December, known for its average high temperature of 42.3°F (5.7°C) and an average low temperature of 33.6°F (0.9°C), is the coldest month.

What is the wettest month in West Lake Sammamish?

The month with the most rainfall in West Lake Sammamish is December, when the rain falls for 14.1 days and typically aggregates up to 1.85" (47mm) of precipitation.

What is the month with the shortest days in West Lake Sammamish?

With an average of 8h and 30min of daylight, December has the shortest days of the year in West Lake Sammamish, Washington.

Average temperature
West Lake Sammamish, WA

Average temperature - West Lake Sammamish, WA

The warmest month (with the highest average high temperature) is August (76.5°F).
The month with the lowest average high temperature is December (42.3°F).

The month with the highest average low temperature is August (52.2°F).
The coldest month (with the lowest average low temperature) is December (33.6°F).

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Average pressure
West Lake Sammamish, WA

Average pressure - West Lake Sammamish, WA

The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).

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Average wind speed
West Lake Sammamish, WA

Average wind speed - West Lake Sammamish, WA

The windiest month (with the highest average wind speed) is January (5mph).
The calmest month (with the lowest average wind speed) is August (3.4mph).

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Average humidity
West Lake Sammamish, WA

Average humidity - West Lake Sammamish, WA

The months with the highest relative humidity are January, February and December (85%).
The month with the lowest relative humidity is July (70%).

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Average rainfall
West Lake Sammamish, WA

Average rainfall - West Lake Sammamish, WA

The wettest month (with the highest rainfall) is December (1.85").
The driest months (with the least rainfall) are July and August (0.35").

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Average rainfall days
West Lake Sammamish, WA

Average rainfall days - West Lake Sammamish, WA

The month with the highest number of rainy days is March (14.8 days).
The month with the least rainy days is August (5.2 days).

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Average snowfall
West Lake Sammamish, WA

Average snowfall - West Lake Sammamish, WA

The month with the highest snowfall is February (1.38").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days
West Lake Sammamish, WA

Average snowfall days - West Lake Sammamish, WA

The month with the highest number of snowfall days is February (3.2 days).
The months with the least snowfall days are May, June, July, August and October (0 days).

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Average daylight / Average sunshine
West Lake Sammamish, WA

Average daylight / Average sunshine - West Lake Sammamish, WA

The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).

The month with the most sunshine is August (Average sunshine: 10h and 42min).
The months with the least sunshine are January and December (Average sunshine: 4h and 12min).

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Average sunshine days
West Lake Sammamish, WA

Average sunshine days - West Lake Sammamish, WA

The month with the most sunshine days is August (24 days).
The month with the least sunshine days is November (13.5 days).

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Average UV index
West Lake Sammamish, WA

Average UV index - West Lake Sammamish, 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).

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Average visibility
West Lake Sammamish, WA

Average visibility - West Lake Sammamish, WA

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

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West Lake Sammamish, Washington, USA

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