May weather forecast
Snoqualmie Pass, WA

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Weather in May

May in Snoqualmie Pass marks a noticeable departure from the colder months as spring gets into full swing. The weather shift is evident where nature comes alive, and outdoor activities gain traction. As temperatures rise, the snowfall finally takes a back seat, replaced by rainfall. The air begins to dry out, providing a much-needed respite from the humid winters. The residents finally bid adieu to winter and welcome the blossoming spring color that adorned Snoqualmie.

Temperature

The onset of May in Snoqualmie Pass, Washington, brings a temperature shift, with the average high-temperature moving from a chilly 43.7°F (6.5°C) in April to a fresh 54.7°F (12.6°C). Throughout May, Snoqualmie Pass anticipates an average low-temperature of 36.1°F (2.3°C).

Humidity

The average relative humidity in May is 80%.

Rainfall

In Snoqualmie Pass, in May, it is raining for 15.7 days, with typically 1.93" (49mm) of accumulated precipitation. Throughout the year, there are 127.9 rainfall days, and 28.58" (726mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Snoqualmie Pass are January through June, September through December. In Snoqualmie Pass, Washington, in May, during 6.4 snowfall days, 2.8" (71mm) of snow is typically accumulated. In Snoqualmie Pass, during the entire year, snow falls for 135.3 days and aggregates up to 134.33" (3412mm) of snow.

Daylight

The average length of the day in May is 15h and 8min.
On the first day of May in Snoqualmie Pass, sunrise is at 5:47 am and sunset at 8:17 pm. On the last day of the month, sunrise is at 5:12 am and sunset at 8:54 pm PDT.

Sunshine

The average sunshine in May in Snoqualmie Pass is 8.4h.

UV index

In May, the average daily maximum UV index in Snoqualmie Pass is 3. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In May, a daily maximum UV index of 3 leads to the following instructions:
Put precautions into practice - Ensuring skin and eye safety is a necessity. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
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Frequently asked questions

What is the temperature in May in Snoqualmie Pass?

During May, Snoqualmie Pass experiences an average high-temperature of 54.7°F (12.6°C) and a low-temperature of 36.1°F (2.3°C).

What is the average humidity in May in Snoqualmie Pass?

In Snoqualmie Pass, Washington, the average relative humidity in May is 80%.

How many days does it rain in May in Snoqualmie Pass?

In Snoqualmie Pass, in May, during 15.7 rainfall days, 1.93" (49mm) of precipitation is typically accumulated.

How much does it snow in Snoqualmie Pass in May?

In Snoqualmie Pass, in May, snow falls for 6.4 days, with typically accumulated 2.8" (71mm) of snow.

How many hours of daylight does Snoqualmie Pass have in May?

The average day length in May in Snoqualmie Pass is 15h and 8min.

When are sunrise and sunset in May in Snoqualmie Pass?

In May, on the first day of the month, sunrise is at 5:47 am and sunset at 8:17 pm. On the last day of the month, sunrise is at 5:12 am and sunset at 8:54 pm PDT.

How long on average sun shines in May in Snoqualmie Pass?

In Snoqualmie Pass, Washington, the average sunshine duration in May is 8.4h.

What is the UV index intensity in May in Snoqualmie Pass?

In Snoqualmie Pass, Washington, the average daily maximum UV index in May is 3. A UV Index of 3 to 5 symbolizes a moderate health threat from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Snoqualmie Pass, WA

Average temperature in May - Snoqualmie Pass, WA
  • Average high temperature in May: 54.7°F

The warmest month (with the highest average high temperature) is August (71.2°F).
The month with the lowest average high temperature is December (30.2°F).

  • Average low temperature in May: 36.1°F

The month with the highest average low temperature is August (45°F).
The coldest month (with the lowest average low temperature) is December (20.3°F).

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Average pressure in May
Snoqualmie Pass, WA

Average pressure in May - Snoqualmie Pass, WA
  • Average pressure in May: 29.99"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is August (29.97"Hg).

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Average wind speed in May
Snoqualmie Pass, WA

Average wind speed in May - Snoqualmie Pass, WA
  • Average wind speed in May: 4.4mph

The windiest month (with the highest average wind speed) is January (5mph).
The calmest month (with the lowest average wind speed) is September (3.9mph).

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Average humidity in May
Snoqualmie Pass, WA

Average humidity in May - Snoqualmie Pass, WA
  • Average humidity in May: 80%

The months with the highest relative humidity are January and February (93%).
The month with the lowest relative humidity is July (69%).

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Average rainfall in May
Snoqualmie Pass, WA

Average rainfall in May - Snoqualmie Pass, WA
  • Average rainfall in May: 1.93"

The wettest month (with the highest rainfall) is January (4.21").
The driest month (with the least rainfall) is July (0.51").

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Average rainfall days in May
Snoqualmie Pass, WA

Average rainfall days in May - Snoqualmie Pass, WA
  • Average rainfall days in May: 15.7 days

The month with the highest number of rainy days is May (15.7 days).
The month with the least rainy days is January (6.8 days).

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Average snowfall in May
Snoqualmie Pass, WA

Average snowfall in May - Snoqualmie Pass, WA
  • Average snowfall in May: 2.8"

The month with the highest snowfall is January (27.72").
The months with the least snowfall are July and August (0").

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Average snowfall days in May
Snoqualmie Pass, WA

Average snowfall days in May - Snoqualmie Pass, WA
  • Average snowfall days in May: 6.4 days

The month with the highest number of snowfall days is December (22.3 days).
The months with the least snowfall days are July and August (0 days).

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Average daylight in May /
Average sunshine in May
Snoqualmie Pass, WA

Average daylight in May / Average sunshine in May - Snoqualmie Pass, WA
  • Average daylight in May: 15h and 1min

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).

  • Average sunshine in May: 8h and 2min

The month with the most sunshine is August (Average sunshine: 10h and 54min).
The months with the least sunshine are January and February (Average sunshine: 3h and 0min).

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Average sunshine days in May
Snoqualmie Pass, WA

Average sunshine days in May - Snoqualmie Pass, WA
  • Average sunshine days in May: 10.3 days

The month with the most sunshine days is August (20.2 days).
The month with the least sunshine days is February (6 days).

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Average UV index in May
Snoqualmie Pass, WA

Average UV index in May - Snoqualmie Pass, WA
  • Average UV index in May: 3

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 1).

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Average cloud cover in May
Snoqualmie Pass, WA

Average cloud cover in May - Snoqualmie Pass, WA
  • Average cloud cover in May: 53

The month with the most cloud cover is February (Cloud cover 72).
The month with the least cloud cover is August (Cloud cover 30).

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Average visibility in May
Snoqualmie Pass, WA

Average visibility in May - Snoqualmie Pass, WA
  • Average visibility in May: 4mi

The months with the highest visibility are June, July and August (5mi).
The months with the lowest visibility are January, February, March and December (3mi).

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Snoqualmie Pass, Washington, USA

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