May weather forecast and climate
Glacier, WA

Weather in May

The last month of the spring, May, is a mild month in Glacier, Washington, with average temperature varying between 58.6°F (14.8°C) and 39°F (3.9°C).

Temperature

In May, the average high-temperature increases, from a chilly 48.7°F (9.3°C) in April, to a moderate 58.6°F (14.8°C). In May, in Glacier, Washington, the average low-temperature is 39°F (3.9°C).

Humidity

In May, the average relative humidity is 80%.

Rainfall

In Glacier, during May, the rain falls for 17.4 days and regularly aggregates up to 3.86" (98mm) of precipitation. In Glacier, during the entire year, the rain falls for 194.4 days and collects up to 69.29" (1760mm) of precipitation.

Snowfall

Months with snowfall are January through May, October through December. May is the last month it regularly snows in Glacier. During 0.3 snowfall days, in May, Glacier aggregates 0.2" (5mm) of snow. In Glacier, during the entire year, snow falls for 51.2 days, and aggregates up to 83.11" (2111mm) of snow.

Daylight

In May, the average length of the day is 15.3h.

Sunshine

In May, the average sunshine in Glacier, Washington, is 7.8h.

UV index

In Glacier, the average daily maximum UV index is 3. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to the Sun's UV rays for average individuals.
Note: The average daily UV index of 3 in May transform into the following instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the average humidity in May in Glacier?

The average relative humidity in May is 80%.

How much does it rain in Glacier in May?

In May, in Glacier, the rain falls for 17.4 days. Throughout May, 3.86" (98mm) of precipitation is accumulated.

What is the last month it snows in Glacier?

May is the last month it regularly snows in Glacier. During 0.3 snowfall days, in May, Glacier aggregates 0.2" (5mm) of snow.

How many hours of daylight does Glacier have in May?

In May, the average length of the day in Glacier is 15.3h.

How many hours of sunshine does Glacier have in May?

The average sunshine in May in Glacier, Washington, is 7.8h.

What is the UV index reading in May in Glacier?

The average daily maximum UV index in May in Glacier is 3. A UV Index of 3 to 5 symbolizes a moderate vulnerability from the exposure to the Sun's UV rays.

Average temperature in May
Glacier, WA

Average temperature in May - Glacier, WA
  • Average high temperature in May: 58.6°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 (35.6°F).

  • Average low temperature in May: 39°F

The month with the highest average low temperature is August (46.9°F).
The coldest month (with the lowest average low temperature) is December (26.1°F).

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Average pressure in May
Glacier, WA

Average pressure in May - Glacier, WA
  • Average pressure in May: 30"

The month with the highest atmospheric pressure is January (30.1").
Months with the lowest atmospheric pressure are May, June, August and September (30").

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Average wind speed in May
Glacier, WA

Average wind speed in May - Glacier, WA
  • Average wind speed in May: 3.5mph

The windiest month (with the highest average wind speed) is January (4.6mph).
The calmest month (with the lowest average wind speed) is August (3.3mph).

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Average humidity in May
Glacier, WA

Average humidity in May - Glacier, WA
  • Average humidity in May: 80%

The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is July (74%).

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Average rainfall in May
Glacier, WA

Average rainfall in May - Glacier, WA
  • Average rainfall in May: 3.86"

The wettest month (with the highest rainfall) is January (10.39").
The driest month (with the least rainfall) is July (1.5").

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Average rainfall days in May
Glacier, WA

Average rainfall days in May - Glacier, WA
  • Average rainfall days in May: 17.4 days

The month with the highest number of rainy days is April (21.3 days).
The month with the least rainy days is August (10.3 days).

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Average snowfall in May
Glacier, WA

Average snowfall in May - Glacier, WA
  • Average snowfall in May: 0.2"

The month with the highest snowfall is February (22.36").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in May
Glacier, WA

Average snowfall days in May - Glacier, WA
  • Average snowfall days in May: 0.3 days

The month with the highest number of snowfall days is December (11.4 days).
Months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in May /
Average sunshine in May
Glacier, WA

Average daylight in May / Average sunshine in May - Glacier, WA
  • Average daylight in May: 15.3h

The month with the longest days is June (Average daylight: 16.1h).
The month with the shortest days is December (Average daylight: 8.3h).

  • Average sunshine in May: 7.8h

The month with the most sunshine is August (Average sunshine: 10h).
The month with the least sunshine is December (Average sunshine: 3.3h).

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Average sunshine days in May
Glacier, WA

Average sunshine days in May - Glacier, WA
  • Average sunshine days in May: 10.6 days

The month with the most sunshine days is August (18.1 days).
The month with the least sunshine days is April (6.8 days).

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Average UV index in May
Glacier, WA

Average UV index in May - Glacier, WA
  • Average UV index in May: 3

The month with the highest UV index is July (UV index 5).
Months with the lowest UV index are January and November (UV index 1).

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Average cloud cover in May
Glacier, WA

Average cloud cover in May - Glacier, WA
  • Average cloud cover in May: 53

The month with the most cloud cover is March (Cloud cover 67).
The month with the least cloud cover is August (Cloud cover 34).

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Average visibility in May
Glacier, WA

Average visibility in May - Glacier, WA
  • Average visibility in May: 4mi

Months with the highest visibility are June, July and August (5mi).
Months with the lowest visibility are January, February, March, April, May, September, October, November and December (4mi).

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