May weather forecast
Tumtum, WA

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Weather in May

May, the last month of the spring in Tumtum, is an enjoyable month, with temperature in the range of an average low of 41.4°F (5.2°C) and an average high of 65.8°F (18.8°C).

Temperature

As Tumtum, Washington, enters May, the average high-temperature increases from the a cool 54.7°F (12.6°C) of April to a comfortable 65.8°F (18.8°C). Despite drastic daytime highs, Tumtum logs an average low-temperature reading of 41.4°F (5.2°C) throughout May.

Humidity

The average relative humidity in May is 64%.

Rainfall

In Tumtum, in May, during 12.8 rainfall days, 1.69" (43mm) of precipitation is typically accumulated. Throughout the year, in Tumtum, there are 124.9 rainfall days, and 17.44" (443mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Tumtum, Washington, are January through May, September through December. May is the last month it regularly snows. During 0.2 snowfall days, in May, Tumtum aggregates 0.04" (1mm) of snow. In Tumtum, Washington, during the entire year, snow falls for 69.2 days and aggregates up to 42.99" (1092mm) of snow.

Daylight

In Tumtum, the average length of the day in May is 15h and 11min.
On the first day of the month, sunrise is at 5:31 am and sunset at 8:04 pm. On the last day of May, in Tumtum, sunrise is at 4:55 am and sunset at 8:41 pm PDT.

Sunshine

In May, the average sunshine is 10.2h.

UV index

In Tumtum, the average daily maximum UV index in May is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: The maximum UV index, 4 during May, leads to the following recommendations:
Take necessary precautions - Suggestions to elude sunburn are provided. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
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Frequently asked questions

What is the average May temperature in Tumtum?

The high-temperature, in May, in Tumtum, records 65.8°F (18.8°C), while the low-temperature is 41.4°F (5.2°C).

What is the average humidity in May in Tumtum?

The average relative humidity in May is 64%.

How much does it rain in Tumtum in May?

In May, the rain falls for 12.8 days. Throughout May, 1.69" (43mm) of precipitation is accumulated.

What is the last month it snows in Tumtum?

May is the last month it regularly snows in Tumtum, Washington. During 0.2 snowfall days, in May, Tumtum aggregates 0.04" (1mm) of snow.

What is the average length of the day in May in Tumtum?

The average day length in May in Tumtum is 15h and 11min.

When is the sunrise / sunset in May in Tumtum?

In May, on the first day of the month, sunrise is at 5:31 am and sunset at 8:04 pm. On the last day of the month, sunrise is at 4:55 am and sunset at 8:41 pm PDT.

How many hours of sunshine does Tumtum have in May?

In Tumtum, Washington, the average sunshine duration in May is 10.2h.

What is the UV index reading in May in Tumtum?

In Tumtum, Washington, the average daily maximum UV index in May is 4. A UV Index estimate of 3 to 5 represents a moderate vulnerability from unprotected exposure to 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
Tumtum, WA

Average temperature in May - Tumtum, WA
  • Average high temperature in May: 65.8°F

The warmest month (with the highest average high temperature) is August (84°F).
The month with the lowest average high temperature is December (31.3°F).

  • Average low temperature in May: 41.4°F

The month with the highest average low temperature is August (54.3°F).
The coldest month (with the lowest average low temperature) is December (20.3°F).

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Average pressure in May
Tumtum, WA

Average pressure in May - Tumtum, WA
  • Average pressure in May: 29.94"Hg

The month with the highest atmospheric pressure is January (30.19"Hg).
The months with the lowest atmospheric pressure are June and August (29.91"Hg).

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Average wind speed in May
Tumtum, WA

Average wind speed in May - Tumtum, WA
  • Average wind speed in May: 5.2mph

The windiest month (with the highest average wind speed) is April (5.6mph).
The calmest month (with the lowest average wind speed) is December (4mph).

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Average humidity in May
Tumtum, WA

Average humidity in May - Tumtum, WA
  • Average humidity in May: 64%

The month with the highest relative humidity is January (92%).
The month with the lowest relative humidity is August (43%).

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Average rainfall in May
Tumtum, WA

Average rainfall in May - Tumtum, WA
  • Average rainfall in May: 1.69"

The wettest month (with the highest rainfall) is January (2.4").
The driest month (with the least rainfall) is August (0.31").

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Average rainfall days in May
Tumtum, WA

Average rainfall days in May - Tumtum, WA
  • Average rainfall days in May: 12.8 days

The month with the highest number of rainy days is March (16.2 days).
The month with the least rainy days is August (5.1 days).

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Average snowfall in May
Tumtum, WA

Average snowfall in May - Tumtum, WA
  • Average snowfall in May: 0.04"

The month with the highest snowfall is January (13.23").
The months with the least snowfall are June, July and August (0").

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Average snowfall days in May
Tumtum, WA

Average snowfall days in May - Tumtum, WA
  • Average snowfall days in May: 0.2 days

The month with the highest number of snowfall days is December (16.9 days).
The months with the least snowfall days are June, July and August (0 days).

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

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

The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 30min).

  • Average sunshine in May: 10h and 1min

The month with the most sunshine is August (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).

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Average sunshine days in May
Tumtum, WA

Average sunshine days in May - Tumtum, WA
  • Average sunshine days in May: 16.4 days

The month with the most sunshine days is July (24.2 days).
The month with the least sunshine days is March (9.7 days).

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Average UV index in May
Tumtum, WA

Average UV index in May - Tumtum, WA
  • Average UV index in May: 4

The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are February, November and December (UV index 1).

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Average cloud cover in May
Tumtum, WA

Average cloud cover in May - Tumtum, WA
  • Average cloud cover in May: 34

The month with the most cloud cover is January (Cloud cover 64).
The month with the least cloud cover is August (Cloud cover 13).

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Average visibility in May
Tumtum, WA

Average visibility in May - Tumtum, WA
  • Average visibility in May: 6mi

The months with the highest visibility are April, May, June, July, August, September and October (6mi).
The month with the lowest visibility is January (3mi).

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Tumtum, Washington, USA

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