May weather forecast
Winthrop, WA

A mirror view in the blue water of Blue Lake of the trees and rock cliffs nearby, in Winthrop, Washington
A mirror view in the blue water of Blue Lake of the trees and rock cliffs nearby, in Winthrop, Washington

Weather in May

The last month of the spring, May, is a moderate month in Winthrop, Washington, with temperature in the range of an average high of 58.3°F (14.6°C) and an average low of 35.2°F (1.8°C).

Temperature

In Winthrop, the average high-temperature in May rises from a frosty 46°F (7.8°C) in April to a mild 58.3°F (14.6°C). In May, the average low-temperature is 35.2°F (1.8°C).

Humidity

In Winthrop, the average relative humidity in May is 68%.

Rainfall

In Winthrop, during 14.2 rainfall days, 1.42" (36mm) of precipitation is typically accumulated. In Winthrop, during the entire year, the rain falls for 142.6 days and collects up to 17.91" (455mm) of precipitation.

Snowfall

In Winthrop, Washington, snow does not fall in May through August.

Daylight

The average length of the day in May is 15h and 16min.
On the first day of the month, sunrise is at 5:40 am and sunset at 8:14 pm. On the last day of May, in Winthrop, sunrise is at 5:03 am and sunset at 8:53 pm PDT.

Sunshine

In May, the average sunshine in Winthrop, Washington, is 10.6h.

UV index

In May, the average daily maximum UV index in Winthrop is 4. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 4 in May interpret into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in May in Winthrop?

In May, in Winthrop, the average high-temperature is 58.3°F (14.6°C), and the average low-temperature is 35.2°F (1.8°C).

What is the average humidity in May in Winthrop?

In May, the average relative humidity in Winthrop is 68%.

How many days does it rain in May in Winthrop?

In Winthrop, Washington, during May, the rain falls for 14.2 days and regularly aggregates up to 1.42" (36mm) of precipitation.

When it does not snow in Winthrop?

May through August are months without snowfall.

Does it snow in Winthrop in May?

In May, in Winthrop, Washington, it doesn't snow. April is the latest month when it typically snows.

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

In Winthrop, the average day length in May is 15h and 16min.

What time are sunrise and sunset in May in Winthrop?

In May, on the first day of the month, sunrise is at 5:40 am and sunset at 8:14 pm. On the last day of the month, in Winthrop, Washington, sunrise is at 5:03 am and sunset at 8:53 pm PDT.

How long on average sun shines in May in Winthrop?

In May, the average sunshine duration in Winthrop, Washington, is 10.6h.

How high is the UV index in May in Winthrop?

In Winthrop, the average daily maximum UV index in May is 4. A UV Index reading of 3 to 5 represents a medium health risk from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Winthrop, WA

Average temperature in May - Winthrop, WA
  • Average high temperature in May: 58.3°F

The warmest month (with the highest average high temperature) is August (75.9°F).
The month with the lowest average high temperature is December (27.5°F).

  • Average low temperature in May: 35.2°F

The month with the highest average low temperature is August (47.8°F).
The coldest month (with the lowest average low temperature) is December (13.5°F).

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Average pressure in May
Winthrop, WA

Average pressure in May - Winthrop, WA
  • Average pressure in May: 29.96"Hg

The month with the highest atmospheric pressure is January (30.15"Hg).
The months with the lowest atmospheric pressure are June and August (29.95"Hg).

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Average wind speed in May
Winthrop, WA

Average wind speed in May - Winthrop, WA
  • Average wind speed in May: 4.6mph

The windiest months (with the highest average wind speed) are June and July (5mph).
The calmest months (with the lowest average wind speed) are January and December (3.6mph).

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Average humidity in May
Winthrop, WA

Average humidity in May - Winthrop, WA
  • Average humidity in May: 68%

The month with the highest relative humidity is January (93%).
The months with the lowest relative humidity are July and August (53%).

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Average rainfall in May
Winthrop, WA

Average rainfall in May - Winthrop, WA
  • Average rainfall in May: 1.42"

The wettest month (with the highest rainfall) is December (2.48").
The driest month (with the least rainfall) is July (0.31").

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Average rainfall days in May
Winthrop, WA

Average rainfall days in May - Winthrop, WA
  • Average rainfall days in May: 14.2 days

The month with the highest number of rainy days is March (17.3 days).
The month with the least rainy days is August (6.1 days).

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Average snowfall in May
Winthrop, WA

Average snowfall in May - Winthrop, WA
  • Average snowfall in May: 0"

The month with the highest snowfall is December (12.87").
The months with the least snowfall are May, June, July and August (0").

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Average snowfall days in May
Winthrop, WA

Average snowfall days in May - Winthrop, WA
  • Average snowfall days in May: 0.1 days

The month with the highest number of snowfall days is December (15.3 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
Winthrop, WA

Average daylight in May / Average sunshine in May - Winthrop, WA
  • Average daylight in May: 15h and 16min

The month with the longest days is June (Average daylight: 16h and 3min).
The month with the shortest days is December (Average daylight: 8h and 23min).

  • Average sunshine in May: 10h and 36min

The month with the most sunshine is August (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).

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Average sunshine days in May
Winthrop, WA

Average sunshine days in May - Winthrop, WA
  • Average sunshine days in May: 14.2 days

The month with the most sunshine days is August (23 days).
The month with the least sunshine days is March (8.3 days).

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Average UV index in May
Winthrop, WA

Average UV index in May - Winthrop, 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 January, February and November (UV index 1).

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Average cloud cover in May
Winthrop, WA

Average cloud cover in May - Winthrop, WA
  • Average cloud cover in May: 33

The month with the most cloud cover is January (Cloud cover 55).
The month with the least cloud cover is August (Cloud cover 15).

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Average visibility in May
Winthrop, WA

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

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

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