May weather forecast
Copalis Crossing, WA

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Weather in May

The last month of the spring, May, is a refreshing month in Copalis Crossing, Washington, with an average temperature ranging between max 57.6°F (14.2°C) and min 46.9°F (8.3°C).

Temperature

During May, the average high-temperature is a refreshing 57.6°F (14.2°C), maintaining a close resemblance to that of the preceding month. During the month of May, an average temperature of 46.9°F (8.3°C) is noted during the nights.

Humidity

The months with the lowest humidity are April through June, with an average relative humidity of 81%.

Rainfall

In Copalis Crossing, in May, during 11.5 rainfall days, 0.94" (24mm) of precipitation is typically accumulated. Throughout the year, there are 152.8 rainfall days, and 19.41" (493mm) of precipitation is accumulated.

Snowfall

April through October and December are months without snowfall.

Daylight

The average length of the day in May is 15h and 6min.
On the first day of May, sunrise is at 5:58 am and sunset at 8:27 pm. On the last day of the month, sunrise is at 5:24 am and sunset at 9:03 pm PDT.

Sunshine

In May, the average sunshine is 8.2h.

UV index

The months with the highest UV index in Copalis Crossing are May through September, with an average maximum UV index of 4. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: In May, a daily UV index of 4 turns into the following recommendations:
Take precautions. Light skin individuals may get burned in less than 30 minutes. To guard against the harmful effects of the Sun, minimize exposure during midday. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
Updated: Jun 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in May?

In May, the average high-temperature and low-temperature are 57.6°F (14.2°C) and 46.9°F (8.3°C) respectively.

What is the least humid month?

April through June, with an average relative humidity of 81%, are the least humid months.

What is the average humidity in May in Copalis Crossing?

In May, the average relative humidity is 81%.

How many days does it rain in May?

In Copalis Crossing, in May, it is raining for 11.5 days, with typically 0.94" (24mm) of accumulated precipitation.

When it does not snow?

In Copalis Crossing, snow does not fall in April through October and December.

What is the average length of the day in May?

The average day length in May in Copalis Crossing is 15h and 6min.

What time are sunrise and sunset in May?

In May, on the first day of the month, sunrise is at 5:58 am and sunset at 8:27 pm. On the last day of the month, sunrise is at 5:24 am and sunset at 9:03 pm PDT.

How many hours of sunshine does Copalis Crossing have in May?

In May, the average sunshine duration in Copalis Crossing is 8.2h.

What is the month with the highest UV index?

The months with the highest UV index are May through September, with an average maximum UV index of 4.

What is the UV index intensity in May?

In Copalis Crossing, the average daily maximum UV index in May is 4. A UV Index value of 3 to 5 symbolizes a medium health risk from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Copalis Crossing, WA

Average temperature in May - Copalis Crossing, WA
  • Average high temperature in May: 57.6°F

The warmest month (with the highest average high temperature) is August (65.8°F).
The month with the lowest average high temperature is December (45.5°F).

  • Average low temperature in May: 46.9°F

The month with the highest average low temperature is August (54.5°F).
The coldest month (with the lowest average low temperature) is December (39.7°F).

Average pressure in May
Copalis Crossing, WA

Average pressure in May - Copalis Crossing, WA
  • Average pressure in May: 30.06"Hg

The month with the highest atmospheric pressure is July (30.08"Hg).
The month with the lowest atmospheric pressure is March (30"Hg).

Average wind speed in May
Copalis Crossing, WA

Average wind speed in May - Copalis Crossing, WA
  • Average wind speed in May: 8.1mph

The windiest month (with the highest average wind speed) is January (10.9mph).
The calmest month (with the lowest average wind speed) is September (7.1mph).

Average humidity in May
Copalis Crossing, WA

Average humidity in May - Copalis Crossing, WA
  • Average humidity in May: 81%

The month with the highest relative humidity is December (85%).
The months with the lowest relative humidity are April, May and June (81%).

Average rainfall in May
Copalis Crossing, WA

Average rainfall in May - Copalis Crossing, WA
  • Average rainfall in May: 0.94"

The wettest month (with the highest rainfall) is December (3.35").
The driest month (with the least rainfall) is July (0.24").

Average rainfall days in May
Copalis Crossing, WA

Average rainfall days in May - Copalis Crossing, WA
  • Average rainfall days in May: 11.5 days

The month with the highest number of rainy days is December (18.5 days).
The month with the least rainy days is July (5.6 days).

Average snowfall in May
Copalis Crossing, WA

Average snowfall in May - Copalis Crossing, WA
  • Average snowfall in May: 0"

The month with the highest snowfall is February (1.02").
The months with the least snowfall are April, May, June, July, August, September, October and December (0").

Average snowfall days in May
Copalis Crossing, WA

Average snowfall days in May - Copalis Crossing, WA
  • Average snowfall days in May: 0 days

The month with the highest number of snowfall days is February (1.6 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

Average daylight in May /
Average sunshine in May
Copalis Crossing, WA

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

The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).

  • Average sunshine in May: 8h and 1min

The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).

Average sunshine days in May
Copalis Crossing, WA

Average sunshine days in May - Copalis Crossing, WA
  • Average sunshine days in May: 15.9 days

The month with the most sunshine days is July (23.8 days).
The month with the least sunshine days is December (10.7 days).

Average UV index in May
Copalis Crossing, WA

Average UV index in May - Copalis Crossing, WA
  • Average UV index in May: 4

The months with the highest UV index are May, June, July, August and September (UV index 4).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in May
Copalis Crossing, WA

Average cloud cover in May - Copalis Crossing, WA
  • Average cloud cover in May: 48

The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is July (Cloud cover 33).

Average visibility in May
Copalis Crossing, WA

Average visibility in May - Copalis Crossing, WA
  • Average visibility in May: 6mi

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

Copalis Crossing, Washington, USA

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