May weather forecast
Opportunity, WA

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Weather in May

The last month of the spring, May, is a comfortable month in Opportunity, Washington, with an average temperature ranging between min 41.2°F (5.1°C) and max 65.1°F (18.4°C).

Temperature

May comes with an increase, with the average high-temperature moving from a cool 54.1°F (12.3°C) in April to an enjoyable 65.1°F (18.4°C). In the month of May, Opportunity witnesses a marked temperature drop at night, averaging a low of 41.2°F (5.1°C).

Humidity

In May, the average relative humidity is 65%.

Rainfall

In Opportunity, Washington, during May, the rain falls for 12.7 days and regularly aggregates up to 1.61" (41mm) of precipitation. In Opportunity, during the entire year, the rain falls for 125.4 days and collects up to 17.28" (439mm) of precipitation.

Snowfall

January through May, September through December are months with snowfall in Opportunity. May is the last month it regularly snows. During 0.2 snowfall days, in May, Opportunity aggregates 0.04" (1mm) of snow. In Opportunity, during the entire year, snow falls for 56.4 days and aggregates up to 37.4" (950mm) of snow.

Daylight

In May, the average length of the day in Opportunity is 15h and 10min.
On the first day of the month, sunrise is at 5:30 am and sunset at 8:01 pm. On the last day of May, sunrise is at 4:55 am and sunset at 8:38 pm PDT.

Sunshine

The average sunshine in May in Opportunity is 10.3h.

UV index

The average daily maximum UV index in May is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for average individuals.
Note: The maximum daily UV index of 4 in May interprets into the following recommendations:
Act with care - Obligation to protect against skin and eye damage is highlighted. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
Updated: Feb 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the average May temperature in Opportunity?

May temperatures in Opportunity, Washington, vary between a high-temperature of 65.1°F (18.4°C) and a low-temperature of 41.2°F (5.1°C).

What is the average humidity in May in Opportunity?

The average relative humidity in May is 65%.

How much does it rain in Opportunity in May?

In Opportunity, in May, during 12.7 rainfall days, 1.61" (41mm) of precipitation is typically accumulated.

What is the last month it snows in Opportunity?

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

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

The average day length in May in Opportunity, Washington, is 15h and 10min.

When is the sunrise / sunset in May in Opportunity?

In May, on the first day of the month, sunrise is at 5:30 am and sunset at 8:01 pm. On the last day of the month, sunrise is at 4:55 am and sunset at 8:38 pm PDT.

How long on average sun shines in May in Opportunity?

In Opportunity, the average sunshine duration in May is 10.3h.

How high is the UV index in May in Opportunity?

In Opportunity, the average daily maximum UV index in May is 4. A UV Index estimate of 3 to 5 represents a moderate health threat from exposure to Sun's UV rays.
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
Opportunity, WA

Average temperature in May - Opportunity, WA
  • Average high temperature in May: 65.1°F

The warmest month (with the highest average high temperature) is August (83.3°F).
The month with the lowest average high temperature is December (32°F).

  • Average low temperature in May: 41.2°F

The month with the highest average low temperature is August (55.9°F).
The coldest month (with the lowest average low temperature) is December (21.9°F).

Average pressure in May
Opportunity, WA

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

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

Average wind speed in May
Opportunity, WA

Average wind speed in May - Opportunity, WA
  • Average wind speed in May: 5.5mph

The windiest month (with the highest average wind speed) is April (6.1mph).
The calmest month (with the lowest average wind speed) is December (4.7mph).

Average humidity in May
Opportunity, WA

Average humidity in May - Opportunity, WA
  • Average humidity in May: 65%

The month with the highest relative humidity is January (91%).
The month with the lowest relative humidity is August (43%).

Average rainfall in May
Opportunity, WA

Average rainfall in May - Opportunity, WA
  • Average rainfall in May: 1.61"

The wettest month (with the highest rainfall) is January (2.28").
The driest months (with the least rainfall) are July and August (0.35").

Average rainfall days in May
Opportunity, WA

Average rainfall days in May - Opportunity, WA
  • Average rainfall days in May: 12.7 days

The month with the highest number of rainy days is March (16 days).
The month with the least rainy days is July (5.1 days).

Average snowfall in May
Opportunity, WA

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

The month with the highest snowfall is January (10.51").
The months with the least snowfall are June, July and August (0").

Average snowfall days in May
Opportunity, WA

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

The month with the highest number of snowfall days is December (13.9 days).
The months with the least snowfall days are June, July and August (0 days).

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

Average daylight in May / Average sunshine in May - Opportunity, 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: 10h and 2min

The month with the most sunshine is August (Average sunshine: 12h and 0min).
The months with the least sunshine are January and December (Average sunshine: 3h and 48min).

Average sunshine days in May
Opportunity, WA

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

The month with the most sunshine days is July (24.3 days).
The month with the least sunshine days is March (10.3 days).

Average UV index in May
Opportunity, WA

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

The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is December (UV index 1).

Average cloud cover in May
Opportunity, WA

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

The month with the most cloud cover is January (Cloud cover 62).
The months with the least cloud cover are July and August (Cloud cover 13).

Average visibility in May
Opportunity, WA

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

The months with the highest visibility are April, May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February and December (4mi).

Opportunity, Washington, USA

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