May weather forecast
Monroe, WA

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The red Washington Water Powerhouse, next to a large bridge over the Spokane River and scenic waterfalls in Monroe, Washington
The red Washington Water Powerhouse, next to a large bridge over the Spokane River and scenic waterfalls in Monroe, Washington

Weather in May

The last month of the spring, May, is an enjoyable month in Monroe, Washington, with temperature in the range of an average low of 41.5°F (5.3°C) and an average high of 63.3°F (17.4°C).

Temperature

The shift into May brings a slight increase in the average high-temperature, moving from a fresh 54.3°F (12.4°C) in April to a refreshing 63.3°F (17.4°C). Nightly average temperatures in May reveal a significant dip from daytime highs in Monroe, registering a consistent an icy 41.5°F (5.3°C).

Humidity

The average relative humidity in May in Monroe is 77%.

Rainfall

In Monroe, Washington, during May, the rain falls for 9.1 days and regularly aggregates up to 0.75" (19mm) of precipitation. Throughout the year, there are 115.8 rainfall days, and 11.81" (300mm) of precipitation is accumulated.

Snowfall

In Monroe, snow does not fall in May through October.

Daylight

In May, the average length of the day in Monroe is 15h and 11min.
On the first day of May, sunrise is at 5:48 am and sunset at 8:21 pm. On the last day of the month, sunrise is at 5:13 am and sunset at 8:58 pm PDT.

Sunshine

The average sunshine in May in Monroe is 8.8h.

UV index

The average daily maximum UV index in May is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: A daily maximum UV index of 4 in May translates into the following instructions:
Exercise caution. Those with pale skin may experience burns in less than half an hour. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. 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.
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Frequently asked questions

What is the temperature in May in Monroe?

An average high-temperature, in May, in Monroe, is 63.3°F (17.4°C) and the average low-temperature is 41.5°F (5.3°C).

What is the average humidity in May in Monroe?

The average relative humidity in May is 77%.

How much does it rain in Monroe in May?

In May, in Monroe, the rain falls for 9.1 days. Throughout May, 0.75" (19mm) of precipitation is accumulated.

When it does not snow in Monroe?

May through October are months without snowfall in Monroe, Washington.

Does it snow in Monroe in May?

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

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

The average day length in May in Monroe, Washington, is 15h and 11min.

What time are sunrise and sunset in May in Monroe?

In May, on the first day of the month, sunrise is at 5:48 am and sunset at 8:21 pm. On the last day of the month, in Monroe, Washington, sunrise is at 5:13 am and sunset at 8:58 pm PDT.

How many hours of sunshine does Monroe have in May?

In May, the average sunshine duration is 8.8h.

What is the UV index reading in May in Monroe?

In Monroe, Washington, the average daily maximum UV index in May is 4. A UV Index of 3 to 5 symbolizes a medium health risk from unprotected exposure to 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
Monroe, WA

Average temperature in May - Monroe, WA
  • Average high temperature in May: 63.3°F

The warmest month (with the highest average high temperature) is August (75.6°F).
The month with the lowest average high temperature is December (41.2°F).

  • Average low temperature in May: 41.5°F

The month with the highest average low temperature is August (49.8°F).
The coldest month (with the lowest average low temperature) is December (31.8°F).

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Average pressure in May
Monroe, WA

Average pressure in May - Monroe, WA
  • Average pressure in May: 30.01"Hg

The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).

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Average wind speed in May
Monroe, WA

Average wind speed in May - Monroe, WA
  • Average wind speed in May: 3.7mph

The windiest month (with the highest average wind speed) is January (4.9mph).
The calmest month (with the lowest average wind speed) is August (3.3mph).

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Average humidity in May
Monroe, WA

Average humidity in May - Monroe, WA
  • Average humidity in May: 77%

The months with the highest relative humidity are January, February and December (86%).
The month with the lowest relative humidity is July (71%).

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Average rainfall in May
Monroe, WA

Average rainfall in May - Monroe, WA
  • Average rainfall in May: 0.75"

The wettest month (with the highest rainfall) is December (1.85").
The driest month (with the least rainfall) is August (0.2").

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Average rainfall days in May
Monroe, WA

Average rainfall days in May - Monroe, WA
  • Average rainfall days in May: 9.1 days

The month with the highest number of rainy days is March (13.6 days).
The month with the least rainy days is August (4 days).

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Average snowfall in May
Monroe, WA

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

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

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Average snowfall days in May
Monroe, WA

Average snowfall days in May - Monroe, WA
  • Average snowfall days in May: 0 days

The month with the highest number of snowfall days is February (2.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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

Average daylight in May / Average sunshine in May - Monroe, 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: 8h and 5min

The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 3h and 48min).

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Average sunshine days in May
Monroe, WA

Average sunshine days in May - Monroe, WA
  • Average sunshine days in May: 19.3 days

The month with the most sunshine days is August (25.5 days).
The month with the least sunshine days is April (15 days).

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Average UV index in May
Monroe, WA

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

The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in May
Monroe, WA

Average cloud cover in May - Monroe, WA
  • Average cloud cover in May: 46

The month with the most cloud cover is December (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 28).

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Average visibility in May
Monroe, WA

Average visibility in May - Monroe, WA
  • Average visibility in May: 5mi

The month with the highest visibility is July (6mi).
The months with the lowest visibility are January, February, March, April, November and December (4mi).

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Monroe, Washington, USA

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