May weather forecast
Gresham, OR

The fall colors in the trees and the fields around a beautiful house in Gresham, Oregon
The fall colors in the trees and the fields around a beautiful house in Gresham, Oregon

Weather in May

The last month of the spring, May, is an enjoyable month in Gresham, Oregon, with an average temperature fluctuating between 43.3°F (6.3°C) and 66.2°F (19°C).

Temperature

In Gresham, Oregon, the average high-temperature in May slightly increases from a mild 57.7°F (14.3°C) in April to an enjoyable 66.2°F (19°C). In Gresham, the average low-temperature is 43.3°F (6.3°C).

Humidity

In Gresham, the average relative humidity in May is 73%.

Rainfall

In Gresham, during May, the rain falls for 13.5 days and regularly aggregates up to 1.85" (47mm) of precipitation. Throughout the year, there are 165.6 rainfall days, and 34.65" (880mm) of precipitation is accumulated.

Snowfall

April through October are months without snowfall in Gresham.

Daylight

In May, the average length of the day is 14h and 56min.
On the first day of May in Gresham, sunrise is at 5:57 am and sunset at 8:16 pm. On the last day of the month, sunrise is at 5:24 am and sunset at 8:50 pm PDT.

Sunshine

In May, the average sunshine is 8.8h.

UV index

In Gresham, the average daily maximum UV index in May is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for average individuals.
Note: In May, the average maximum UV index of 4 translate into the following recommendations:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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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FAQ

What is the temperature in May in Gresham?

In May, in Gresham, the average high-temperature is 66.2°F (19°C), and the average low-temperature is 43.3°F (6.3°C).

What is the average humidity in May in Gresham?

In May, the average relative humidity is 73%.

How many days does it rain in May in Gresham?

In Gresham, in May, it is raining for 13.5 days, with typically 1.85" (47mm) of accumulated precipitation.

When it does not snow in Gresham?

April through October are months without snowfall.

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

In May, the average day length in Gresham, Oregon, is 14h and 56min.

When is the sunrise / sunset in May in Gresham?

On the first day of May in Gresham, sunrise is at 5:57 am and sunset at 8:16 pm. On the last day of the month, sunrise is at 5:24 am and sunset at 8:50 pm PDT.

How long on average sun shines in May in Gresham?

In Gresham, Oregon, the average sunshine duration in May is 8.8h.

What is the UV index intensity in May in Gresham?

In Gresham, 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 Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Gresham, OR

Average temperature in May - Gresham, OR
  • Average high temperature in May: 66.2°F

The warmest month (with the highest average high temperature) is August (80.4°F).
The month with the lowest average high temperature is December (43.7°F).

  • Average low temperature in May: 43.3°F

The month with the highest average low temperature is August (53.4°F).
The coldest month (with the lowest average low temperature) is December (33.8°F).

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Average pressure in May
Gresham, OR

Average pressure in May - Gresham, OR
  • Average pressure in May: 30.02"Hg

The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).

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Average wind speed in May
Gresham, OR

Average wind speed in May - Gresham, OR
  • Average wind speed in May: 4.2mph

The windiest month (with the highest average wind speed) is January (6.8mph).
The calmest month (with the lowest average wind speed) is August (3.5mph).

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Average humidity in May
Gresham, OR

Average humidity in May - Gresham, OR
  • Average humidity in May: 73%

The month with the highest relative humidity is February (84%).
The month with the lowest relative humidity is August (64%).

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Average rainfall in May
Gresham, OR

Average rainfall in May - Gresham, OR
  • Average rainfall in May: 1.85"

The wettest month (with the highest rainfall) is December (5.31").
The driest month (with the least rainfall) is July (0.31").

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Average rainfall days in May
Gresham, OR

Average rainfall days in May - Gresham, OR
  • Average rainfall days in May: 13.5 days

The month with the highest number of rainy days is March (19.3 days).
The month with the least rainy days is August (4.4 days).

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Average snowfall in May
Gresham, OR

Average snowfall in May - Gresham, OR
  • Average snowfall in May: 0"

The month with the highest snowfall is March (1.73").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in May
Gresham, OR

Average snowfall days in May - Gresham, OR
  • 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
Gresham, OR

Average daylight in May / Average sunshine in May - Gresham, OR
  • Average daylight in May: 14h and 56min

The month with the longest days is June (Average daylight: 15h and 37min).
The month with the shortest days is December (Average daylight: 8h and 47min).

  • Average sunshine in May: 8h and 48min

The months with the most sunshine are July and August (Average sunshine: 10h and 54min).
The months with the least sunshine are January and February (Average sunshine: 4h and 12min).

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Average sunshine days in May
Gresham, OR

Average sunshine days in May - Gresham, OR
  • Average sunshine days in May: 15.8 days

The month with the most sunshine days is July (25 days).
The month with the least sunshine days is February (9.7 days).

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Average UV index in May
Gresham, OR

Average UV index in May - Gresham, OR
  • 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, November and December (UV index 2).

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Average cloud cover in May
Gresham, OR

Average cloud cover in May - Gresham, OR
  • Average cloud cover in May: 47

The month with the most cloud cover is February (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 24).

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Average visibility in May
Gresham, OR

Average visibility in May - Gresham, OR
  • Average visibility in May: 5mi

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

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