May weather forecast and climate
Salem, OR

An evening shot of the leafy town of Salem in Oregon
An evening shot of the leafy town of Salem in Oregon

Weather in May

May, the last month of the spring, in Salem, is an enjoyable month, with average temperature ranging between max 66.7°F (19.3°C) and min 42.8°F (6°C).

Temperature

In Salem, the average high-temperature in May slightly increases, from a mild 58.8°F (14.9°C) in April, to a comfortable 66.7°F (19.3°C). The average low-temperature, in May, is 42.8°F (6°C).

Humidity

In Salem, the average relative humidity in May is 76%.

Rainfall

In Salem, in May, during 13.4 rainfall days, 1.46" (37mm) of precipitation is typically accumulated. Throughout the year, there are 162.5 rainfall days, and 25.08" (637mm) of precipitation is accumulated.

Snowfall

In Salem snow does not fall in April through October.

Daylight

In Salem, the average length of the day is 14.9h.

Sunshine

The average sunshine in Salem is 8.6h.

UV index

The average daily maximum UV index in May is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from the exposure to the Sun's UV rays for average individuals.
Note: The average daily UV index of 4 transform into the following instructions:
Take precautions - Protection against sun damage is advised. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in May in Salem?

The average high-temperature, in May, is 66.7°F (19.3°C), while the average low-temperature is 42.8°F (6°C).

What is the average humidity in May in Salem?

In May, the average relative humidity in Salem is 76%.

How much does it rain in Salem in May?

In Salem, Oregon, in May, it is raining for 13.4 days, with typically 1.46" (37mm) of accumulated precipitation.

When it does not snow in Salem?

April through October are months without snowfall.

How many hours of daylight does Salem have in May?

In May, the average length of the day in Salem is 14.9h.

How long on average sun shines in May in Salem?

In May, the average sunshine is 8.6h.

How high is the UV index in May in Salem?

In Salem, Oregon, the average daily maximum UV index in May is 4. A UV Index of 3 to 5 symbolizes a moderate vulnerability from the exposure to the Sun's UV rays.

Average temperature in May
Salem, OR

Average temperature in May - Salem, OR
  • Average high temperature in May: 66.7°F

The warmest month (with the highest average high temperature) is August (82°F).
The month with the lowest average high temperature is December (45.5°F).

  • Average low temperature in May: 42.8°F

The month with the highest average low temperature is August (54.1°F).
The coldest month (with the lowest average low temperature) is December (34.5°F).

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Average pressure in May
Salem, OR

Average pressure in May - Salem, OR
  • Average pressure in May: 30.04"

The month with the highest atmospheric pressure is January (30.11").
Months with the lowest atmospheric pressure are August and September (30.01").

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Average wind speed in May
Salem, OR

Average wind speed in May - Salem, OR
  • Average wind speed in May: 4.5mph

The windiest months (with the highest average wind speed) are January, March and November (5.5mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).

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Average humidity in May
Salem, OR

Average humidity in May - Salem, OR
  • Average humidity in May: 76%

Months with the highest relative humidity are January, February and December (86%).
The month with the lowest relative humidity is August (65%).

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Average rainfall in May
Salem, OR

Average rainfall in May - Salem, OR
  • Average rainfall in May: 1.46"

The wettest month (with the highest rainfall) is December (3.94").
The driest month (with the least rainfall) is July (0.28").

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Average rainfall days in May
Salem, OR

Average rainfall days in May - Salem, OR
  • Average rainfall days in May: 13.4 days

The month with the highest number of rainy days is March (19.6 days).
The month with the least rainy days is July (3.9 days).

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Average snowfall in May
Salem, OR

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

The month with the highest snowfall is February (1.18").
Months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in May
Salem, OR

Average snowfall days in May - Salem, OR
  • Average snowfall days in May: 0 days

The month with the highest number of snowfall days is February (1.8 days).
Months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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Average daylight in May /
Average sunshine in May
Salem, OR

Average daylight in May / Average sunshine in May - Salem, OR
  • Average daylight in May: 14.9h

The month with the longest days is June (Average daylight: 15.6h).
The month with the shortest days is December (Average daylight: 8.8h).

  • Average sunshine in May: 8.6h

The month with the most sunshine is August (Average sunshine: 11h).
The month with the least sunshine is February (Average sunshine: 4.2h).

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Average sunshine days in May
Salem, OR

Average sunshine days in May - Salem, OR
  • Average sunshine days in May: 16.3 days

The month with the most sunshine days is July (26.3 days).
The month with the least sunshine days is March (8.8 days).

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Average UV index in May
Salem, OR

Average UV index in May - Salem, OR
  • Average UV index in May: 4

The month with the highest UV index is July (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in May
Salem, OR

Average cloud cover in May - Salem, OR
  • Average cloud cover in May: 48

The month with the most cloud cover is February (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 21).

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Average visibility in May
Salem, OR

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

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

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