May weather forecast
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

The last month of the spring, May, is a comfortable month in Salem, Oregon, with an average temperature fluctuating between 66.7°F (19.3°C) and 42.8°F (6°C).

Temperature

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

Humidity

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

Rainfall

In Salem, it is raining for 13.4 days, with typically 1.46" (37mm) of accumulated precipitation. Throughout the year, there are 162.5 rainfall days, and 25.08" (637mm) of precipitation is accumulated.

Snowfall

April through October are months without snowfall.

Daylight

In Salem, the average length of the day in May is 14h and 52min.
On the first day of the month, sunrise is at 6:01 am and sunset at 8:17 pm. On the last day of May, sunrise is at 5:29 am and sunset at 8:50 pm PDT.

Sunshine

In May, the average sunshine in Salem, Oregon, is 8.6h.

UV index

In Salem, 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: In May, the average maximum UV index of 4 translate into the following recommendations:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the temperature in May in Salem?

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

What is the average humidity in May in Salem?

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

How much does it rain in Salem in May?

In May, in Salem, the rain falls for 13.4 days. Throughout May, 1.46" (37mm) of precipitation is accumulated.

When it does not snow in Salem?

April through October are months without snowfall in Salem.

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

In May, the average day length in Salem, Oregon, is 14h and 52min.

When is the sunrise / sunset in May in Salem?

In May, on the first day of the month, sunrise is at 6:01 am and sunset at 8:17 pm. On the last day of the month, sunrise is at 5:29 am and sunset at 8:50 pm PDT.

How long on average sun shines in May in Salem?

The average sunshine duration in May in Salem is 8.6h.

How high is the UV index in May in Salem?

In May, the average daily maximum UV index in Salem is 4. A UV Index value of 3 to 5 symbolizes a medium hazard to health from unprotected exposure to UV radiation.
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
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"Hg

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

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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%

The 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").
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
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).
The 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: 14h and 52min

The month with the longest days is June (Average daylight: 15h and 33min).
The month with the shortest days is December (Average daylight: 8h and 51min).

  • Average sunshine in May: 8h and 36min

The month with the most sunshine is August (Average sunshine: 11h and 0min).
The month with the least sunshine is February (Average sunshine: 4h and 12min).

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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).
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
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

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

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