August 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 August

August, the last month of the summer, in Salem, is also a moderately hot month, with average temperature fluctuating between 82°F (27.8°C) and 54.1°F (12.3°C).

Temperature

With an average high-temperature of 82°F (27.8°C) and an average low-temperature of 54.1°F (12.3°C), August is the warmest month.

Heat index

In August, the average heat index is calculated to 85.5°F (29.7°C). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'apparent temperature', 'real feel', or 'feels like', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. This effect is individual, with diverse people perceiving weather differently for numerous reasons (clothing, metabolic differences, differences in body mass, height, and shape), and activity. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

The least humid month is August, with an average relative humidity of 65%.

Rainfall

In August, in Salem, the rain falls for 4 days. Throughout August, 0.31" (8mm) of precipitation is accumulated. In Salem, during the entire year, the rain falls for 162.5 days and collects up to 25.08" (637mm) of precipitation.

Snowfall

April through October are months without snowfall.

Daylight

The average length of the day in Salem is 14h.

Sunshine

With an average of 11h of sunshine, August has the most sunshine of the year in Salem.

UV index

The average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: In August, the average maximum UV index of 5 translate into the following recommendations:
Take precautions - Protection against the skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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 warmest month in Salem?

With an average high-temperature of 82°F (27.8°C) and an average low-temperature of 54.1°F (12.3°C), August is the warmest month.

What is the temperature in August in Salem?

In Salem, Oregon, in August, the average high-temperature is 82°F (27.8°C), and the average low-temperature is 54.1°F (12.3°C). In August, the average heat index (a.k.a. 'apparent temperature', 'real feel'), that combines relative humidity and air temperature, is calculated to 85.5°F (29.7°C).

What is the least humid month in Salem?

The least humid month is August, with an average relative humidity of 65%.

What is the average humidity in August in Salem?

In Salem, Oregon, the average relative humidity in August is 65%.

How much does it rain in Salem in August?

In August, in Salem, the rain falls for 4 days. Throughout August, 0.31" (8mm) of precipitation is accumulated.

When it does not snow in Salem?

April through October are months without snowfall in Salem, Oregon.

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

In Salem, the average length of the day in August is 14h.

What month has the most sunshine in Salem?

August has the most sunshine of the year in Salem, with an average of 11h of sunshine.

How many hours of sunshine does Salem have in August?

In August, the average sunshine in Salem, Oregon, is 11h.

What is the UV index intensity in August in Salem?

In Salem, Oregon, the average daily maximum UV index in August is 5. A UV Index estimate of 3 to 5 represents a medium hazard to health from unprotected exposure to the UV radiation.

Average temperature in August
Salem, OR

Average temperature in August - Salem, OR
  • Average high temperature in August: 82°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 August: 54.1°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 August
Salem, OR

Average pressure in August - Salem, OR
  • Average pressure in August: 30.01"

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 August
Salem, OR

Average wind speed in August - Salem, OR
  • Average wind speed in August: 4.2mph

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 August
Salem, OR

Average humidity in August - Salem, OR
  • Average humidity in August: 65%

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 August
Salem, OR

Average rainfall in August - Salem, OR
  • Average rainfall in August: 0.31"

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 August
Salem, OR

Average rainfall days in August - Salem, OR
  • Average rainfall days in August: 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 August
Salem, OR

Average snowfall in August - Salem, OR
  • Average snowfall in August: 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 August
Salem, OR

Average snowfall days in August - Salem, OR
  • Average snowfall days in August: 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 August /
Average sunshine in August
Salem, OR

Average daylight in August / Average sunshine in August - Salem, OR
  • Average daylight in August: 14h

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 August: 11h

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 August
Salem, OR

Average sunshine days in August - Salem, OR
  • Average sunshine days in August: 25.2 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 August
Salem, OR

Average UV index in August - Salem, OR
  • Average UV index in August: 5

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 August
Salem, OR

Average cloud cover in August - Salem, OR
  • Average cloud cover in August: 21

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 August
Salem, OR

Average visibility in August - Salem, OR
  • Average visibility in August: 6mi

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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