September 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 September

September, the first month of the autumn in Salem, is also a moderately hot month, with an average temperature ranging between min 50.9°F (10.5°C) and max 74.7°F (23.7°C).

Temperature

In Salem, the average high-temperature in September slightly decreases from 82°F (27.8°C) in August to a still warm 74.7°F (23.7°C). The average low-temperature, in Salem, Oregon, is 50.9°F (10.5°C).

Humidity

In September, the average relative humidity in Salem, Oregon, is 70%.

Rainfall

In Salem, during September, the rain falls for 8.9 days and regularly aggregates up to 1.22" (31mm) of precipitation. 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 September, the average length of the day in Salem is 12h and 30min.
On the first day of the month, sunrise is at 6:34 am and sunset at 7:49 pm. On the last day of September, sunrise is at 7:09 am and sunset at 6:54 pm PDT.

Sunshine

In Salem, the average sunshine in September is 9.4h.

UV index

In September, the average daily maximum UV index in Salem is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the ordinary person.
Note: The daily maximum UV index of 4 in September interpret into the following advice:
Take precautions - Protection against skin and eye damage is obliged. 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 average humidity in September in Salem?

The average relative humidity in September in Salem is 70%.

How many days does it rain in September in Salem?

In September, in Salem, the rain falls for 8.9 days. Throughout September, 1.22" (31mm) of precipitation is accumulated.

When it does not snow in Salem?

April through October are months without snowfall.

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

In Salem, the average day length in September is 12h and 30min.

What time are sunrise and sunset in September in Salem?

On the first day of September in Salem, sunrise is at 6:34 am and sunset at 7:49 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 6:54 pm PDT.

How long on average sun shines in September in Salem?

In Salem, the average sunshine duration in September is 9.4h.

How high is the UV index in September in Salem?

In September, 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 temperature in September
Salem, OR

Average temperature in September - Salem, OR
  • Average high temperature in September: 74.7°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 September: 50.9°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 September
Salem, OR

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

Average wind speed in September - Salem, OR
  • Average wind speed in September: 4.4mph

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 September
Salem, OR

Average humidity in September - Salem, OR
  • Average humidity in September: 70%

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 September
Salem, OR

Average rainfall in September - Salem, OR
  • Average rainfall in September: 1.22"

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 September
Salem, OR

Average rainfall days in September - Salem, OR
  • Average rainfall days in September: 8.9 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 September
Salem, OR

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

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

Average daylight in September / Average sunshine in September - Salem, OR
  • Average daylight in September: 12h and 30min

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 September: 9.4h

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 September
Salem, OR

Average sunshine days in September - Salem, OR
  • Average sunshine days in September: 20 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 September
Salem, OR

Average UV index in September - Salem, OR
  • Average UV index in September: 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 September
Salem, OR

Average cloud cover in September - Salem, OR
  • Average cloud cover in September: 32

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 September
Salem, OR

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

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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