September weather forecast
Beaverton, OR

Colored yellow, brown and golden tree colors under a perfect blue, cloudy sky in the fall, mirrored in the calm lake water in Beaverton, Oregon
Colored yellow, brown and golden tree colors under a perfect blue, cloudy sky in the fall, mirrored in the calm lake water in Beaverton, Oregon

Weather in September

The first month of the autumn, September, is also a moderately hot month in Beaverton, Oregon, with average temperature fluctuating between 52°F (11.1°C) and 74.3°F (23.5°C).

Temperature

In September, the average high-temperature marginally drops, from 81.7°F (27.6°C) in August, to a still moderately hot 74.3°F (23.5°C). The average low-temperature, in September, is 52°F (11.1°C).

Humidity

The average relative humidity in September is 69%.

Rainfall

In Beaverton, in September, during 10.5 rainfall days, 1.54" (39mm) of precipitation is typically accumulated. Throughout the year, in Beaverton, there are 173.2 rainfall days, and 30.55" (776mm) of precipitation is accumulated.

Snowfall

April through October are months without snowfall in Beaverton.

Daylight

In September, the average length of the day is 12.5h.

Sunshine

The average sunshine in Beaverton is 9.2h.

UV index

In Beaverton, Oregon, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from the exposure to the Sun's UV radiation for ordinary individuals.
Note: The daily maximum UV index of 4 in September interpret into the following advice:
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. 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.
[Resources]

FAQ

What is the average humidity in September in Beaverton?

In Beaverton, the average relative humidity in September is 69%.

How much does it rain in Beaverton in September?

In Beaverton, Oregon, in September, during 10.5 rainfall days, 1.54" (39mm) of precipitation is typically accumulated.

When it does not snow in Beaverton?

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

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

The average length of the day in September in Beaverton, Oregon, is 12.5h.

How long on average sun shines in September in Beaverton?

The average sunshine in September in Beaverton is 9.2h.

What is the UV index reading in September in Beaverton?

In September, the average daily maximum UV index in Beaverton is 4. A UV Index reading of 3 to 5 represents a moderate health threat from unprotected exposure to the UV radiation.

Average temperature in September
Beaverton, OR

Average temperature in September - Beaverton, OR
  • Average high temperature in September: 23.5°C

The warmest month (with the highest average high temperature) is August (27.6°C).
The month with the lowest average high temperature is December (6.8°C).

  • Average low temperature in September: 11.1°C

The month with the highest average low temperature is August (13.1°C).
The coldest month (with the lowest average low temperature) is December (1.5°C).

[Resources]

Average pressure in September
Beaverton, OR

Average pressure in September - Beaverton, OR
  • Average pressure in September: 1016.3mbar

The month with the highest atmospheric pressure is January (1019.7mbar).
The month with the lowest atmospheric pressure is August (1016.1mbar).

[Resources]

Average wind speed in September
Beaverton, OR

Average wind speed in September - Beaverton, OR
  • Average wind speed in September: 6.6km/h

The windiest month (with the highest average wind speed) is January (8.7km/h).
The calmest month (with the lowest average wind speed) is August (6.5km/h).

[Resources]

Average humidity in September
Beaverton, OR

Average humidity in September - Beaverton, OR
  • Average humidity in September: 69%

The months with the highest relative humidity are February and December (84%).
The month with the lowest relative humidity is August (63%).

[Resources]

Average rainfall in September
Beaverton, OR

Average rainfall in September - Beaverton, OR
  • Average rainfall in September: 39mm

The wettest month (with the highest rainfall) is December (117mm).
The driest month (with the least rainfall) is July (8mm).

[Resources]

Average rainfall days in September
Beaverton, OR

Average rainfall days in September - Beaverton, OR
  • Average rainfall days in September: 10.5 days

The month with the highest number of rainy days is March (20.6 days).
The month with the least rainy days is August (4.6 days).

[Resources]

Average snowfall in September
Beaverton, OR

Average snowfall in September - Beaverton, OR
  • Average snowfall in September: 0mm

The month with the highest snowfall is February (41mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).

[Resources]

Average snowfall days in September
Beaverton, OR

Average snowfall days in September - Beaverton, OR
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (2.2 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

[Resources]

Average daylight in September /
Average sunshine in September
Beaverton, OR

Average daylight in September / Average sunshine in September - Beaverton, OR
  • Average daylight in September: 12.5h

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 September: 9.2h

The month with the most sunshine is August (Average sunshine: 10.9h).
The month with the least sunshine is February (Average sunshine: 3.9h).

[Resources]

Average sunshine days in September
Beaverton, OR

Average sunshine days in September - Beaverton, OR
  • Average sunshine days in September: 17.9 days

The month with the most sunshine days is July (24.9 days).
The month with the least sunshine days is March (8.6 days).

[Resources]

Average UV index in September
Beaverton, OR

Average UV index in September - Beaverton, 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).

[Resources]

Average cloud cover in September
Beaverton, OR

Average cloud cover in September - Beaverton, OR
  • Average cloud cover in September: 33

The month with the most cloud cover is February (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 23).

[Resources]

Average visibility in September
Beaverton, OR

Average visibility in September - Beaverton, OR
  • Average visibility in September: 9km

The months with the highest visibility are July, August and September (9km).
The months with the lowest visibility are January, February, March, April, May, June, October, November and December (8km).

[Resources]

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location
* you will be automatically redirected to the weather forecast for your location