Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
September signals a slight drop in average high-temperature, sliding from August's 81.7°F (27.6°C) to a still warm 74.3°F (23.5°C). Despite the hot September days, Cedar Mill's nights see an average temperature plunge to a cool 52°F (11.1°C).Humidity
In Cedar Mill, the average relative humidity in September is 69%.Rainfall
In Cedar Mill, Oregon, in September, it is raining for 10.5 days, with typically 1.54" (39mm) of accumulated precipitation. In Cedar Mill, during the entire year, the rain falls for 173.2 days and collects up to 30.55" (776mm) of precipitation.Snowfall
April through October are months without snowfall.Daylight
In September, the average length of the day in Cedar Mill is 12h and 31min.On the first day of the month, sunrise is at 6:33 am and sunset at 7:48 pm. On the last day of September, in Cedar Mill, sunrise is at 7:09 am and sunset at 6:52 pm PDT.
Sunshine
In Cedar Mill, Oregon, the average sunshine in September is 9.2h.UV index
In September, the average daily maximum UV index in Cedar Mill is 4. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for average individuals.Note: A maximum daily UV index of 4 during September morphs into the following directions:
Take precautions - Protection against sun damage is advised. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. To cut down UV radiation exposure by about half, sport a wide-brim hat.
Frequently asked questions
What is the usual temperature for Cedar Mill in September?
What is the average humidity in September in Cedar Mill?
How many days does it rain in September in Cedar Mill?
When it does not snow in Cedar Mill?
How many hours of daylight does Cedar Mill have in September?
What time are sunrise and sunset in September in Cedar Mill?
How many hours of sunshine does Cedar Mill have in September?
How high is the UV index in September in Cedar Mill?
Average temperature in September
Cedar Mill, OR
- Average high temperature in September: 74.3°F
The warmest month (with the highest average high temperature) is August (81.7°F).
The month with the lowest average high temperature is December (44.2°F).
- Average low temperature in September: 52°F
The month with the highest average low temperature is August (55.6°F).
The coldest month (with the lowest average low temperature) is December (34.7°F).
Average pressure in September
Cedar Mill, 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).
Average wind speed in September
Cedar Mill, OR
- Average wind speed in September: 4.1mph
The windiest month (with the highest average wind speed) is January (5.4mph).
The calmest month (with the lowest average wind speed) is August (4mph).
Average humidity in September
Cedar Mill, 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%).
Average rainfall in September
Cedar Mill, OR
- Average rainfall in September: 1.54"
The wettest month (with the highest rainfall) is December (4.61").
The driest month (with the least rainfall) is July (0.31").
Average rainfall days in September
Cedar Mill, 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).
Average snowfall in September
Cedar Mill, OR
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.61").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Cedar Mill, 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).
Average daylight in September /
Average sunshine in September
Cedar Mill, OR
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in September: 9h and 1min
The month with the most sunshine is August (Average sunshine: 10h and 54min).
The month with the least sunshine is February (Average sunshine: 3h and 54min).
Average sunshine days in September
Cedar Mill, 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).
Average UV index in September
Cedar Mill, 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).
Average cloud cover in September
Cedar Mill, 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).
Average visibility in September
Cedar Mill, 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).
Cedar Mill, Oregon, USA
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