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
In September, the average high-temperature marginally drops from a moderately hot 79.7°F (26.5°C) in August to a pleasant 72.5°F (22.5°C). The average low-temperature, in Troutdale, Oregon, is 49.5°F (9.7°C).Humidity
The average relative humidity in September is 70%.Rainfall
In Troutdale, Oregon, during September, the rain falls for 10.1 days and regularly aggregates up to 1.89" (48mm) of precipitation. In Troutdale, during the entire year, the rain falls for 171 days and collects up to 37.2" (945mm) of precipitation.Snowfall
April through October are months without snowfall in Troutdale.Daylight
In September, the average length of the day in Troutdale is 12h and 31min.On the first day of September in Troutdale, sunrise is at 6:31 am and sunset at 7:48 pm. On the last day of the month, sunrise is at 7:06 am and sunset at 6:52 pm PDT.
Sunshine
In Troutdale, the average sunshine in September is 9.3h.UV index
The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: In September, 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 Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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.
FAQ
What is the temperature in September in Troutdale?
What is the average humidity in September in Troutdale?
How many days does it rain in September in Troutdale?
When it does not snow in Troutdale?
What is the average length of the day in September in Troutdale?
What time are sunrise and sunset in September in Troutdale?
How many hours of sunshine does Troutdale have in September?
How high is the UV index in September in Troutdale?
Average temperature in September
Troutdale, OR
- Average high temperature in September: 72.5°F
The warmest month (with the highest average high temperature) is August (79.7°F).
The month with the lowest average high temperature is December (43.3°F).
- Average low temperature in September: 49.5°F
The month with the highest average low temperature is August (52.7°F).
The coldest month (with the lowest average low temperature) is December (33.3°F).
Average pressure in September
Troutdale, OR
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).
Average wind speed in September
Troutdale, OR
- Average wind speed in September: 3.9mph
The windiest month (with the highest average wind speed) is January (6.8mph).
The calmest month (with the lowest average wind speed) is August (3.5mph).
Average humidity in September
Troutdale, OR
- Average humidity in September: 70%
The month with the highest relative humidity is February (84%).
The month with the lowest relative humidity is August (65%).
Average rainfall in September
Troutdale, OR
- Average rainfall in September: 1.89"
The wettest month (with the highest rainfall) is December (5.63").
The driest month (with the least rainfall) is July (0.31").
Average rainfall days in September
Troutdale, OR
- Average rainfall days in September: 10.1 days
The month with the highest number of rainy days is March (19.6 days).
The month with the least rainy days is August (4.1 days).
Average snowfall in September
Troutdale, OR
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.54").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Troutdale, 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
Troutdale, OR
- Average daylight in September: 12h and 31min
The month with the longest days is June (Average daylight: 15h and 38min).
The month with the shortest days is December (Average daylight: 8h and 46min).
- Average sunshine in September: 9h and 18min
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 6min).
Average sunshine days in September
Troutdale, OR
- Average sunshine days in September: 17.9 days
The month with the most sunshine days is August (25.3 days).
The month with the least sunshine days is February (8.6 days).
Average UV index in September
Troutdale, 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
Troutdale, OR
- Average cloud cover in September: 33
The month with the most cloud cover is February (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 24).
Average visibility in September
Troutdale, 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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