September weather forecastWarrendale, OR
September
Weather in September
September, the first month of the autumn in Warrendale, is still a refreshing month, with an average temperature fluctuating between 67.5°F (19.7°C) and 45.7°F (7.6°C).Temperature
The commencement of September involves a temperature shift, with the average high-temperature dropping from a moderately hot 76.5°F (24.7°C) in August to a refreshing 67.5°F (19.7°C). In Warrendale, September nights witness a remarkable decline from the day's zenith to a chilly 45.7°F (7.6°C).Humidity
In September, the average relative humidity is 72%.Rainfall
In Warrendale, in September, it is raining for 8.4 days, with typically 1.1" (28mm) of accumulated precipitation. Throughout the year, there are 158.4 rainfall days, and 30.31" (770mm) of precipitation is accumulated.Snowfall
In Warrendale, snow does not fall in April through October.Daylight
The average length of the day in September is 12h and 31min.On the first day of the month, sunrise is at 6:30 am and sunset at 7:45 pm. On the last day of September, sunrise is at 7:06 am and sunset at 6:49 pm PDT.
Sunshine
The average sunshine in September is 8.7h.UV index
In September, the average daily maximum UV index in Warrendale is 3. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for average individuals.Note: A daily high UV index of 3 in September leads to these guidelines:
Exercise caution. The susceptibility of light skin individuals to burns is less than 30 minutes. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Warrendale, OR
- Average high temperature in September: 67.5°F
The warmest month (with the highest average high temperature) is August (76.5°F).
The month with the lowest average high temperature is December (37.9°F).
- Average low temperature in September: 45.7°F
The month with the highest average low temperature is August (48.7°F).
The coldest month (with the lowest average low temperature) is December (28.2°F).
Average pressure in September
Warrendale, OR
- Average pressure in September: 30"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is August (29.98"Hg).
Average wind speed in September
Warrendale, OR
- Average wind speed in September: 4.5mph
The windiest month (with the highest average wind speed) is January (6.8mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).
Average humidity in September
Warrendale, OR
- Average humidity in September: 72%
The month with the highest relative humidity is February (89%).
The months with the lowest relative humidity are July and August (67%).
Average rainfall in September
Warrendale, OR
- Average rainfall in September: 1.1"
The wettest month (with the highest rainfall) is January (5.35").
The driest month (with the least rainfall) is July (0.28").
Average rainfall days in September
Warrendale, OR
- Average rainfall days in September: 8.4 days
The month with the highest number of rainy days is March (18.9 days).
The month with the least rainy days is July (4.4 days).
Average snowfall in September
Warrendale, OR
- Average snowfall in September: 0"
The month with the highest snowfall is January (3.62").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Warrendale, OR
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Warrendale, OR
- Average daylight in September: 12h and 30min
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: 8h and 42min
The months with the most sunshine are July and August (Average sunshine: 10h and 54min).
The month with the least sunshine is February (Average sunshine: 3h and 12min).
Average sunshine days in September
Warrendale, OR
- Average sunshine days in September: 20.1 days
The month with the most sunshine days is July (24.5 days).
The month with the least sunshine days is February (9.4 days).
Average UV index in September
Warrendale, OR
- Average UV index in September: 3
The months with the highest UV index are June and July (UV index 5).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in September
Warrendale, OR
- Average cloud cover in September: 39
The month with the most cloud cover is February (Cloud cover 68).
The months with the least cloud cover are July and August (Cloud cover 26).
Average visibility in September
Warrendale, OR
- Average visibility in September: 5mi
The months with the highest visibility are May, June, July, August, September and October (5mi).
The months with the lowest visibility are January, February, March, April, November and December (4mi).
