September weather forecastPhilomath, OR
September
Weather in September
The first month of the autumn, September, is also an agreeable month in Philomath, Oregon, with an average temperature varying between 72.3°F (22.4°C) and 48.4°F (9.1°C).Temperature
The start of September signals a gentle decrease in the average high-temperature, transitioning from a warm 79.7°F (26.5°C) in August to an agreeable 72.3°F (22.4°C). Philomath documents a substantial deviation from daytime highs with a consistent low-temperature of 48.4°F (9.1°C) during September nights.Humidity
The average relative humidity in September is 76%.Rainfall
In Philomath, in September, during 9.6 rainfall days, 1.46" (37mm) of precipitation is typically accumulated. In Philomath, during the entire year, the rain falls for 169.8 days and collects up to 34.02" (864mm) of precipitation.Snowfall
In Philomath, snow does not fall in April through October.Daylight
In Philomath, the average length of the day in September is 12h and 30min.On the first day of the month, sunrise is at 6:37 am and sunset at 7:49 pm. On the last day of September, sunrise is at 7:11 am and sunset at 6:55 pm PDT.
Sunshine
The average sunshine in September is 8.7h.UV index
The average daily maximum UV index in September in Philomath is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.Note: In September, the UV index of 4 transforms into the following advice:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. To avoid the Sun's strongest rays, limit exposure around the mid-day period. To cut down UV radiation exposure by about half, sport a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Philomath, OR
- Average high temperature in September: 72.3°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 (44.2°F).
- Average low temperature in September: 48.4°F
The month with the highest average low temperature is August (51.4°F).
The coldest month (with the lowest average low temperature) is December (33.6°F).
Average pressure in September
Philomath, 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
Philomath, OR
- Average wind speed in September: 3.8mph
The windiest months (with the highest average wind speed) are March and April (4.7mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).
Average humidity in September
Philomath, OR
- Average humidity in September: 76%
The month with the highest relative humidity is December (90%).
The months with the lowest relative humidity are July and August (71%).
Average rainfall in September
Philomath, OR
- Average rainfall in September: 1.46"
The wettest month (with the highest rainfall) is December (5.31").
The driest month (with the least rainfall) is July (0.24").
Average rainfall days in September
Philomath, OR
- Average rainfall days in September: 9.6 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
Philomath, OR
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.81").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Philomath, OR
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2 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
Philomath, OR
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in September: 8h and 42min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 3h and 18min).
Average sunshine days in September
Philomath, OR
- Average sunshine days in September: 18.4 days
The month with the most sunshine days is July (24.8 days).
The month with the least sunshine days is February (8.3 days).
Average UV index in September
Philomath, OR
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Philomath, OR
- Average cloud cover in September: 39
The month with the most cloud cover is February (Cloud cover 68).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in September
Philomath, OR
- Average visibility in September: 5mi
The months with the highest visibility are July, August and September (5mi).
The months with the lowest visibility are January, February, March, April, May, June, October, November and December (4mi).
