September weather forecastPacific, WA
September
Weather in September
The first month of the autumn, September, is also an agreeable month in Pacific, Washington, with an average temperature varying between 69.1°F (20.6°C) and 48.6°F (9.2°C).Temperature
The arrival of September correlates with a minor temperature reduction, down from August's moderately hot 76.5°F (24.7°C) to a pleasant 69.1°F (20.6°C). Throughout September nights, Pacific registers an average low-temperature of 48.6°F (9.2°C).Humidity
In Pacific, the average relative humidity in September is 74%.Rainfall
In Pacific, in September, it is raining for 11.8 days, with typically 1.02" (26mm) of accumulated precipitation. In Pacific, during the entire year, the rain falls for 162.5 days and collects up to 17.87" (454mm) of precipitation.Snowfall
May through October are months without snowfall.Daylight
The average length of the day in September in Pacific, Washington, is 12h and 32min.On the first day of the month, sunrise is at 6:29 am and sunset at 7:48 pm. On the last day of September, sunrise is at 7:07 am and sunset at 6:49 pm PDT.
Sunshine
In September, the average sunshine in Pacific is 9.3h.UV index
The average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the average person.Note: The average daily UV index of 4 in September transforms into the following instructions:
Act with care - Obligation to protect against skin and eye damage is highlighted. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Pacific, WA
- Average high temperature in September: 69.1°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 (41.9°F).
- Average low temperature in September: 48.6°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 (32.5°F).
Average pressure in September
Pacific, WA
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).
Average wind speed in September
Pacific, WA
- Average wind speed in September: 3.7mph
The windiest month (with the highest average wind speed) is January (4.9mph).
The calmest month (with the lowest average wind speed) is August (3.4mph).
Average humidity in September
Pacific, WA
- Average humidity in September: 74%
The months with the highest relative humidity are January, February and December (86%).
The month with the lowest relative humidity is July (69%).
Average rainfall in September
Pacific, WA
- Average rainfall in September: 1.02"
The wettest month (with the highest rainfall) is January (2.6").
The driest month (with the least rainfall) is July (0.39").
Average rainfall days in September
Pacific, WA
- Average rainfall days in September: 11.8 days
The month with the highest number of rainy days is November (17.5 days).
The month with the least rainy days is August (6.3 days).
Average snowfall in September
Pacific, WA
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.79").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Pacific, WA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.7 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
Pacific, WA
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in September: 9h and 18min
The month with the most sunshine is August (Average sunshine: 10h and 54min).
The months with the least sunshine are January and December (Average sunshine: 4h and 18min).
Average sunshine days in September
Pacific, WA
- Average sunshine days in September: 16.3 days
The month with the most sunshine days is August (21.8 days).
The month with the least sunshine days is February (10.3 days).
Average UV index in September
Pacific, WA
- Average UV index in September: 4
The month with the highest UV index is 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
Pacific, WA
- Average cloud cover in September: 35
The months with the most cloud cover are January and December (Cloud cover 56).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility in September
Pacific, WA
- Average visibility in September: 5mi
The months with the highest visibility are July and August (6mi).
The month with the lowest visibility is December (4mi).
