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 Brinnon, the average high-temperature in September gently drops from a warm 75.7°F (24.3°C) in August to an agreeable 68.9°F (20.5°C). Brinnon observes an average low-temperature of 50.9°F (10.5°C) during September nights.Humidity
The average relative humidity in September in Brinnon is 76%.Rainfall
In Brinnon, during September, the rain falls for 12.7 days and regularly aggregates up to 1.54" (39mm) of precipitation. Throughout the year, in Brinnon, Washington, there are 180.4 rainfall days, and 26.93" (684mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall in Brinnon.Daylight
In September, the average length of the day is 12h and 33min.On the first day of September in Brinnon, Washington, sunrise is at 6:31 am and sunset at 7:51 pm. On the last day of the month, sunrise is at 7:10 am and sunset at 6:52 pm PDT.
Sunshine
The average sunshine in September in Brinnon is 9.5h.UV index
In September, the average daily maximum UV index in Brinnon is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: In September, the UV index of 4 transforms into the following advice:
Put precautions into practice - Protective measures against sun-induced damage are advised. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Frequently asked questions
What are September temperatures in Brinnon?
What is the average humidity in September in Brinnon?
How many days does it rain in September in Brinnon?
When it does not snow in Brinnon?
How many hours of daylight does Brinnon have in September?
What time are sunrise and sunset in September in Brinnon?
How many hours of sunshine does Brinnon have in September?
How high is the UV index in September in Brinnon?
Average temperature in September
Brinnon, WA
- Average high temperature in September: 68.9°F
The warmest month (with the highest average high temperature) is August (75.7°F).
The month with the lowest average high temperature is December (42.8°F).
- Average low temperature in September: 50.9°F
The month with the highest average low temperature is August (54.1°F).
The coldest month (with the lowest average low temperature) is December (35.2°F).
Average pressure in September
Brinnon, WA
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The months with the lowest atmospheric pressure are March and September (30.01"Hg).
Average wind speed in September
Brinnon, WA
- Average wind speed in September: 3.8mph
The windiest month (with the highest average wind speed) is March (5.3mph).
The calmest months (with the lowest average wind speed) are July and August (3.2mph).
Average humidity in September
Brinnon, WA
- Average humidity in September: 76%
The month with the highest relative humidity is December (87%).
The month with the lowest relative humidity is July (70%).
Average rainfall in September
Brinnon, WA
- Average rainfall in September: 1.54"
The wettest month (with the highest rainfall) is January (4.33").
The driest month (with the least rainfall) is July (0.39").
Average rainfall days in September
Brinnon, WA
- Average rainfall days in September: 12.7 days
The month with the highest number of rainy days is March (20.1 days).
The month with the least rainy days is August (6.1 days).
Average snowfall in September
Brinnon, WA
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.4").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Brinnon, WA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.1 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
Brinnon, WA
- Average daylight in September: 12h and 3min
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 30min).
- Average sunshine in September: 9h and 3min
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 36min).
Average sunshine days in September
Brinnon, WA
- Average sunshine days in September: 14.7 days
The month with the most sunshine days is August (21.8 days).
The month with the least sunshine days is February (8.7 days).
Average UV index in September
Brinnon, WA
- 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
Brinnon, WA
- Average cloud cover in September: 31
The months with the most cloud cover are January and December (Cloud cover 53).
The month with the least cloud cover is August (Cloud cover 23).
Average visibility in September
Brinnon, WA
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February, November and December (5mi).
Brinnon, Washington, USA
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