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 sea temperature 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
The advent of September in Port Townsend signifies a minor shift to an average high-temperature of a still comfortable 63.1°F (17.3°C), aligning closely with August. The average low-temperature of 52.7°F (11.5°C) is witnessed in Port Townsend during September.Humidity
In September, the average relative humidity in Port Townsend, Washington, is 79%.Rainfall
In September, in Port Townsend, the rain falls for 12.5 days. Throughout September, 1.5" (38mm) of precipitation is accumulated. Throughout the year, there are 180.3 rainfall days, and 21.85" (555mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall in Port Townsend.Ocean temperature
August and September, with an average ocean temperature of 53.1°F (11.7°C), are months with the warmest seawater.Note: Entering waters of 53.1°F (11.7°C) is life-endangering. A mere moment in 55.4°F (13°C) waters feels piercing cold, and below 50°F (10°C) it can lead to immediate cold shock and cessation of breathing control, depending on body resilience.
Daylight
In Port Townsend, the average length of the day in September is 12h and 33min.On the first day of the month, sunrise is at 6:30 am and sunset at 7:51 pm. On the last day of September, sunrise is at 7:10 am and sunset at 6:51 pm PDT.
Sunshine
The average sunshine in September in Port Townsend is 9.5h.UV index
In September, the average daily maximum UV index in Port Townsend, Washington, is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the average person.Note: The maximum daily UV index, 4 in September, converts into the following recommendations:
Preventative actions are necessary - Recommendations to ward off sunburn are given. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. Enhance your sun protection with tightly woven, yet airy clothing.
Frequently asked questions
What are September temperatures in Port Townsend?
What is the average humidity in September in Port Townsend?
How much does it rain in Port Townsend in September?
When it does not snow in Port Townsend?
What months are the ocean warmest in Port Townsend?
What is the ocean temperature in September in Port Townsend?
What is the average length of the day in September in Port Townsend?
When are sunrise and sunset in September in Port Townsend?
How long on average sun shines in September in Port Townsend?
What is the UV index reading in September in Port Townsend?
Average temperature in September
Port Townsend, WA
- Average high temperature in September: 63.1°F
The warmest month (with the highest average high temperature) is August (67.8°F).
The month with the lowest average high temperature is December (43°F).
- Average low temperature in September: 52.7°F
The month with the highest average low temperature is August (55.4°F).
The coldest month (with the lowest average low temperature) is February (37.4°F).
Average pressure in September
Port Townsend, WA
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.08"Hg).
The months with the lowest atmospheric pressure are March and September (30.01"Hg).
Average wind speed in September
Port Townsend, WA
- Average wind speed in September: 4.3mph
The windiest month (with the highest average wind speed) is November (7.4mph).
The calmest month (with the lowest average wind speed) is August (4mph).
Average humidity in September
Port Townsend, WA
- Average humidity in September: 79%
The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is July (75%).
Average rainfall in September
Port Townsend, WA
- Average rainfall in September: 1.5"
The wettest month (with the highest rainfall) is November (2.91").
The driest month (with the least rainfall) is July (0.43").
Average rainfall days in September
Port Townsend, WA
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is March (20.7 days).
The month with the least rainy days is August (6.6 days).
Average snowfall in September
Port Townsend, WA
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.87").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Port Townsend, WA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in September
Port Townsend, WA
- Average sea temperature in September: 52.9°F
The best month for swimming (with the highest average sea temperature) is August (53°F).
The coldest month (with the lowest average sea temperature) is February (45°F).
Average daylight in September /
Average sunshine in September
Port Townsend, WA
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in September: 9h and 3min
The month with the most sunshine is August (Average sunshine: 11h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).
Average sunshine days in September
Port Townsend, WA
- Average sunshine days in September: 15.6 days
The month with the most sunshine days is August (22.3 days).
The month with the least sunshine days is March (8.2 days).
Average UV index in September
Port Townsend, 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
Port Townsend, WA
- Average cloud cover in September: 30
The months with the most cloud cover are January, February and December (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 21).
Average visibility in September
Port Townsend, WA
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Port Townsend, Washington, USA
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