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
Long Beach's entry into September measures an average high-temperature of a still enjoyable 62.6°F (17°C), closely parallel to the preceding month. Long Beach's September nights demonstrate minimal variation from the daytime temperatures, with an average of 55°F (12.8°C).Humidity
In September, the average relative humidity in Long Beach is 83%.Rainfall
In Long Beach, in September, during 9.9 rainfall days, 0.94" (24mm) of precipitation is typically accumulated. In Long Beach, during the entire year, the rain falls for 165.1 days and collects up to 19.92" (506mm) of precipitation.Snowfall
Months with snowfall in Long Beach are January, February and September. September is the first month it typically snows in Long Beach. Throughout September, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow. In Long Beach, Washington, during the entire year, snow falls for 1.8 days and aggregates up to 0.47" (12mm) of snow.Ocean temperature
In September, the average ocean temperature is 56.8°F (13.8°C).Note: With an efficient thermal swimsuit, one can navigate 56.8°F (13.8°C) even if it's colder than 50°F (10°C); otherwise, rapid cold shock and breathlessness might set in. Barely wading at 55.4°F (13°C) feels chilly.
Daylight
In September, the average length of the day is 12h and 32min.On the first day of September, sunrise is at 6:37 am and sunset at 7:54 pm. On the last day of the month, sunrise is at 7:14 am and sunset at 6:57 pm PDT.
Sunshine
The average sunshine in September in Long Beach is 8.7h.UV index
May through September, with an average maximum UV index of 4, are months with the highest UV index in Long Beach. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for average individuals.Note: The maximum UV index of 4 during September translates into these guidelines:
Undertake protective steps - Obligation to safeguard skin and eyes from harm is in place. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Long Beach?
What is the average humidity in September in Long Beach?
How many days does it rain in September in Long Beach?
When does it start to snow in Long Beach?
What is the water temperature in September in Long Beach?
What is the average length of the day in September in Long Beach?
When are sunrise and sunset in September in Long Beach?
How many hours of sunshine does Long Beach have in September?
When is the highest UV index in Long Beach?
What is the UV index reading in September in Long Beach?
Average temperature in September
Long Beach, WA
- Average high temperature in September: 62.6°F
The warmest month (with the highest average high temperature) is August (63.9°F).
The month with the lowest average high temperature is December (46.8°F).
- Average low temperature in September: 55°F
The month with the highest average low temperature is August (55.9°F).
The coldest month (with the lowest average low temperature) is December (41.5°F).
Average pressure in September
Long Beach, WA
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is July (30.08"Hg).
The month with the lowest atmospheric pressure is March (30.01"Hg).
Average wind speed in September
Long Beach, WA
- Average wind speed in September: 7.8mph
The windiest month (with the highest average wind speed) is January (11.9mph).
The calmest month (with the lowest average wind speed) is August (7.1mph).
Average humidity in September
Long Beach, WA
- Average humidity in September: 83%
The month with the highest relative humidity is August (86%).
The month with the lowest relative humidity is April (80%).
Average rainfall in September
Long Beach, WA
- Average rainfall in September: 0.94"
The wettest month (with the highest rainfall) is December (3.31").
The driest month (with the least rainfall) is July (0.35").
Average rainfall days in September
Long Beach, WA
- Average rainfall days in September: 9.9 days
The month with the highest number of rainy days is November (18.5 days).
The month with the least rainy days is August (6.7 days).
Average snowfall in September
Long Beach, WA
- Average snowfall in September: 0.04"
The month with the highest snowfall is February (0.31").
The months with the least snowfall are March, April, May, June, July, August, October, November and December (0").
Average snowfall days in September
Long Beach, WA
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (0.8 days).
The months with the least snowfall days are April, May, June, July, August and October (0 days).
Average sea temperature in September
Long Beach, WA
- Average sea temperature in September: 56.8°F
The best month for swimming (with the highest average sea temperature) is July (58.6°F).
The coldest month (with the lowest average sea temperature) is February (47.8°F).
Average daylight in September /
Average sunshine in September
Long Beach, WA
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is July (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in September
Long Beach, WA
- Average sunshine days in September: 17.1 days
The month with the most sunshine days is August (20.3 days).
The month with the least sunshine days is November (8.9 days).
Average UV index in September
Long Beach, WA
- Average UV index in September: 4
The months with the highest UV index are May, June, July, August and September (UV index 4).
The months with the lowest UV index are February, November and December (UV index 2).
Average cloud cover in September
Long Beach, WA
- Average cloud cover in September: 37
The month with the most cloud cover is January (Cloud cover 60).
The months with the least cloud cover are August and September (Cloud cover 37).
Average visibility in September
Long Beach, 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).
Long Beach, Washington, USA
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