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 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 transitions into September recording an average high-temperature of a still moderately hot 78.8°F, closely aligning with the preceding month's temperature. An average low-temperature of 64.8°F is observed during September nights in Long Beach.Humidity
The average relative humidity in September is 63%.Rainfall
In Long Beach, California, during September, the rain falls for 3.3 days and regularly aggregates up to 0.24" of precipitation. Throughout the year, in Long Beach, there are 47.2 rainfall days, and 5.59" of precipitation is accumulated.Ocean temperature
In Long Beach, the average seawater temperature in September is 66.7°F.Note: In water of 66.7°F, the majority of people do not enjoy swimming. Breathing becomes increasingly hard to manage as the temperature drops from 69.8°F to 59°F.
Daylight
In September, the average length of the day is 12h and 22min.On the first day of the month, sunrise is at 6:26 am and sunset at 7:18 pm. On the last day of September, sunrise is at 6:46 am and sunset at 6:38 pm PDT.
Sunshine
The average sunshine in September in Long Beach is 10.6h.UV index
The months with the highest UV index in Long Beach are June through September, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for the ordinary person.Note: A maximum daily UV index of 6 during September morphs into the following directions:
Persist with precautions and heed sun safety advice. Prevention of sunburn is compulsory. Minimize exposure to direct sunlight and seek shade from 10 a.m. to 4 p.m., when UV radiation is most intense, but remember that shade structures may not offer complete protection. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
FAQ
What are September temperatures in Long Beach?
What is the average humidity in September in Long Beach?
How many days does it rain in September in Long Beach?
What is the ocean 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 long on average sun shines in September in Long Beach?
What is the month with the highest UV index in Long Beach?
What is the UV index intensity in September in Long Beach?
Average temperature in September
Long Beach, CA
- Average high temperature in September: 78.8°F
The warmest month (with the highest average high temperature) is August (79.5°F).
The month with the lowest average high temperature is December (63.5°F).
- Average low temperature in September: 64.8°F
The month with the highest average low temperature is August (64.9°F).
The coldest month (with the lowest average low temperature) is February (52°F).
Average pressure in September
Long Beach, CA
- Average pressure in September: 29.89"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are June and September (29.89"Hg).
Average wind speed in September
Long Beach, CA
- Average wind speed in September: 5mph
The windiest month (with the highest average wind speed) is April (6.5mph).
The calmest months (with the lowest average wind speed) are September and October (5mph).
Average humidity in September
Long Beach, CA
- Average humidity in September: 63%
The month with the highest relative humidity is June (71%).
The month with the lowest relative humidity is November (55%).
Average rainfall in September
Long Beach, CA
- Average rainfall in September: 0.24"
The wettest month (with the highest rainfall) is December (1.14").
The driest month (with the least rainfall) is June (0.08").
Average rainfall days in September
Long Beach, CA
- Average rainfall days in September: 3.3 days
The month with the highest number of rainy days is March (6 days).
The month with the least rainy days is June (1.8 days).
Average sea temperature in September
Long Beach, CA
- Average sea temperature in September: 66.7°F
The best months for swimming (with the highest average sea temperature) are July and August (67.9°F).
The coldest month (with the lowest average sea temperature) is January (58.3°F).
Average daylight in September /
Average sunshine in September
Long Beach, CA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in September: 10h and 4min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The months with the least sunshine are January, February and December (Average sunshine: 6h and 48min).
Average sunshine days in September
Long Beach, CA
- Average sunshine days in September: 22.7 days
The month with the most sunshine days is January (25.7 days).
The month with the least sunshine days is June (20.8 days).
Average UV index in September
Long Beach, CA
- Average UV index in September: 6
The months with the highest UV index are June, July, August and September (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 4).
Average cloud cover in September
Long Beach, CA
- Average cloud cover in September: 9
The months with the most cloud cover are March and December (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 7).
Average visibility in September
Long Beach, CA
- 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, California, USA
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