September weather forecastChannel Islands Beach, CA
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Channel Islands Beach, California, with an average temperature ranging between min 63°F (17.2°C) and max 73.4°F (23°C).Temperature
Channel Islands Beach's temperatures tend to hit their maximum during August and September, with an average high-temperature of 73.4°F (23°C).Humidity
In September, the average relative humidity is 65%.Rainfall
In September, the rain falls for 3 days. Throughout September, 0.16" (4mm) of precipitation is accumulated. In Channel Islands Beach, during the entire year, the rain falls for 46.5 days and collects up to 8.31" (211mm) of precipitation.Ocean temperature
In September, the average ocean temperature is 63.3°F (17.4°C).Note: Most people do not find pleasure in swimming when the water temperature is 63.3°F (17.4°C). Breathing becomes increasingly difficult to manage as the water temperature drops from 69.8°F (21°C) to 59°F (15°C).
Daylight
The average length of the day in September is 12h and 22min.On the first day of September in Channel Islands Beach, sunrise is at 6:30 am and sunset at 7:22 pm. On the last day of the month, sunrise is at 6:51 am and sunset at 6:41 pm PDT.
Sunshine
The average sunshine in September is 10.9h.UV index
In Channel Islands Beach, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for average individuals.Note: The UV index of 5 during September translates into the following guidance:
Take precautions - Protection against skin and eye damage is obliged. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Channel Islands Beach, CA
- Average high temperature in September: 73.4°F
The warmest months (with the highest average high temperature) are August and September (73.4°F).
The month with the lowest average high temperature is February (59°F).
- Average low temperature in September: 63°F
The month with the highest average low temperature is September (63°F).
The coldest months (with the lowest average low temperature) are February and December (50.5°F).
Average pressure in September
Channel Islands Beach, CA
- Average pressure in September: 29.9"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is September (29.9"Hg).
Average wind speed in September
Channel Islands Beach, CA
- Average wind speed in September: 5.2mph
The windiest month (with the highest average wind speed) is April (7.3mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity in September
Channel Islands Beach, CA
- Average humidity in September: 65%
The month with the highest relative humidity is June (72%).
The month with the lowest relative humidity is November (57%).
Average rainfall in September
Channel Islands Beach, CA
- Average rainfall in September: 0.16"
The wettest month (with the highest rainfall) is January (1.85").
The driest month (with the least rainfall) is June (0.08").
Average rainfall days in September
Channel Islands Beach, CA
- Average rainfall days in September: 3 days
The month with the highest number of rainy days is March (7.3 days).
The month with the least rainy days is August (1.3 days).
Average sea temperature in September
Channel Islands Beach, CA
- Average sea temperature in September: 63.3°F
The best month for swimming (with the highest average sea temperature) is August (64.1°F).
The coldest month (with the lowest average sea temperature) is April (56.7°F).
Average daylight in September /
Average sunshine in September
Channel Islands Beach, CA
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in September: 10h and 54min
The months with the most sunshine are June, July and August (Average sunshine: 12h and 0min).
The months with the least sunshine are January and February (Average sunshine: 6h and 48min).
Average sunshine days in September
Channel Islands Beach, CA
- Average sunshine days in September: 24.1 days
The month with the most sunshine days is October (27.2 days).
The month with the least sunshine days is February (21.7 days).
Average UV index in September
Channel Islands Beach, CA
- Average UV index in September: 5
The month with the highest UV index is August (UV index 6).
The months with the lowest UV index are January, February, March, April, November and December (UV index 4).
Average cloud cover in September
Channel Islands Beach, CA
- Average cloud cover in September: 7
The month with the most cloud cover is March (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in September
Channel Islands 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).
