September weather forecastRolling Hills Estates, CA
September
Weather in September
September, the first month of the autumn in Rolling Hills Estates, is also a moderately hot month, with an average temperature fluctuating between 76.1°F (24.5°C) and 64.2°F (17.9°C).Temperature
Rolling Hills Estates sees the highest average temperatures during the months of August and September, peaking at 76.1°F (24.5°C).Humidity
In September, the average relative humidity is 68%.Rainfall
In Rolling Hills Estates, in September, it is raining for 3.9 days, with typically 0.28" (7mm) of accumulated precipitation. Throughout the year, there are 57.4 rainfall days, and 7.68" (195mm) of precipitation is accumulated.Daylight
The average length of the day in September is 12h and 22min.On the first day of September, sunrise is at 6:27 am and sunset at 7:18 pm. On the last day of the month, sunrise is at 6:47 am and sunset at 6:38 pm PDT.
Sunshine
In September, the average sunshine is 10.5h.UV index
July through September, with an average maximum UV index of 6, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum UV index of 6 during September translates into these guidelines:
Uphold preventive measures and conform to sun safety guidelines. Defending against skin and eye harm is crucial. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Rolling Hills Estates, CA
- Average high temperature in September: 76.1°F
The warmest months (with the highest average high temperature) are August and September (76.1°F).
The month with the lowest average high temperature is December (62.4°F).
- Average low temperature in September: 64.2°F
The month with the highest average low temperature is August (64.4°F).
The coldest month (with the lowest average low temperature) is February (52.5°F).
Average pressure in September
Rolling Hills Estates, CA
- Average pressure in September: 29.9"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are June and September (29.9"Hg).
Average wind speed in September
Rolling Hills Estates, CA
- Average wind speed in September: 5.3mph
The windiest month (with the highest average wind speed) is April (7mph).
The calmest month (with the lowest average wind speed) is September (5.3mph).
Average humidity in September
Rolling Hills Estates, CA
- Average humidity in September: 68%
The month with the highest relative humidity is June (75%).
The month with the lowest relative humidity is November (58%).
Average rainfall in September
Rolling Hills Estates, CA
- Average rainfall in September: 0.28"
The wettest month (with the highest rainfall) is January (1.46").
The driest month (with the least rainfall) is June (0.12").
Average rainfall days in September
Rolling Hills Estates, CA
- Average rainfall days in September: 3.9 days
The month with the highest number of rainy days is March (6.6 days).
The month with the least rainy days is August (3.3 days).
Average daylight in September /
Average sunshine in September
Rolling Hills Estates, 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: 10h and 0min).
- Average sunshine in September: 10h and 30min
The month with the most sunshine is August (Average sunshine: 11h and 54min).
The months with the least sunshine are January and December (Average sunshine: 6h and 42min).
Average sunshine days in September
Rolling Hills Estates, CA
- Average sunshine days in September: 21.4 days
The month with the most sunshine days is January (24.4 days).
The month with the least sunshine days is June (17.8 days).
Average UV index in September
Rolling Hills Estates, CA
- Average UV index in September: 6
The months with the highest UV index are July, August and September (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 4).
Average cloud cover in September
Rolling Hills Estates, CA
- Average cloud cover in September: 11
The month with the most cloud cover is December (Cloud cover 23).
The month with the least cloud cover is August (Cloud cover 9).
Average visibility in September
Rolling Hills Estates, 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).
