September weather forecastHidden Hills, CA
September
Weather in September
September, the first month of the autumn in Hidden Hills, is still a warm month, with an average temperature ranging between max 79.5°F (26.4°C) and min 63.5°F (17.5°C).Temperature
The transition into September is marked with an average high-temperature of a still moderately hot 79.5°F (26.4°C), showing an insignificant shift from August's 81.1°F (27.3°C). Throughout September, the temperature in Hidden Hills falls to an average low of 63.5°F (17.5°C).Humidity
In Hidden Hills, the average relative humidity in September is 59%.Rainfall
In Hidden Hills, during September, the rain falls for 2.5 days and regularly aggregates up to 0.16" (4mm) of precipitation. Throughout the year, there are 49.2 rainfall days, and 9.09" (231mm) of precipitation is accumulated.Daylight
In Hidden Hills, the average length of the day in September is 12h and 22min.On the first day of September in Hidden Hills, sunrise is at 6:28 am and sunset at 7:20 pm. On the last day of the month, sunrise is at 6:48 am and sunset at 6:39 pm PDT.
Sunshine
The average sunshine in September in Hidden Hills is 10.9h.UV index
The months with the highest UV index are June through September, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for the ordinary person.Note: In September, the maximum UV index of 6 transforms into these recommendations:
Eschew overexposure. Those with light skin may suffer burns in fewer than 20 minutes. Limit your exposure to the sun's UV radiation, which is strongest between 10 a.m. and 4 p.m., and note that parasols or canopies may not provide full sun protection. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Hidden Hills, CA
- Average high temperature in September: 79.5°F
The warmest month (with the highest average high temperature) is August (81.1°F).
The month with the lowest average high temperature is December (61.7°F).
- Average low temperature in September: 63.5°F
The month with the highest average low temperature is August (64.6°F).
The coldest months (with the lowest average low temperature) are February and December (49.1°F).
Average pressure in September
Hidden Hills, CA
- Average pressure in September: 29.9"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The months with the lowest atmospheric pressure are June and September (29.9"Hg).
Average wind speed in September
Hidden Hills, CA
- Average wind speed in September: 4.6mph
The windiest months (with the highest average wind speed) are April and December (6.2mph).
The calmest month (with the lowest average wind speed) is August (4.5mph).
Average humidity in September
Hidden Hills, CA
- Average humidity in September: 59%
The month with the highest relative humidity is June (67%).
The month with the lowest relative humidity is November (51%).
Average rainfall in September
Hidden Hills, CA
- Average rainfall in September: 0.16"
The wettest month (with the highest rainfall) is February (1.97").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in September
Hidden Hills, CA
- Average rainfall days in September: 2.5 days
The month with the highest number of rainy days is March (6.8 days).
The month with the least rainy days is August (1.2 days).
Average daylight in September /
Average sunshine in September
Hidden Hills, 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 6min).
The months with the least sunshine are January, February and December (Average sunshine: 6h and 48min).
Average sunshine days in September
Hidden Hills, CA
- Average sunshine days in September: 25.2 days
The month with the most sunshine days is August (28.3 days).
The month with the least sunshine days is February (21.2 days).
Average UV index in September
Hidden Hills, 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, March, November and December (UV index 4).
Average cloud cover in September
Hidden Hills, 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
Hidden Hills, 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).
