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 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
In September, Los Serranos experiences a barely noticeable shift in meteorological conditions, with average high-temperatures moving from 91°F (32.8°C) in August to a still tropical 88.3°F (31.3°C). With the onset of night in September, Los Serranos reveals a significant decrease in temperature, averaging at a refreshing 64.4°F (18°C).Heat index
For September, the heat index is appraised at a tropical 91.4°F (33°C). Adopt special protective actions against heat exhaustion and heat cramps. Long-duration activity risks heatstroke.One should be cognizant that the heat index values are tailored for shaded spots and mild winds. Heat index values might soar by up to 15 Fahrenheit (8 Celsius) degrees with exposure to direct sunshine.
Note: The heat index, also known as 'feels like' or 'real feel', is a composite of temperature and humidity figures to convey how warm it feels. A person's impression of weather can be shaped by several aspects, among them metabolic variations, pregnancy, and levels of physical activity. When you're directly under the sun's rays, remember that the heat index may surge by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it's vital to remain hydrated, particularly during prolonged physical activities.
Humidity
In September, the average relative humidity is 47%.Rainfall
In Los Serranos, during September, the rain falls for 1.2 days and regularly aggregates up to 0.04" (1mm) of precipitation. Throughout the year, there are 36.5 rainfall days, and 3.15" (80mm) of precipitation is accumulated.Daylight
The average length of the day in September is 12h and 22min.On the first day of September in Los Serranos, sunrise is at 6:25 am and sunset at 7:16 pm. On the last day of the month, sunrise is at 6:45 am and sunset at 6:35 pm PDT.
Sunshine
The average sunshine in September is 10.7h.UV index
In September, the average daily maximum UV index is 6. A UV Index estimate of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: In September, the UV index of 6 transforms into the following advice:
Persist in precautions and follow sun safety policies. Keeping sunburn at bay is imperative. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot during September?
What is the average humidity in September?
How much does it rain in September?
How many hours of daylight does Los Serranos have in September?
When are sunrise and sunset in September?
How many hours of sunshine does Los Serranos have in September?
What is the UV index intensity in September?
Average temperature in September
Los Serranos, CA
- Average high temperature in September: 88.3°F
The warmest month (with the highest average high temperature) is August (91°F).
The month with the lowest average high temperature is December (64.4°F).
- Average low temperature in September: 64.4°F
The month with the highest average low temperature is August (66.6°F).
The coldest month (with the lowest average low temperature) is February (47.3°F).
Average pressure in September
Los Serranos, CA
- Average pressure in September: 29.88"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in September
Los Serranos, CA
- Average wind speed in September: 4.5mph
The windiest month (with the highest average wind speed) is May (5.7mph).
The calmest month (with the lowest average wind speed) is September (4.5mph).
Average humidity in September
Los Serranos, CA
- Average humidity in September: 47%
The month with the highest relative humidity is May (57%).
The month with the lowest relative humidity is November (45%).
Average rainfall in September
Los Serranos, CA
- Average rainfall in September: 0.04"
The wettest month (with the highest rainfall) is December (0.75").
The driest month (with the least rainfall) is June (0").
Average rainfall days in September
Los Serranos, CA
- Average rainfall days in September: 1.2 days
The month with the highest number of rainy days is March (6.3 days).
The month with the least rainy days is June (0.8 days).
Average daylight in September /
Average sunshine in September
Los Serranos, 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: 9h and 54min).
- Average sunshine in September: 10h and 4min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The months with the least sunshine are February and December (Average sunshine: 6h and 48min).
Average sunshine days in September
Los Serranos, CA
- Average sunshine days in September: 27.5 days
The month with the most sunshine days is August (28.8 days).
The month with the least sunshine days is February (22.8 days).
Average UV index in September
Los Serranos, CA
- Average UV index in September: 6
The months with the highest UV index are July and August (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 4).
Average cloud cover in September
Los Serranos, CA
- Average cloud cover in September: 7
The months with the most cloud cover are February, March and December (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in September
Los Serranos, 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).
Los Serranos, California, USA
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