September weather forecastQuail Valley, CA
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Quail Valley, California, with temperature in the range of an average low of 61.7°F (16.5°C) and an average high of 85.3°F (29.6°C).Temperature
With the advent of September, Quail Valley's high-temperatures adjust to a warm 85.3°F (29.6°C), closely aligning with the preceding month. Quail Valley undergoes a major shift from daytime highs, averaging a refreshing 61.7°F (16.5°C) during the night in September.Heat index
For September, the heat index is evaluated at a tropical 87.8°F (31°C). With ongoing exposure and activity, one might experience weariness, and heat cramps could ensue.Heat index guidelines indicate values are for light wind scenarios and shaded regions. Direct exposure to sunlight could raise the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is a metric representing the sensation of warmth when air temperature and moisture come together. The impact of weather is individual, with diverse individuals experiencing it differently due to variations in body mass, height, and activity levels. Given direct exposure to sunlight, one might experience a rise in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Children regularly disregard the necessity to rest and replenish fluids. Thirst is a late symptom of dehydration - thus, maintaining hydration, particularly during long-lasting physical activities, is essential.
Humidity
The average relative humidity in September is 51%.Rainfall
In Quail Valley, during September, the rain falls for 1.8 days and regularly aggregates up to 0.04" (1mm) of precipitation. In Quail Valley, during the entire year, the rain falls for 34.6 days and collects up to 2.56" (65mm) of precipitation.Daylight
In September, the average length of the day is 12h and 22min.On the first day of the month, sunrise is at 6:23 am and sunset at 7:14 pm. On the last day of September, in Quail Valley, sunrise is at 6:43 am and sunset at 6:34 pm PDT.
Sunshine
In September, the average sunshine is 10.6h.UV index
In September, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for the ordinary person.Note: The UV index of 6 during September leads to these advisories:
Elude overexposure. Fair-skinned people could get burnt in less than 20 minutes. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Quail Valley, CA
- Average high temperature in September: 85.3°F
The warmest month (with the highest average high temperature) is August (89.1°F).
The month with the lowest average high temperature is December (61.5°F).
- Average low temperature in September: 61.7°F
The month with the highest average low temperature is August (63.3°F).
The coldest month (with the lowest average low temperature) is December (43.7°F).
Average pressure in September
Quail Valley, CA
- Average pressure in September: 29.87"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in September
Quail Valley, CA
- Average wind speed in September: 4.1mph
The windiest month (with the highest average wind speed) is April (5.4mph).
The calmest months (with the lowest average wind speed) are August and September (4.1mph).
Average humidity in September
Quail Valley, CA
- Average humidity in September: 51%
The month with the highest relative humidity is May (62%).
The months with the lowest relative humidity are August and November (50%).
Average rainfall in September
Quail Valley, CA
- Average rainfall in September: 0.04"
The wettest month (with the highest rainfall) is February (0.55").
The driest month (with the least rainfall) is June (0").
Average rainfall days in September
Quail Valley, CA
- Average rainfall days in September: 1.8 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
Quail Valley, 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 36min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 36min).
Average sunshine days in September
Quail Valley, CA
- Average sunshine days in September: 26.6 days
The month with the most sunshine days is June (28.6 days).
The month with the least sunshine days is February (22.8 days).
Average UV index in September
Quail Valley, CA
- Average UV index in September: 6
The month with the highest UV index is August (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in September
Quail Valley, CA
- Average cloud cover in September: 8
The months with the most cloud cover are March and December (Cloud cover 24).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in September
Quail Valley, 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).
