September weather forecastCarlton Hills, CA
September
Weather in September
September, the first month of the autumn in Carlton Hills, is still a warm month, with an average temperature varying between 82.8°F (28.2°C) and 63.7°F (17.6°C).Temperature
The transition into September notes an average high-temperature of a still moderately hot 82.8°F (28.2°C), revealing a mild distinction from the 84.7°F (29.3°C) in August. Carlton Hills, during September nights, observes an average temperature of 63.7°F (17.6°C).Heat index
September's average heat index is appraised at a hot 86°F (30°C). Prolonged exposure combined with continuous activity could lead to exhaustion, and possibly heat cramps.Take into consideration that the heat index values are calculated for shade and light wind conditions. Direct sunlight exposure may cause a 15 Fahrenheit (8 Celsius) degrees rise in the heat index.
Note: The heat index, also known as 'real feel' or 'apparent temperature', unifies temperature and humidity readings to offer a comprehensive feel of warmth. This effect is personal, influenced by the individual's physical activity and heat sensitivity, shaped by factors including wind, attire, and metabolic variations. 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 highly critical for babies and toddlers. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.
Humidity
In Carlton Hills, the average relative humidity in September is 59%.Rainfall
In Carlton Hills, in September, it is raining for 3.4 days, with typically 0.28" (7mm) of accumulated precipitation. Throughout the year, in Carlton Hills, California, there are 47.9 rainfall days, and 5.31" (135mm) of precipitation is accumulated.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 7:12 pm. On the last day of September, sunrise is at 6:41 am and sunset at 6:33 pm PDT.
Sunshine
The average sunshine in September in Carlton Hills is 10.4h.UV index
June through September, with an average maximum UV index of 6, are months with the highest UV index in Carlton Hills, California. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: The UV index of 6 during September leads to these advisories:
Stand by precautions and apply sun safety measures. Evading sunburn is of great importance. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. 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
Carlton Hills, CA
- Average high temperature in September: 82.8°F
The warmest month (with the highest average high temperature) is August (84.7°F).
The month with the lowest average high temperature is December (64°F).
- Average low temperature in September: 63.7°F
The month with the highest average low temperature is August (65.3°F).
The coldest month (with the lowest average low temperature) is February (46.9°F).
Average pressure in September
Carlton Hills, CA
- Average pressure in September: 29.87"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The months with the lowest atmospheric pressure are June and September (29.87"Hg).
Average wind speed in September
Carlton Hills, CA
- Average wind speed in September: 4.3mph
The windiest month (with the highest average wind speed) is April (5.4mph).
The calmest month (with the lowest average wind speed) is October (4.2mph).
Average humidity in September
Carlton Hills, CA
- Average humidity in September: 59%
The month with the highest relative humidity is May (66%).
The month with the lowest relative humidity is November (54%).
Average rainfall in September
Carlton Hills, CA
- Average rainfall in September: 0.28"
The wettest month (with the highest rainfall) is February (1.14").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in September
Carlton Hills, CA
- Average rainfall days in September: 3.4 days
The month with the highest number of rainy days is March (6.8 days).
The month with the least rainy days is June (1.4 days).
Average daylight in September /
Average sunshine in September
Carlton Hills, CA
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in September: 10h and 24min
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 42min).
Average sunshine days in September
Carlton Hills, CA
- Average sunshine days in September: 24.2 days
The month with the most sunshine days is June (28 days).
The month with the least sunshine days is February (22.3 days).
Average UV index in September
Carlton 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, November and December (UV index 4).
Average cloud cover in September
Carlton Hills, CA
- Average cloud cover in September: 10
The months with the most cloud cover are March and December (Cloud cover 23).
The month with the least cloud cover is August (Cloud cover 7).
Average visibility in September
Carlton 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).
