September weather forecastTemecula, CA
September
Weather in September
September in Temecula presents a significant shift from the fierce summer to the cooler autumn season. Comparatively lower temperatures, especially in the nights, offer a refreshing break from the previous hot summer months. An increase in the cloud cover, creates a play of light and shadow under the autumn sky. Though September is drier compared to the upcoming October, it experiences a sudden increase in rainfall after the drier August. With the arrival of fall, residents witness a beautiful transformation in the weather offering a pleasant reprieve to all.Temperature
Temecula experiences a transition to a warm 85.1°F (29.5°C) in average high-temperatures with the arrival of September, not greatly differing from August's 87.4°F (30.8°C). A noticeable downturn in temperature characterizes the September nights in Temecula, averaging at a moderate 60.4°F (15.8°C).Heat index
The average heat index in September is evaluated at a hot 87.8°F (31°C). If one stays active during extended exposure, it might induce fatigue and result in heat cramps.Consider that heat index readings are for situations in the shade and light wind. The heat index may experience an enhancement of 15 Fahrenheit (8 Celsius) degrees under direct sunlight.
Note: The heat index, also known as 'feels like' or 'real feel', combines air temperature and relative humidity to represent a human perceived temperature equivalent. A person's impression of weather can be shaped by several aspects, among them metabolic variations, pregnancy, and levels of physical activity. 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. Young individuals usually face greater risks than adults as their sweat production is less. Also, their larger skin surface relative to their small bodies and the high heat generation due to their activity contributes to their vulnerability.
Humidity
The average relative humidity in September in Temecula, California, is 54%.Rainfall
In Temecula, in September, it is raining for 4.1 days, with typically 0.28" (7mm) of accumulated precipitation. In Temecula, during the entire year, the rain falls for 60.6 days and collects up to 9.37" (238mm) of precipitation.Daylight
In Temecula, the average length of the day in September is 12h and 22min.On the first day of the month, sunrise is at 6:23 am and sunset at 7:13 pm. On the last day of September, in Temecula, California, sunrise is at 6:42 am and sunset at 6:33 pm PDT.
Sunshine
In Temecula, California, the average sunshine in September is 10.5h.UV index
The average daily maximum UV index in September in Temecula, California, is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the average person.Note: In September, the maximum UV index of 5 transforms into these recommendations:
Heed the precautions - Suggestions to avoid sunburn are made. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Temecula, CA
- Average high temperature in September: 85.1°F
The warmest month (with the highest average high temperature) is August (87.4°F).
The month with the lowest average high temperature is December (61.7°F).
- Average low temperature in September: 60.4°F
The month with the highest average low temperature is August (62.2°F).
The coldest month (with the lowest average low temperature) is February (43.3°F).
Average pressure in September
Temecula, CA
- Average pressure in September: 29.87"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in September
Temecula, CA
- Average wind speed in September: 4.3mph
The windiest month (with the highest average wind speed) is April (5.5mph).
The calmest month (with the lowest average wind speed) is September (4.3mph).
Average humidity in September
Temecula, CA
- Average humidity in September: 54%
The month with the highest relative humidity is May (65%).
The month with the lowest relative humidity is November (52%).
Average rainfall in September
Temecula, CA
- Average rainfall in September: 0.28"
The wettest month (with the highest rainfall) is December (1.81").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in September
Temecula, CA
- Average rainfall days in September: 4.1 days
The month with the highest number of rainy days is March (8.2 days).
The month with the least rainy days is June (1.4 days).
Average daylight in September /
Average sunshine in September
Temecula, 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 30min
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 30min).
Average sunshine days in September
Temecula, CA
- Average sunshine days in September: 24 days
The month with the most sunshine days is June (26.5 days).
The month with the least sunshine days is February (20.8 days).
Average UV index in September
Temecula, CA
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in September
Temecula, CA
- Average cloud cover in September: 10
The month with the most cloud cover is March (Cloud cover 27).
The month with the least cloud cover is August (Cloud cover 7).
Average visibility in September
Temecula, 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).
