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
September's onset sees an average high-temperature of a still moderately hot 84.2°F (29°C), exhibiting a slight fluctuation from the previous month. During the nights in September, East Whittier observes an average low-temperature of 65.1°F (18.4°C).Heat index
September's average heat index is estimated at a tropical 86°F (30°C). Uninterrupted exposure and activity might result in fatigue, potentially causing heat cramps.Thinking about the heat index, one should account for its values in shaded areas with gentle breezes. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', offers an insight into how hot it feels when we factor in moisture content. The individual's impression of temperature can be affected by numerous factors such as metabolic variations, physical exertion, and attire. Do note, being directly under sun rays can amplify the heat you feel, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Youths are typically more endangered than adults since they usually sweat less. Their larger skin surface concerning their smaller bodies and higher heat production due to activity further adds to their vulnerability.
Humidity
In East Whittier, the average relative humidity in September is 54%.Rainfall
In East Whittier, during September, the rain falls for 1.3 days and regularly aggregates up to 0.04" (1mm) of precipitation. In East Whittier, during the entire year, the rain falls for 27.3 days and collects up to 1.97" (50mm) of precipitation.Daylight
In East Whittier, the average length of the day in September is 12h and 22min.On the first day of September in East Whittier, sunrise is at 6:26 am and sunset at 7:17 pm. On the last day of the month, sunrise is at 6:46 am and sunset at 6:37 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 value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for the ordinary person.Note: During September, 6 as the daily maximum UV index converts into the following advice:
Take precautions against overexposure. Protection against sun damage is needed. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Frequently asked questions
How hot is September in East Whittier?
What is the average humidity in September in East Whittier?
How many days does it rain in September in East Whittier?
What is the average length of the day in September in East Whittier?
When are sunrise and sunset in September in East Whittier?
How long on average sun shines in September in East Whittier?
What is the UV index intensity in September in East Whittier?
Average temperature in September
East Whittier, CA
- Average high temperature in September: 84.2°F
The warmest month (with the highest average high temperature) is August (85.6°F).
The month with the lowest average high temperature is December (64.8°F).
- Average low temperature in September: 65.1°F
The month with the highest average low temperature is August (65.8°F).
The coldest month (with the lowest average low temperature) is February (49.8°F).
Average pressure in September
East Whittier, CA
- Average pressure in September: 29.89"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
East Whittier, CA
- Average wind speed in September: 4.7mph
The windiest month (with the highest average wind speed) is April (6mph).
The calmest months (with the lowest average wind speed) are September and October (4.7mph).
Average humidity in September
East Whittier, CA
- Average humidity in September: 54%
The month with the highest relative humidity is June (63%).
The month with the lowest relative humidity is November (48%).
Average rainfall in September
East Whittier, CA
- Average rainfall in September: 0.04"
The wettest month (with the highest rainfall) is December (0.47").
The driest month (with the least rainfall) is June (0").
Average rainfall days in September
East Whittier, CA
- Average rainfall days in September: 1.3 days
The month with the highest number of rainy days is March (4.6 days).
The month with the least rainy days is June (0.5 days).
Average daylight in September /
Average sunshine in September
East Whittier, 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 months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The months with the least sunshine are January, February and December (Average sunshine: 6h and 48min).
Average sunshine days in September
East Whittier, CA
- Average sunshine days in September: 27.6 days
The month with the most sunshine days is June (29.3 days).
The month with the least sunshine days is February (23.8 days).
Average UV index in September
East Whittier, CA
- Average UV index in September: 6
The month with the highest UV index is August (UV index 7).
The months with the lowest UV index are February, November and December (UV index 4).
Average cloud cover in September
East Whittier, CA
- Average cloud cover in September: 8
The months with the most cloud cover are March and December (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 6).
Average visibility in September
East Whittier, 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).
East Whittier, California, USA
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