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
Chino Hills's weather in September displays an average high-temperature of a still tropical 86°F (30°C), showing minor disparity from August's 87.6°F (30.9°C). Chino Hills sees a large disparity in day to night temperatures in September, with the night temperature dropping to an average of 64.4°F (18°C).Heat index
The heat index value during September is calculated to be a hot 87.8°F (31°C). If exposure and ongoing activity persist, they might induce a state of tiredness and heat cramps.Heat index values are typically calculated for conditions of shade and a light breeze. When exposed to the direct sun, the heat index may augment by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', comes about by integrating the temperature readings with the humidity levels. The impact of temperature is individual, as people's perception of weather may change based on their body mass, height, and physical activity. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Kids frequently fail to realize the necessity for resting and hydrating. Thirst is an advanced indication of dehydration - hence, maintaining hydration, especially during extended physical activities, becomes essential.
Humidity
In September, the average relative humidity is 52%.Rainfall
In Chino Hills, California, in September, during 2 rainfall days, 0.08" (2mm) of precipitation is typically accumulated. In Chino Hills, during the entire year, the rain falls for 41.8 days and collects up to 2.8" (71mm) of precipitation.Daylight
The average length of the day in September is 12h and 22min.On the first day of the month, sunrise is at 6:25 am and sunset at 7:16 pm. On the last day of September, sunrise is at 6:45 am and sunset at 6:36 pm PDT.
Sunshine
In September, the average sunshine is 10.6h.UV index
In September, the average daily maximum UV index in Chino Hills is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: A maximum daily UV index of 6 during September morphs into the following directions:
Stick with precautions and abide by sun safety procedures. Evading sunburn is essential. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is September?
What is the average humidity in September?
How much does it rain in September?
How many hours of daylight does Chino Hills have in September?
When are sunrise and sunset in September?
How long on average sun shines in September?
How high is the UV index in September?
Average temperature in September
Chino Hills, CA
- Average high temperature in September: 86°F
The warmest month (with the highest average high temperature) is August (87.6°F).
The month with the lowest average high temperature is December (63.9°F).
- Average low temperature in September: 64.4°F
The month with the highest average low temperature is August (65.8°F).
The coldest months (with the lowest average low temperature) are February and December (48.4°F).
Average pressure in September
Chino Hills, 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
Chino Hills, CA
- Average wind speed in September: 4.3mph
The windiest months (with the highest average wind speed) are April and May (5.5mph).
The calmest month (with the lowest average wind speed) is September (4.3mph).
Average humidity in September
Chino Hills, CA
- Average humidity in September: 52%
The months with the highest relative humidity are May and June (60%).
The month with the lowest relative humidity is November (48%).
Average rainfall in September
Chino Hills, CA
- Average rainfall in September: 0.08"
The wettest month (with the highest rainfall) is December (0.51").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in September
Chino Hills, CA
- Average rainfall days in September: 2 days
The month with the highest number of rainy days is March (7.2 days).
The month with the least rainy days is June (0.9 days).
Average daylight in September /
Average sunshine in September
Chino Hills, 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 6min).
The month with the least sunshine is December (Average sunshine: 6h and 48min).
Average sunshine days in September
Chino Hills, CA
- Average sunshine days in September: 25.3 days
The month with the most sunshine days is June (27.3 days).
The month with the least sunshine days is February (21.8 days).
Average UV index in September
Chino Hills, 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 January, February, November and December (UV index 4).
Average cloud cover in September
Chino Hills, 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 5).
Average visibility in September
Chino 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).
Chino Hills, California, USA
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