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
The advent of September presents an average high-temperature of a still warm 82.6°F (28.1°C), maintaining a close correlation with the preceding month. September witnesses an average low-temperature hovering around an enjoyable 64.4°F (18°C).Heat index
The average heat index in September is calculated to be 84.2°F (29°C). Extended exposure and activity might lead to tiredness, potentially resulting in heat cramps.Records show heat index calculations are tailored for shaded regions and mild winds. The heat index could see an increase by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', blends air temperature and moisture content to represent the felt temperature to humans. An individual's perception of weather can be influenced by a variety of factors including metabolic differences, being pregnant, and their degree of physical exertion. Direct exposure to sun rays can potentially augment the heat sensation, elevating the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Young ones generally face higher dangers than adults since they sweat less. Along with their large skin surface area compared totheir small bodies and increased heat production from their activities, the risks are heightened.
Humidity
In Walnut Park, the average relative humidity in September is 57%.Rainfall
In Walnut Park, in September, during 2.5 rainfall days, 0.16" (4mm) of precipitation is typically accumulated. Throughout the year, in Walnut Park, there are 43.2 rainfall days, and 6.46" (164mm) of precipitation is accumulated.Daylight
In September, the average length of the day in Walnut Park is 12h and 22min.On the first day of September in Walnut Park, sunrise is at 6:27 am and sunset at 7:18 pm. On the last day of the month, sunrise is at 6:47 am and sunset at 6:37 pm PDT.
Sunshine
In September, the average sunshine is 10.6h.UV index
The months with the highest UV index in Walnut Park are June through September, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for the ordinary person.Note: The daily high UV index of 6 during September translates into the following recommendations:
Guard oneself from overexposure. Defence against sun injury is vital. Minimize exposure to direct sunlight and seek shade from 10 a.m. to 4 p.m., when UV radiation is most intense, but remember that shade structures may not offer complete protection. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
Frequently asked questions
How hot does it get in Walnut Park in September?
What is the average humidity in September in Walnut Park?
How many days does it rain in September in Walnut Park?
What is the average length of the day in September in Walnut Park?
What time are sunrise and sunset in September in Walnut Park?
How many hours of sunshine does Walnut Park have in September?
What is the month with the highest UV index in Walnut Park?
What is the UV index intensity in September in Walnut Park?
Average temperature in September
Walnut Park, CA
- Average high temperature in September: 82.6°F
The warmest month (with the highest average high temperature) is August (83.7°F).
The month with the lowest average high temperature is December (64.6°F).
- Average low temperature in September: 64.4°F
The month with the highest average low temperature is August (65.1°F).
The coldest month (with the lowest average low temperature) is February (50°F).
Average pressure in September
Walnut Park, CA
- Average pressure in September: 29.89"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are June and September (29.89"Hg).
Average wind speed in September
Walnut Park, CA
- Average wind speed in September: 4.8mph
The windiest month (with the highest average wind speed) is April (6.2mph).
The calmest month (with the lowest average wind speed) is October (4.7mph).
Average humidity in September
Walnut Park, CA
- Average humidity in September: 57%
The month with the highest relative humidity is June (65%).
The month with the lowest relative humidity is November (50%).
Average rainfall in September
Walnut Park, CA
- Average rainfall in September: 0.16"
The wettest month (with the highest rainfall) is February (1.34").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in September
Walnut Park, CA
- Average rainfall days in September: 2.5 days
The month with the highest number of rainy days is March (5.9 days).
The month with the least rainy days is June (1.3 days).
Average daylight in September /
Average sunshine in September
Walnut Park, 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 February and December (Average sunshine: 6h and 42min).
Average sunshine days in September
Walnut Park, CA
- Average sunshine days in September: 24.5 days
The month with the most sunshine days is August (26.8 days).
The month with the least sunshine days is February (21.8 days).
Average UV index in September
Walnut Park, 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
Walnut Park, CA
- Average cloud cover in September: 9
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
Walnut Park, 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).
Walnut Park, California, USA
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