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
Entering September, Vernon's average high-temperature reads a still moderately hot 82.6°F (28.1°C), indicating a close resemblance to the previous month's climate. During September, Vernon experiences an average low-temperature of 64.4°F (18°C) at night.Heat index
September's mean heat index is computed to be 84.2°F (29°C). Prolonged exposure and physical activity might induce exhaustion, potentially causing heat cramps.The standards for the heat index are set for locations in shade and under light breezes. The heat index could see an increase by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is a numerical representation of warmth when taking temperature and moisture levels into account. The influence of weather is personal, differing among individuals based on variations in body mass, stature, and the degree of physical exertion. With the sun shining directly, it's crucial to understand that it can increase the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Children regularly disregard the necessity to rest and replenish fluids. Thirst is a late symptom of dehydration - thus, maintaining hydration, particularly during long-lasting physical activities, is essential.
Humidity
The average relative humidity in September is 57%.Rainfall
In Vernon, in September, it is raining for 2.5 days, with typically 0.16" (4mm) of accumulated precipitation. Throughout the year, in Vernon, there are 43.2 rainfall days, and 6.46" (164mm) of precipitation is accumulated.Daylight
In Vernon, the average length of the day in September is 12h and 22min.On the first day of September, 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 6:38 pm PDT.
Sunshine
In Vernon, California, the average sunshine in September is 10.6h.UV index
The months with the highest UV index are June through September, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for average individuals.Note: The daily high UV index of 6 during September translates into the following recommendations:
Avert overexposure. Light-skinned people might experience burning in less than 20 minutes. Try to minimize direct Sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Also note that objects like parasols or canopies might not provide complete sun protection. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.
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?
What is the average length of the day in September?
What time are sunrise and sunset in September?
How long on average sun shines in September in Vernon?
What is the month with the highest UV index?
How high is the UV index in September?
Average temperature in September
Vernon, 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
Vernon, 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
Vernon, 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
Vernon, 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
Vernon, 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
Vernon, 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
Vernon, 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
Vernon, 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
Vernon, 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
Vernon, 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
Vernon, 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).
Vernon, California, USA
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