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 signifies a minor shift to an average high-temperature of a still warm 82.6°F (28.1°C), aligning closely with August. In Vernon, September's nights observe an average temperature dip to a refreshing 64.4°F (18°C).Heat index
For September, the heat index is appraised at 84.2°F (29°C). Unrelenting activity during exposure could cause fatigue and potentially lead to heat cramps.Research indicates the heat index considers values in shaded locales and with light winds. The heat index could experience an increase of 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'feels like' or 'apparent temperature', determines the feeling of heat when you account for the relative humidity. 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. Should you be directly under the sun, anticipate a possible increase in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.
Humidity
The average relative humidity in September in Vernon is 57%.Rainfall
In September, in Vernon, the rain falls for 2.5 days. Throughout September, 0.16" (4mm) of precipitation is accumulated. Throughout the year, 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
The average sunshine in September in Vernon 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 value of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for average individuals.Note: In September, the maximum UV index of 6 suggests this advice:
Beware of overexposure. Fair-skinned individuals risk burning in less than 20 minutes. Avoid direct exposure to the Sun between 10 a.m. and 4 p.m., the peak period for UV radiation, noting that objects like parasols or canopies might not offer complete sun protection. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Frequently asked questions
Is it hot in Vernon during September?
What is the average humidity in September in Vernon?
How much does it rain in Vernon in September?
What is the average length of the day in September in Vernon?
What time are sunrise and sunset in September in Vernon?
How long on average sun shines in September in Vernon?
What are the months with the highest UV index in Vernon?
What is the UV index intensity in September in Vernon?
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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