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 brings an average high-temperature of a still moderately hot 77.7°F (25.4°C), almost identical to the preceding month. A striking difference from the daytime highs is registered during September nights, with an average temperature of 55°F (12.8°C).Humidity
The months with the lowest humidity are September and October, with an average relative humidity of 64%.Rainfall
In Day Valley, in September, it is raining for 2.7 days, with typically 0.12" (3mm) of accumulated precipitation. In Day Valley, California, during the entire year, the rain falls for 69.6 days and collects up to 12.09" (307mm) of precipitation.Daylight
In September, the average length of the day is 12h and 24min.On the first day of September, sunrise is at 6:38 am and sunset at 7:35 pm. On the last day of the month, sunrise is at 7:02 am and sunset at 6:51 pm PDT.
Sunshine
In Day Valley, the average sunshine in September is 11.2h.UV index
The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for the average person.Note: A typical high UV index of 5 in September suggests the following recommendations:
Prioritize safety - Recommendations to avert sunburn are shared. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September?
What are the least humid months?
What is the average humidity in September?
How much does it rain in September?
How many hours of daylight does Day Valley have in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Day Valley have in September?
What is the UV index intensity in September?
Average temperature in September
Day Valley, CA
- Average high temperature in September: 77.7°F
The warmest month (with the highest average high temperature) is August (78.8°F).
The month with the lowest average high temperature is December (56.3°F).
- Average low temperature in September: 55°F
The month with the highest average low temperature is September (55°F).
The coldest month (with the lowest average low temperature) is February (43°F).
Average pressure in September
Day Valley, CA
- Average pressure in September: 29.92"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is September (29.92"Hg).
Average wind speed in September
Day Valley, CA
- Average wind speed in September: 4.7mph
The windiest months (with the highest average wind speed) are April and May (6mph).
The calmest months (with the lowest average wind speed) are August, September, October and November (4.7mph).
Average humidity in September
Day Valley, CA
- Average humidity in September: 64%
The month with the highest relative humidity is March (75%).
The months with the lowest relative humidity are September and October (64%).
Average rainfall in September
Day Valley, CA
- Average rainfall in September: 0.12"
The wettest month (with the highest rainfall) is February (2.32").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in September
Day Valley, CA
- Average rainfall days in September: 2.7 days
The month with the highest number of rainy days is March (13.3 days).
The month with the least rainy days is August (1.1 days).
Average daylight in September /
Average sunshine in September
Day Valley, CA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in September: 11h and 1min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).
Average sunshine days in September
Day Valley, CA
- Average sunshine days in September: 26 days
The month with the most sunshine days is July (28.2 days).
The month with the least sunshine days is March (16.8 days).
Average UV index in September
Day Valley, CA
- Average UV index in September: 5
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in September
Day Valley, CA
- Average cloud cover in September: 10
The month with the most cloud cover is March (Cloud cover 34).
The month with the least cloud cover is July (Cloud cover 8).
Average visibility in September
Day Valley, 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).
Day Valley, California, USA
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