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 arrival of September brings an average high-temperature of a still warm 82.8°F (28.2°C), closely following the temperature pattern of August. Benicia experiences a substantial decline from the daytime high temperatures in September, settling on an average low of 57.6°F (14.2°C).Heat index
September's mean heat index is estimated at 84.2°F (29°C). Exposure and extended activity could potentially cause a state of fatigue and lead to heat cramps.Remember that heat index calculations are made for conditions in the shade with light wind. Exposure to direct sunlight may make the heat index values climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', takes into account both air temperature and humidity to illustrate what people actually feel. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. When you're directly under the sun's rays, remember that the heat index may surge by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.
Humidity
September and October, with an average relative humidity of 56%, are the least humid months in Benicia, California.Rainfall
In September, the rain falls for 2 days. Throughout September, 0.08" (2mm) of precipitation is accumulated. Throughout the year, there are 48.9 rainfall days, and 4.96" (126mm) of precipitation is accumulated.Daylight
In Benicia, California, the average length of the day in September is 12h and 25min.On the first day of September, sunrise is at 6:39 am and sunset at 7:37 pm. On the last day of the month, sunrise is at 7:04 am and sunset at 6:52 pm PDT.
Sunshine
The average sunshine in September is 11.1h.UV index
The average daily maximum UV index in September in Benicia is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.Note: A maximum high UV index of 5 in September translates into the following recommendations:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. Stay sun-safe with clothing that is both closely woven and worn loosely.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in Benicia in September?
What is the least humid month in Benicia?
What is the average humidity in September in Benicia?
How many days does it rain in September in Benicia?
What is the average length of the day in September in Benicia?
When is the sunrise / sunset in September in Benicia?
How many hours of sunshine does Benicia have in September?
What is the UV index reading in September in Benicia?
Average temperature in September
Benicia, CA
- Average high temperature in September: 82.8°F
The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is December (55.4°F).
- Average low temperature in September: 57.6°F
The month with the highest average low temperature is September (57.6°F).
The coldest months (with the lowest average low temperature) are January and December (42.3°F).
Average pressure in September
Benicia, CA
- Average pressure in September: 29.92"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Benicia, CA
- Average wind speed in September: 5.8mph
The windiest month (with the highest average wind speed) is May (7.4mph).
The calmest month (with the lowest average wind speed) is November (4.5mph).
Average humidity in September
Benicia, CA
- Average humidity in September: 56%
The month with the highest relative humidity is March (74%).
The months with the lowest relative humidity are September and October (56%).
Average rainfall in September
Benicia, CA
- Average rainfall in September: 0.08"
The wettest month (with the highest rainfall) is February (0.98").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in September
Benicia, CA
- Average rainfall days in September: 2 days
The month with the highest number of rainy days is March (8.3 days).
The month with the least rainy days is August (1 days).
Average daylight in September /
Average sunshine in September
Benicia, CA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in September: 11h and 1min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in September
Benicia, CA
- Average sunshine days in September: 27.6 days
The month with the most sunshine days is July (29 days).
The months with the least sunshine days are February and March (22.1 days).
Average UV index in September
Benicia, CA
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in September
Benicia, CA
- Average cloud cover in September: 10
The months with the most cloud cover are March and December (Cloud cover 36).
The month with the least cloud cover is July (Cloud cover 7).
Average visibility in September
Benicia, 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).
Benicia, California, USA
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