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
In Pacifica, the month of September is known for its highest average temperatures, reaching a high of 67.5°F (19.7°C) and a low of 56.8°F (13.8°C).Humidity
The average relative humidity in September in Pacifica, California, is 77%.Rainfall
June, July and September are months with the least rain in Pacifica when the rain falls for 3.6 days and typically aggregates up to 0.12" (3mm) of rain.Daylight
The average length of the day in September in Pacifica is 12h and 25min.On the first day of the month, sunrise is at 6:40 am and sunset at 7:38 pm. On the last day of September, in Pacifica, sunrise is at 7:05 am and sunset at 6:53 pm PDT.
Sunshine
In September, the average sunshine is 10.5h.UV index
The months with the highest UV index are June, August and September, with an average maximum UV index of 5. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.Note: The maximum daily UV index, 5 in September, converts into the following recommendations:
Adopt protective measures - Requirement to safeguard skin and eyes from harm exists. The Sun's radiation is especially intense around midday; try to stay in shade during this period. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Frequently asked questions
What time of the year is the hottest in Pacifica?
What is the temperature in September in Pacifica?
What is the average humidity in September in Pacifica?
What is the driest month in Pacifica?
How many days does it rain in September in Pacifica?
What is the average length of the day in September in Pacifica?
When are sunrise and sunset in September in Pacifica?
How many hours of sunshine does Pacifica have in September?
When is the highest UV index in Pacifica?
What is the UV index reading in September in Pacifica?
Average temperature in September
Pacifica, CA
- Average high temperature in September: 67.5°F
The warmest month (with the highest average high temperature) is September (67.5°F).
The month with the lowest average high temperature is December (55.6°F).
- Average low temperature in September: 56.8°F
The month with the highest average low temperature is September (56.8°F).
The coldest months (with the lowest average low temperature) are January and February (48.7°F).
Average pressure in September
Pacifica, 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
Pacifica, CA
- Average wind speed in September: 6.8mph
The windiest month (with the highest average wind speed) is April (9.4mph).
The calmest months (with the lowest average wind speed) are August and September (6.8mph).
Average humidity in September
Pacifica, CA
- Average humidity in September: 77%
The month with the highest relative humidity is August (82%).
The months with the lowest relative humidity are November and December (72%).
Average rainfall in September
Pacifica, CA
- Average rainfall in September: 0.12"
The wettest month (with the highest rainfall) is February (1.34").
The driest months (with the least rainfall) are June, July and September (0.12").
Average rainfall days in September
Pacifica, CA
- Average rainfall days in September: 3.6 days
The month with the highest number of rainy days is March (10.5 days).
The month with the least rainy days is September (3.6 days).
Average daylight in September /
Average sunshine in September
Pacifica, 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 36min).
- Average sunshine in September: 10h and 3min
The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in September
Pacifica, CA
- Average sunshine days in September: 22.6 days
The month with the most sunshine days is October (24.5 days).
The month with the least sunshine days is August (18.7 days).
Average UV index in September
Pacifica, CA
- Average UV index in September: 5
The months with the highest UV index are June, August and September (UV index 5).
The months with the lowest UV index are February and December (UV index 3).
Average cloud cover in September
Pacifica, CA
- Average cloud cover in September: 21
The month with the most cloud cover is March (Cloud cover 39).
The months with the least cloud cover are September and October (Cloud cover 21).
Average visibility in September
Pacifica, 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).
Pacifica, California, USA
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