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 snowfall in September
- Average snowfall days in September
- Average sea temperature 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
Crescent City records a slight change with September's average high-temperatures adjusting to a refreshing 66.7°F (19.3°C) from August's 68°F (20°C). The nighttime temperature, during September, averages of 53.4°F (11.9°C).Humidity
With an average relative humidity of 76%, September is the least humid month.Rainfall
In September, in Crescent City, the rain falls for 5.5 days. Throughout September, 1.02" (26mm) of precipitation is accumulated. Throughout the year, there are 131.4 rainfall days, and 45.67" (1160mm) of precipitation is accumulated.Snowfall
Months with snowfall in Crescent City are February and September. September is the first month it typically snows. Throughout September, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow. Throughout the year, there are 0.4 snowfall days, and 0.47" (12mm) of snow is accumulated.Ocean temperature
In Crescent City, in September, the average water temperature is 52.3°F (11.3°C).Note: To swim in 52.3°F (11.3°C) at less than 50°F (10°C), ensure you're well-protected. Without it, be prepared for a sudden jolt of cold and breathing issues. Remember, even 55.4°F (13°C) is not welcoming.
Daylight
In Crescent City, the average length of the day in September is 12h and 28min.On the first day of the month, sunrise is at 6:43 am and sunset at 7:49 pm. On the last day of September, sunrise is at 7:13 am and sunset at 6:59 pm PDT.
Sunshine
The average sunshine in September is 10.2h.UV index
In Crescent City, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: The UV index of 4 during September leads to these advisories:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. When the Sun is at its strongest around midday, find shade and limit exposure. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in September?
What is the least humid month?
What is the average humidity in September in Crescent City?
How many days does it rain in September?
When does it start to snow?
What is the ocean temperature in September in Crescent City?
How many hours of daylight does Crescent City have in September?
When are sunrise and sunset in September?
How many hours of sunshine does Crescent City have in September?
How high is the UV index in September?
Average temperature in September
Crescent City, CA
- Average high temperature in September: 66.7°F
The warmest month (with the highest average high temperature) is August (68°F).
The month with the lowest average high temperature is December (51.3°F).
- Average low temperature in September: 53.4°F
The months with the highest average low temperature are July and August (54.1°F).
The coldest month (with the lowest average low temperature) is February (43.2°F).
Average pressure in September
Crescent City, CA
- Average pressure in September: 30"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is August (29.99"Hg).
Average wind speed in September
Crescent City, CA
- Average wind speed in September: 7.5mph
The windiest month (with the highest average wind speed) is June (9.9mph).
The calmest month (with the lowest average wind speed) is August (7.1mph).
Average humidity in September
Crescent City, CA
- Average humidity in September: 76%
The month with the highest relative humidity is March (81%).
The month with the lowest relative humidity is September (76%).
Average rainfall in September
Crescent City, CA
- Average rainfall in September: 1.02"
The wettest month (with the highest rainfall) is December (8.15").
The driest month (with the least rainfall) is July (0.12").
Average rainfall days in September
Crescent City, CA
- Average rainfall days in September: 5.5 days
The month with the highest number of rainy days is March (18.7 days).
The month with the least rainy days is July (2.4 days).
Average snowfall in September
Crescent City, CA
- Average snowfall in September: 0.04"
The month with the highest snowfall is February (0.43").
The months with the least snowfall are January, March, April, May, June, July, August, October, November and December (0").
Average snowfall days in September
Crescent City, CA
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (0.2 days).
The months with the least snowfall days are January, March, April, May, June, July, August, October and November (0 days).
Average sea temperature in September
Crescent City, CA
- Average sea temperature in September: 52.3°F
The best month for swimming (with the highest average sea temperature) is October (52.6°F).
The coldest month (with the lowest average sea temperature) is April (50.7°F).
Average daylight in September /
Average sunshine in September
Crescent City, CA
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 10h and 1min
The months with the most sunshine are July and August (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 5h and 0min).
Average sunshine days in September
Crescent City, CA
- Average sunshine days in September: 24 days
The month with the most sunshine days is July (27.8 days).
The month with the least sunshine days is March (10.8 days).
Average UV index in September
Crescent City, CA
- Average UV index in September: 4
The months with the highest UV index are July and August (UV index 5).
The month with the lowest UV index is February (UV index 2).
Average cloud cover in September
Crescent City, CA
- Average cloud cover in September: 17
The month with the most cloud cover is March (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 10).
Average visibility in September
Crescent City, 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).
Crescent City, California, USA
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