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
As August turns into September, the average high-temperatures rest at a still moderately hot 77°F (25°C), showing a minor variation from the prior month. During the month of September, Imperial Beach experiences a steady low-temperature average of 65.7°F (18.7°C).Humidity
In September, the average relative humidity is 68%.Rainfall
In Imperial Beach, California, in September, it is raining for 4.4 days, with typically 0.31" (8mm) of accumulated precipitation. Throughout the year, in Imperial Beach, there are 61.2 rainfall days, and 7.32" (186mm) of precipitation is accumulated.Daylight
In September, the average length of the day in Imperial Beach is 12h and 22min.On the first day of the month, sunrise is at 6:23 am and sunset at 7:12 pm. On the last day of September, in Imperial Beach, sunrise is at 6:42 am and sunset at 6:33 pm PDT.
Sunshine
In Imperial Beach, the average sunshine in September is 10.2h.UV index
July through September, with an average maximum UV index of 6, are months with the highest UV index in Imperial Beach, California. A UV Index of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The UV index of 6 during September leads to these advisories:
Implement precautions and maintain sun safety methods. Avoidance of sunburn is demanded. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Imperial Beach in September?
What is the average humidity in September in Imperial Beach?
How many days does it rain in September in Imperial Beach?
What is the average length of the day in September in Imperial Beach?
When is the sunrise / sunset in September in Imperial Beach?
How many hours of sunshine does Imperial Beach have in September?
What are the months with the highest UV index in Imperial Beach?
What is the UV index reading in September in Imperial Beach?
Average temperature in September
Imperial Beach, CA
- Average high temperature in September: 77°F
The warmest month (with the highest average high temperature) is August (77.2°F).
The month with the lowest average high temperature is December (63.5°F).
- Average low temperature in September: 65.7°F
The month with the highest average low temperature is August (66.6°F).
The coldest month (with the lowest average low temperature) is February (52°F).
Average pressure in September
Imperial Beach, CA
- Average pressure in September: 29.88"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The months with the lowest atmospheric pressure are June and September (29.88"Hg).
Average wind speed in September
Imperial Beach, CA
- Average wind speed in September: 5.7mph
The windiest month (with the highest average wind speed) is April (6.6mph).
The calmest month (with the lowest average wind speed) is October (5.3mph).
Average humidity in September
Imperial Beach, CA
- Average humidity in September: 68%
The month with the highest relative humidity is June (73%).
The months with the lowest relative humidity are January and November (60%).
Average rainfall in September
Imperial Beach, CA
- Average rainfall in September: 0.31"
The wettest month (with the highest rainfall) is December (1.42").
The driest month (with the least rainfall) is June (0.12").
Average rainfall days in September
Imperial Beach, CA
- Average rainfall days in September: 4.4 days
The month with the highest number of rainy days is March (7.6 days).
The month with the least rainy days is June (2.5 days).
Average daylight in September /
Average sunshine in September
Imperial Beach, CA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 6min).
- Average sunshine in September: 10h and 1min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 6h and 36min).
Average sunshine days in September
Imperial Beach, CA
- Average sunshine days in September: 23.9 days
The month with the most sunshine days is June (26 days).
The month with the least sunshine days is February (20.3 days).
Average UV index in September
Imperial Beach, CA
- Average UV index in September: 6
The months with the highest UV index are July, August and September (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 4).
Average cloud cover in September
Imperial Beach, CA
- Average cloud cover in September: 13
The months with the most cloud cover are May and December (Cloud cover 25).
The month with the least cloud cover is August (Cloud cover 10).
Average visibility in September
Imperial Beach, 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).
Imperial Beach, California, USA
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