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 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
In September, Coronado's weather conditions record an average high-temperature of a still warm 75.2°F (24°C), demonstrating little divergence from the preceding month. During the nights in September, Coronado experiences a consistent average temperature of 65.3°F (18.5°C).Humidity
In Coronado, the average relative humidity in September is 70%.Rainfall
In Coronado, in September, during 3.7 rainfall days, 0.31" (8mm) of precipitation is typically accumulated. In Coronado, during the entire year, the rain falls for 64.5 days and collects up to 9.02" (229mm) of precipitation.Ocean temperature
In Coronado, the average seawater temperature in September is 66.7°F (19.3°C).Note: In 66.7°F (19.3°C), swimming is not an enjoyable activity for most. The challenge of managing one's breathing increases as the temperature goes under 69.8°F (21°C).
Daylight
In September, the average length of the day is 12h and 22min.On the first day of September, sunrise is at 6:24 am and sunset at 7:12 pm. On the last day of the month, sunrise is at 6:42 am and sunset at 6:34 pm PDT.
Sunshine
In Coronado, the average sunshine in September is 10.3h.UV index
July through September, with an average maximum UV index of 6, are months with the highest UV index in Coronado. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for average individuals.Note: The daily high UV index of 6 during September translates into the following recommendations:
Elude overexposure. Fair-skinned people could get burnt in less than 20 minutes. Attempt to stay under shade and limit exposure to the Sun between 10 a.m. and 4 p.m., when UV radiation is at its peak. Remember, devices such as parasols or canopies might not provide complete sun protection. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature?
What is the average humidity in September?
How many days does it rain in September?
How cold is the water in September?
How many hours of daylight does Coronado have in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Coronado have in September?
When is the highest UV index?
What is the UV index reading in September?
Average temperature in September
Coronado, CA
- Average high temperature in September: 75.2°F
The warmest month (with the highest average high temperature) is August (75.6°F).
The months with the lowest average high temperature are February and December (63°F).
- Average low temperature in September: 65.3°F
The month with the highest average low temperature is August (65.5°F).
The coldest month (with the lowest average low temperature) is February (53.1°F).
Average pressure in September
Coronado, 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
Coronado, CA
- Average wind speed in September: 5.8mph
The windiest month (with the highest average wind speed) is April (6.7mph).
The calmest month (with the lowest average wind speed) is October (5.5mph).
Average humidity in September
Coronado, CA
- Average humidity in September: 70%
The month with the highest relative humidity is June (76%).
The months with the lowest relative humidity are January and November (61%).
Average rainfall in September
Coronado, CA
- Average rainfall in September: 0.31"
The wettest month (with the highest rainfall) is December (1.81").
The driest month (with the least rainfall) is June (0.08").
Average rainfall days in September
Coronado, CA
- Average rainfall days in September: 3.7 days
The month with the highest number of rainy days is March (8.4 days).
The month with the least rainy days is June (2.8 days).
Average sea temperature in September
Coronado, CA
- Average sea temperature in September: 66.7°F
The best month for swimming (with the highest average sea temperature) is August (67.9°F).
The coldest month (with the lowest average sea temperature) is February (58.7°F).
Average daylight in September /
Average sunshine in September
Coronado, 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 0min).
- Average sunshine in September: 10h and 2min
The months with the most sunshine are July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).
Average sunshine days in September
Coronado, CA
- Average sunshine days in September: 23.9 days
The month with the most sunshine days is August (24.8 days).
The month with the least sunshine days is February (20.1 days).
Average UV index in September
Coronado, 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
Coronado, CA
- Average cloud cover in September: 12
The months with the most cloud cover are March, May and December (Cloud cover 24).
The month with the least cloud cover is August (Cloud cover 9).
Average visibility in September
Coronado, 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).
Coronado, California, USA
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