September weather forecastCarmel-by-the-Sea, CA
September
Weather in September
In September, Carmel-by-the-Sea experiences a slight drop in maximum temperature to 69.6°F (20.9°C). This coincides with the start of the downward trend toward more fall-like weather conditions. However, the sunshine hours and daylight are still abundant, making it a pleasant time to visit the city. The sea temperature remains comfortable for swimming while the humidity levels begin to drop, resulting in cooler mornings and evenings.Temperature
With its high average temperature of 69.6°F (20.9°C) and a low of 55.4°F (13°C), September is regarded as the warmest month.Humidity
In September, the average relative humidity is 75%.Rainfall
In Carmel-by-the-Sea, in September, it is raining for 2.4 days, with typically 0.08" (2mm) of accumulated precipitation. Throughout the year, there are 70 rainfall days, and 11.93" (303mm) of precipitation is accumulated.Ocean temperature
The months with the warmest seawater are August and September, with an average ocean temperature of 58.1°F (14.5°C).Note: Dipping in 58.1°F (14.5°C) at temperatures less than 50°F (10°C) without proper gear can lead to pronounced cold shock and breathing difficulties.
Daylight
In Carmel-by-the-Sea, the average length of the day in September is 12h and 24min.On the first day of September, sunrise is at 6:39 am and sunset at 7:35 pm. On the last day of the month, sunrise is at 7:02 am and sunset at 6:52 pm PDT.
Sunshine
In Carmel-by-the-Sea, the average sunshine in September is 11h.UV index
June through September, with an average maximum UV index of 5, are months with the highest UV index. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: The average daily UV index of 5 in September transforms into the following instructions:
Be careful. Light complexion individuals might get burns in fewer than 30 minutes. To guard against the harmful effects of the Sun, minimize exposure during midday. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Carmel-by-the-Sea, CA
- Average high temperature in September: 69.6°F
The warmest month (with the highest average high temperature) is September (69.6°F).
The month with the lowest average high temperature is December (57°F).
- Average low temperature in September: 55.4°F
The month with the highest average low temperature is September (55.4°F).
The coldest month (with the lowest average low temperature) is December (46.9°F).
Average pressure in September
Carmel-by-the-Sea, CA
- Average pressure in September: 29.93"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.93"Hg).
Average wind speed in September
Carmel-by-the-Sea, CA
- Average wind speed in September: 6.3mph
The windiest month (with the highest average wind speed) is April (8.5mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in September
Carmel-by-the-Sea, CA
- Average humidity in September: 75%
The month with the highest relative humidity is August (79%).
The month with the lowest relative humidity is November (70%).
Average rainfall in September
Carmel-by-the-Sea, CA
- Average rainfall in September: 0.08"
The wettest month (with the highest rainfall) is December (2.48").
The driest month (with the least rainfall) is August (0.04").
Average rainfall days in September
Carmel-by-the-Sea, CA
- Average rainfall days in September: 2.4 days
The month with the highest number of rainy days is March (12.3 days).
The month with the least rainy days is August (1.3 days).
Average sea temperature in September
Carmel-by-the-Sea, CA
- Average sea temperature in September: 58.1°F
The best months for swimming (with the highest average sea temperature) are August and September (58.1°F).
The coldest month (with the lowest average sea temperature) is April (53.8°F).
Average daylight in September /
Average sunshine in September
Carmel-by-the-Sea, CA
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in September: 11h and 0min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).
Average sunshine days in September
Carmel-by-the-Sea, CA
- Average sunshine days in September: 26.8 days
The month with the most sunshine days is August (27.8 days).
The month with the least sunshine days is March (17.3 days).
Average UV index in September
Carmel-by-the-Sea, CA
- Average UV index in September: 5
The months with the highest UV index are June, July, August and September (UV index 5).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in September
Carmel-by-the-Sea, CA
- Average cloud cover in September: 15
The month with the most cloud cover is March (Cloud cover 35).
The month with the least cloud cover is July (Cloud cover 13).
Average visibility in September
Carmel-by-the-Sea, 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).
