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Best
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Sea
23°
Swim
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23°
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23°
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24°
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28°
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29°
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29°
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29°
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30°
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27°
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27°
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25°
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The weather in September is marginally cooler than the previous month and temperatures continue to drop slightly into October. September has average maximum temperatures of 31°C (88°F) which is very hot and perfect for sunbathing on clear days. The sunshine percentage is 62% making it sunny but overcast at times. The hours of sunshine per day are 7.6hrs making the days quite long and bright. It is a good time for sunbathing in Key West.
September has total rainfall of 21.7cm (8.5inches) making it quite rainy but mostly with moderate showers. There are 19 days with some rainfall so you can still enjoy the beach on the clear days.
Sea temperatures are a very warm 30°C (85°F). September is an excellent month for swimming in Key West with very comfortable temperatures for bathing all day. The sea temperature in September is slightly warmer than the previous month.
Consider visiting Key West in the months of March, April, May, December, for the best beach weather. Also consider one of our other suggestions for September.
Yes, September is a good time for sunbathing in Key West.
September has average maximum temperatures of 31°C (88°F) which is very hot and perfect for sunbathing on clear days. The sunshine percentage is 62% making it sunny but overcast at times. The hours of sunshine per day are 7.6hrs making the days quite long and bright. September has total rainfall of 21.7cm (8.5inches) making it quite rainy but mostly with moderate showers. There are 19 days with some rainfall so you can still enjoy the beach on the clear days.
More about September temperature and sunshine.
Yes, September is an excellent month for swimming in Key West with very warm sea temperatures 30°C (85°F).
More about September sea temperatures.
Yes, September is a good time for a holiday in Key West.
September has average maximum temperatures of 31°C (88°F) which is very hot and perfect for sunbathing on clear days. The sunshine percentage is 62% making it sunny but overcast at times. The hours of sunshine per day are 7.6hrs making the days quite long and bright. September has total rainfall of 21.7cm (8.5inches) making it quite rainy but mostly with moderate showers. There are 19 days with some rainfall so you can still enjoy the beach on the clear days. It is a good time for sunbathing in Key West. Sea temperatures are a very warm 30°C (85°F). September is an excellent month for swimming in Key West with very comfortable temperatures for bathing all day.
More about the September temperatures and sunshine.
Yes, Key West is very hot and perfect for sunbathing on clear days in September.
The average maximum temperature in Key West in September is 31°C (88°F). The average maximum temperature is 32°C (90°) in the previous month and 30°C (85°F) in the next month.
The average temperature in Key West in September is 29°C (83°F). The average temperature is 30°C (85°F) in the previous month and 27°C (81°F) in the next month.
More info about the September temperatures and sunshine.
The average day light hours per day in Key West in September are 12.3. The sunshine percentage is 62% making it sunny but overcast at times. The hours of sunshine per day are 7.6hrs making the days quite long and bright.
More about September sunshine.
The weather in September is marginally cooler than the previous month and temperatures continue to drop slightly into October. The average maximum temperature in Key West in September is 31°C (88°F). The average maximum temperature is 32°C (90°F) in the previous month and 30°C (85°F) in the next month.
The average temperature in Key West in September is 29°C (83°F). The average temperature is 30°C (85°F) in the previous month and 27°C (81°F) in the next month.
The average minimum temperature in Key West in September is 26°C (79°F). The minimum temperature is 27°C (81°F) in the previous month and 25°C (77°F) in the next month.
The days in September are slightly shorter than the previous month and days continue to get slightly shorter into October. September has less hours of sunshine than the previous month and hours of sunshine continue to drop slightly into October. During September the average day light hours are 12.3 per day in Key West. The sunshine percentage is 62% making it sunny but overcast at times. The hours of sunshine per day are 7.6hrs making the days quite long and bright.
The ultraviolet index in Key West in September is typically 11 during September. An ultraviolet index reading above 11 indicates an extreme risk of harm from unprotected sun exposure. Unprotected skin risks burning in less than 10 minutes. Take all precautions because unprotected skin and eyes can burn in minutes. Tanning will be safest before 10am and after 4pm but only with a good application of sun screen. For those with sensitive skin stay in the shade and wear protective clothing, a wide-brimmed hat, and UV-blocking sunglasses. Generously apply broad spectrum SPF 30+ sunscreen every 2 hours, even on cloudy days. Watch out for relections from water that may increase ultraviolet exposure.
The average sea water temperature in Key West in September is 29.5°C (85.1°F) which is very warm and ideal for relaxing and swimming for the whole day. The sea temperature in September is slightly warmer than the previous month.
September weather is slightly wetter than the previous month. September has a few more days of rain than the previous month. The average total rainfall in Key West in September is 21.7cm (8.5inches) and on average there are 19 rainy days in September making it a wet time to visit the beach.
The maximum dew point (an indicator of humidity) in Key West in September is 25°C (77°F) which is very uncomfortable and fairly oppressive unless you are on a beach. At night you would most likely require airconditioning. The dew point is 25°C (77°F) in the previous month and 23°C (23°F) in the next month.
The average maximum relative humidity in Key West in September is typically 86.1%. The maximum relative humidity is 81.8% in the previous month and 84.8% in the next month.
The average relative humidity in Key West in September is typically 75.8%. The average relative humidity is 72.3% in the previous month and 74.5% in the next month.
The average maximum wind speed in Key West in September is typically 29KM/H (18MPH). The average maximum wind speed is 29KM/H (18MPH) in the previous month and 29KM/H (18MPH) in the next month.
The average wind speed in Key West in September is typically 14KM/H (8MPH). The average wind speed is 14KM/H (9MPH) in the previous month and 16KM/H (10MPH) in the next month.
The average wind direction in Key West in September is from the East.
Beaches recommended for you today, this weekend, in the next 2 weeks or in any month of the year.
Beaches recommended for you today, this weekend, in the next 2 weeks or in any month of the year.
