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Sea
28°
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28°
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29°
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27°
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24°
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26°
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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 (87°F) which is very hot and perfect for sunbathing on clear days. The sunshine percentage is 40.7% making it quite sunny but with regular periods of cloudy and overcast skies. There are 4.9 hours of sunshine per day. It is not an optimal time for sunbathing but it is possible on clearer days in Costa Rica.
September has total rainfall of 19.5cm (7.7inches) making it a bit rainy but with only moderate showers. There are 18.1 days with some rainfall so you can still enjoy the beach on the clear days.
Sea temperatures are a warm 24°C (74°F). September is a good month for swimming in Costa Rica with comfortable temperatures for most people. The sea temperature in September is noticeably cooler than the previous month.
Consider visiting Costa Rica in the months of January, February, March, April, for the best beach weather. Also consider one of our other suggestions for September.
Yes, September is not an optimal time for sunbathing but it is possible on clearer days in Costa Rica.
September has average maximum temperatures of 31°C (87°F) which is very hot and perfect for sunbathing on clear days. The sunshine percentage is 40.7% making it quite sunny but with regular periods of cloudy and overcast skies. There are 4.9 hours of sunshine per day. September has total rainfall of 19.5cm (7.7inches) making it a bit rainy but with only moderate showers. There are 18.1 days with some rainfall so you can still enjoy the beach on the clear days.
More about September temperature and sunshine.
Yes, September is a good month for swimming in Costa Rica with warm sea temperatures 24°C (74°F).
More about September sea temperatures.
Yes, September is a good time for a holiday in Costa Rica.
September has average maximum temperatures of 31°C (87°F) which is very hot and perfect for sunbathing on clear days. The sunshine percentage is 40.7% making it quite sunny but with regular periods of cloudy and overcast skies. There are 4.9 hours of sunshine per day. September has total rainfall of 19.5cm (7.7inches) making it a bit rainy but with only moderate showers. There are 18.1 days with some rainfall so you can still enjoy the beach on the clear days. It is not an optimal time for sunbathing but it is possible on clearer days in Costa Rica. Sea temperatures are a warm 24°C (74°F). September is a good month for swimming in Costa Rica with comfortable temperatures for most people.
More about the September temperatures and sunshine.
Yes, Costa Rica is very hot and perfect for sunbathing on clear days in September.
The average maximum temperature in Costa Rica in September is 31°C (87°F). The average maximum temperature is 31°C (88°) in the previous month and 30°C (86°F) in the next month.
The average temperature in Costa Rica in September is 27°C (80°F). The average temperature is 27°C (80°F) in the previous month and 26°C (79°F) in the next month.
More info about the September temperatures and sunshine.
The average day light hours per day in Costa Rica in September are 12.2. The sunshine percentage is 40.7% making it quite sunny but with regular periods of cloudy and overcast skies. There are 4.9 hours of sunshine per day.
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 Costa Rica in September is 31°C (87°F). The average maximum temperature is 31°C (88°F) in the previous month and 30°C (86°F) in the next month.
The average temperature in Costa Rica in September is 27°C (80°F). The average temperature is 27°C (80°F) in the previous month and 26°C (79°F) in the next month.
The average minimum temperature in Costa Rica in September is 23°C (73°F). The minimum temperature is 23°C (74°F) in the previous month and 23°C (73°F) in the next month.
The days in September are marginally shorter than the previous month and days continue to get marginally 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 12.2 per day in Costa Rica. The sunshine percentage is 40.7% making it quite sunny but with regular periods of cloudy and overcast skies. There are 4.9 hours of sunshine per day.
The ultraviolet index in Costa Rica in September is typically 13.8 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 Costa Rica in September is 23.6°C (74.5°F) which is warm and pleasant for relaxing and swimming for long periods. The sea temperature in September is noticeably cooler than the previous month.
September weather is much wetter than the previous month and rainfall continues to rise slightly into October. September has a few more days of rain than the previous month and rainy days continue to rise slightly into October. The average total rainfall in Costa Rica in September is 19.5cm (7.7inches) and on average there are 18.1 rainy days in September making it a wet time to visit the beach.
The maximum dew point (an indicator of humidity) in Costa Rica in September is 24°C (75°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 24°C (75°F) in the previous month and 24°C (24°F) in the next month.
The average maximum relative humidity in Costa Rica in September is typically 95.3%. The maximum relative humidity is 94.1% in the previous month and 95.5% in the next month.
The average relative humidity in Costa Rica in September is typically 79.8%. The average relative humidity is 76.9% in the previous month and 81.6% in the next month.
The average maximum wind speed in Costa Rica in September is typically 19KM/H (11MPH). The average maximum wind speed is 20KM/H (13MPH) in the previous month and 17KM/H (11MPH) in the next month.
The average wind speed in Costa Rica in September is typically 7KM/H (4MPH). The average wind speed is 8KM/H (5MPH) in the previous month and 7KM/H (4MPH) in the next month.
The average wind direction in Costa Rica in September is from the South.
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.
