Weather in San Juan, Puerto Rico in December

So you're interested in going to San Juan, Puerto Rico in December

December is a hot and very rainy time for sunbathing in San Juan. December is an excellent month for swimming in San Juan with very warm sea temperatures. Consider visiting San Juan in the months of January, February, March, April, for the best beach weather. Also consider one of our other suggestions for December.

Temperature in San Juan in December

The average maximum temperature in San Juan in December is 29°. The average maximum temperature is 30° in the previous month and 28° in the next month.

The average temperature in San Juan in December is 26°. The average temperature ranges is 27° in the previous month and 25° in the next month.

The average minimum temperature in San Juan in December is 23°. The minimum temperature is 24° in the previous month and 22° in the next month.

Sunshine in San Juan in December

The average day light hours per day in San Juan in December are 11 and there are 7.3 hours of sunshine per day on average during December making it a quite sunny month with some cloud cover.

The ultraviolet index in San Juan in December is typically 7.5 during December. An ultraviolet index reading of 8 to 10 indicates a very high risk of harm from unprotected sun exposure. Unprotected skin risks burning in less than 15 minutes. Take extra precautions because unprotected skin and eyes will be damaged and can burn quickly. 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.

Sea Temperature in San Juan in December

The average sea water temperature in San Juan in December is 27.5° which is very warm and ideal for relaxing and swimming for the whole day.

Rainfall in San Juan in December

The average total rainfall in San Juan in December is 161.6cm and on average there are 25.3 rainy days in December making it a very wet time to visit the beach.

Humidity in San Juan in December

The maximum dew point (an indicator of humidity) in San Juan in December is 22° which is very humid and quite uncomfortable for most unless you are on a beach. At night you would most likely require a fan. The dew point is 23° in the previous month and 22° in the next month.

The average maximum relative humidity in San Juan in December is typically 88.9%. The maximum relative humidity is 89% in the previous month and 89.7% in the next month.

The average relative humidity in San Juan in December is typically 76.4%. The average relative humidity is 76.2% in the previous month and 76.4% in the next month.

Wind Speed in San Juan in December

The average maximum wind speed in San Juan in December is typically 30kmh. The average maximum wind speed is 28kmh in the previous month and 30kmh in the next month.

The average wind speed in San Juan in December is typically 12kmh. The average wind speed is 10kmh in the previous month and 13kmh in the next month.

The average wind direction in San Juan in December is from the East-Northeast.

Monthly Averages

Suggested Beaches in December

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