San Juan weather in December (North Puerto Rico, Puerto Rico)

This month is known as a warm month. The average maximum daytime temperature in San Juan in December lies at 28.4°C (83.12°F). The average minimum temperature goes down to around 21.7°C (71.06°F) (often the minimum temperature is noted at night).

December is part of the rainy season with an average precipitation of 203mm (8.0 inches). There are generally around 18 rainy days. If you enjoy blue skies and sunshine, then this is a great time to go to San Juan with 216 hours of sun during the entire month.

 

San Juan, monthly averages in December

Show in Fahrenheit

Min Temperature 21 °C  

Max Temperature 28 °C  

Water Temperature 27 °C *  

Chance of Rain 63%  

Precipitation 202mm  

Rainy days 19 days  

Humidity 75% *  

Sunshine 216 hrs *  

Percentage Sunshine 64% *  

Where to stay in San Juan

Where to go in Puerto Rico in December

Find out more about the weather in Puerto Rico in December and which places have the best weather conditions in this month.

Weather conditions Weather

Temperatures

Precipitation

Legend perfect weather pleasant tolerable unpleasant poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20-29ºC / 68-84ºF and not too much precipitation (less than 90mm / 3.5inches a month).

So what to wear in December? Visitors traveling to San Juan should plan on bringing a totally waterproof coat since it will often be raining. However, also bring your summer cloths because it can be very warm or even hot. With a water temperature of around 27.0°C (80.6°F), this is a great month to swim so bring your swimwear.

What To Do

We rated the following activities from 1 (least suitable) to 10 (best) to do in December.

Swimming

8/10

Cycling

7/10

Walking

7/10

Camping

6/10

Outdoor sports

7/10

Interested in more climate information?

Weather and Climate provides you with all the information you need about the climate in San Juan.

Our site offers climate and forecast data for almost all countries in the world. Are you going to Puerto Rico? On this website you can find historical weather averages for many cities in Puerto Rico. Not sure yet where to go? We now have a tool which suggests which destination suits your ideal climate conditions. Find out where to go with our weather planner.