Bayamon Weather in December
During December, Bayamon experiences high daytime temperatures of 29°C (84°F) and cooler nights around 23°C (73°F). Expect quite a bit of rainfall. Around 60 mm (2.4 in) is typical.
Rainfall in Bayamon in December
Past climate data indicates that roughly 21 days will see rain, totalling around 60 mm (2.4 in) for the month. With rain spread across many days but low totals, showers are typically short and light rather than heavy.
Temperature in Bayamon in December
Bayamon has perfect weather in December, with days reaching 29°C (84°F) and nights cooling to 23°C (73°F). Overall, the month follows a fairly predictable daily temperature pattern. At 23°C (73°F) overnight, nights are warm enough to sit outside comfortably in light clothing.
Sunshine in Bayamon in December
The days are predominantly sunny, with an estimated total of around 216 hours of sunshine. These sun-filled days are perfect for playing sports, visiting parks, or going for a bike ride.
Wind Speed in Bayamon in December
Wind speeds average 3 m/s (6 knots) during December. At this speed, light breezes keep leaves and small twigs in gentle motion while the wind also provides natural cooling. Since this is an average, some days are more tranquil while others have more persistent light winds that are more noticeable.
Average water temperature in December
The water temperature is 27°C (81°F), which most people find very comfortable. A good month for swimming and water sports.If you're inclined towards comfortable temperatures and drier conditions, December is a good time to visit Bayamon.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Puerto Rico, check out our Bayamon's climate page.
Bayamon Temperature in December
Min Temperature
23°C (73°F)
Max Temperature
29°C (84°F)
Water Temperature
27°C (81°F) *
Chance of Rain
70%
Precipitation
60 mm (2.4 in)
Rainy days
21 days
Humidity
75% *
Windspeed
3 m/s (6 knots) *
Sunshine
216 hours *
Percentage Sunshine
64% *
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Bayamon typically stay consistent throughout December, with daily highs averaging around 29°C (84°F). Nights are warm, with lows around 23°C (73°F).
Average temperatures in December
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in December
Historical weather for Bayamon in December
Browse day-by-day weather records for Bayamon spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Bayamon historical weather extremes in December
The extremes listed below come from historical weather data collected in Bayamon from 1976 through 2025.
- The warmest day in December was on December 6, 1989, with a maximum of 34°C (93°F).
- On December 29, 2010, Bayamon saw its coldest December day with temperatures maxing out at 24°C (75°F).
- Bayamon registered its coldest December night on December 18, 1996, with temperatures dropping to 18°C (64°F).
Best Places in Puerto Rico in December
Find out more about the weather in Puerto Rico and which places have the best travel conditions in this month. See all of Puerto Rico in December →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Bayamon in December
Warm temperatures in December make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Rain gear is recommended, you can expect wet weather on multiple days. With water temperatures around 27°C (81°F), swimming conditions are excellent. Pack your swimsuit, goggles, and maybe some water shoes. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.What To Do in Bayamon in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Puerto Rico, check out our Bayamon's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Bayamon climate overview or explore weather in Puerto Rico.
