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Adjuntas Weather in December
During December, Adjuntas experiences high daytime temperatures of 26°C (79°F) and cooler nights around 20°C (68°F). Some rainfall is typical during this period.
Rainfall in Adjuntas in December
The climate data from previous years indicates about 21 days of rain, averaging 40 mm (1.6 in) for the month. With rain spread across many days but low totals, showers are typically short and light rather than heavy.
Temperature in Adjuntas in December
If you're visiting Adjuntas in December, expect excellent temperatures with highs of 26°C (79°F) and overnight lows of 20°C (68°F). The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. At 20°C (68°F) overnight, nights are warm enough to sit outside comfortably in light clothing.Our weather planner can help you find worldwide destinations with pleasant weather during this period. January, February, March, June, July and December typically offer the best weather for Adjuntas.
Adjuntas Temperature in December
Min Temperature
20°C (68°F)
Max Temperature
26°C (79°F)
Chance of Rain
69%
Precipitation
40 mm (1.6 in)
Rainy days
21 days
Adjuntas Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Adjuntas - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Adjuntas typically stay consistent throughout December, with daily highs averaging around 26°C (79°F). Nights are warm, with lows around 21°C (70°F).
Average temperatures in December
Historical weather records for Adjuntas in December
Browse day-by-day weather records for Adjuntas spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Adjuntas historical weather extremes in December
Based on 28 years of weather observations (1997-2025), these are the most extreme conditions recorded in Adjuntas.
- On December 24, 2002, temperatures climbed to 34°C (93°F), marking the warmest December day on record.
- The coldest December day was on December 5, 2013, with a maximum of 25°C (77°F).
- Nighttime temperatures dropped to 16°C (61°F) on December 18, 2008, marking the coldest December night on record.
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
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Adjuntas in December
Warm but pleasant conditions in Adjuntas in December. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. Light rain is possible, so consider bringing a small umbrella or rain jacket.
What To Do in Adjuntas in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling8/10 -
Walking8/10 -
Camping10/10 -
Outdoor sports8/10
Adjuntas 3-Day Forecast
More climate data for Adjuntas
See the full Adjuntas climate overview or explore weather in Puerto Rico.
Popular in December
Where to go in December - average daytime high across popular destinations.
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