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Isabela Weather in December

During December, Isabela experiences high daytime temperatures of 28°C (82°F) and cooler nights around 24°C (75°F). Some rainfall is typical during this period.

Rainfall in Isabela in December

Expect around 20 days of rain based on historical data, with 50 mm (2 in) average. Expect plenty of grey, overcast days rather than intense storms. The rain rarely amounts to much on any given day.

Temperature in Isabela in December

If you're visiting Isabela in December, expect perfect temperatures with highs of 28°C (82°F) and overnight lows of 24°C (75°F). This kind of day-to-night contrast is typical for this time of year. At 24°C (75°F) overnight, it stays warm after dark. Light, breathable clothing and good airflow in your room make a noticeable difference.

So this is a great month to visit if you prefer dry days with pleasant temperatures.

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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 Isabela's climate page.

Isabela Temperature in December

Min TemperatureMin Temperature 24°C (75°F)  
Max TemperatureMax Temperature 28°C (82°F)  
Chance of RainChance of Rain 66%  
PrecipitationPrecipitation 50 mm (2 in)  
Rainy daysRainy days 20 days  

Daily Historical Temperatures

50-year average (1976-2025)

Based on our historical records, temperatures in Isabela typically stay consistent throughout December, with daily highs averaging around 28°C (82°F). Nights are warm, with lows around 21°C (70°F).

Average temperatures in December

Historical weather for Isabela in December

Browse day-by-day weather records for Isabela spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Isabela historical weather extremes in December

Based on weather observations in Isabela between 1997 and 2025, these are the recorded extremes during December.

  • The hottest December day on record in Isabela reached 34°C (93°F) (December 24, 2002).
  • The lowest daytime temperature in December was 24°C (75°F), recorded on December 22, 2023.
  • 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 →

Map not visible? Whoops sorry! Please refresh the page.
Legend 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 Isabela in December

Warm weather calls for comfortable, breathable clothing in December. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Rain is likely on several days, so bring a good rain jacket.

What To Do in Isabela in December

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

Cycling
8/10
Walking
8/10
Camping
8/10
Outdoor sports
8/10

Select a Month

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 Isabela's climate page.

More climate data for Isabela