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.
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 Temperature
24°C (75°F)
Max Temperature
28°C (82°F)
Chance of Rain
66%
Precipitation
50 mm (2 in)
Rainy 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 →
perfect weather
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tolerable
unpleasant
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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.
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.
See the full Isabela climate overview or explore weather in Puerto Rico.
