Monthly climate averages for Palmarejo, Puerto Rico. Based on 10-year ERA5 reanalysis data.
Am Tropical Monsoon
Climate OverviewPalmarejo, Puerto Rico in December has warm conditions, with highs averaging 27°C (81°F). Rain falls on about 12 days this month. Sea temperature reaches 27.7°C (82°F).
This month falls at the beginning of Winter.
Temperatures remain fairly steady throughout December, with daily highs around 27°C (81°F).
December sees fairly even rainfall, totalling about 38 mm across the month.
The warmest days tend to fall around the 1th, averaging 27.6°C (82°F).
Compared to November, this month is about 1°C cooler with 6 fewer rainy days.
Daily averages based on historical data (2016–2025)
Daytime temperatures around 27°C (81°F) are ideal for full-day outdoor exploration. Keep afternoons flexible as tropical showers are common — they typically clear within an hour.
Rain most often builds later in the day, so mornings are typically the driest window and afternoon showers are more likely.
Recent yearly records for December have stayed close to the long-run average.
| Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January best | 27°C / 21°C | 28°C / 22°C | 11days (30 mm) Wet | 10.4h Excellent | 82% Humid | 6.5 High | Excellent | View Details |
| February best | 27°C / 21°C | 28°C / 22°C | 12days (44 mm) Wet | 10.7h Excellent | 80% Humid | 7.5 Very High | Excellent | View Details |
| March best | 27°C / 21°C | 30°C / 22°C | 13days (50 mm) Wet | 10.9h Excellent | 80% Humid | 8.4 Very High | Excellent | View Details |
| April | 28°C / 21°C | 31°C / 24°C | 18days (83 mm) Wet | 11.3h Excellent | 81% Humid | 8.5 Very High | Wet | View Details |
| May | 29°C / 23°C | 33°C / 25°C | 19days (84 mm) Wet | 11.5h Excellent | 83% Humid | 8.7 Very High | Wet | View Details |
| June | 29°C / 24°C | 33°C / 26°C | 16days (62 mm) Wet | 11.9h Excellent | 82% Humid | 8.6 Very High | Fair | View Details |
| July | 30°C / 24°C | 33°C / 27°C | 18days (90 mm) Wet | 11.6h Excellent | 82% Humid | 8.6 Very High | Wet | View Details |
| August | 30°C / 24°C | 34°C / 27°C | 19days (103 mm) Wet | 11.1h Excellent | 83% Humid | 8.7 Very High | Wet | View Details |
| September | 29°C / 24°C | 35°C / 28°C | 23days (169 mm) Wet | 10.5h Excellent | 86% Very Muggy | 8.4 Very High | Wet | View Details |
| October | 29°C / 23°C | 34°C / 27°C | 23days (141 mm) Wet | 9.8h Good | 88% Very Muggy | 7.4 Very High | Wet | View Details |
| November | 28°C / 23°C | 32°C / 25°C | 18days (120 mm) Wet | 9.6h Good | 87% Very Muggy | 6.5 High | Wet | View Details |
| December best | 27°C / 22°C | 29°C / 24°C | 12days (38 mm) Wet | 10.2h Excellent | 84% Humid | 6.1 High | Excellent | View Details |
Summer clothing like shorts, t-shirts, and sundresses will be comfortable. Bring a light cardigan for air-conditioned spaces.
A waterproof jacket or compact umbrella is recommended for occasional showers.
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