Climate averages 1991–2020
Arecibo weather
in December.
A hot, moderately wet month: one of the coolest and the 3rd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a hot month in Arecibo: daytime highs average 28.3°C and nights cool to about 22.1°C. By daytime temperature it is one of the coolest months of the year.
Expect about 48 mm of rain on roughly 11 days, which makes December a moderately wet month (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 03 min on an average December day.
The nearest other city in this atlas is Ponce (52 km away). In December its highs average 28.0°C, about as warm as Arecibo, with 28 mm of rain.
Among the 7 cities listed in Puerto Rico, Arecibo ranks 2nd of 7 for the warmest December highs and joint 4th of 7 for the driest December (rainfall, lowest first). The mean December high of those 7 cities is 28.1°C; Arecibo is 0.2°C warmer than that mean.
From December to January, average highs stay level at 28.3°C, and monthly rainfall falls from 48 mm to 41 mm.
The annual picture
December in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Arecibo climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 28.3°C21.5°C | 21.5°C | 41 | 9.5 | 11.211 h |
| February | 29.0°C21.3°C | 21.3°C | 37 | 8.2 | 11.512 h |
| March | 29.6°C21.4°C | 21.4°C | 59 | 9.9 | 12.012 h |
| April | 29.9°C22.2°C | 22.2°C | 107 | 13.7 | 12.613 h |
| May | 30.4°C23.3°C | 23.3°C | 165 | 18.3 | 13.013 h |
| June | 31.5°C24.3°C | 24.3°C | 92 | 13.8 | 13.213 h |
| July | 31.7°C24.6°C | 24.6°C | 79 | 14.8 | 13.113 h |
| August | 31.7°C24.7°C | 24.7°C | 101 | 19.6 | 12.813 h |
| September | 31.2°C24.4°C | 24.4°C | 154 | 22.3 | 12.312 h |
| October | 30.4°C24.0°C | 24.0°C | 138 | 21.3 | 11.712 h |
| November | 28.9°C23.1°C | 23.1°C | 113 | 17.4 | 11.311 h |
| December, selected | 28.3°C22.1°C | 22.1°C | 48 | 11.4 | 11.011 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
December in nearby cities
- Ponce in DecemberPuerto Rico · 52 kmHigh 28.0°C · Low 22.3°C · 28 mm rain
- Mayagüez in DecemberPuerto Rico · 54 kmHigh 29.0°C · Low 23.5°C · 18 mm rain
- Bayamón in DecemberPuerto Rico · 60 kmHigh 28.1°C · Low 22.2°C · 45 mm rain
- San Juan in DecemberPuerto Rico · 64 kmHigh 28.1°C · Low 22.1°C · 48 mm rain
- Caguas in DecemberPuerto Rico · 75 kmHigh 27.4°C · Low 22.4°C · 58 mm rain
- Carolina in DecemberPuerto Rico · 81 kmHigh 27.9°C · Low 22.4°C · 48 mm rain
- Punta Cana in DecemberDominican Republic · 178 kmHigh 26.5°C · Low 24.3°C · 52 mm rain
- Salvaleón de Higüey in DecemberDominican Republic · 211 kmHigh 27.3°C · Low 22.3°C · 37 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Arecibo) is explained once on the Arecibo year overview and on the Sources, method and limits page.