Climate averages 1991–2020
Mayagüez weather
in December.
A hot, fairly dry month: the joint 9th warmest and the 2nd driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
December is a hot month in Mayagüez: daytime highs average 29.0°C and nights cool to about 23.5°C. By daytime temperature it is the joint 9th warmest of the 12 months.
Expect about 18 mm of rain on roughly 5 days, which makes December a fairly dry month (the 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 04 min on an average December day.
The nearest other city in this atlas is Arecibo (54 km away). In December its highs average 28.3°C, 0.7°C cooler than Mayagüez, with 48 mm of rain.
Among the 7 cities listed in Puerto Rico, Mayagüez ranks 1st of 7 for the warmest December highs and 1st of 7 for the driest December (rainfall, lowest first). The mean December high of those 7 cities is 28.1°C; Mayagüez is 0.9°C warmer than that mean.
From December to January, average highs fall by 0.2°C to 28.8°C, and monthly rainfall falls from 18 mm to 16 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
Mayagüez climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 28.8°C22.8°C | 22.8°C | 16 | 4.9 | 11.211 h |
| February | 28.9°C22.6°C | 22.6°C | 19 | 6.4 | 11.512 h |
| March | 29.0°C22.7°C | 22.7°C | 28 | 9.1 | 12.012 h |
| April | 29.3°C23.5°C | 23.5°C | 36 | 10.5 | 12.513 h |
| May | 29.8°C24.5°C | 24.5°C | 70 | 14.7 | 13.013 h |
| June | 31.0°C25.4°C | 25.4°C | 47 | 13.2 | 13.213 h |
| July | 31.5°C25.7°C | 25.7°C | 51 | 14.4 | 13.113 h |
| August | 31.3°C25.8°C | 25.8°C | 67 | 16.7 | 12.713 h |
| September | 30.6°C25.6°C | 25.6°C | 98 | 17.4 | 12.312 h |
| October | 29.9°C25.2°C | 25.2°C | 71 | 15.6 | 11.712 h |
| November | 29.2°C24.4°C | 24.4°C | 54 | 10.3 | 11.311 h |
| December, selected | 29.0°C23.5°C | 23.5°C | 18 | 4.5 | 11.111 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
- Arecibo in DecemberPuerto Rico · 54 kmHigh 28.3°C · Low 22.1°C · 48 mm rain
- Ponce in DecemberPuerto Rico · 58 kmHigh 28.0°C · Low 22.3°C · 28 mm rain
- Bayamón in DecemberPuerto Rico · 106 kmHigh 28.1°C · Low 22.2°C · 45 mm rain
- San Juan in DecemberPuerto Rico · 113 kmHigh 28.1°C · Low 22.1°C · 48 mm rain
- Caguas in DecemberPuerto Rico · 115 kmHigh 27.4°C · Low 22.4°C · 58 mm rain
- Carolina in DecemberPuerto Rico · 126 kmHigh 27.9°C · Low 22.4°C · 48 mm rain
- Punta Cana in DecemberDominican Republic · 140 kmHigh 26.5°C · Low 24.3°C · 52 mm rain
- Salvaleón de Higüey in DecemberDominican Republic · 172 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 Mayagüez) is explained once on the Mayagüez year overview and on the Sources, method and limits page.