Puerto Rico weather in December
In December, Puerto Rico sees average daytime highs of 31°C and overnight lows near 20°C, with 181 mm of rain across 14 wet days and about 13.7 hours of daylight. It is the 2nd-warmest and 2nd-wettest month of the year here.
Day-to-day highs hold fairly steady near 31°C through the month. The sky is clear or mostly clear about 38% of the time in December, and the air most often feels oppressive.
Daylight stretches from about 13 h 36 min at the start of December to 13 h 42 min by month's end. Set against the rest of the year, December is Puerto Rico's 9th-clearest and 8th-windiest month. For the whole year in context, see Puerto Rico's year-round climate.
- Daytime high
- 31°
- 2nd warmest
- Overnight low
- 20°
- 10th coldest
- Rainfall
- 181 mm
- 14 wet days
- Daylight
- 13 h 42 min
- 5:46 AM – 7:27 PM
- Cloud cover
- 56%
- 9th clearest
- Wind
- 8 km/h
- 8th windiest
- Solar energy
- 6.44 kWh/m²
- Travel score
- 4.1
- out of 10
Puerto Rico is capital city of the Libertador General San Martín Department, in the Misiones Province of Argentina.
- Founded
- 1919
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in December
Day-to-day highs hold fairly steady near 31°C through the month.
A typical December day in Puerto Rico reaches about 31°C in the afternoon and slips back to 20°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 35°C. Set against its neighbours, December runs about 2°C warmer than November and on par with January.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 32 | 32 | 32 | 32 | 32 | 32 |
| Avg low (°C) | 19 | 19 | 19 | 19 | 19 | 19 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 31 | 19 |
| 2 | 31 | 19 |
| 3 | 31 | 19 |
| 4 | 31 | 19 |
| 5 | 31 | 19 |
| 6 | 31 | 19 |
| 7 | 31 | 20 |
| 8 | 31 | 20 |
| 9 | 31 | 20 |
| 10 | 31 | 20 |
| 11 | 31 | 20 |
| 12 | 31 | 20 |
| 13 | 31 | 20 |
| 14 | 31 | 20 |
| 15 | 31 | 20 |
| 16 | 31 | 20 |
| 17 | 31 | 20 |
| 18 | 31 | 20 |
| 19 | 31 | 20 |
| 20 | 31 | 20 |
| 21 | 31 | 20 |
| 22 | 31 | 20 |
| 23 | 31 | 21 |
| 24 | 31 | 21 |
| 25 | 31 | 21 |
| 26 | 32 | 21 |
| 27 | 32 | 21 |
| 28 | 32 | 21 |
| 29 | 32 | 21 |
| 30 | 32 | 21 |
| 31 | 32 | 21 |
How December really feels in Puerto Rico
Once humidity and wind are folded in, December averages 27 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
The story in December is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Puerto Rico weather by month
How December compares with the rest of the year at a glance. December is the 2nd-warmest and 2nd-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 32° / 21° | 151 | 14.9 | 13.5 | 3.7 |
| Feb | 31° / 21° | 154 | 14.4 | 12.9 | 4.0 |
| Mar | 30° / 20° | 137 | 11.9 | 12.2 | 4.9 |
| Apr | 27° / 17° | 141 | 9.7 | 11.4 | 6.5 |
| May | 23° / 14° | 162 | 9.2 | 10.7 | 7.0 |
| Jun | 21° / 12° | 154 | 9.1 | 10.3 | 6.7 |
| Jul | 21° / 11° | 125 | 9.1 | 10.5 | 6.9 |
| Aug | 24° / 13° | 90 | 7.6 | 11.1 | 7.6 |
| Sep | 26° / 15° | 153 | 10.2 | 11.8 | 6.8 |
| Oct | 28° / 17° | 206 | 13.2 | 12.6 | 5.8 |
| Nov | 30° / 18° | 167 | 11.4 | 13.3 | 5.1 |
| Dec | 31° / 20° | 181 | 14 | 13.7 | 4.1 |
Cloud cover in December
The sky is clear or mostly clear about 38% of the time in December.
Beyond those clear spells, partly cloudy skies cover about 15% of December, with mostly cloudy or overcast conditions the remaining 46%. Skies tend to cloud over as the month goes on.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 53 | 53 | 54 | 54 | 53 | 54 | 54 | 54 | 55 | 54 | 54 | 55 | 55 | 55 | 55 | 56 | 56 | 56 | 55 | 55 | 55 | 54 | 53 | 53 | 52 | 51 | 50 | 50 | 50 | 51 | 51 |
| Cloudier (%) | 47 | 47 | 46 | 46 | 47 | 46 | 46 | 46 | 45 | 46 | 46 | 45 | 45 | 45 | 45 | 44 | 44 | 44 | 45 | 45 | 45 | 46 | 47 | 47 | 48 | 49 | 50 | 50 | 50 | 49 | 49 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 53 | 47 |
| 2 | 53 | 47 |
| 3 | 54 | 46 |
| 4 | 54 | 46 |
| 5 | 53 | 47 |
| 6 | 54 | 46 |
| 7 | 54 | 46 |
| 8 | 54 | 46 |
| 9 | 55 | 45 |
| 10 | 54 | 46 |
| 11 | 54 | 46 |
| 12 | 55 | 45 |
| 13 | 55 | 45 |
| 14 | 55 | 45 |
| 15 | 55 | 45 |
| 16 | 56 | 44 |
| 17 | 56 | 44 |
| 18 | 56 | 44 |
| 19 | 55 | 45 |
| 20 | 55 | 45 |
| 21 | 55 | 45 |
| 22 | 54 | 46 |
| 23 | 53 | 47 |
| 24 | 53 | 47 |
| 25 | 52 | 48 |
| 26 | 51 | 49 |
| 27 | 50 | 50 |
| 28 | 50 | 50 |
| 29 | 50 | 50 |
| 30 | 51 | 49 |
| 31 | 51 | 49 |
Chance of precipitation in December
Puerto Rico gets around 181 mm of rain over 14 wet days in December. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 45% and peaks near 49% on the wettest days. The odds climb toward the end of the month.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 40 | 41 | 41 | 41 | 42 | 42 | 42 | 42 | 42 | 43 | 43 | 43 | 43 | 44 | 44 | 44 | 45 | 45 | 45 | 45 | 46 | 47 | 47 | 48 | 48 | 49 | 49 | 49 | 49 | 49 | 49 |
| Rain chance (%) | |
|---|---|
| 1 | 40 |
| 2 | 41 |
| 3 | 41 |
| 4 | 41 |
| 5 | 42 |
| 6 | 42 |
| 7 | 42 |
| 8 | 42 |
| 9 | 42 |
| 10 | 43 |
| 11 | 43 |
| 12 | 43 |
| 13 | 43 |
| 14 | 44 |
| 15 | 44 |
| 16 | 44 |
| 17 | 45 |
| 18 | 45 |
| 19 | 45 |
| 20 | 45 |
| 21 | 46 |
| 22 | 47 |
| 23 | 47 |
| 24 | 48 |
| 25 | 48 |
| 26 | 49 |
| 27 | 49 |
| 28 | 49 |
| 29 | 49 |
| 30 | 49 |
| 31 | 49 |
Humidity in December
Most of December feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, December lands in the oppressive band about 37% of days. Sticky, muggy-or-worse air turns up on roughly 73% of them.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 4 | 4 | 4 | 4 | 4 | 4 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Comfortable (%) | 11 | 11 | 10 | 10 | 9 | 9 | 9 | 9 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 7 | 7 | 7 | 7 | 7 | 7 | 6 | 6 | 6 | 6 | 5 | 5 | 5 | 5 | 5 | 5 |
| Humid (%) | 21 | 20 | 20 | 20 | 19 | 19 | 19 | 19 | 19 | 18 | 18 | 18 | 18 | 17 | 17 | 17 | 17 | 16 | 16 | 15 | 15 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 12 | 12 | 12 |
| Muggy (%) | 40 | 40 | 40 | 40 | 39 | 39 | 39 | 38 | 38 | 38 | 37 | 37 | 37 | 36 | 36 | 36 | 35 | 35 | 34 | 34 | 33 | 33 | 32 | 31 | 30 | 30 | 29 | 29 | 28 | 28 | 28 |
| Oppressive (%) | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 45 | 46 | 47 | 48 | 48 | 49 | 49 | 50 | 50 |
| Miserable (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 3 | 3 | 4 | 4 | 4 | 5 | 5 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|---|---|
| 1 | 5 | 11 | 21 | 40 | 23 | 0 |
| 2 | 5 | 11 | 20 | 40 | 24 | 0 |
| 3 | 5 | 10 | 20 | 40 | 25 | 0 |
| 4 | 5 | 10 | 20 | 40 | 26 | 0 |
| 5 | 5 | 9 | 19 | 39 | 27 | 0 |
| 6 | 5 | 9 | 19 | 39 | 28 | 0 |
| 7 | 5 | 9 | 19 | 39 | 29 | 0 |
| 8 | 4 | 9 | 19 | 38 | 30 | 0 |
| 9 | 4 | 8 | 19 | 38 | 31 | 0 |
| 10 | 4 | 8 | 18 | 38 | 31 | 0 |
| 11 | 4 | 8 | 18 | 37 | 32 | 0 |
| 12 | 4 | 8 | 18 | 37 | 33 | 0 |
| 13 | 4 | 8 | 18 | 37 | 34 | 0 |
| 14 | 3 | 8 | 17 | 36 | 35 | 0 |
| 15 | 3 | 8 | 17 | 36 | 36 | 0 |
| 16 | 3 | 7 | 17 | 36 | 37 | 0 |
| 17 | 2 | 7 | 17 | 35 | 38 | 0 |
| 18 | 2 | 7 | 16 | 35 | 39 | 1 |
| 19 | 2 | 7 | 16 | 34 | 40 | 1 |
| 20 | 2 | 7 | 15 | 34 | 41 | 1 |
| 21 | 2 | 7 | 15 | 33 | 42 | 1 |
| 22 | 1 | 6 | 14 | 33 | 43 | 2 |
| 23 | 1 | 6 | 14 | 32 | 45 | 2 |
| 24 | 1 | 6 | 14 | 31 | 46 | 2 |
| 25 | 1 | 6 | 13 | 30 | 47 | 3 |
| 26 | 1 | 5 | 13 | 30 | 48 | 3 |
| 27 | 1 | 5 | 13 | 29 | 48 | 4 |
| 28 | 1 | 5 | 13 | 29 | 49 | 4 |
| 29 | 1 | 5 | 12 | 28 | 49 | 4 |
| 30 | 1 | 5 | 12 | 28 | 50 | 5 |
| 31 | 1 | 5 | 12 | 28 | 50 | 5 |
Wind in December
Winds average 8 km/h in December.
Across December, daily wind ranges from about 8 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 8 | calm |
| 2 | 8 | calm |
| 3 | 8 | calm |
| 4 | 8 | calm |
| 5 | 8 | calm |
| 6 | 8 | calm |
| 7 | 8 | calm |
| 8 | 8 | calm |
| 9 | 8 | calm |
| 10 | 8 | calm |
| 11 | 8 | calm |
| 12 | 8 | calm |
| 13 | 8 | calm |
| 14 | 8 | calm |
| 15 | 8 | calm |
| 16 | 8 | calm |
| 17 | 8 | calm |
| 18 | 8 | calm |
| 19 | 8 | calm |
| 20 | 8 | calm |
| 21 | 8 | calm |
| 22 | 8 | calm |
| 23 | 8 | calm |
| 24 | 8 | calm |
| 25 | 8 | calm |
| 26 | 8 | calm |
| 27 | 8 | calm |
| 28 | 8 | calm |
| 29 | 8 | calm |
| 30 | 8 | calm |
| 31 | 8 | calm |
Sunrise & sunset in December
Daylight runs from about 13 h 36 min at the start of December to 13 h 42 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 6 minutes over December. Sunrise moves from 5:43 AM to 5:53 AM, and sunset from 7:17 PM to 7:33 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 13.6 | 13.6 | 13.6 | 13.6 | 13.6 | 13.6 | 13.6 | 13.6 | 13.6 | 13.6 | 13.7 | 13.7 | 13.7 | 13.7 | 13.7 | 13.7 | 13.7 | 13.7 | 13.7 | 13.7 | 13.7 | 13.7 | 13.7 | 13.7 | 13.7 | 13.7 | 13.7 | 13.7 | 13.7 | 13.7 | 13.7 |
| Sunrise (AM) | 5:43 | 5:43 | 5:43 | 5:43 | 5:43 | 5:43 | 5:44 | 5:44 | 5:44 | 5:44 | 5:44 | 5:45 | 5:45 | 5:45 | 5:46 | 5:46 | 5:46 | 5:47 | 5:47 | 5:48 | 5:48 | 5:48 | 5:49 | 5:49 | 5:50 | 5:50 | 5:51 | 5:52 | 5:52 | 5:53 | 5:53 |
| Sunset (PM) | 7:17 | 7:17 | 7:18 | 7:19 | 7:20 | 7:20 | 7:21 | 7:22 | 7:22 | 7:23 | 7:24 | 7:24 | 7:25 | 7:25 | 7:26 | 7:27 | 7:27 | 7:28 | 7:28 | 7:29 | 7:29 | 7:30 | 7:30 | 7:31 | 7:31 | 7:31 | 7:32 | 7:32 | 7:33 | 7:33 | 7:33 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 13.6 | 5:43 | 7:17 |
| 2 | 13.6 | 5:43 | 7:17 |
| 3 | 13.6 | 5:43 | 7:18 |
| 4 | 13.6 | 5:43 | 7:19 |
| 5 | 13.6 | 5:43 | 7:20 |
| 6 | 13.6 | 5:43 | 7:20 |
| 7 | 13.6 | 5:44 | 7:21 |
| 8 | 13.6 | 5:44 | 7:22 |
| 9 | 13.6 | 5:44 | 7:22 |
| 10 | 13.6 | 5:44 | 7:23 |
| 11 | 13.7 | 5:44 | 7:24 |
| 12 | 13.7 | 5:45 | 7:24 |
| 13 | 13.7 | 5:45 | 7:25 |
| 14 | 13.7 | 5:45 | 7:25 |
| 15 | 13.7 | 5:46 | 7:26 |
| 16 | 13.7 | 5:46 | 7:27 |
| 17 | 13.7 | 5:46 | 7:27 |
| 18 | 13.7 | 5:47 | 7:28 |
| 19 | 13.7 | 5:47 | 7:28 |
| 20 | 13.7 | 5:48 | 7:29 |
| 21 | 13.7 | 5:48 | 7:29 |
| 22 | 13.7 | 5:48 | 7:30 |
| 23 | 13.7 | 5:49 | 7:30 |
| 24 | 13.7 | 5:49 | 7:31 |
| 25 | 13.7 | 5:50 | 7:31 |
| 26 | 13.7 | 5:50 | 7:31 |
| 27 | 13.7 | 5:51 | 7:32 |
| 28 | 13.7 | 5:52 | 7:32 |
| 29 | 13.7 | 5:52 | 7:33 |
| 30 | 13.7 | 5:53 | 7:33 |
| 31 | 13.7 | 5:53 | 7:33 |
Solar energy in December
Average shortwave solar energy reaching the ground each day in December, about 6.44 kWh/m² — the sunniest month for solar.
For context, solar energy here swings from a low near 2.69 kWh/m² to a high of 6.44 kWh/m² in December across the year — December's 6.44 kWh/m² sits near the top of that range.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 6.4 | 6.4 | 6.4 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.4 | 6.4 | 6.4 | 6.4 | 6.4 | 6.4 | 6.4 | 6.4 |
| Level | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 6.4 | Intense |
| 2 | 6.4 | Intense |
| 3 | 6.4 | Intense |
| 4 | 6.5 | Intense |
| 5 | 6.5 | Intense |
| 6 | 6.5 | Intense |
| 7 | 6.5 | Intense |
| 8 | 6.5 | Intense |
| 9 | 6.5 | Intense |
| 10 | 6.5 | Intense |
| 11 | 6.5 | Intense |
| 12 | 6.5 | Intense |
| 13 | 6.5 | Intense |
| 14 | 6.5 | Intense |
| 15 | 6.5 | Intense |
| 16 | 6.5 | Intense |
| 17 | 6.5 | Intense |
| 18 | 6.5 | Intense |
| 19 | 6.5 | Intense |
| 20 | 6.5 | Intense |
| 21 | 6.5 | Intense |
| 22 | 6.5 | Intense |
| 23 | 6.5 | Intense |
| 24 | 6.4 | Intense |
| 25 | 6.4 | Intense |
| 26 | 6.4 | Intense |
| 27 | 6.4 | Intense |
| 28 | 6.4 | Intense |
| 29 | 6.4 | Intense |
| 30 | 6.4 | Intense |
| 31 | 6.4 | Intense |
Is December a good time to visit Puerto Rico?
Our two travel scores rate December for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
December is a reasonable time to visit Puerto Rico for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Puerto Rico in December
From December's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In December, Puerto Rico sees daytime highs around 31°C and nights near 20°C. Pack light clothes, rain gear and sun protection. About 14 days see rain.
UV index in Puerto Rico in December
Clear-sky midday UV in December peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Puerto Rico peaks around January 18 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 at about 4 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 14 | 13 | 12 | 8 | 6 | 4 | 4 | 6 | 8 | 8 | 11 | 13 |
| Level | Extreme | Extreme | Extreme | Very high | High | Moderate | Moderate | High | Very high | Very high | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 14 | Extreme |
| Feb | 13 | Extreme |
| Mar | 12 | Extreme |
| Apr | 8 | Very high |
| May | 6 | High |
| Jun | 4 | Moderate |
| Jul | 4 | Moderate |
| Aug | 6 | High |
| Sep | 8 | Very high |
| Oct | 8 | Very high |
| Nov | 11 | Extreme |
| Dec | 13 | Extreme |
Air quality in Puerto Rico in December
Average fine-particle pollution (PM2.5) through the year — so you can see where December falls, not just the annual average.
Air quality in Puerto Rico is worst in September — around 19 µg/m³ PM2.5 (moderate), about 2.8× the cleanest month (December, 7 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 8 | 9 | 7 | 8 | 7 | 7 | 10 | 16 | 19 | 11 | 8 | 7 |
| Level | Good | Good | Good | Good | Good | Good | Good | Moderate | Moderate | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 8 | Good |
| Feb | 9 | Good |
| Mar | 7 | Good |
| Apr | 8 | Good |
| May | 7 | Good |
| Jun | 7 | Good |
| Jul | 10 | Good |
| Aug | 16 | Moderate |
| Sep | 19 | Moderate |
| Oct | 11 | Good |
| Nov | 8 | Good |
| Dec | 7 | Good |
Where is Puerto Rico?
Puerto Rico sits at 26.8°S, 55.0°W, 188 m above sea level, in Argentina. The nearest listed city is Jardín América, 33 km away.
Topography around Puerto Rico
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Puerto Rico.
Within 3 km, the terrain around Puerto Rico has only modest variations in elevation — a maximum elevation change of 161 m around an average of 158 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 250 m; within 80 km, significant variations in elevation — a maximum elevation change of 550 m.
The land around Puerto Rico is covered by trees (52%) and grassland (24%) within 3 km, trees (59%) and cropland (21%) within 16 km, and trees (65%) and cropland (24%) within 80 km.
Argentina travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type C / I
- 220 V · 50 Hz
- Prices
- ≈ 46% of US
- price level, 2025
- GDP per capita
- $14,898
- 2025
- Happiness
- 6.4 / 10
- World Happiness, 2025
- Homicide rate
- 4.5
- per 100k, 2023
- Road deaths
- 14.1
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- High
- EF EPI 575
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Puerto Rico (-26.8089°, -55.0215°, elevation 188 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).