Puerto Rico weather in September
In September, Puerto Rico sees average daytime highs of 26°C and overnight lows near 15°C, with 153 mm of rain across 10.2 wet days and about 11.8 hours of daylight. It is the 8th-warmest and 7th-wettest month of the year here.
Day-to-day highs hold fairly steady near 26°C through the month. The sky is clear or mostly clear about 45% of the time in September, and the air most often feels dry.
Daylight stretches from about 11 h 24 min at the start of September to 12 h 12 min by month's end. Set against the rest of the year, September is Puerto Rico's 3rd-clearest and 2nd-windiest month. For the whole year in context, see Puerto Rico's year-round climate.
- Daytime high
- 26°
- 8th warmest
- Overnight low
- 15°
- 5th coldest
- Rainfall
- 153 mm
- 10.2 wet days
- Daylight
- 11 h 48 min
- 6:39 AM – 6:30 PM
- Cloud cover
- 49%
- 3rd clearest
- Wind
- 10 km/h
- 2nd windiest
- Solar energy
- 4.66 kWh/m²
- Travel score
- 6.8
- 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 September
Day-to-day highs hold fairly steady near 26°C through the month.
A typical September day in Puerto Rico reaches about 26°C in the afternoon and slips back to 15°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 19°C and 33°C. Set against its neighbours, September runs about 2°C warmer than August and about 2°C cooler than October.
| 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 |
| Avg low (°C) | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 16 | 16 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 25 | 14 |
| 2 | 25 | 14 |
| 3 | 25 | 14 |
| 4 | 25 | 14 |
| 5 | 25 | 14 |
| 6 | 25 | 14 |
| 7 | 26 | 14 |
| 8 | 26 | 14 |
| 9 | 26 | 14 |
| 10 | 26 | 14 |
| 11 | 26 | 14 |
| 12 | 26 | 14 |
| 13 | 26 | 14 |
| 14 | 26 | 15 |
| 15 | 26 | 15 |
| 16 | 26 | 15 |
| 17 | 26 | 15 |
| 18 | 26 | 15 |
| 19 | 26 | 15 |
| 20 | 26 | 15 |
| 21 | 26 | 15 |
| 22 | 26 | 15 |
| 23 | 26 | 15 |
| 24 | 26 | 15 |
| 25 | 26 | 15 |
| 26 | 26 | 15 |
| 27 | 26 | 15 |
| 28 | 26 | 15 |
| 29 | 26 | 16 |
| 30 | 26 | 16 |
How September really feels in Puerto Rico
Once humidity and wind are folded in, September averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Puerto Rico weather by month
How September compares with the rest of the year at a glance. September is the 8th-warmest and 7th-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 September
The sky is clear or mostly clear about 45% of the time in September.
Beyond those clear spells, partly cloudy skies cover about 13% of September, with mostly cloudy or overcast conditions the remaining 43%. 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 65 | 64 | 64 | 63 | 63 | 62 | 62 | 60 | 60 | 59 | 59 | 59 | 59 | 58 | 58 | 58 | 57 | 57 | 56 | 56 | 55 | 55 | 54 | 54 | 53 | 53 | 52 | 51 | 50 | 50 |
| Cloudier (%) | 35 | 36 | 36 | 37 | 37 | 38 | 38 | 40 | 40 | 41 | 41 | 41 | 41 | 42 | 42 | 42 | 43 | 43 | 44 | 44 | 45 | 45 | 46 | 46 | 47 | 47 | 48 | 49 | 50 | 50 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 65 | 35 |
| 2 | 64 | 36 |
| 3 | 64 | 36 |
| 4 | 63 | 37 |
| 5 | 63 | 37 |
| 6 | 62 | 38 |
| 7 | 62 | 38 |
| 8 | 60 | 40 |
| 9 | 60 | 40 |
| 10 | 59 | 41 |
| 11 | 59 | 41 |
| 12 | 59 | 41 |
| 13 | 59 | 41 |
| 14 | 58 | 42 |
| 15 | 58 | 42 |
| 16 | 58 | 42 |
| 17 | 57 | 43 |
| 18 | 57 | 43 |
| 19 | 56 | 44 |
| 20 | 56 | 44 |
| 21 | 55 | 45 |
| 22 | 55 | 45 |
| 23 | 54 | 46 |
| 24 | 54 | 46 |
| 25 | 53 | 47 |
| 26 | 53 | 47 |
| 27 | 52 | 48 |
| 28 | 51 | 49 |
| 29 | 50 | 50 |
| 30 | 50 | 50 |
Chance of precipitation in September
Puerto Rico gets around 153 mm of rain over 10.2 wet days in September. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 34% and peaks near 40% 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 26 | 26 | 26 | 27 | 27 | 28 | 29 | 29 | 30 | 31 | 32 | 32 | 33 | 34 | 35 | 35 | 36 | 37 | 37 | 38 | 38 | 39 | 39 | 39 | 39 | 40 | 40 | 40 | 40 | 40 |
| Rain chance (%) | |
|---|---|
| 1 | 26 |
| 2 | 26 |
| 3 | 26 |
| 4 | 27 |
| 5 | 27 |
| 6 | 28 |
| 7 | 29 |
| 8 | 29 |
| 9 | 30 |
| 10 | 31 |
| 11 | 32 |
| 12 | 32 |
| 13 | 33 |
| 14 | 34 |
| 15 | 35 |
| 16 | 35 |
| 17 | 36 |
| 18 | 37 |
| 19 | 37 |
| 20 | 38 |
| 21 | 38 |
| 22 | 39 |
| 23 | 39 |
| 24 | 39 |
| 25 | 39 |
| 26 | 40 |
| 27 | 40 |
| 28 | 40 |
| 29 | 40 |
| 30 | 40 |
Humidity in September
Most of September feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, September lands in the dry band about 31% of days. Sticky, muggy-or-worse air turns up on roughly 14% 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 36 | 36 | 35 | 35 | 34 | 34 | 34 | 33 | 33 | 32 | 32 | 32 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 30 | 29 | 29 | 28 | 27 | 26 | 25 | 24 | 23 | 22 |
| Comfortable (%) | 31 | 30 | 30 | 30 | 29 | 29 | 29 | 28 | 28 | 27 | 27 | 27 | 26 | 26 | 26 | 25 | 25 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 23 | 23 | 23 |
| Humid (%) | 27 | 27 | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 29 | 29 | 29 | 29 | 30 | 30 | 30 | 30 | 30 | 31 | 31 | 31 | 31 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 |
| Muggy (%) | 6 | 7 | 8 | 8 | 9 | 9 | 10 | 10 | 11 | 11 | 11 | 12 | 12 | 12 | 13 | 13 | 13 | 13 | 13 | 14 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 22 | 23 | 24 |
| Oppressive (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|---|---|
| 1 | 36 | 31 | 27 | 6 | 0 |
| 2 | 36 | 30 | 27 | 7 | 0 |
| 3 | 35 | 30 | 27 | 8 | 0 |
| 4 | 35 | 30 | 27 | 8 | 0 |
| 5 | 34 | 29 | 27 | 9 | 0 |
| 6 | 34 | 29 | 28 | 9 | 0 |
| 7 | 34 | 29 | 28 | 10 | 0 |
| 8 | 33 | 28 | 28 | 10 | 0 |
| 9 | 33 | 28 | 28 | 11 | 0 |
| 10 | 32 | 27 | 29 | 11 | 0 |
| 11 | 32 | 27 | 29 | 11 | 0 |
| 12 | 32 | 27 | 29 | 12 | 1 |
| 13 | 31 | 26 | 29 | 12 | 1 |
| 14 | 31 | 26 | 30 | 12 | 1 |
| 15 | 31 | 26 | 30 | 13 | 1 |
| 16 | 31 | 25 | 30 | 13 | 1 |
| 17 | 31 | 25 | 30 | 13 | 1 |
| 18 | 31 | 24 | 30 | 13 | 1 |
| 19 | 31 | 24 | 31 | 13 | 1 |
| 20 | 31 | 24 | 31 | 14 | 1 |
| 21 | 30 | 24 | 31 | 14 | 1 |
| 22 | 29 | 24 | 31 | 15 | 1 |
| 23 | 29 | 24 | 30 | 16 | 1 |
| 24 | 28 | 24 | 30 | 17 | 1 |
| 25 | 27 | 24 | 30 | 18 | 1 |
| 26 | 26 | 24 | 30 | 19 | 1 |
| 27 | 25 | 24 | 30 | 20 | 1 |
| 28 | 24 | 23 | 30 | 22 | 1 |
| 29 | 23 | 23 | 30 | 23 | 1 |
| 30 | 22 | 23 | 30 | 24 | 1 |
Wind in September
Winds average 10 km/h in September.
Across September, daily wind ranges from about 9 km/h on the calmest days to 10 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 |
| 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 |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 10 | calm |
| 2 | 10 | calm |
| 3 | 10 | calm |
| 4 | 10 | calm |
| 5 | 10 | calm |
| 6 | 10 | calm |
| 7 | 10 | calm |
| 8 | 10 | calm |
| 9 | 10 | calm |
| 10 | 10 | calm |
| 11 | 10 | calm |
| 12 | 10 | calm |
| 13 | 10 | calm |
| 14 | 10 | calm |
| 15 | 10 | calm |
| 16 | 9 | calm |
| 17 | 9 | calm |
| 18 | 9 | calm |
| 19 | 9 | calm |
| 20 | 9 | calm |
| 21 | 9 | calm |
| 22 | 9 | calm |
| 23 | 9 | calm |
| 24 | 9 | calm |
| 25 | 9 | calm |
| 26 | 9 | calm |
| 27 | 9 | calm |
| 28 | 9 | calm |
| 29 | 9 | calm |
| 30 | 9 | calm |
Sunrise & sunset in September
Daylight runs from about 11 h 24 min at the start of September to 12 h 12 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 48 minutes over September. Sunrise moves from 6:56 AM to 6:23 AM, and sunset from 6:23 PM to 6:36 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 11.4 | 11.5 | 11.5 | 11.5 | 11.5 | 11.6 | 11.6 | 11.6 | 11.7 | 11.7 | 11.7 | 11.7 | 11.8 | 11.8 | 11.8 | 11.8 | 11.9 | 11.9 | 11.9 | 12.0 | 12.0 | 12.0 | 12.0 | 12.1 | 12.1 | 12.1 | 12.1 | 12.2 | 12.2 | 12.2 |
| Sunrise (AM) | 6:56 | 6:55 | 6:54 | 6:53 | 6:52 | 6:51 | 6:50 | 6:49 | 6:47 | 6:46 | 6:45 | 6:44 | 6:43 | 6:41 | 6:40 | 6:39 | 6:38 | 6:37 | 6:36 | 6:34 | 6:33 | 6:32 | 6:31 | 6:30 | 6:28 | 6:27 | 6:26 | 6:25 | 6:24 | 6:23 |
| Sunset (PM) | 6:23 | 6:24 | 6:24 | 6:24 | 6:25 | 6:25 | 6:26 | 6:26 | 6:27 | 6:27 | 6:28 | 6:28 | 6:28 | 6:29 | 6:29 | 6:30 | 6:30 | 6:31 | 6:31 | 6:31 | 6:32 | 6:32 | 6:33 | 6:33 | 6:34 | 6:34 | 6:35 | 6:35 | 6:36 | 6:36 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 11.4 | 6:56 | 6:23 |
| 2 | 11.5 | 6:55 | 6:24 |
| 3 | 11.5 | 6:54 | 6:24 |
| 4 | 11.5 | 6:53 | 6:24 |
| 5 | 11.5 | 6:52 | 6:25 |
| 6 | 11.6 | 6:51 | 6:25 |
| 7 | 11.6 | 6:50 | 6:26 |
| 8 | 11.6 | 6:49 | 6:26 |
| 9 | 11.7 | 6:47 | 6:27 |
| 10 | 11.7 | 6:46 | 6:27 |
| 11 | 11.7 | 6:45 | 6:28 |
| 12 | 11.7 | 6:44 | 6:28 |
| 13 | 11.8 | 6:43 | 6:28 |
| 14 | 11.8 | 6:41 | 6:29 |
| 15 | 11.8 | 6:40 | 6:29 |
| 16 | 11.8 | 6:39 | 6:30 |
| 17 | 11.9 | 6:38 | 6:30 |
| 18 | 11.9 | 6:37 | 6:31 |
| 19 | 11.9 | 6:36 | 6:31 |
| 20 | 12.0 | 6:34 | 6:31 |
| 21 | 12.0 | 6:33 | 6:32 |
| 22 | 12.0 | 6:32 | 6:32 |
| 23 | 12.0 | 6:31 | 6:33 |
| 24 | 12.1 | 6:30 | 6:33 |
| 25 | 12.1 | 6:28 | 6:34 |
| 26 | 12.1 | 6:27 | 6:34 |
| 27 | 12.1 | 6:26 | 6:35 |
| 28 | 12.2 | 6:25 | 6:35 |
| 29 | 12.2 | 6:24 | 6:36 |
| 30 | 12.2 | 6:23 | 6:36 |
Solar energy in September
Average shortwave solar energy reaching the ground each day in September, about 4.66 kWh/m².
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 — September's 4.66 kWh/m² falls in the middle.
| 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 4.4 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.6 | 4.6 | 4.6 | 4.6 | 4.6 | 4.6 | 4.6 | 4.7 | 4.7 | 4.7 | 4.7 | 4.7 | 4.7 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.9 | 4.9 | 4.9 |
| Level | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 4.4 | Bright |
| 2 | 4.5 | Bright |
| 3 | 4.5 | Bright |
| 4 | 4.5 | Bright |
| 5 | 4.5 | Bright |
| 6 | 4.5 | Bright |
| 7 | 4.5 | Bright |
| 8 | 4.6 | Bright |
| 9 | 4.6 | Bright |
| 10 | 4.6 | Bright |
| 11 | 4.6 | Bright |
| 12 | 4.6 | Bright |
| 13 | 4.6 | Bright |
| 14 | 4.6 | Bright |
| 15 | 4.7 | Bright |
| 16 | 4.7 | Bright |
| 17 | 4.7 | Bright |
| 18 | 4.7 | Bright |
| 19 | 4.7 | Bright |
| 20 | 4.7 | Bright |
| 21 | 4.8 | Bright |
| 22 | 4.8 | Bright |
| 23 | 4.8 | Bright |
| 24 | 4.8 | Bright |
| 25 | 4.8 | Bright |
| 26 | 4.8 | Bright |
| 27 | 4.8 | Bright |
| 28 | 4.9 | Bright |
| 29 | 4.9 | Bright |
| 30 | 4.9 | Bright |
Is September a good time to visit Puerto Rico?
Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
September 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 September
From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In September, Puerto Rico sees daytime highs around 26°C and nights near 15°C. Worth packing: light clothes, rain gear and sun protection. About 10 days see rain.
UV index in Puerto Rico in September
Clear-sky midday UV in September peaks around 8 — enough to warrant sun protection. 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 September
Average fine-particle pollution (PM2.5) through the year — so you can see where September 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).