Climate averages 1991–2020
Carolina weather
in August.
A hot, wet month: the warmest and the 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a hot month in Carolina: daytime highs average 31.1°C and nights cool to about 24.9°C. By daytime temperature it is the warmest month of the year.
Expect about 95 mm of rain on roughly 19 days, which makes August a wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 45 min on an average August day.
The nearest other city in this atlas is San Juan (18 km away). In August its highs average 31.5°C, about as warm as Carolina, with 95 mm of rain.
Among the 7 cities listed in Puerto Rico, Carolina ranks 5th of 7 for the warmest August highs and joint 4th of 7 for the driest August (rainfall, lowest first). The mean August high of those 7 cities is 31.1°C; Carolina is level with that mean.
From August to September, average highs fall by 0.2°C to 30.9°C, and monthly rainfall rises from 95 mm to 131 mm.
The annual picture
August 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
Carolina climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 27.6°C21.8°C | 21.8°C | 39 | 10.4 | 11.211 h |
| February | 28.2°C21.6°C | 21.6°C | 29 | 7.7 | 11.512 h |
| March | 28.9°C21.7°C | 21.7°C | 39 | 8.4 | 12.012 h |
| April | 29.6°C22.5°C | 22.5°C | 72 | 11.0 | 12.513 h |
| May | 30.0°C23.6°C | 23.6°C | 112 | 16.1 | 13.013 h |
| June | 30.8°C24.5°C | 24.5°C | 68 | 13.8 | 13.213 h |
| July | 31.0°C24.7°C | 24.7°C | 80 | 16.4 | 13.113 h |
| August, selected | 31.1°C24.9°C | 24.9°C | 95 | 18.7 | 12.713 h |
| September | 30.9°C24.6°C | 24.6°C | 131 | 20.8 | 12.312 h |
| October | 30.2°C24.2°C | 24.2°C | 124 | 20.5 | 11.712 h |
| November | 28.7°C23.3°C | 23.3°C | 112 | 18.2 | 11.311 h |
| December | 27.9°C22.4°C | 22.4°C | 48 | 12.2 | 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
August in nearby cities
- San Juan in AugustPuerto Rico · 18 kmHigh 31.5°C · Low 24.7°C · 95 mm rain
- Caguas in AugustPuerto Rico · 19 kmHigh 30.3°C · Low 24.8°C · 127 mm rain
- Bayamón in AugustPuerto Rico · 21 kmHigh 31.6°C · Low 24.8°C · 79 mm rain
- Arecibo in AugustPuerto Rico · 81 kmHigh 31.7°C · Low 24.7°C · 101 mm rain
- Ponce in AugustPuerto Rico · 82 kmHigh 30.5°C · Low 24.8°C · 77 mm rain
- Mayagüez in AugustPuerto Rico · 126 kmHigh 31.3°C · Low 25.8°C · 67 mm rain
- Punta Cana in AugustDominican Republic · 259 kmHigh 28.9°C · Low 26.1°C · 105 mm rain
- Salvaleón de Higüey in AugustDominican Republic · 291 kmHigh 30.3°C · Low 24.5°C · 88 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 Carolina) is explained once on the Carolina year overview and on the Sources, method and limits page.
San Juan lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.