Weather in San Juan (near 18.39°N, 66.08°W), Puerto Rico
Historical monthly conditions · 2021–2025
Monthly averages
Average daily air-temperature lows/highs and peak wind gusts. Rain is the average monthly total.
| Month | Avg low | Avg high | Rain | Cloud cover | Avg peak gust |
|---|---|---|---|---|---|
| January | 23°C | 27°C | 40.4 mm | 40% | 35.1 km/h |
| February | 23°C | 27°C | 61.0 mm | 38% | 38.9 km/h |
| March | 23°C | 28°C | 42.4 mm | 37% | 36.8 km/h |
| April | 23°C | 28°C | 109.6 mm | 50% | 35.7 km/h |
| May | 24°C | 29°C | 106.8 mm | 56% | 34.3 km/h |
| June | 25°C | 30°C | 83.5 mm | 66% | 39.0 km/h |
| July | 26°C | 30°C | 91.4 mm | 60% | 41.1 km/h |
| August | 26°C | 30°C | 112.3 mm | 58% | 37.5 km/h |
| September | 26°C | 30°C | 176.0 mm | 61% | 32.2 km/h |
| October | 26°C | 30°C | 158.5 mm | 59% | 30.6 km/h |
| November | 24°C | 29°C | 103.5 mm | 50% | 32.4 km/h |
| December | 23°C | 28°C | 50.1 mm | 38% | 34.1 km/h |
Weather match by month
Feels like 15°C–30°C · cloud ≤60% · rain ≤0.1 mm/h · gust ≤50 km/h
Feels-like temperature accounts for humidity and wind in shade. Percentages cover 08:00–20:00 local solar time.
| Month | Match rate | |
|---|---|---|
| January | 59.9% | |
| February | 60.4% | |
| March | 59.5% | |
| April | 39.0% | |
| May | 20.8% | |
| June | 9.6% | |
| July | 10.5% | |
| August | 2.5% | |
| September | 0.7% | |
| October | 2.9% | |
| November | 22.8% | |
| December | 55.0% |
About this location and data
- Urban-centre population
- 681,030
- Elevation
- 119 m
- Coordinates
- 18.39°N, 66.08°W
- Urban area
- 244 km²
Weather averages use 4 ERA5 grid cells, weighted by the area of the urban centre in each cell.
2021-2025 recent-weather sample (not a 30-year normal).
How the weather scores are calculated