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San Sebastián, Puerto Rico
Full City Profile
11,590
Population
170/sq mi density
253 ft
Elevation
77 meters
78°F
Avg Temperature
26°C
San Sebastián has a warm climate with an average annual temperature of 78°F (26°C). Winters average 74°F in January while summers reach 82°F in July. The area gets 356 sunny days per year. Annual precipitation totals 42.2 inches. The area receives 0.0 inches of snow annually.
Temperature
74°F Jan (23°C)
82°F Jul (28°C)
| Annual Average | 78.3°F |
| 45% above US avg | |
| January Average | 74°F (23°C) |
| July Average | 82°F (28°C) |
| Sunny Days | 356 days/yr |
Geography
| Elevation | 253 ft (77 m) |
| Area | 68.0 sq mi (176.1 km²) |
| Population Density | 170/sq mi |
| Coordinates | 18.3366°N, 66.9902°W |
| Timezone | America/Puerto_Rico |
Precipitation & Snow
Air Quality
Tsunami History
3 tsunamis recorded within 500 km. Highest wave on record: 6.1 m (20 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1918 | PUERTO RICO: MONA PASSAGE | Eruption + Earthquake | 6.1 m | 144 | 46 km |
| 2020 | PUERTO RICO | Earthquake | 0.1 m | 4 | 46 km |
| 1918 | PUERTO RICO | Earthquake | — | — | 26 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 74°F (23°C) | 3.5 in | |
| February | 73°F (23°C) | 3.0 in | Coldest, Driest |
| March | 73°F (23°C) | 3.8 in | |
| April | 75°F (24°C) | 6.0 in | |
| May | 77°F (25°C) | 9.3 in | Wettest |
| June | 78°F (26°C) | 7.2 in | |
| July | 82°F (28°C) | 5.8 in | Warmest |
| August | 78°F (26°C) | 7.8 in | |
| September | 78°F (26°C) | 8.7 in | |
| October | 78°F (25°C) | 8.6 in | |
| November | 76°F (24°C) | 6.6 in | |
| December | 74°F (23°C) | 4.5 in |
San Sebastián has a seasonal temperature swing of 9°F / from 73°F in February to 82°F in July. Total annual precipitation is 74.7 inches, with May being the wettest month (9.3") and February the driest (3.0").