Average annual temperature is 25.6 °C
Absolute maximum temperature: 35.9 °C
Absolute minimum temperature: 17.5 °C
Number of sunny days: 42 days
Number of rainy days: 323 days
Look at detailed online map of San Sebastián
* Weather data for San Sebastián Puerto Rico is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 30.9 | 30.8 | 31.6 | 31.5 | 33.3 | 34.5 | 35.9 | 34.6 | 34.4 | 34.6 | 32.4 | 31.9 |
| Average daytime temperature (°C) | 27.7 | 28.6 | 29.4 | 29.3 | 31.5 | 32.6 | 33.1 | 32.4 | 32.7 | 32.3 | 30.4 | 29.9 |
| Average temperature (°C) | 22.9 | 23.4 | 23.8 | 24.0 | 25.8 | 27.3 | 27.6 | 27.4 | 27.4 | 26.9 | 25.6 | 24.8 |
| Average night temperature (°C) | 19.8 | 20.1 | 19.6 | 19.9 | 21.5 | 23.5 | 23.9 | 24.1 | 23.8 | 23.4 | 22.4 | 21.4 |
| Absolute minimum temperature (°C) | 18.4 | 18.5 | 17.5 | 18.1 | 19.6 | 22.3 | 21.2 | 23.0 | 21.0 | 21.0 | 19.3 | 19.2 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 11.0 | 11.0 | 12.0 | 12.0 | 13.0 | 13.0 | 13.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 |
| Daylight mean duration (h) | 11.2 | 11.5 | 12.0 | 12.6 | 13.0 | 13.2 | 13.1 | 12.7 | 12.2 | 11.7 | 11.3 | 11.1 |
| Daylight minimum duration (h) | 11.0 | 11.0 | 11.0 | 12.0 | 12.0 | 13.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 | 11.0 |
| Sunshine mean duration (h) | 10.0 | 10.4 | 10.5 | 10.9 | 10.9 | 11.7 | 10.4 | 9.4 | 10.6 | 9.9 | 9.2 | 10.0 |
| Precipitation (mm) | 72 | 27 | 40 | 139 | 163 | 100 | 132 | 152 | 93 | 138 | 145 | 19 |
| Sunny days | 8 | 7 | 6 | 1 | 0 | 2 | 1 | 1 | 0 | 2 | 5 | 9 |
| Rainy days | 23 | 21 | 25 | 29 | 31 | 28 | 30 | 30 | 30 | 29 | 25 | 22 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in San Sebastián is at