Average annual temperature is 21.9 °C
Absolute maximum temperature: 30.6 °C
Absolute minimum temperature: 15.7 °C
Number of sunny days: 51 days
Number of rainy days: 314 days
Look at detailed online map of San Martín Norte
* Weather data for San Martín Norte Costa Rica is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 27.0 | 26.9 | 29.6 | 30.1 | 30.6 | 27.6 | 28.3 | 28.5 | 27.8 | 26.6 | 26.6 | 26.7 |
| Average daytime temperature (°C) | 24.6 | 24.6 | 26.1 | 27.7 | 28.3 | 25.8 | 26.1 | 26.3 | 26.3 | 24.6 | 24.8 | 24.5 |
| Average temperature (°C) | 20.9 | 21.0 | 21.6 | 22.5 | 23.3 | 22.3 | 22.4 | 22.3 | 22.2 | 21.4 | 21.5 | 21.3 |
| Average night temperature (°C) | 18.4 | 18.8 | 18.7 | 18.9 | 19.8 | 19.6 | 20.0 | 19.8 | 19.4 | 19.3 | 19.4 | 19.0 |
| Absolute minimum temperature (°C) | 15.7 | 17.7 | 17.0 | 17.5 | 18.4 | 18.1 | 17.5 | 17.9 | 18.1 | 18.0 | 18.3 | 16.8 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 11.0 | 11.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 11.0 | 11.0 |
| Daylight mean duration (h) | 11.6 | 11.8 | 12.1 | 12.4 | 12.6 | 12.7 | 12.7 | 12.5 | 12.2 | 11.9 | 11.7 | 11.5 |
| Daylight minimum duration (h) | 11.0 | 11.0 | 11.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 |
| Sunshine mean duration (h) | 9.2 | 9.7 | 9.8 | 10.7 | 9.5 | 8.2 | 8.0 | 7.7 | 9.0 | 6.7 | 7.3 | 8.2 |
| Precipitation (mm) | 41 | 44 | 97 | 38 | 111 | 266 | 129 | 274 | 181 | 749 | 275 | 40 |
| Sunny days | 8 | 5 | 6 | 11 | 5 | 3 | 0 | 2 | 1 | 0 | 2 | 8 |
| Rainy days | 23 | 23 | 25 | 19 | 26 | 27 | 31 | 29 | 29 | 31 | 28 | 23 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in San Martín Norte is at