Average annual temperature is 16.2 °C
Absolute maximum temperature: 22.8 °C
Absolute minimum temperature: 8.3 °C
Number of sunny days: 5 days
Number of rainy days: 360 days
Look at detailed online map of San Rafael de Irazú
* Weather data for San Rafael de Irazú 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) | 20.6 | 19.8 | 21.0 | 21.5 | 22.7 | 22.2 | 21.5 | 22.8 | 21.8 | 21.2 | 21.2 | 20.4 |
| Average daytime temperature (°C) | 18.2 | 18.4 | 19.0 | 19.7 | 21.3 | 21.1 | 20.0 | 20.4 | 20.5 | 20.0 | 19.4 | 18.6 |
| Average temperature (°C) | 14.6 | 14.7 | 15.1 | 15.4 | 17.1 | 17.3 | 16.8 | 17.0 | 16.8 | 16.8 | 16.5 | 15.7 |
| Average night temperature (°C) | 11.5 | 11.6 | 11.9 | 11.6 | 13.6 | 14.0 | 14.1 | 14.2 | 13.5 | 14.2 | 14.2 | 13.6 |
| Absolute minimum temperature (°C) | 8.9 | 9.2 | 9.2 | 8.3 | 11.7 | 12.8 | 12.9 | 12.4 | 12.2 | 12.3 | 12.9 | 11.1 |
| 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 | 12.3 | 12.6 | 12.7 | 12.6 | 12.4 | 12.2 | 11.9 | 11.7 | 11.6 |
| 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) | 8.5 | 8.6 | 7.9 | 8.8 | 9.0 | 7.8 | 8.0 | 8.6 | 9.2 | 6.7 | 7.1 | 7.5 |
| Precipitation (mm) | 156 | 69 | 180 | 170 | 192 | 200 | 290 | 283 | 181 | 395 | 457 | 200 |
| Sunny days | 2 | 0 | 1 | 0 | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 0 |
| Rainy days | 29 | 28 | 30 | 30 | 30 | 30 | 31 | 31 | 29 | 31 | 30 | 31 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in San Rafael de Irazú is at