Average annual temperature is 20.4 °C
Absolute maximum temperature: 29.6 °C
Absolute minimum temperature: 11.3 °C
Number of sunny days: 6 days
Number of rainy days: 359 days
Look at detailed online map of San Bosco
* Weather data for San Bosco 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) | 27.7 | 29.2 | 28.0 | 28.2 | 29.6 | 26.7 | 28.1 | 27.4 | 27.0 | 26.4 | 26.2 | 27.1 |
| Average daytime temperature (°C) | 24.1 | 27.2 | 25.3 | 25.5 | 25.9 | 25.0 | 24.8 | 24.7 | 25.0 | 24.8 | 24.1 | 25.5 |
| Average temperature (°C) | 18.9 | 20.8 | 19.7 | 20.3 | 21.0 | 20.7 | 20.7 | 20.7 | 20.6 | 20.4 | 20.4 | 20.3 |
| Average night temperature (°C) | 14.5 | 15.9 | 15.0 | 15.9 | 17.4 | 17.4 | 17.6 | 17.4 | 17.5 | 17.7 | 17.8 | 16.1 |
| Absolute minimum temperature (°C) | 11.6 | 12.7 | 11.3 | 13.4 | 14.1 | 14.0 | 16.4 | 15.8 | 15.9 | 16.4 | 15.4 | 12.8 |
| 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) | 11.7 | 11.8 | 12.1 | 12.3 | 12.5 | 12.6 | 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) | 10.5 | 11.0 | 9.7 | 10.2 | 9.2 | 8.1 | 7.7 | 8.0 | 8.7 | 7.0 | 7.9 | 10.2 |
| Precipitation (mm) | 101 | 66 | 170 | 137 | 273 | 237 | 237 | 289 | 213 | 511 | 531 | 97 |
| Sunny days | 1 | 3 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| Rainy days | 30 | 25 | 30 | 30 | 31 | 30 | 31 | 31 | 30 | 31 | 30 | 30 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in San Bosco is at