Average annual temperature is 18 °C
Absolute maximum temperature: 25.1 °C
Absolute minimum temperature: 11.6 °C
Number of sunny days: 73
Number of rainy days: 292
Number of snow days:
Average annual precipitation: 3769 mm
Look at detailed online map of San Marcos
* Weather data for San Marcos Costa Rica is based on climate observations for 2023 year
| Jan | Feb | Mar | Apr | Maggio | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 22.8 | 24.2 | 23.5 | 24.4 | 25.1 | 24.1 | 24.2 | 23.9 | 22.5 | 22 | 23.2 | 24.1 |
| Average daytime temperature (°C) | 21.2 | 23.1 | 21.6 | 22.1 | 22.4 | 21.2 | 21.7 | 21.6 | 21.3 | 20.5 | 20.9 | 22.6 |
| Average temperature (°C) | 17.4 | 18.6 | 17.7 | 18.1 | 18.8 | 18.2 | 18.3 | 18 | 17.9 | 17.5 | 17.7 | 18.4 |
| Average night temperature (°C) | 14.6 | 15.3 | 14.5 | 15 | 16.2 | 15.9 | 15.6 | 15.1 | 15 | 15.3 | 15.3 | 15.4 |
| Absolute minimum temperature (°C) | 13 | 13.2 | 12 | 12.6 | 14.9 | 15.1 | 14.1 | 13.5 | 13.8 | 14.3 | 14.3 | 11.6 |
| Jan | Feb | Mar | Apr | Maggio | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 11.7 | 11.9 | 12.2 | 12.5 | 12.7 | 12.7 | 12.7 | 12.5 | 12.3 | 12 | 11.8 | 11.6 |
| 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) | 11.6 | 11.7 | 11.9 | 12.2 | 12.5 | 12.7 | 12.6 | 12.3 | 12.1 | 11.8 | 11.6 | 11.6 |
| Sunshine mean duration (h) | 10.3 | 10.9 | 10 | 10.6 | 9.2 | 7.9 | 8.3 | 8.4 | 8.9 | 6.9 | 8.5 | 10.4 |
| Precipitation (mm) | 92 | 10 | 234 | 151 | 305 | 433 | 425 | 380 | 404 | 887 | 367 | 81 |
| Sunny days | 13 | 23 | 6 | 3 | 4 | 3 | 1 | 2 | 18 | |||
| Rainy days | 18 | 5 | 25 | 27 | 27 | 30 | 28 | 30 | 30 | 31 | 28 | 13 |
The largest precipitation sum in San Marcos is at