Average annual temperature is 23.9 °C
Absolute maximum temperature: 33.2 °C
Absolute minimum temperature: 14.3 °C
Number of sunny days: 20 days
Number of rainy days: 345 days
Look at detailed online map of Mastatal
* Weather data for Mastatal 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) | 29.5 | 33.2 | 31.9 | 31.6 | 32.1 | 29.6 | 29.8 | 29.7 | 29.2 | 29.5 | 29.2 | 30.6 |
| Average daytime temperature (°C) | 27.6 | 30.5 | 29.3 | 29.7 | 29.6 | 28.0 | 27.7 | 27.6 | 28.0 | 27.7 | 27.2 | 28.5 |
| Average temperature (°C) | 22.7 | 24.0 | 23.8 | 24.4 | 24.8 | 24.2 | 24.0 | 23.9 | 24.0 | 23.6 | 23.5 | 23.9 |
| Average night temperature (°C) | 18.7 | 18.3 | 19.7 | 20.0 | 21.5 | 21.7 | 21.4 | 21.3 | 21.5 | 21.2 | 21.1 | 20.2 |
| Absolute minimum temperature (°C) | 14.3 | 16.2 | 16.0 | 16.7 | 18.2 | 20.4 | 19.4 | 19.0 | 19.8 | 19.9 | 17.9 | 16.7 |
| 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) | 10.4 | 11.0 | 10.1 | 10.8 | 9.3 | 7.3 | 7.8 | 7.8 | 8.1 | 6.8 | 7.7 | 10.3 |
| Precipitation (mm) | 89 | 8 | 171 | 124 | 314 | 331 | 495 | 362 | 363 | 759 | 390 | 108 |
| Sunny days | 3 | 7 | 3 | 1 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 4 |
| Rainy days | 28 | 21 | 28 | 29 | 29 | 30 | 31 | 31 | 30 | 31 | 30 | 27 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Mastatal is at