Average annual temperature is 27.3 °C
Absolute maximum temperature: 36.9 °C
Absolute minimum temperature: 21.4 °C
Number of sunny days: 90 days
Number of rainy days: 275 days
Look at detailed online map of Guastomatal
* Weather data for Guastomatal 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) | 34.0 | 35.9 | 36.4 | 36.9 | 36.5 | 33.1 | 33.4 | 33.4 | 32.8 | 32.0 | 32.1 | 33.9 |
| Average daytime temperature (°C) | 31.2 | 34.2 | 33.0 | 34.9 | 33.7 | 30.4 | 31.1 | 30.7 | 31.1 | 29.6 | 29.9 | 32.0 |
| Average temperature (°C) | 26.5 | 28.2 | 27.5 | 28.9 | 28.5 | 26.7 | 27.2 | 26.9 | 27.0 | 26.0 | 26.3 | 27.7 |
| Average night temperature (°C) | 23.0 | 23.5 | 23.4 | 24.4 | 25.0 | 24.3 | 24.6 | 24.4 | 24.3 | 23.9 | 23.9 | 24.6 |
| Absolute minimum temperature (°C) | 21.7 | 21.4 | 21.7 | 23.4 | 24.1 | 23.4 | 23.6 | 22.8 | 23.3 | 23.0 | 23.0 | 23.5 |
| 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 | 11.5 |
| 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) | 10.6 | 11.1 | 10.6 | 11.2 | 10.0 | 8.6 | 9.0 | 8.6 | 9.0 | 7.4 | 8.5 | 10.2 |
| Precipitation (mm) | 71 | 0 | 114 | 33 | 147 | 387 | 323 | 374 | 234 | 510 | 284 | 49 |
| Sunny days | 15 | 28 | 12 | 11 | 4 | 1 | 1 | 1 | 1 | 0 | 1 | 15 |
| Rainy days | 16 | 0 | 19 | 19 | 27 | 29 | 30 | 30 | 29 | 31 | 29 | 16 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Guastomatal is at