Average annual temperature is 25.0 °C
Absolute maximum temperature: 34.3 °C
Absolute minimum temperature: 19.0 °C
Number of sunny days: 43 days
Number of rainy days: 322 days
Look at detailed online map of San Juan Grande
* Weather data for San Juan Grande 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) | 32.6 | 34.3 | 32.8 | 33.1 | 33.6 | 30.6 | 31.5 | 31.1 | 30.5 | 29.3 | 31.0 | 31.6 |
| Average daytime temperature (°C) | 29.3 | 32.4 | 30.7 | 31.5 | 30.7 | 28.5 | 29.0 | 28.9 | 29.0 | 27.8 | 28.2 | 29.6 |
| Average temperature (°C) | 24.5 | 26.2 | 25.4 | 26.2 | 25.9 | 24.8 | 24.8 | 24.6 | 24.4 | 23.8 | 24.0 | 25.2 |
| Average night temperature (°C) | 21.4 | 22.7 | 21.7 | 22.1 | 22.5 | 22.0 | 21.9 | 21.8 | 21.2 | 21.4 | 21.2 | 22.2 |
| Absolute minimum temperature (°C) | 19.0 | 21.5 | 19.4 | 19.9 | 20.0 | 20.6 | 20.0 | 20.1 | 20.0 | 20.4 | 20.2 | 20.3 |
| 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) | 10.4 | 10.7 | 10.3 | 11.0 | 9.6 | 7.9 | 8.0 | 8.0 | 8.5 | 6.9 | 7.7 | 10.1 |
| Precipitation (mm) | 151 | 4 | 198 | 102 | 369 | 505 | 540 | 540 | 641 | 824 | 473 | 71 |
| Sunny days | 7 | 16 | 6 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 11 |
| Rainy days | 24 | 12 | 25 | 28 | 31 | 30 | 31 | 31 | 30 | 31 | 29 | 20 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in San Juan Grande is at