Average annual temperature is 24.9 °C
Absolute maximum temperature: 34.9 °C
Absolute minimum temperature: 18.3 °C
Number of sunny days: 73 days
Number of rainy days: 292 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) | 32.0 | 34.0 | 34.4 | 34.9 | 34.9 | 29.8 | 32.0 | 31.8 | 28.6 | 28.5 | 29.5 | 30.9 |
| Average daytime temperature (°C) | 29.3 | 32.1 | 31.3 | 32.8 | 31.5 | 27.5 | 28.3 | 27.6 | 27.4 | 26.9 | 26.9 | 29.0 |
| Average temperature (°C) | 24.5 | 26.6 | 25.8 | 26.7 | 26.2 | 24.2 | 24.5 | 24.2 | 24.0 | 23.4 | 23.5 | 24.9 |
| Average night temperature (°C) | 20.8 | 22.5 | 21.7 | 22.3 | 22.4 | 21.8 | 21.9 | 21.8 | 21.4 | 21.2 | 21.3 | 21.8 |
| Absolute minimum temperature (°C) | 18.3 | 20.1 | 19.8 | 20.4 | 20.8 | 20.8 | 20.3 | 20.4 | 20.4 | 20.4 | 20.4 | 18.8 |
| 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) | 11.6 | 11.8 | 12.1 | 12.4 | 12.6 | 12.7 | 12.7 | 12.5 | 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) | 10.2 | 10.7 | 10.4 | 11.2 | 10.0 | 8.2 | 8.5 | 8.4 | 9.1 | 7.1 | 8.4 | 9.9 |
| Precipitation (mm) | 130 | 0 | 81 | 25 | 151 | 435 | 424 | 432 | 320 | 739 | 364 | 66 |
| Sunny days | 10 | 26 | 11 | 11 | 6 | 0 | 0 | 0 | 0 | 0 | 1 | 8 |
| Rainy days | 21 | 2 | 20 | 19 | 25 | 30 | 31 | 31 | 30 | 31 | 29 | 23 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in San Juan Grande is at