Average annual temperature is 26.7 °C
Absolute maximum temperature: 35.9 °C
Absolute minimum temperature: 21.2 °C
Number of sunny days: 53 days
Number of rainy days: 312 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) | 33.4 | 35.9 | 33.7 | 34.4 | 34.2 | 30.4 | 32.1 | 31.7 | 31.1 | 30.8 | 32.4 | 32.8 |
| Average daytime temperature (°C) | 29.7 | 33.1 | 30.7 | 31.7 | 31.2 | 29.2 | 29.7 | 29.8 | 29.8 | 29.0 | 28.6 | 30.3 |
| Average temperature (°C) | 26.1 | 28.1 | 27.0 | 27.8 | 27.8 | 26.6 | 26.6 | 26.4 | 26.3 | 25.7 | 25.7 | 26.8 |
| Average night temperature (°C) | 23.3 | 25.1 | 24.0 | 24.4 | 24.9 | 24.5 | 24.0 | 23.8 | 23.6 | 23.4 | 23.3 | 23.9 |
| Absolute minimum temperature (°C) | 21.2 | 23.0 | 21.7 | 22.4 | 23.7 | 23.4 | 22.2 | 22.5 | 22.5 | 22.2 | 22.5 | 21.4 |
| 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) | 10.5 | 10.9 | 10.5 | 11.1 | 10.0 | 8.4 | 8.4 | 8.2 | 8.5 | 7.5 | 8.1 | 10.2 |
| Precipitation (mm) | 25 | 2 | 44 | 34 | 142 | 247 | 220 | 241 | 171 | 595 | 252 | 50 |
| Sunny days | 5 | 16 | 7 | 8 | 5 | 0 | 0 | 0 | 0 | 0 | 1 | 11 |
| Rainy days | 26 | 12 | 24 | 22 | 26 | 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