Average annual temperature is 23.2 °C
Absolute maximum temperature: 37.1 °C
Absolute minimum temperature: 10.4 °C
Number of sunny days: 189 days
Number of rainy days: 176 days
Look at detailed online map of San Juan Costa Rica
* Weather data for San Juan Costa Rica Mexico is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 31.5 | 32.8 | 34.0 | 35.4 | 35.7 | 37.1 | 31.4 | 32.4 | 32.9 | 32.3 | 30.3 | 32.1 |
| Average daytime temperature (°C) | 27.5 | 27.8 | 30.5 | 32.8 | 33.1 | 32.7 | 28.6 | 29.6 | 30.9 | 29.0 | 27.2 | 26.0 |
| Average temperature (°C) | 21.1 | 21.2 | 23.2 | 24.9 | 25.4 | 25.7 | 23.4 | 23.7 | 24.0 | 23.0 | 22.0 | 20.7 |
| Average night temperature (°C) | 16.5 | 16.5 | 17.9 | 18.7 | 19.6 | 19.9 | 19.7 | 19.1 | 18.9 | 19.0 | 18.3 | 16.8 |
| Absolute minimum temperature (°C) | 12.5 | 14.3 | 16.2 | 16.4 | 17.5 | 17.7 | 17.6 | 17.1 | 17.8 | 17.1 | 15.4 | 10.4 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 11.0 | 11.0 | 12.0 | 12.0 | 13.0 | 13.0 | 13.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 |
| Daylight mean duration (h) | 11.3 | 11.6 | 12.0 | 12.5 | 12.9 | 13.1 | 13.0 | 12.7 | 12.2 | 11.8 | 11.4 | 11.2 |
| Daylight minimum duration (h) | 11.0 | 11.0 | 11.0 | 12.0 | 12.0 | 13.0 | 12.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 |
| Sunshine mean duration (h) | 10.3 | 10.7 | 10.9 | 11.6 | 11.6 | 11.2 | 10.5 | 10.2 | 10.6 | 9.9 | 8.7 | 9.7 |
| Precipitation (mm) | 0 | 7 | 28 | 2 | 30 | 87 | 137 | 85 | 50 | 112 | 64 | 12 |
| Sunny days | 29 | 22 | 23 | 20 | 11 | 11 | 12 | 9 | 5 | 5 | 17 | 25 |
| Rainy days | 2 | 6 | 8 | 10 | 20 | 19 | 19 | 22 | 25 | 26 | 13 | 6 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in San Juan Costa Rica is at