Average annual temperature is 24.1 °C
Absolute maximum temperature: 34.1 °C
Absolute minimum temperature: 15.7 °C
Number of sunny days: 16 days
Number of rainy days: 349 days
Look at detailed online map of San Isidro
* Weather data for San Isidro 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) | 29.8 | 34.1 | 32.6 | 31.4 | 32.1 | 29.8 | 30.0 | 30.3 | 30.1 | 29.8 | 29.3 | 29.9 |
| Average daytime temperature (°C) | 27.6 | 30.3 | 29.3 | 29.7 | 29.5 | 28.4 | 28.2 | 28.4 | 28.8 | 28.0 | 27.5 | 28.5 |
| Average temperature (°C) | 22.8 | 24.7 | 24.0 | 24.5 | 24.8 | 24.4 | 24.2 | 24.2 | 24.0 | 23.6 | 23.6 | 24.0 |
| Average night temperature (°C) | 18.7 | 19.8 | 19.7 | 20.4 | 21.4 | 21.2 | 21.3 | 21.2 | 21.0 | 20.9 | 21.1 | 20.1 |
| Absolute minimum temperature (°C) | 15.7 | 16.7 | 16.6 | 17.7 | 17.9 | 19.0 | 20.2 | 19.9 | 19.7 | 19.4 | 20.0 | 17.2 |
| 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) | 11.7 | 11.9 | 12.1 | 12.3 | 12.5 | 12.6 | 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) | 10.0 | 10.9 | 9.9 | 10.1 | 8.8 | 7.6 | 6.7 | 7.4 | 7.6 | 6.4 | 6.7 | 9.9 |
| Precipitation (mm) | 59 | 23 | 177 | 122 | 302 | 315 | 396 | 423 | 391 | 564 | 484 | 128 |
| Sunny days | 2 | 3 | 2 | 1 | 3 | 0 | 1 | 0 | 0 | 0 | 0 | 4 |
| Rainy days | 29 | 25 | 29 | 29 | 28 | 30 | 30 | 31 | 30 | 31 | 30 | 27 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit San Isidro during the most sunny months:
The largest precipitation sum in San Isidro is at