Average annual temperature is 26.6 °C
Absolute maximum temperature: 37.8 °C
Absolute minimum temperature: 17.8 °C
Number of sunny days: 38 days
Number of rainy days: 327 days
Look at detailed online map of San Marcos
* Weather data for San Marcos Peru is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 33.0 | 32.2 | 31.9 | 32.1 | 31.9 | 31.3 | 33.2 | 34.9 | 37.4 | 37.8 | 36.9 | 33.0 |
| Average daytime temperature (°C) | 30.1 | 29.5 | 29.4 | 29.6 | 29.3 | 28.8 | 30.7 | 32.2 | 33.6 | 34.1 | 32.6 | 30.7 |
| Average temperature (°C) | 25.9 | 25.8 | 25.8 | 25.9 | 26.1 | 25.1 | 26.3 | 27.4 | 28.2 | 28.7 | 27.6 | 26.8 |
| Average night temperature (°C) | 23.3 | 23.5 | 23.5 | 23.7 | 24.0 | 22.6 | 23.2 | 24.0 | 24.6 | 25.1 | 24.7 | 24.3 |
| Absolute minimum temperature (°C) | 20.7 | 22.4 | 22.7 | 22.6 | 22.4 | 17.8 | 21.6 | 21.1 | 23.2 | 23.6 | 23.2 | 23.3 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 12.0 | 12.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 | 11.0 | 12.0 | 12.0 | 12.0 | 12.0 |
| Daylight mean duration (h) | 12.4 | 12.3 | 12.1 | 12.0 | 11.9 | 11.8 | 11.8 | 11.9 | 12.1 | 12.2 | 12.4 | 12.4 |
| Daylight minimum duration (h) | 12.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 | 11.0 | 11.0 | 12.0 | 12.0 | 12.0 | 12.0 |
| Sunshine mean duration (h) | 8.4 | 8.1 | 7.5 | 7.7 | 8.8 | 9.1 | 10.1 | 10.6 | 10.2 | 10.0 | 9.5 | 8.5 |
| Precipitation (mm) | 270 | 278 | 295 | 244 | 184 | 101 | 87 | 90 | 101 | 90 | 176 | 272 |
| Sunny days | 1 | 0 | 1 | 1 | 0 | 4 | 10 | 9 | 6 | 3 | 2 | 1 |
| Rainy days | 30 | 28 | 30 | 29 | 31 | 26 | 21 | 22 | 24 | 28 | 28 | 30 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in San Marcos is at