Average annual temperature is 4.1 °C
Absolute maximum temperature: 14.6 °C
Absolute minimum temperature: -4.8 °C
Number of sunny days: 49 days
Number of rainy days: 316 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) | 12.5 | 11.4 | 12.8 | 11.6 | 12.4 | 11.6 | 13.9 | 14.6 | 14.1 | 14.1 | 13.6 | 13.4 |
| Average daytime temperature (°C) | 8.4 | 9.5 | 8.5 | 9.4 | 10.0 | 10.3 | 11.9 | 11.9 | 10.9 | 11.1 | 10.8 | 10.5 |
| Average temperature (°C) | 3.0 | 4.2 | 3.5 | 3.8 | 4.2 | 3.3 | 3.7 | 4.0 | 4.2 | 4.9 | 4.6 | 5.2 |
| Average night temperature (°C) | -1.1 | 1.1 | 0.0 | -0.3 | -0.2 | -2.0 | -2.6 | -1.9 | -0.5 | 0.7 | 0.6 | 1.8 |
| Absolute minimum temperature (°C) | -4.6 | -3.2 | -3.6 | -3.2 | -3.5 | -4.8 | -4.5 | -4.0 | -3.0 | -2.3 | -1.4 | -1.4 |
| 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) | 12.6 | 12.4 | 12.2 | 11.9 | 11.7 | 11.6 | 11.6 | 11.8 | 12.0 | 12.3 | 12.6 | 12.7 |
| Daylight minimum duration (h) | 12.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 | 11.0 | 11.0 | 11.0 | 12.0 | 12.0 | 12.0 |
| Sunshine mean duration (h) | 7.5 | 6.8 | 6.7 | 8.9 | 10.1 | 10.7 | 10.7 | 10.9 | 10.4 | 9.5 | 8.1 | 6.9 |
| Precipitation (mm) | 215 | 240 | 256 | 145 | 90 | 27 | 19 | 53 | 140 | 226 | 300 | 302 |
| Sunny days | 0 | 0 | 0 | 1 | 3 | 18 | 18 | 8 | 0 | 0 | 1 | 0 |
| Rainy days | 31 | 28 | 31 | 29 | 28 | 12 | 13 | 23 | 30 | 31 | 29 | 31 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in San Marcos is at