Average annual temperature is 26.0 °C
Absolute maximum temperature: 36.7 °C
Absolute minimum temperature: 16.7 °C
Number of sunny days: 36 days
Number of rainy days: 329 days
Look at detailed online map of Old San Mariano
* Weather data for Old San Mariano Philippines 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 | 30.5 | 33.3 | 34.3 | 36.7 | 36.6 | 35.1 | 34.8 | 32.6 | 32.9 | 32.1 | 31.9 |
| Average daytime temperature (°C) | 26.2 | 27.5 | 29.0 | 31.6 | 33.5 | 33.6 | 32.5 | 32.6 | 31.5 | 31.1 | 28.8 | 28.7 |
| Average temperature (°C) | 22.8 | 23.4 | 24.0 | 26.5 | 28.1 | 28.1 | 27.7 | 27.9 | 26.8 | 26.5 | 25.0 | 24.6 |
| Average night temperature (°C) | 20.1 | 20.0 | 19.8 | 22.7 | 24.2 | 24.2 | 24.1 | 24.3 | 23.7 | 23.1 | 22.4 | 21.7 |
| Absolute minimum temperature (°C) | 17.0 | 17.0 | 16.7 | 20.8 | 22.7 | 22.5 | 22.7 | 22.9 | 22.1 | 21.3 | 18.5 | 19.2 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 11.0 | 11.0 | 12.0 | 12.0 | 13.0 | 13.0 | 13.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 |
| Daylight mean duration (h) | 11.2 | 11.6 | 12.0 | 12.5 | 12.9 | 13.1 | 13.0 | 12.7 | 12.2 | 11.8 | 11.3 | 11.1 |
| 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) | 5.5 | 8.0 | 10.2 | 10.4 | 10.2 | 10.6 | 8.9 | 9.3 | 9.1 | 8.7 | 7.4 | 7.8 |
| Precipitation (mm) | 139 | 88 | 32 | 105 | 197 | 214 | 362 | 268 | 270 | 93 | 125 | 243 |
| Sunny days | 3 | 6 | 7 | 4 | 1 | 2 | 2 | 7 | 0 | 3 | 1 | 0 |
| Rainy days | 28 | 22 | 24 | 26 | 30 | 28 | 29 | 24 | 30 | 28 | 29 | 31 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Old San Mariano is at