Average annual temperature is 28.0 °C
Absolute maximum temperature: 42.5 °C
Absolute minimum temperature: 16.2 °C
Number of sunny days: 130 days
Number of rainy days: 235 days
Look at detailed online map of Thiruvallur
* Weather data for Thiruvallur India is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 29.9 | 34.6 | 36.9 | 40.3 | 42.5 | 41.4 | 36.1 | 37.6 | 35.9 | 35.0 | 32.3 | 31.2 |
| Average daytime temperature (°C) | 28.7 | 32.2 | 34.2 | 37.3 | 37.8 | 37.8 | 33.7 | 35.6 | 33.7 | 33.1 | 29.5 | 28.5 |
| Average temperature (°C) | 23.5 | 25.0 | 27.5 | 30.1 | 31.2 | 31.7 | 29.5 | 30.1 | 28.9 | 28.0 | 25.7 | 24.9 |
| Average night temperature (°C) | 19.1 | 19.1 | 22.5 | 24.9 | 26.6 | 27.6 | 26.2 | 26.0 | 25.5 | 24.1 | 23.1 | 21.7 |
| Absolute minimum temperature (°C) | 16.2 | 17.5 | 18.5 | 22.2 | 23.4 | 24.9 | 24.0 | 23.9 | 24.0 | 22.3 | 21.9 | 18.9 |
| 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) | 11.4 | 11.7 | 12.1 | 12.4 | 12.7 | 12.9 | 12.8 | 12.5 | 12.2 | 11.8 | 11.5 | 11.4 |
| 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 | 10.4 | 10.7 | 11.0 | 10.1 | 9.4 | 7.0 | 10.3 | 9.5 | 10.2 | 7.2 | 8.6 |
| Precipitation (mm) | 9 | 0 | 34 | 25 | 122 | 61 | 124 | 101 | 252 | 101 | 357 | 324 |
| Sunny days | 18 | 26 | 16 | 17 | 15 | 8 | 6 | 6 | 4 | 6 | 2 | 6 |
| Rainy days | 13 | 2 | 15 | 13 | 16 | 22 | 25 | 25 | 26 | 25 | 28 | 25 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Thiruvallur is at