Average annual temperature is 27.7 °C
Absolute maximum temperature: 40.3 °C
Absolute minimum temperature: 15.5 °C
Number of sunny days: 120 days
Number of rainy days: 245 days
Look at detailed online map of Vallam
* Weather data for Vallam 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) | 29.6 | 34.5 | 36.0 | 38.6 | 40.2 | 40.3 | 37.1 | 37.6 | 36.6 | 34.9 | 31.5 | 32.8 |
| Average daytime temperature (°C) | 28.3 | 32.2 | 33.9 | 36.1 | 37.1 | 36.6 | 34.1 | 36.4 | 33.8 | 33.0 | 29.2 | 28.3 |
| Average temperature (°C) | 22.9 | 25.2 | 27.3 | 29.6 | 30.9 | 31.0 | 29.4 | 30.4 | 28.6 | 27.8 | 25.1 | 24.2 |
| Average night temperature (°C) | 18.3 | 18.6 | 21.8 | 23.9 | 26.1 | 27.1 | 26.1 | 25.8 | 25.0 | 23.3 | 22.5 | 20.9 |
| Absolute minimum temperature (°C) | 15.5 | 17.2 | 17.9 | 21.9 | 23.4 | 25.1 | 24.5 | 24.4 | 23.6 | 21.2 | 21.6 | 18.4 |
| 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) | 11.5 | 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 | 10.7 | 10.8 | 11.3 | 10.0 | 9.0 | 6.5 | 10.2 | 8.8 | 10.3 | 7.8 | 8.3 |
| Precipitation (mm) | 13 | 0 | 75 | 19 | 135 | 104 | 93 | 121 | 211 | 94 | 326 | 94 |
| Sunny days | 17 | 27 | 17 | 17 | 11 | 5 | 4 | 5 | 1 | 7 | 1 | 8 |
| Rainy days | 14 | 1 | 14 | 13 | 20 | 25 | 27 | 26 | 29 | 24 | 29 | 23 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Vallam is at