Average annual temperature is 27.4 °C
Absolute maximum temperature: 38.9 °C
Absolute minimum temperature: 17.8 °C
Number of sunny days: 104 days
Number of rainy days: 261 days
Look at detailed online map of Aiyamperumal
* Weather data for Aiyamperumal Sri Lanka is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 29.3 | 31.4 | 35.9 | 38.5 | 37.4 | 37.7 | 37.7 | 38.9 | 35.7 | 35.2 | 31.1 | 30.8 |
| Average daytime temperature (°C) | 28.0 | 29.4 | 32.8 | 35.6 | 32.9 | 34.6 | 35.0 | 36.5 | 33.8 | 31.7 | 29.4 | 28.6 |
| Average temperature (°C) | 23.8 | 24.6 | 27.1 | 28.7 | 28.5 | 29.9 | 29.8 | 29.9 | 28.8 | 26.7 | 25.4 | 25.5 |
| Average night temperature (°C) | 20.4 | 20.6 | 22.9 | 24.0 | 25.3 | 26.6 | 26.3 | 25.7 | 25.5 | 23.7 | 22.9 | 23.3 |
| Absolute minimum temperature (°C) | 17.8 | 17.8 | 21.8 | 22.4 | 23.1 | 25.6 | 25.5 | 24.8 | 24.6 | 22.4 | 22.5 | 23.0 |
| 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) | 11.7 | 11.8 | 12.1 | 12.3 | 12.5 | 12.6 | 12.6 | 12.4 | 12.2 | 11.9 | 11.7 | 11.6 |
| 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) | 9.1 | 10.2 | 10.9 | 10.4 | 9.0 | 10.5 | 9.5 | 11.0 | 10.1 | 9.3 | 7.0 | 7.8 |
| Precipitation (mm) | 79 | 80 | 44 | 139 | 106 | 41 | 20 | 48 | 61 | 267 | 463 | 259 |
| Sunny days | 17 | 16 | 10 | 7 | 9 | 10 | 16 | 15 | 2 | 1 | 0 | 1 |
| Rainy days | 14 | 12 | 21 | 23 | 22 | 20 | 15 | 16 | 28 | 30 | 30 | 30 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Aiyamperumal is at