Average annual temperature is 27.2 °C
Absolute maximum temperature: 38.8 °C
Absolute minimum temperature: 19.8 °C
Number of sunny days: 44 days
Number of rainy days: 321 days
Look at detailed online map of Annamalai
* Weather data for Annamalai 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) | 28.9 | 29.3 | 32.0 | 34.4 | 34.7 | 36.6 | 38.8 | 37.8 | 37.1 | 33.1 | 31.6 | 31.4 |
| Average daytime temperature (°C) | 27.5 | 27.9 | 29.5 | 31.6 | 32.5 | 35.0 | 35.5 | 35.6 | 33.7 | 30.8 | 29.4 | 28.8 |
| Average temperature (°C) | 24.7 | 25.1 | 26.3 | 27.7 | 28.1 | 29.4 | 29.4 | 29.8 | 28.0 | 26.2 | 25.7 | 25.8 |
| Average night temperature (°C) | 22.1 | 22.4 | 23.3 | 24.2 | 24.6 | 25.2 | 24.7 | 25.0 | 24.5 | 23.3 | 23.2 | 23.5 |
| Absolute minimum temperature (°C) | 19.8 | 20.4 | 22.3 | 22.6 | 23.8 | 23.9 | 23.5 | 23.3 | 23.1 | 22.1 | 22.4 | 22.6 |
| 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 | 11.9 | 12.1 | 12.3 | 12.5 | 12.5 | 12.5 | 12.4 | 12.2 | 12.0 | 11.8 | 11.7 |
| 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) | 9.0 | 9.3 | 9.9 | 10.5 | 9.6 | 10.7 | 9.7 | 11.1 | 9.7 | 9.3 | 8.2 | 7.8 |
| Precipitation (mm) | 187 | 167 | 140 | 85 | 109 | 53 | 75 | 45 | 230 | 398 | 533 | 478 |
| Sunny days | 5 | 6 | 8 | 3 | 6 | 1 | 7 | 5 | 1 | 2 | 0 | 0 |
| Rainy days | 26 | 22 | 23 | 27 | 25 | 29 | 24 | 26 | 29 | 29 | 30 | 31 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Annamalai is at