Average annual temperature is 27.3 °C
Absolute maximum temperature: 38.2 °C
Absolute minimum temperature: 17.4 °C
Number of sunny days: 98 days
Number of rainy days: 267 days
Look at detailed online map of Chemmantheevu
* Weather data for Chemmantheevu 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) | 30.3 | 33.4 | 35.1 | 38.2 | 34.2 | 34.7 | 35.5 | 36.5 | 33.3 | 33.0 | 32.3 | 30.4 |
| Average daytime temperature (°C) | 28.7 | 30.4 | 33.3 | 34.4 | 31.9 | 32.6 | 32.8 | 34.1 | 31.8 | 31.3 | 30.1 | 29.2 |
| Average temperature (°C) | 24.2 | 25.1 | 27.5 | 28.3 | 28.6 | 29.4 | 29.1 | 29.3 | 28.4 | 26.9 | 25.6 | 25.7 |
| Average night temperature (°C) | 20.5 | 20.8 | 23.1 | 23.8 | 25.9 | 27.2 | 26.5 | 26.2 | 25.7 | 23.8 | 22.9 | 23.2 |
| Absolute minimum temperature (°C) | 17.4 | 18.4 | 21.1 | 21.9 | 23.5 | 25.9 | 25.8 | 25.4 | 24.3 | 22.4 | 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 | 11.8 | 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) | 9.3 | 10.2 | 10.9 | 10.7 | 9.1 | 10.6 | 10.0 | 11.1 | 10.4 | 9.6 | 7.2 | 8.2 |
| Precipitation (mm) | 83 | 92 | 50 | 114 | 98 | 31 | 16 | 35 | 78 | 218 | 461 | 218 |
| Sunny days | 16 | 16 | 6 | 3 | 9 | 11 | 13 | 22 | 0 | 0 | 1 | 1 |
| Rainy days | 15 | 12 | 25 | 27 | 22 | 19 | 18 | 9 | 30 | 31 | 29 | 30 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Chemmantheevu is at