Average annual temperature is 27.9 °C
Absolute maximum temperature: 33.9 °C
Absolute minimum temperature: 21.9 °C
Number of sunny days: 119 days
Number of rainy days: 246 days
Look at detailed online map of Mannar
* Weather data for Mannar 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) | 30.0 | 31.1 | 32.8 | 33.9 | 32.5 | 32.5 | 31.9 | 31.3 | 31.1 | 31.6 | 31.0 | 29.5 |
| Average daytime temperature (°C) | 28.5 | 29.2 | 30.9 | 31.7 | 31.0 | 31.0 | 30.4 | 30.5 | 30.2 | 29.5 | 28.4 | 28.3 |
| Average temperature (°C) | 26.1 | 26.4 | 28.1 | 29.1 | 29.4 | 29.3 | 28.6 | 28.6 | 28.5 | 27.7 | 26.6 | 26.8 |
| Average night temperature (°C) | 24.0 | 23.9 | 25.6 | 26.5 | 27.9 | 28.1 | 27.4 | 27.2 | 27.1 | 25.9 | 24.9 | 25.3 |
| Absolute minimum temperature (°C) | 21.9 | 22.4 | 24.7 | 25.3 | 24.8 | 26.3 | 26.7 | 26.9 | 26.4 | 24.7 | 24.1 | 24.4 |
| 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) | 11.7 | 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) | 9.6 | 10.4 | 11.2 | 10.9 | 9.3 | 10.5 | 10.0 | 11.2 | 10.5 | 10.0 | 8.0 | 8.7 |
| Precipitation (mm) | 54 | 95 | 32 | 53 | 107 | 37 | 8 | 3 | 33 | 107 | 363 | 187 |
| Sunny days | 17 | 14 | 7 | 5 | 11 | 12 | 22 | 24 | 3 | 2 | 0 | 2 |
| Rainy days | 14 | 14 | 24 | 25 | 20 | 18 | 9 | 7 | 27 | 29 | 30 | 29 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Mannar is at