Average annual temperature is 27.4 °C
Absolute maximum temperature: 38.1 °C
Absolute minimum temperature: 18.0 °C
Number of sunny days: 103 days
Number of rainy days: 262 days
Look at detailed online map of Keerisuddan
* Weather data for Keerisuddan 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 | 32.0 | 36.6 | 38.1 | 36.4 | 36.9 | 37.8 | 38.1 | 35.4 | 34.8 | 31.1 | 30.6 |
| Average daytime temperature (°C) | 28.1 | 29.5 | 33.1 | 35.5 | 32.5 | 34.1 | 34.5 | 36.0 | 33.5 | 31.8 | 29.4 | 28.7 |
| Average temperature (°C) | 24.1 | 24.9 | 27.4 | 28.7 | 28.4 | 29.7 | 29.5 | 29.7 | 28.6 | 26.8 | 25.5 | 25.6 |
| Average night temperature (°C) | 20.9 | 21.1 | 23.3 | 24.3 | 25.5 | 26.6 | 26.1 | 25.7 | 25.4 | 23.8 | 23.1 | 23.4 |
| Absolute minimum temperature (°C) | 18.0 | 19.1 | 22.1 | 23.0 | 23.5 | 25.5 | 25.3 | 24.9 | 24.4 | 22.9 | 22.7 | 22.9 |
| 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 | 9.8 | 11.0 | 10.2 | 9.2 | 6.9 | 8.0 |
| Precipitation (mm) | 77 | 81 | 49 | 114 | 91 | 25 | 12 | 34 | 52 | 233 | 440 | 239 |
| Sunny days | 16 | 15 | 7 | 8 | 9 | 13 | 13 | 18 | 1 | 1 | 1 | 1 |
| Rainy days | 15 | 13 | 24 | 22 | 22 | 17 | 18 | 13 | 29 | 30 | 29 | 30 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Keerisuddan is at