Average annual temperature is 27.1 °C
Absolute maximum temperature: 38.2 °C
Absolute minimum temperature: 18.3 °C
Number of sunny days: 96 days
Number of rainy days: 269 days
Look at detailed online map of Periyamadu
* Weather data for Periyamadu 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) | 28.6 | 30.3 | 35.0 | 36.9 | 36.2 | 37.7 | 37.3 | 38.2 | 36.3 | 34.8 | 31.0 | 31.6 |
| Average daytime temperature (°C) | 27.5 | 28.8 | 31.7 | 34.1 | 33.0 | 34.5 | 34.7 | 36.0 | 33.9 | 32.1 | 29.2 | 28.5 |
| Average temperature (°C) | 23.9 | 24.5 | 26.5 | 27.8 | 28.2 | 29.7 | 29.5 | 29.3 | 28.4 | 26.5 | 25.2 | 25.2 |
| Average night temperature (°C) | 21.1 | 21.3 | 22.9 | 23.8 | 25.0 | 26.3 | 26.1 | 25.3 | 25.2 | 23.5 | 22.7 | 23.1 |
| Absolute minimum temperature (°C) | 18.3 | 19.6 | 22.1 | 21.8 | 22.7 | 24.8 | 25.1 | 24.3 | 24.0 | 22.5 | 22.0 | 22.5 |
| 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 | 10.3 | 11.0 | 10.5 | 8.9 | 10.5 | 9.7 | 10.8 | 10.1 | 9.2 | 6.9 | 7.3 |
| Precipitation (mm) | 132 | 102 | 76 | 128 | 139 | 28 | 30 | 87 | 66 | 293 | 541 | 345 |
| Sunny days | 16 | 14 | 8 | 9 | 7 | 9 | 16 | 14 | 1 | 1 | 0 | 1 |
| Rainy days | 15 | 14 | 23 | 21 | 24 | 21 | 15 | 17 | 29 | 30 | 30 | 30 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Periyamadu is at