Average annual temperature is 26.6 °C
Absolute maximum temperature: 37.4 °C
Absolute minimum temperature: 17.8 °C
Number of sunny days: 72 days
Number of rainy days: 293 days
Look at detailed online map of Maha Wannanmaduwa
* Weather data for Maha Wannanmaduwa 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 | 31.2 | 34.0 | 35.7 | 34.5 | 34.0 | 36.5 | 37.4 | 34.8 | 33.9 | 31.5 | 31.6 |
| Average daytime temperature (°C) | 28.2 | 29.4 | 31.6 | 33.6 | 31.8 | 32.7 | 33.1 | 35.2 | 32.4 | 31.4 | 29.9 | 28.9 |
| Average temperature (°C) | 23.8 | 24.7 | 26.5 | 27.6 | 27.5 | 28.2 | 28.2 | 28.8 | 27.2 | 26.0 | 25.2 | 25.2 |
| Average night temperature (°C) | 20.5 | 21.1 | 22.8 | 23.7 | 24.7 | 25.2 | 25.0 | 24.9 | 24.1 | 23.1 | 22.7 | 22.8 |
| Absolute minimum temperature (°C) | 17.8 | 19.1 | 21.3 | 22.3 | 23.4 | 23.9 | 23.8 | 24.3 | 23.3 | 22.3 | 22.1 | 22.1 |
| 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 | 12.6 | 12.5 | 12.4 | 12.2 | 11.9 | 11.7 | 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) | 9.2 | 9.9 | 10.7 | 10.3 | 8.9 | 10.7 | 9.5 | 10.9 | 9.2 | 8.7 | 7.2 | 7.5 |
| Precipitation (mm) | 82 | 103 | 74 | 128 | 121 | 24 | 27 | 66 | 76 | 307 | 502 | 252 |
| Sunny days | 14 | 13 | 5 | 7 | 5 | 6 | 9 | 13 | 0 | 0 | 0 | 0 |
| Rainy days | 17 | 15 | 26 | 23 | 26 | 24 | 22 | 18 | 30 | 31 | 30 | 31 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Maha Wannanmaduwa is at