Average annual temperature is 27.1 °C
Absolute maximum temperature: 40.0 °C
Absolute minimum temperature: 18.2 °C
Number of sunny days: 47 days
Number of rainy days: 318 days
Look at detailed online map of Maha Oya
* Weather data for Maha Oya 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) | 29.5 | 30.6 | 33.5 | 35.6 | 36.0 | 37.9 | 39.0 | 40.0 | 36.5 | 32.4 | 32.0 | 31.9 |
| Average daytime temperature (°C) | 27.9 | 28.7 | 30.5 | 33.1 | 33.3 | 36.4 | 36.2 | 37.8 | 33.9 | 31.1 | 30.0 | 29.1 |
| Average temperature (°C) | 23.8 | 24.5 | 25.8 | 27.3 | 27.9 | 30.1 | 30.0 | 30.3 | 27.8 | 26.1 | 25.5 | 25.3 |
| Average night temperature (°C) | 20.6 | 21.1 | 22.1 | 23.0 | 23.8 | 25.3 | 25.5 | 25.1 | 24.0 | 23.0 | 22.9 | 22.9 |
| Absolute minimum temperature (°C) | 18.2 | 18.5 | 21.3 | 21.4 | 22.9 | 24.1 | 24.1 | 24.0 | 22.7 | 22.1 | 22.1 | 22.2 |
| 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 | 12.5 | 12.5 | 12.4 | 12.2 | 12.0 | 11.8 | 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) | 8.8 | 9.1 | 9.5 | 10.2 | 9.3 | 10.5 | 9.7 | 11.0 | 9.1 | 8.5 | 7.0 | 6.8 |
| Precipitation (mm) | 197 | 122 | 102 | 85 | 106 | 65 | 59 | 49 | 197 | 410 | 458 | 478 |
| Sunny days | 7 | 6 | 6 | 6 | 6 | 2 | 7 | 7 | 0 | 0 | 0 | 0 |
| Rainy days | 24 | 22 | 25 | 24 | 25 | 28 | 24 | 24 | 30 | 31 | 30 | 31 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Maha Oya is at