Average annual temperature is 27.3 °C
Absolute maximum temperature: 38.7 °C
Absolute minimum temperature: 18.0 °C
Number of sunny days: 70 days
Number of rainy days: 295 days
Look at detailed online map of Hathamuna
* Weather data for Hathamuna 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) | 29.4 | 30.8 | 34.1 | 36.5 | 37.1 | 36.6 | 38.0 | 38.7 | 36.8 | 33.9 | 31.0 | 31.2 |
| Average daytime temperature (°C) | 27.9 | 28.9 | 31.1 | 33.9 | 33.4 | 35.4 | 34.9 | 37.1 | 33.9 | 31.4 | 29.7 | 28.8 |
| Average temperature (°C) | 24.0 | 24.7 | 26.3 | 28.1 | 28.5 | 30.1 | 29.6 | 30.3 | 28.5 | 26.4 | 25.5 | 25.4 |
| Average night temperature (°C) | 20.8 | 21.4 | 22.8 | 24.1 | 25.4 | 26.6 | 26.2 | 25.9 | 25.3 | 23.6 | 23.1 | 23.1 |
| Absolute minimum temperature (°C) | 18.0 | 19.1 | 21.8 | 22.6 | 23.8 | 25.4 | 25.1 | 24.8 | 23.8 | 22.4 | 21.9 | 22.0 |
| 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 | 11.8 | 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) | 9.1 | 9.3 | 10.1 | 10.4 | 9.2 | 10.7 | 9.7 | 10.9 | 9.6 | 8.8 | 7.4 | 7.1 |
| Precipitation (mm) | 140 | 133 | 121 | 111 | 167 | 22 | 23 | 54 | 90 | 353 | 569 | 380 |
| Sunny days | 11 | 8 | 7 | 5 | 9 | 8 | 10 | 9 | 3 | 0 | 0 | 0 |
| Rainy days | 20 | 20 | 24 | 25 | 22 | 22 | 21 | 22 | 27 | 31 | 30 | 31 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Hathamuna is at