Average annual temperature is 26.9 °C
Absolute maximum temperature: 38.7 °C
Absolute minimum temperature: 17.7 °C
Number of sunny days: 42 days
Number of rainy days: 323 days
Look at detailed online map of Aranthalawa
* Weather data for Aranthalawa 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 | 30.6 | 33.9 | 35.6 | 35.8 | 37.3 | 38.7 | 38.5 | 37.0 | 32.8 | 31.9 | 32.2 |
| Average daytime temperature (°C) | 28.1 | 28.9 | 30.8 | 33.2 | 33.5 | 35.8 | 35.8 | 37.2 | 33.9 | 31.4 | 30.0 | 29.1 |
| Average temperature (°C) | 23.9 | 24.6 | 26.0 | 27.4 | 27.9 | 29.5 | 29.6 | 29.8 | 27.5 | 25.9 | 25.3 | 25.2 |
| Average night temperature (°C) | 20.5 | 21.1 | 22.2 | 23.2 | 23.9 | 24.9 | 25.0 | 24.7 | 23.9 | 22.8 | 22.7 | 22.7 |
| Absolute minimum temperature (°C) | 17.7 | 18.5 | 21.5 | 21.8 | 22.8 | 23.9 | 23.8 | 23.7 | 22.2 | 21.8 | 22.2 | 21.8 |
| 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 | 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 | 9.6 | 10.3 | 9.3 | 10.5 | 9.8 | 11.0 | 9.1 | 8.6 | 7.2 | 6.8 |
| Precipitation (mm) | 196 | 138 | 102 | 112 | 124 | 66 | 34 | 44 | 217 | 432 | 546 | 492 |
| Sunny days | 6 | 6 | 6 | 3 | 7 | 1 | 7 | 6 | 0 | 0 | 0 | 0 |
| Rainy days | 25 | 22 | 25 | 27 | 24 | 29 | 24 | 25 | 30 | 31 | 30 | 31 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Aranthalawa is at