Average annual temperature is 26.4 °C
Absolute maximum temperature: 37.3 °C
Absolute minimum temperature: 17.3 °C
Number of sunny days: 67 days
Number of rainy days: 298 days
Look at detailed online map of Atharagallewa
* Weather data for Atharagallewa 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) | 28.8 | 30.0 | 32.7 | 35.2 | 35.2 | 34.6 | 35.2 | 37.3 | 34.2 | 32.7 | 30.5 | 30.5 |
| Average daytime temperature (°C) | 27.5 | 28.2 | 29.9 | 32.5 | 32.5 | 33.6 | 32.5 | 35.1 | 31.9 | 30.9 | 29.3 | 28.3 |
| Average temperature (°C) | 23.3 | 23.9 | 25.2 | 26.8 | 27.9 | 29.1 | 28.4 | 29.2 | 27.5 | 25.9 | 24.8 | 24.6 |
| Average night temperature (°C) | 20.0 | 20.7 | 21.7 | 22.6 | 24.6 | 26.3 | 25.5 | 25.3 | 24.6 | 22.6 | 22.2 | 22.3 |
| Absolute minimum temperature (°C) | 17.3 | 17.5 | 20.5 | 21.1 | 22.7 | 25.1 | 23.8 | 23.8 | 22.6 | 21.2 | 21.6 | 20.6 |
| 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) | 8.4 | 8.8 | 9.5 | 10.3 | 9.3 | 10.7 | 9.7 | 11.0 | 8.7 | 8.5 | 7.2 | 6.4 |
| Precipitation (mm) | 152 | 145 | 123 | 94 | 106 | 8 | 15 | 33 | 52 | 311 | 476 | 385 |
| Sunny days | 7 | 5 | 4 | 4 | 10 | 14 | 8 | 14 | 0 | 1 | 0 | 0 |
| Rainy days | 24 | 23 | 27 | 26 | 21 | 16 | 23 | 17 | 30 | 30 | 30 | 31 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Atharagallewa is at