Average annual temperature is 25.8 °C
Absolute maximum temperature: 32.9 °C
Absolute minimum temperature: 18.6 °C
Number of sunny days: 9 days
Number of rainy days: 356 days
Look at detailed online map of Opatha1
* Weather data for Opatha1 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) | 29.8 | 31.5 | 31.5 | 32.9 | 31.1 | 30.4 | 29.9 | 30.8 | 30.5 | 31.1 | 31.2 | 31.3 |
| Average daytime temperature (°C) | 28.9 | 29.8 | 30.5 | 31.1 | 29.7 | 29.3 | 29.2 | 29.9 | 28.7 | 29.1 | 29.7 | 29.7 |
| Average temperature (°C) | 24.6 | 25.3 | 25.9 | 26.5 | 26.7 | 26.5 | 26.4 | 26.7 | 25.5 | 25.3 | 25.3 | 25.4 |
| Average night temperature (°C) | 20.8 | 21.8 | 22.5 | 23.2 | 24.3 | 24.3 | 24.0 | 24.2 | 23.3 | 22.8 | 22.5 | 22.7 |
| Absolute minimum temperature (°C) | 18.6 | 20.1 | 21.6 | 21.6 | 23.3 | 22.7 | 22.2 | 23.2 | 22.5 | 21.5 | 22.0 | 21.7 |
| 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) | 11.8 | 11.9 | 12.1 | 12.3 | 12.4 | 12.5 | 12.4 | 12.3 | 12.2 | 12.0 | 11.8 | 11.8 |
| 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) | 9.4 | 9.6 | 10.2 | 10.3 | 8.4 | 9.7 | 9.5 | 10.7 | 7.0 | 6.8 | 7.2 | 7.6 |
| Precipitation (mm) | 152 | 161 | 218 | 180 | 321 | 339 | 291 | 193 | 666 | 635 | 697 | 440 |
| Sunny days | 6 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Rainy days | 25 | 25 | 31 | 30 | 31 | 30 | 31 | 31 | 30 | 31 | 30 | 31 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Opatha1 is at