Average annual temperature is 26.5 °C
Absolute maximum temperature: 37.4 °C
Absolute minimum temperature: 18.1 °C
Number of sunny days: 85 days
Number of rainy days: 280 days
Look at detailed online map of Gonumeruwewa
* Weather data for Gonumeruwewa 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) | 29.3 | 31.3 | 34.2 | 35.5 | 34.9 | 34.5 | 37.0 | 37.4 | 35.1 | 33.3 | 31.5 | 31.3 |
| Average daytime temperature (°C) | 28.1 | 29.5 | 31.6 | 33.6 | 32.2 | 33.3 | 33.8 | 35.2 | 32.6 | 31.5 | 29.6 | 28.6 |
| Average temperature (°C) | 23.7 | 24.5 | 26.2 | 27.4 | 27.5 | 28.5 | 28.4 | 28.7 | 27.3 | 25.8 | 24.9 | 24.9 |
| Average night temperature (°C) | 20.7 | 20.9 | 22.7 | 23.5 | 24.6 | 25.2 | 25.1 | 24.7 | 24.1 | 23.0 | 22.4 | 22.6 |
| Absolute minimum temperature (°C) | 18.1 | 18.6 | 21.8 | 22.0 | 23.0 | 24.1 | 24.2 | 23.8 | 23.4 | 21.9 | 21.7 | 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 | 12.6 | 12.4 | 12.2 | 11.9 | 11.7 | 11.6 |
| 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) | 9.2 | 9.9 | 10.7 | 10.3 | 8.8 | 10.6 | 9.5 | 10.8 | 9.3 | 8.8 | 7.0 | 7.2 |
| Precipitation (mm) | 98 | 95 | 77 | 124 | 142 | 18 | 30 | 89 | 58 | 343 | 469 | 281 |
| Sunny days | 15 | 16 | 8 | 7 | 7 | 7 | 8 | 15 | 0 | 1 | 1 | 0 |
| Rainy days | 16 | 12 | 23 | 23 | 24 | 23 | 23 | 16 | 30 | 30 | 29 | 31 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Gonumeruwewa is at