Average annual temperature is 26.4 °C
Absolute maximum temperature: 36.4 °C
Absolute minimum temperature: 18.9 °C
Number of sunny days: 65 days
Number of rainy days: 300 days
Look at detailed online map of Iddamalpitiya
* Weather data for Iddamalpitiya 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) | 30.4 | 31.8 | 34.1 | 35.2 | 33.8 | 33.2 | 34.6 | 36.4 | 33.5 | 33.0 | 32.0 | 30.7 |
| Average daytime temperature (°C) | 28.6 | 29.9 | 32.0 | 33.2 | 31.4 | 31.7 | 31.4 | 34.1 | 30.8 | 30.6 | 29.9 | 29.2 |
| Average temperature (°C) | 24.1 | 25.0 | 26.7 | 27.4 | 27.3 | 27.7 | 27.5 | 28.4 | 26.4 | 25.8 | 25.3 | 25.4 |
| Average night temperature (°C) | 20.8 | 21.4 | 23.0 | 23.7 | 24.5 | 24.8 | 24.8 | 24.8 | 23.6 | 23.0 | 22.8 | 23.0 |
| Absolute minimum temperature (°C) | 18.9 | 19.6 | 22.0 | 22.4 | 22.9 | 23.7 | 23.4 | 23.8 | 22.2 | 21.8 | 22.0 | 22.3 |
| 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) | 9.2 | 9.8 | 10.7 | 10.1 | 9.0 | 10.3 | 9.4 | 11.0 | 9.0 | 8.3 | 7.4 | 7.5 |
| Precipitation (mm) | 74 | 96 | 99 | 148 | 91 | 36 | 54 | 23 | 83 | 242 | 410 | 242 |
| Sunny days | 15 | 13 | 4 | 5 | 1 | 1 | 8 | 16 | 0 | 0 | 1 | 1 |
| Rainy days | 16 | 15 | 27 | 25 | 30 | 29 | 23 | 15 | 30 | 31 | 29 | 30 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Iddamalpitiya is at