Average annual temperature is 25.7 °C
Absolute maximum temperature: 33.6 °C
Absolute minimum temperature: 17.2 °C
Number of sunny days: 20 days
Number of rainy days: 345 days
Look at detailed online map of Koshena
* Weather data for Koshena 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) | 30.8 | 31.3 | 32.4 | 33.6 | 31.6 | 30.5 | 30.6 | 31.1 | 30.4 | 31.1 | 30.8 | 31.3 |
| Average daytime temperature (°C) | 29.4 | 30.0 | 30.6 | 31.8 | 29.8 | 29.2 | 29.2 | 30.2 | 28.4 | 28.9 | 29.5 | 29.6 |
| Average temperature (°C) | 24.4 | 25.3 | 26.0 | 26.8 | 26.5 | 26.1 | 25.9 | 26.4 | 25.3 | 25.3 | 25.3 | 25.6 |
| Average night temperature (°C) | 20.2 | 21.5 | 22.5 | 23.4 | 24.3 | 23.8 | 23.3 | 23.4 | 23.3 | 22.9 | 22.8 | 22.7 |
| Absolute minimum temperature (°C) | 17.2 | 19.8 | 21.2 | 22.2 | 23.3 | 22.7 | 22.3 | 22.1 | 22.7 | 22.0 | 21.4 | 20.9 |
| 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 | 12.5 | 12.3 | 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) | 9.1 | 9.4 | 9.8 | 9.6 | 7.5 | 7.6 | 8.5 | 10.7 | 6.0 | 6.5 | 6.7 | 7.5 |
| Precipitation (mm) | 125 | 127 | 177 | 200 | 241 | 411 | 345 | 170 | 736 | 678 | 561 | 488 |
| Sunny days | 11 | 6 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| Rainy days | 20 | 22 | 30 | 29 | 31 | 30 | 31 | 31 | 30 | 31 | 30 | 30 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Koshena during the most sunny months:
The largest precipitation sum in Koshena is at