Average annual temperature is 26.5 °C
Absolute maximum temperature: 36.9 °C
Absolute minimum temperature: 18.7 °C
Number of sunny days: 38 days
Number of rainy days: 327 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) | 31.8 | 33.6 | 34.7 | 36.9 | 33.1 | 32.1 | 31.5 | 33.2 | 31.3 | 32.7 | 32.4 | 31.8 |
| Average daytime temperature (°C) | 30.0 | 31.4 | 33.1 | 33.5 | 31.1 | 30.5 | 29.9 | 31.8 | 29.4 | 30.1 | 30.6 | 30.3 |
| Average temperature (°C) | 24.9 | 26.0 | 27.3 | 27.4 | 27.3 | 27.2 | 27.0 | 27.6 | 25.8 | 25.6 | 25.6 | 26.0 |
| Average night temperature (°C) | 21.0 | 21.8 | 23.3 | 23.7 | 24.5 | 24.4 | 24.6 | 24.6 | 23.4 | 22.9 | 22.9 | 23.2 |
| Absolute minimum temperature (°C) | 18.7 | 19.9 | 22.3 | 22.4 | 22.8 | 22.8 | 22.7 | 23.2 | 22.3 | 21.9 | 22.3 | 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 | 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) | 9.4 | 9.8 | 10.7 | 10.2 | 9.2 | 10.1 | 9.7 | 11.0 | 8.0 | 8.3 | 7.6 | 7.8 |
| Precipitation (mm) | 88 | 110 | 112 | 194 | 216 | 143 | 124 | 52 | 338 | 400 | 654 | 277 |
| Sunny days | 17 | 14 | 1 | 0 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 3 |
| Rainy days | 14 | 14 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 31 | 30 | 28 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Koshena is at