Average annual temperature is 17.6 °C
Absolute maximum temperature: 26.1 °C
Absolute minimum temperature: 9.3 °C
Number of sunny days: 40 days
Number of rainy days: 325 days
Look at detailed online map of Sumu
* Weather data for Sumu Papua New Guinea is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 25.5 | 25.5 | 24.8 | 25.9 | 24.0 | 23.1 | 24.1 | 24.1 | 23.7 | 24.7 | 25.4 | 26.1 |
| Average daytime temperature (°C) | 22.7 | 23.3 | 22.5 | 22.5 | 21.8 | 21.2 | 21.5 | 21.9 | 21.6 | 22.9 | 23.5 | 24.1 |
| Average temperature (°C) | 18.0 | 18.3 | 17.6 | 17.4 | 17.5 | 16.9 | 16.9 | 17.2 | 17.0 | 17.9 | 18.1 | 18.7 |
| Average night temperature (°C) | 14.3 | 14.9 | 13.9 | 13.5 | 14.1 | 13.5 | 13.4 | 14.4 | 13.5 | 14.4 | 13.8 | 14.4 |
| Absolute minimum temperature (°C) | 11.8 | 12.2 | 12.0 | 11.9 | 12.5 | 9.3 | 9.4 | 11.9 | 10.8 | 11.3 | 10.3 | 12.1 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 12.0 | 12.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 | 11.0 | 12.0 | 12.0 | 12.0 | 12.0 |
| Daylight mean duration (h) | 12.5 | 12.4 | 12.1 | 11.9 | 11.8 | 11.7 | 11.7 | 11.9 | 12.1 | 12.3 | 12.5 | 12.6 |
| Daylight minimum duration (h) | 12.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 | 11.0 | 11.0 | 11.0 | 12.0 | 12.0 | 12.0 |
| Sunshine mean duration (h) | 7.9 | 6.8 | 8.0 | 8.5 | 7.2 | 8.6 | 8.6 | 9.2 | 9.3 | 9.5 | 9.9 | 9.9 |
| Precipitation (mm) | 151 | 221 | 233 | 133 | 273 | 68 | 156 | 230 | 155 | 408 | 145 | 184 |
| Sunny days | 3 | 3 | 0 | 0 | 2 | 7 | 8 | 1 | 4 | 1 | 7 | 4 |
| Rainy days | 28 | 25 | 31 | 30 | 29 | 23 | 23 | 30 | 26 | 30 | 23 | 27 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Sumu is at