Average annual temperature is 22.2 °C
Absolute maximum temperature: 29.5 °C
Absolute minimum temperature: 18.5 °C
Number of sunny days: 2 days
Number of rainy days: 363 days
Look at detailed online map of Siama
* Weather data for Siama 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) | 28.0 | 28.2 | 28.4 | 28.0 | 28.7 | 28.5 | 28.6 | 28.5 | 29.3 | 29.5 | 29.2 | 29.0 |
| Average daytime temperature (°C) | 26.2 | 26.0 | 26.6 | 25.6 | 26.3 | 26.3 | 26.5 | 26.6 | 26.6 | 27.0 | 27.0 | 26.3 |
| Average temperature (°C) | 22.2 | 22.1 | 22.2 | 22.0 | 22.5 | 22.1 | 22.1 | 22.0 | 22.1 | 22.4 | 22.5 | 22.3 |
| Average night temperature (°C) | 19.7 | 19.8 | 19.6 | 19.7 | 20.2 | 19.6 | 19.7 | 19.2 | 19.5 | 19.6 | 19.8 | 20.1 |
| Absolute minimum temperature (°C) | 18.8 | 18.5 | 18.9 | 19.1 | 19.2 | 18.9 | 19.1 | 18.6 | 18.6 | 18.6 | 19.1 | 19.2 |
| 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 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 |
| Daylight mean duration (h) | 12.3 | 12.2 | 12.1 | 12.0 | 12.0 | 11.9 | 11.9 | 12.0 | 12.1 | 12.2 | 12.3 | 12.3 |
| Daylight minimum duration (h) | 12.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 | 11.0 | 11.0 | 12.0 | 12.0 | 12.0 | 12.0 |
| Sunshine mean duration (h) | 7.7 | 6.1 | 7.7 | 6.6 | 6.8 | 8.0 | 8.3 | 9.0 | 8.3 | 8.4 | 8.4 | 6.5 |
| Precipitation (mm) | 319 | 379 | 398 | 462 | 384 | 277 | 351 | 340 | 357 | 307 | 376 | 578 |
| Sunny days | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | 0 | 0 |
| Rainy days | 31 | 28 | 31 | 30 | 31 | 29 | 31 | 30 | 30 | 31 | 30 | 31 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Siama is at