Average annual temperature is 25.6 °C
Absolute maximum temperature: 32.3 °C
Absolute minimum temperature: 22.5 °C
Number of rainy days: 365 days
Look at detailed online map of Seiyum
* Weather data for Seiyum 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) | 31.3 | 31.2 | 30.7 | 30.2 | 31.2 | 31.2 | 30.8 | 31.6 | 31.0 | 32.3 | 31.5 | 31.3 |
| Average daytime temperature (°C) | 29.0 | 28.5 | 28.8 | 28.4 | 29.0 | 28.8 | 29.1 | 29.5 | 29.3 | 29.7 | 29.7 | 29.3 |
| Average temperature (°C) | 25.3 | 25.1 | 25.3 | 25.3 | 25.8 | 25.4 | 25.7 | 25.8 | 25.7 | 26.1 | 26.1 | 26.0 |
| Average night temperature (°C) | 23.4 | 23.3 | 23.4 | 23.4 | 24.0 | 23.5 | 23.9 | 23.6 | 23.8 | 23.9 | 24.1 | 24.3 |
| Absolute minimum temperature (°C) | 22.7 | 22.8 | 22.9 | 22.8 | 23.1 | 22.5 | 23.1 | 22.9 | 22.9 | 23.2 | 23.3 | 23.6 |
| 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) | 7.8 | 6.1 | 7.8 | 6.8 | 7.3 | 8.3 | 8.6 | 9.3 | 8.9 | 9.0 | 8.9 | 6.9 |
| Precipitation (mm) | 336 | 392 | 346 | 469 | 382 | 222 | 265 | 387 | 387 | 333 | 342 | 543 |
| Sunny days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Rainy days | 31 | 28 | 31 | 30 | 31 | 30 | 31 | 31 | 30 | 31 | 30 | 31 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Seiyum is at