Average annual temperature is 24.5 °C
Absolute maximum temperature: 35.6 °C
Absolute minimum temperature: 14.6 °C
Number of sunny days: 95 days
Number of rainy days: 270 days
Look at detailed online map of Koyama
* Weather data for Koyama 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) | 34.1 | 35.6 | 35.1 | 33.6 | 33.0 | 30.9 | 30.5 | 30.6 | 30.8 | 30.7 | 31.5 | 33.6 |
| Average daytime temperature (°C) | 32.5 | 33.7 | 32.2 | 31.8 | 30.7 | 28.5 | 28.5 | 28.1 | 28.7 | 28.8 | 29.6 | 31.5 |
| Average temperature (°C) | 24.4 | 26.6 | 25.8 | 25.6 | 25.2 | 23.9 | 23.6 | 23.5 | 23.8 | 24.1 | 24.3 | 23.9 |
| Average night temperature (°C) | 17.8 | 21.2 | 21.6 | 22.0 | 22.0 | 21.4 | 21.1 | 21.2 | 21.2 | 21.2 | 20.9 | 18.0 |
| Absolute minimum temperature (°C) | 14.6 | 19.8 | 20.6 | 20.5 | 21.0 | 20.6 | 20.1 | 20.1 | 19.9 | 19.6 | 18.9 | 15.6 |
| 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 | 11.9 | 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) | 10.2 | 9.9 | 9.0 | 8.7 | 7.8 | 7.1 | 7.5 | 6.7 | 8.5 | 8.4 | 9.1 | 10.6 |
| Precipitation (mm) | 24 | 10 | 124 | 147 | 186 | 233 | 302 | 345 | 293 | 160 | 94 | 0 |
| Sunny days | 28 | 18 | 6 | 3 | 0 | 0 | 0 | 0 | 0 | 2 | 8 | 30 |
| Rainy days | 3 | 10 | 25 | 27 | 31 | 30 | 31 | 31 | 30 | 29 | 22 | 1 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Koyama is at