Average annual temperature is 24.0 °C
Absolute maximum temperature: 34.5 °C
Absolute minimum temperature: 17.5 °C
Number of sunny days: 26 days
Number of rainy days: 339 days
Look at detailed online map of Osao
* Weather data for Osao Republic of the Congo is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 31.7 | 34.5 | 34.1 | 32.0 | 32.1 | 31.3 | 31.2 | 30.7 | 31.1 | 31.8 | 31.2 | 32.9 |
| Average daytime temperature (°C) | 29.5 | 31.8 | 30.6 | 29.6 | 30.1 | 28.8 | 29.4 | 29.3 | 29.1 | 29.0 | 28.8 | 29.4 |
| Average temperature (°C) | 23.6 | 24.6 | 24.1 | 23.9 | 24.2 | 23.6 | 24.1 | 24.0 | 24.0 | 23.9 | 23.6 | 24.2 |
| Average night temperature (°C) | 19.9 | 20.2 | 20.3 | 20.6 | 20.7 | 20.1 | 19.8 | 20.2 | 20.6 | 20.9 | 20.6 | 20.9 |
| Absolute minimum temperature (°C) | 17.5 | 17.7 | 18.3 | 18.8 | 19.9 | 18.5 | 19.0 | 18.6 | 19.6 | 20.0 | 19.6 | 19.5 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 |
| Daylight mean duration (h) | 12.2 | 12.2 | 12.1 | 12.1 | 12.0 | 12.0 | 12.0 | 12.1 | 12.1 | 12.1 | 12.2 | 12.2 |
| Daylight minimum duration (h) | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 |
| Sunshine mean duration (h) | 8.6 | 9.4 | 8.6 | 8.1 | 9.2 | 9.3 | 10.4 | 9.6 | 8.9 | 7.8 | 7.7 | 8.1 |
| Precipitation (mm) | 164 | 100 | 205 | 202 | 149 | 109 | 46 | 102 | 136 | 300 | 262 | 244 |
| Sunny days | 2 | 4 | 3 | 0 | 1 | 3 | 7 | 3 | 1 | 0 | 0 | 2 |
| Rainy days | 29 | 24 | 28 | 30 | 30 | 27 | 24 | 28 | 29 | 31 | 30 | 29 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Osao is at