Average annual temperature is 15.0 °C
Absolute maximum temperature: 37.6 °C
Absolute minimum temperature: -6.2 °C
Number of sunny days: 187 days
Number of rainy days: 176 days
Number of snow days: 2 days
Look at detailed online map of Rio
* Weather data for Rio United States is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 18.0 | 24.2 | 25.0 | 28.1 | 30.0 | 33.8 | 36.8 | 37.6 | 33.2 | 29.6 | 26.0 | 18.5 |
| Average daytime temperature (°C) | 10.6 | 14.4 | 14.9 | 20.2 | 24.8 | 29.0 | 31.2 | 30.0 | 27.9 | 21.4 | 15.4 | 11.2 |
| Average temperature (°C) | 6.3 | 8.1 | 8.6 | 13.7 | 18.5 | 22.3 | 25.2 | 24.2 | 21.6 | 15.8 | 9.3 | 6.1 |
| Average night temperature (°C) | 2.9 | 3.8 | 3.8 | 8.2 | 13.1 | 16.5 | 20.4 | 19.4 | 16.2 | 11.4 | 4.8 | 2.4 |
| Absolute minimum temperature (°C) | -5.2 | -6.2 | -6.2 | 0.5 | 4.7 | 10.8 | 16.6 | 14.1 | 12.2 | -1.3 | -5.2 | -6.1 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 14.0 | 14.0 | 12.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.9 | 10.8 | 12.0 | 13.2 | 14.2 | 14.7 | 14.4 | 13.6 | 12.4 | 11.2 | 10.2 | 9.6 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 4.8 | 7.1 | 8.1 | 9.7 | 10.6 | 11.0 | 11.3 | 10.5 | 10.6 | 7.5 | 7.7 | 5.9 |
| Precipitation (mm) | 142 | 103 | 162 | 108 | 57 | 102 | 96 | 85 | 24 | 75 | 52 | 98 |
| Sunny days | 10 | 15 | 19 | 18 | 18 | 15 | 8 | 11 | 18 | 18 | 22 | 15 |
| Rainy days | 20 | 12 | 12 | 12 | 13 | 15 | 23 | 20 | 12 | 13 | 8 | 16 |
| Snow days | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Rio during the most sunny months:
The largest precipitation sum in Rio is at