The temperatures in Rio Negro in August are quite cold with temperatures between 7°C and 17°C, warm clothes are a must.
The wather in Rio Negro in August can vary between cold and nice weather days. Expect a few rainy days but usually not more than 3.
Our weather forecast can give you a great sense of what weather to expect in Rio Negro in August 2025.
If you’re planning to visit Rio Negro in the near future, we highly recommend that you review the 14 day weather forecast for Rio Negro before you arrive.
Temperatures
17° / 7°
Rainy Days
2
Snowy Days
0
Dry Days
29
Rainfall
44
mm
Sun Hours
10.5
Hrs