The temperatures in Montevideo in September are usually low and can range between 11°C and 16°C.
You can expect about 3 to 8 days of rain in Montevideo during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Montevideo in September 2025.
If you’re planning to visit Montevideo in the near future, we highly recommend that you review the 14 day weather forecast for Montevideo before you arrive.
Temperatures
16° / 11°
Rainy Days
6
Snowy Days
0
Dry Days
24
Rainfall
155
mm
Sun Hours
9.4
Hrs