Click on a day for an hourly weather forecast
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.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 28° / 20° | 5 | 26 | 0 | 92 mm | Perfect | Montevideo in January |
| February | 26° / 20° | 5 | 23 | 0 | 136 mm | Perfect | Montevideo in February |
| March | 24° / 18° | 4 | 27 | 0 | 106 mm | Perfect | Montevideo in March |
| April | 21° / 16° | 5 | 26 | 0 | 110 mm | Good | Montevideo in April |
| May | 18° / 13° | 4 | 27 | 0 | 101 mm | Good | Montevideo in May |
| June | 14° / 10° | 5 | 25 | 0 | 131 mm | Good | Montevideo in June |
| July | 13° / 9° | 6 | 25 | 0 | 176 mm | Ok | Montevideo in July |
| August | 15° / 10° | 5 | 26 | 0 | 147 mm | Good | Montevideo in August |
| September | 16° / 11° | 6 | 24 | 0 | 155 mm | Good | Montevideo in September |
| October | 19° / 13° | 4 | 27 | 0 | 111 mm | Good | Montevideo in October |
| November | 22° / 15° | 4 | 26 | 0 | 121 mm | Good | Montevideo in November |
| December | 25° / 18° | 4 | 27 | 0 | 99 mm | Perfect | Montevideo in December |