Weather in Montevideo in September
September in Montevideo is cool with average temperatures around 13.0°C (55.4°F). Moderate rainfall of 96mm spread over 8 days.
Data Note: Temperature values are 2001–2020 satellite/reanalysis grid averages from NASA POWER and may differ from airport station normals by a few degrees.
Temperature
High
15.5°C
59.9°F
Low
10.5°C
50.9°F
Precipitation
96 mm
3.8 inches
~8 rainy days
Conditions
Humidity
82%
Comparison to Adjacent Months
September is 2.8°C cooler than October.