September weather forecast and climate
Mar del Plata, Argentina AR

• Average high temperature in September: 16°C

The warmest month (with the highest average high temperature) is January (26.3°C).
The month with the lowest average high temperature is July (13.1°C).

• Average low temperature in September: 5.3°C

The month with the highest average low temperature is January (14.3°C).
The coldest month (with the lowest average low temperature) is July (3.8°C).

• Average humidity in September: 80%

The month with the highest relative humidity is June (84%).
Months with the lowest relative humidity are January and December (76%).

• Average rainfall in September: 56.4mm

The wettest month (with the highest rainfall) is March (107mm).
The driest month (with the lowest rainfall) is June (54.9mm).

• Average rainfall days in September: 7 days

Months with the highest number of rainy days are October, November and December (10 days).
The month with the lowest number of rainy days is September (7 days).

• Average sea temperature in September: 10.4°C

The best month for swimming (with the highest average sea temperature) is January (20.7°C).
The coldest month (with the lowest average sea temperature) is September (10.4°C).

• Average daylight in September: 11.9h

The month with the longest days is December (Average daylight: 14.8h).
The month with shortest days is June (Average daylight: 9.6h).

• Average sunshine in September: 5.8h

The month with most sunshine is January (Average sunshine: 9.3h).
The month with least sunshine is June (Average sunshine: 4h).

• Average UV index in September: 5

Months with the highest UV index are January and December (UV index 12).
Months with the lowest UV index are June and July (UV index 2).