Santiago
Chile
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Santiago, Chile

Breathtaking view of the cityscape of Santiago, Chile, with the Andean Mountain Ranges in the distance
Breathtaking view of the cityscape of Santiago, Chile, with the Andean Mountain Ranges in the distance
The first month of the spring, September, is also an enjoyable month in Santiago, Chile, with average temperature ranging between max 18.4°C (65.1°F) and min 5.2°C (41.4°F).

Temperature

In September, the average high-temperature is practically the same as in August - a still enjoyable 18.4°C (65.1°F). In September, the average low-temperature is 5.2°C (41.4°F).

Humidity

In September, the average relative humidity is 78%.

Rainfall

In Santiago, during September, the rain falls for 5 days and regularly aggregates up to 22.5mm (0.9") of precipitation. In Santiago, during the entire year, the rain falls for 37 days and collects up to 281.9mm (11.1") of precipitation.

Daylight

In Santiago, the average length of the day is 11.9h.

Sunshine

The average sunshine in September is 6.2h.

UV index

The average daily maximum UV index in Santiago is 6. A UV Index of 6 to 7 symbolizes a high health hazard from the exposure to the Sun's UV rays for average individuals.
The daily maximum UV index of 6 in September interpret into the following advice:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.

What is the temperature in September in Santiago?

The average high-temperature, in September, in Santiago, is 18.4°C (65.1°F), while the average low-temperature is 5.2°C (41.4°F).

What is the average humidity in September in Santiago?

In Santiago, Chile, the average relative humidity in September is 78%.

How many days does it rain in September in Santiago?

In Santiago, Chile, in September, it is raining for 5 days, with typically 22.5mm (0.9") of accumulated precipitation.

What is the average length of the day in September in Santiago?

In September, the average length of the day is 11.9h.

How long on average sun shines in September in Santiago?

In Santiago, the average sunshine in September is 6.2h.

What is the UV index reading in September in Santiago?

In Santiago, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health risk from the exposure to the Sun's UV rays.
Average temperature in September - Santiago, Chile
  • Average high temperature in September: 18.4°C

The warmest month (with the highest average high temperature) is January (29.4°C).
The month with the lowest average high temperature is July (14.3°C).

  • Average low temperature in September: 5.2°C

The month with the highest average low temperature is January (11.8°C).
The coldest month (with the lowest average low temperature) is July (2.5°C).

Average humidity in September - Santiago, Chile
  • Average humidity in September: 78%

Months with the highest relative humidity are June and July (84%).
The month with the lowest relative humidity is January (57%).

Average rainfall in September - Santiago, Chile
  • Average rainfall in September: 22.5mm

The wettest month (with the highest rainfall) is June (69.8mm).
The driest month (with the lowest rainfall) is January (0.3mm).

Average rainfall days in September - Santiago, Chile
  • Average rainfall days in September: 5 days

Months with the highest number of rainy days are June and July (7 days).
Months with the lowest number of rainy days are January, February and December (0 days).

Average daylight in September / Average sunshine in September - Santiago, Chile
  • Average daylight in September: 11.9h

The month with the longest days is December (Average daylight: 14.3h).
The month with shortest days is June (Average daylight: 10h).

  • Average sunshine in September: 6.2h

The month with most sunshine is January (Average sunshine: 11.7h).
The month with least sunshine is June (Average sunshine: 4h).

Average UV index in September - Santiago, Chile
  • Average UV index in September: 6

Months with the highest UV index are January, February and December (UV index 12).
Months with the lowest UV index are June and July (UV index 3).