September weather forecast
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

Weather in September

The first month of the spring, September, is also a moderate month in Santiago, Chile, with an average temperature fluctuating between 4.4°C (39.9°F) and 15.5°C (59.9°F).

Temperature

In September, the average high-temperature is practically the same as in August - a still moderate 15.5°C (59.9°F). In Santiago, the average low-temperature is 4.4°C (39.9°F).

Humidity

The average relative humidity in September is 53%.

Rainfall

In Santiago, in September, it is raining for 5.8 days, with typically 15mm (0.59") of accumulated precipitation. Throughout the year, there are 45 rainfall days, and 190mm (7.48") of precipitation is accumulated.

Snowfall

In Santiago, snow does not fall in January through May, August through December.

Daylight

In Santiago, the average length of the day in September is 11h and 54min.
On the first day of September in Santiago, sunrise is at 07:00 and sunset at 18:25 -04. On the last day of the month, sunrise is at 07:20 and sunset at 19:44 -03.
Note: On Sunday, 11. September 2022, at 00:00, Daylight Saving Time starts, and the time zone changes from -04 to -03. Daylight Saving Time lasts until Sunday, 02. April 2023, at 00:00; consequently, the time zone reverts from -03 to -04.

Sunshine

In Santiago, the average sunshine in September is 9h.

UV index

May through September, with an average maximum UV index of 3, are months with the lowest UV index in Santiago. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for average individuals.
Note: The average daily UV index of 3 in September transform into the following instructions:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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.
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FAQ

What is the temperature in September in Santiago?

The average high-temperature, in September, in Santiago, is 15.5°C (59.9°F), while the average low-temperature is 4.4°C (39.9°F).

What is the average humidity in September in Santiago?

The average relative humidity in September in Santiago is 53%.

How much does it rain in Santiago in September?

In Santiago, in September, it is raining for 5.8 days, with typically 15mm (0.59") of accumulated precipitation.

When it does not snow in Santiago?

In Santiago, Chile, snow does not fall in January through May, August through December.

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

In Santiago, Chile, the average day length in September is 11h and 54min.

When is the sunrise / sunset in September in Santiago?

In September, on the first day of the month, sunrise is at 07:00 and sunset at 18:25 -04. On the last day of the month, in Santiago, sunrise is at 07:20 and sunset at 19:44 -03.

When does Daylight Saving Time (DST) start in September in Santiago?

On Sunday, 11. September 2022, at 00:00, Daylight Saving Time starts in Santiago, and the time zone changes from -04 to -03. DST ends on Sunday, 02. April 2023, at 00:00.

How long on average sun shines in September in Santiago?

In September, the average sunshine duration is 9h.

What are the months with the lowest UV index in Santiago?

May through September, with an average maximum UV index of 3, are months with the lowest UV index in Santiago, Chile.

What is the UV index reading in September in Santiago?

In Santiago, the average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a medium hazard to health from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover

Average temperature in September
Santiago, Chile

Average temperature in September - Santiago, Chile
  • Average high temperature in September: 15.5°C

The warmest month (with the highest average high temperature) is January (25.5°C).
The month with the lowest average high temperature is July (11.4°C).

  • Average low temperature in September: 4.4°C

The month with the highest average low temperature is January (12.4°C).
The coldest month (with the lowest average low temperature) is July (2.4°C).

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Average pressure in September
Santiago, Chile

Average pressure in September - Santiago, Chile
  • Average pressure in September: 1019mbar

The month with the highest atmospheric pressure is July (1019.6mbar).
The month with the lowest atmospheric pressure is February (1014.4mbar).

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Average wind speed in September
Santiago, Chile

Average wind speed in September - Santiago, Chile
  • Average wind speed in September: 8.3km/h

The windiest month (with the highest average wind speed) is June (9.2km/h).
The calmest months (with the lowest average wind speed) are March and April (7.2km/h).

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Average humidity in September
Santiago, Chile

Average humidity in September - Santiago, Chile
  • Average humidity in September: 53%

The month with the highest relative humidity is July (55%).
The months with the lowest relative humidity are March and April (36%).

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Average rainfall in September
Santiago, Chile

Average rainfall in September - Santiago, Chile
  • Average rainfall in September: 15mm

The wettest month (with the highest rainfall) is June (67mm).
The driest months (with the least rainfall) are January, February and March (1mm).

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Average rainfall days in September
Santiago, Chile

Average rainfall days in September - Santiago, Chile
  • Average rainfall days in September: 5.8 days

The month with the highest number of rainy days is June (7.4 days).
The month with the least rainy days is February (0.7 days).

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Average snowfall in September
Santiago, Chile

Average snowfall in September - Santiago, Chile
  • Average snowfall in September: 0mm

The month with the highest snowfall is June (6mm).
The months with the least snowfall are January, February, March, April, May, August, September, October, November and December (0mm).

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Average snowfall days in September
Santiago, Chile

Average snowfall days in September - Santiago, Chile
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is July (0.3 days).
The months with the least snowfall days are January, February, March, April, May, August, September, October, November and December (0 days).

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Average daylight in September /
Average sunshine in September
Santiago, Chile

Average daylight in September / Average sunshine in September - Santiago, Chile
  • Average daylight in September: 11h and 54min

The month with the longest days is December (Average daylight: 14h and 20min).
The month with the shortest days is June (Average daylight: 9h and 58min).

  • Average sunshine in September: 9h and 0min

The month with the most sunshine is February (Average sunshine: 10h and 0min).
The months with the least sunshine are June and July (Average sunshine: 8h and 18min).

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Average sunshine days in September
Santiago, Chile

Average sunshine days in September - Santiago, Chile
  • Average sunshine days in September: 23.5 days

The month with the most sunshine days is March (29.9 days).
The month with the least sunshine days is June (22.2 days).

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Average UV index in September
Santiago, Chile

Average UV index in September - Santiago, Chile
  • Average UV index in September: 3

The months with the highest UV index are January, February, March, November and December (UV index 5).
The months with the lowest UV index are May, June, July, August and September (UV index 3).

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Average cloud cover in September
Santiago, Chile

Average cloud cover in September - Santiago, Chile
  • Average cloud cover in September: 20

The month with the most cloud cover is June (Cloud cover 26).
The month with the least cloud cover is February (Cloud cover 3).

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Average visibility in September
Santiago, Chile

Average visibility in September - Santiago, Chile
  • Average visibility in September: 10km

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).

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