September weather forecast
La Serena, Chile

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Weather in September

Amid September, the Chilean city of La Serena embraces the spring season's arrival with moderate rise in weather conditions. Ranging between 13.6°C (56.5°F) to 18.6°C (65.5°F), the temperatures mark this transitional phase. To complement these changes, the sea temperatures and daylight hours also incrementally increase, providing a more balanced environment. Accordingly, a decrease in cloud coverage is observed, providing clearer skies for outdoor activities. Hence, September ushers La Serena into the refreshing ambiance of the spring season.

Temperature

September records an average high-temperature of a still refreshing 18.6°C (65.5°F), indicating a minor variation from the preceding month. During September, the temperature is averaged to a low of 11.7°C (53.1°F) at night.

Humidity

The average relative humidity in September in La Serena, Chile, is 59%.

Rainfall

January, February, April, September and December are months without rainfall.

Sea temperature

In La Serena, the average seawater temperature in September is 13.6°C (56.5°F).
Note: Diving into 13.6°C (56.5°F) when it's under 10°C (50°F) can cause immediate cold shock symptoms, marked by hyperventilation.

Daylight

In La Serena, the average length of the day in September is 11h and 56min.
On the first day of the month, sunrise is at 06:59 and sunset at 18:30 -04. On the last day of September, sunrise is at 07:23 and sunset at 19:46 -03.
Note: On Sunday, 08. September 2024, at 00:00, Daylight Saving Time starts, and the time zone changes from -04 to -03. Daylight Saving Time lasts until Sunday, 06. April 2025, at 00:00; consequently, the time zone reverts from -03 to -04.

Sunshine

In La Serena, Chile, the average sunshine in September is 9.6h.

UV index

The months with the lowest UV index are May through July and September, with an average maximum UV index of 4. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the average person.
Note: The UV index of 4 during September translates into the following guidance:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
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Frequently asked questions

What is the temperature in September in La Serena?

The average high-temperature and low-temperature during September are 18.6°C (65.5°F) and 11.7°C (53.1°F) respectively.

What is the average humidity in September in La Serena?

The average relative humidity in September in La Serena is 59%.

What is the driest month in La Serena?

In La Serena, rain does not fall in January, February, April, September and December.

Does it rain in La Serena in September?

In September, it doesn't rain. August is the latest month when it rains.

How cold is the water in September in La Serena?

In September, the average sea temperature in La Serena, Chile, is 13.6°C (56.5°F). Swimming in 13.6°C (56.5°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation.

What is the average length of the day in September in La Serena?

In September, the average day length in La Serena is 11h and 56min.

When are sunrise and sunset in September in La Serena?

In September, on the first day of the month, sunrise is at 06:59 and sunset at 18:30 -04. On the last day of the month, sunrise is at 07:23 and sunset at 19:46 -03.

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

On Sunday, 08. September 2024, at 00:00, Daylight Saving Time starts in La Serena, and the time zone changes from -04 to -03. DST ends on Sunday, 06. April 2025, at 00:00.

How many hours of sunshine does La Serena have in September?

In La Serena, Chile, the average sunshine duration in September is 9.6h.

What is the month with the lowest UV index in La Serena?

May through July and September, with an average maximum UV index of 4, are months with the lowest UV index.

What is the UV index intensity in September in La Serena?

The average daily maximum UV index in September in La Serena is 4. A UV Index of 3 to 5 symbolizes a moderate health threat from exposure to the Sun's UV radiation.

Average temperature in September
La Serena, Chile

Average temperature in September - La Serena, Chile
  • Average high temperature in September: 18.6°C

The warmest month (with the highest average high temperature) is February (23.6°C).
The month with the lowest average high temperature is July (17.1°C).

  • Average low temperature in September: 11.7°C

The month with the highest average low temperature is February (16.3°C).
The coldest month (with the lowest average low temperature) is July (10.8°C).

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Average pressure in September
La Serena, Chile

Average pressure in September - La Serena, Chile
  • Average pressure in September: 1018.4mbar

The month with the highest atmospheric pressure is July (1019mbar).
The month with the lowest atmospheric pressure is February (1014.2mbar).

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Average wind speed in September
La Serena, Chile

Average wind speed in September - La Serena, Chile
  • Average wind speed in September: 9.6km/h

The windiest month (with the highest average wind speed) is December (10.7km/h).
The calmest months (with the lowest average wind speed) are May and June (7.5km/h).

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Average humidity in September
La Serena, Chile

Average humidity in September - La Serena, Chile
  • Average humidity in September: 59%

The months with the highest relative humidity are January and February (66%).
The month with the lowest relative humidity is June (58%).

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Average rainfall in September
La Serena, Chile

Average rainfall in September - La Serena, Chile
  • Average rainfall in September: 0mm

The wettest month (with the highest rainfall) is June (14mm).
The driest months (with the least rainfall) are January, February, April, September and December (0mm).

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Average rainfall days in September
La Serena, Chile

Average rainfall days in September - La Serena, Chile
  • Average rainfall days in September: 0.8 days

The month with the highest number of rainy days is June (2.3 days).
The month with the least rainy days is November (0.2 days).

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Average sea temperature in September
La Serena, Chile

Average sea temperature in September - La Serena, Chile
  • Average sea temperature in September: 13.6°C

The best month for swimming (with the highest average sea temperature) is February (18.6°C).
The coldest month (with the lowest average sea temperature) is August (13.4°C).

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Average daylight in September /
Average sunshine in September
La Serena, Chile

Average daylight in September / Average sunshine in September - La Serena, Chile
  • Average daylight in September: 11h and 5min

The month with the longest days is December (Average daylight: 14h and 0min).
The month with the shortest days is June (Average daylight: 10h and 18min).

  • Average sunshine in September: 9h and 4min

The month with the most sunshine is February (Average sunshine: 10h and 0min).
The month with the least sunshine is July (Average sunshine: 9h and 6min).

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Average sunshine days in September
La Serena, Chile

Average sunshine days in September - La Serena, Chile
  • Average sunshine days in September: 29.2 days

The month with the most sunshine days is March (30.3 days).
The month with the least sunshine days is February (27.3 days).

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Average UV index in September
La Serena, Chile

Average UV index in September - La Serena, Chile
  • Average UV index in September: 4

The month with the highest UV index is January (UV index 6).
The months with the lowest UV index are May, June, July and September (UV index 4).

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Average cloud cover in September
La Serena, Chile

Average cloud cover in September - La Serena, Chile
  • Average cloud cover in September: 10

The month with the most cloud cover is May (Cloud cover 15).
The month with the least cloud cover is February (Cloud cover 4).

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Average visibility in September
La Serena, Chile

Average visibility in September - La Serena, 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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La Serena, Chile

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