September weather forecastArica, Chile

September

Weather in September

As Spring beckons, September warms up from the lower average temperature of 17.8°C (64°F) seen in August. However, this is also when wind speeds are at their peak, reaching an average of 11.8km/h (7.3mph). Expect further warming and wind speed increase, as September gives way to October. Nonetheless, rainfall remains low at only 4mm (0.16") and relative humidity at roughly 78%, indicating an overall comfortable climate. Cloud cover is least likely during this month, with only 10% expected, allowing for plenty visibility throughout September.

Temperature

Arica's average high-temperature in September is a still enjoyable 17.8°C (64°F), indicating a subtle variation from August. Arica's nighttime temperatures in September settle close to daytime highs at an average of 13.6°C (56.5°F).

Humidity

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

Rainfall

In September, the rain falls for 1.8 days. Throughout September, 4mm (0.16") of precipitation is accumulated. Throughout the year, there are 43 rainfall days, and 61mm (2.4") of precipitation is accumulated.

Sea temperature

In Arica, the average seawater temperature in September is 15.3°C (59.5°F).
Note: Swimming is not a pleasant activity for most when the water temperature is 15.3°C (59.5°F). As the water temperature drops from 21°C (69.8°F) to 15°C (59°F), breathing becomes more difficult to control.

Daylight

In Arica, the average length of the day in September is 12h and 0min.
On the first day of September in Arica, sunrise is at 06:48 and sunset at 18:33 -04. On the last day of the month, sunrise is at 07:23 and sunset at 19:38 -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

The average sunshine in September in Arica is 9.7h.

UV index

The months with the lowest UV index are April through November, with an average maximum UV index of 5. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In September, the UV index of 5 transforms into the following advice:
Preventative actions are necessary - Recommendations to ward off sunburn are given. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.

Updated: Jan 24, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

The average high-temperature and low-temperature in Arica during September are 17.8°C (64°F) and 13.6°C (56.5°F) respectively.

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

In Arica, Chile, during September, the rain falls for 1.8 days and regularly aggregates up to 4mm (0.16") of precipitation.

In Arica, the average seawater temperature in September is 15.3°C (59.5°F). For most, swimming in 15.3°C (59.5°F) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 21°C (69.8°F) to 15°C (59°F).

In September, the average day length in Arica is 12h and 0min.

In September, on the first day of the month, sunrise is at 06:48 and sunset at 18:33 -04. On the last day of the month, sunrise is at 07:23 and sunset at 19:38 -03.

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

In September, the average sunshine duration in Arica, Chile, is 9.7h.

The months with the lowest UV index in Arica, Chile, are April through November, with an average maximum UV index of 5.

The average daily maximum UV index in September in Arica, Chile, is 5. A UV Index estimate of 3 to 5 represents a medium health risk from exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year J F M A M J J A September O N D

Aug

September

Oct

Average high temperature

17.4°C

17.8°C

19.1°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

11.6km/h

12.3km/h

13.4km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

2.7

1.8

2.4

Average sea temperature

Average daylight

Average sunshine

Average sunshine days

10.4

13.2

Average UV index

Average cloud cover

10%

13%

Average visibility

10km

Average temperature in September
Arica, Chile

Average high temperature in September: 17.8°C

The warmest month (with the highest average high temperature) is February (23.9°C).
The month with the lowest average high temperature is August (17.4°C).

Average low temperature in September: 13.6°C

The month with the highest average low temperature is February (20.6°C).
The coldest month (with the lowest average low temperature) is August (13.1°C).

Average pressure in September
Arica, Chile

Average pressure in September: 1016mbar

The month with the highest atmospheric pressure is July (1016.7mbar).
The month with the lowest atmospheric pressure is February (1013.1mbar).

Average wind speed in September
Arica, Chile

Average wind speed in September: 11.8km/h

The windiest months (with the highest average wind speed) are October and November (12.3km/h).
The calmest month (with the lowest average wind speed) is February (10.4km/h).

Average humidity in September
Arica, Chile

Average humidity in September: 78%

The months with the highest relative humidity are April and December (82%).
The month with the lowest relative humidity is July (77%).

Average rainfall in September
Arica, Chile

Average rainfall in September: 4mm

The wettest months (with the highest rainfall) are January and February (10mm).
The driest months (with the least rainfall) are April and November (3mm).

Average rainfall days in September
Arica, Chile

Average rainfall days in September: 1.8 days

The month with the highest number of rainy days is January (7.4 days).
The month with the least rainy days is November (1.6 days).

Average sea temperature in September
Arica, Chile

Average sea temperature in September: 15.3°C

The best month for swimming (with the highest average sea temperature) is February (21.8°C).
The coldest month (with the lowest average sea temperature) is August (15°C).

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

Average daylight in September: 12h and 0min

The month with the longest days is December (Average daylight: 13h and 12min).
The month with the shortest days is June (Average daylight: 11h and 0min).

Average sunshine in September: 9h and 42min

The month with the most sunshine is August (Average sunshine: 9h and 54min).
The months with the least sunshine are February and March (Average sunshine: 9h and 12min).

Average sunshine days in September
Arica, Chile

Average sunshine days in September: 11 days

The month with the most sunshine days is December (19.8 days).
The month with the least sunshine days is August (10.4 days).

Average UV index in September
Arica, Chile

Average UV index in September: 5

The months with the highest UV index are January, February, March and December (UV index 6).
The months with the lowest UV index are April, May, June, July, August, September, October and November (UV index 5).

Average cloud cover in September
Arica, Chile

Average cloud cover in September: 10

The month with the most cloud cover is February (Cloud cover 32).
The months with the least cloud cover are August and September (Cloud cover 10).

Average visibility in September
Arica, 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).