Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The transition from August to September in San Pedro de Atacama, Chile, brings an average high-temperature of a still moderate 15.9°C (60.6°F), barely different from August's 14.2°C (57.6°F). In San Pedro de Atacama, the September nights descend to a significantly cooler average of 3°C (37.4°F) compared to daytime highs.Humidity
In September, the average relative humidity is 23%.Rainfall
September is the last month it rains in San Pedro de Atacama. During 0.5 rainfall days, in September, San Pedro de Atacama aggregates 1mm (0.04") of precipitation. Throughout the year, there are 23.5 rainfall days, and 58mm (2.28") of precipitation is accumulated.Snowfall
In San Pedro de Atacama, snow does not fall in January through April, August through December.Daylight
In September, the average length of the day is 11h and 58min.On the first day of the month, sunrise is at 06:42 and sunset at 18:22 -04. On the last day of September, in San Pedro de Atacama, sunrise is at 07:13 and sunset at 19:31 -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 San Pedro de Atacama is 9.9h.UV index
The months with the highest UV index in San Pedro de Atacama, Chile, are January through March, August through December, with an average maximum UV index of 4. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the average person.Note: In September, an average UV index of 4 transforms into the following instructions:
Make use of precautions - Suggestions to resist sunburn are communicated. It's recommended to limit sun exposure when its radiation is at its peak during midday. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Frequently asked questions
What are September temperatures in San Pedro de Atacama?
What is the average humidity in September in San Pedro de Atacama?
What is the last month it rains in San Pedro de Atacama?
When it does not snow in San Pedro de Atacama?
What is the average length of the day in September in San Pedro de Atacama?
What time are sunrise and sunset in September in San Pedro de Atacama?
When does Daylight Saving Time (DST) start in September in San Pedro de Atacama?
How long on average sun shines in September in San Pedro de Atacama?
When is the highest UV index in San Pedro de Atacama?
What is the UV index reading in September in San Pedro de Atacama?
Average temperature in September
San Pedro de Atacama, Chile
- Average high temperature in September: 15.9°C
The warmest months (with the highest average high temperature) are January and December (20.6°C).
The month with the lowest average high temperature is July (12.2°C).
- Average low temperature in September: 3°C
The month with the highest average low temperature is February (9.9°C).
The coldest month (with the lowest average low temperature) is July (0.3°C).
Average pressure in September
San Pedro de Atacama, Chile
- Average pressure in September: 1018.9mbar
The months with the highest atmospheric pressure are June and July (1021.2mbar).
The month with the lowest atmospheric pressure is December (1014.7mbar).
Average wind speed in September
San Pedro de Atacama, Chile
- Average wind speed in September: 7.5km/h
The windiest month (with the highest average wind speed) is January (8.5km/h).
The calmest month (with the lowest average wind speed) is April (6.1km/h).
Average humidity in September
San Pedro de Atacama, Chile
- Average humidity in September: 23%
The month with the highest relative humidity is February (46%).
The month with the lowest relative humidity is October (21%).
Average rainfall in September
San Pedro de Atacama, Chile
- Average rainfall in September: 1mm
The wettest month (with the highest rainfall) is February (23mm).
The driest months (with the least rainfall) are October and November (0mm).
Average rainfall days in September
San Pedro de Atacama, Chile
- Average rainfall days in September: 0.5 days
The month with the highest number of rainy days is February (7.7 days).
The month with the least rainy days is November (0.1 days).
Average snowfall in September
San Pedro de Atacama, Chile
- Average snowfall in September: 0mm
The month with the highest snowfall is July (4mm).
The months with the least snowfall are January, February, March, April, August, September, October, November and December (0mm).
Average snowfall days in September
San Pedro de Atacama, Chile
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is July (0.5 days).
The months with the least snowfall days are January, February, March, September, October, November and December (0 days).
Average daylight in September /
Average sunshine in September
San Pedro de Atacama, Chile
- Average daylight in September: 12h and 0min
The month with the longest days is December (Average daylight: 13h and 30min).
The month with the shortest days is June (Average daylight: 10h and 48min).
- Average sunshine in September: 9h and 5min
The months with the most sunshine are April and November (Average sunshine: 10h and 0min).
The month with the least sunshine is June (Average sunshine: 9h and 42min).
Average sunshine days in September
San Pedro de Atacama, Chile
- Average sunshine days in September: 29.5 days
The month with the most sunshine days is October (30.7 days).
The month with the least sunshine days is February (17.8 days).
Average UV index in September
San Pedro de Atacama, Chile
- Average UV index in September: 4
The months with the highest UV index are January, February, March, August, September, October, November and December (UV index 4).
The months with the lowest UV index are April, May, June and July (UV index 3).
Average cloud cover in September
San Pedro de Atacama, Chile
- Average cloud cover in September: 2
The month with the most cloud cover is February (Cloud cover 11).
The months with the least cloud cover are August, September and November (Cloud cover 2).
Average visibility in September
San Pedro de Atacama, 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).
San Pedro de Atacama, Chile
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