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
With the transition into September, Portillo notes an average high-temperature of a wintry 0°C (32°F), closely resembling August. During September, the average low-temperature is an extreme cold -11.7°C (10.9°F).Humidity
September and October, with an average relative humidity of 63%, are the most humid months in Portillo, Chile.Rainfall
In September, the rain falls for 4.4 days. Throughout September, 26mm (1.02") of precipitation is accumulated. In Portillo, during the entire year, the rain falls for 44.7 days and collects up to 314mm (12.36") of precipitation.Snowfall
January through December are months with snowfall in Portillo, Chile. In Portillo, in September, during 9.5 snowfall days, 207mm (8.15") of snow is typically accumulated. In Portillo, during the entire year, snow falls for 75.2 days and aggregates up to 2183mm (85.94") of snow.Daylight
In September, the average length of the day in Portillo is 11h and 55min.On the first day of September, sunrise is at 06:56 and sunset at 18:23 -04. On the last day of the month, sunrise is at 07:18 and sunset at 19:42 -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 Portillo, the average sunshine in September is 8.8h.UV index
The months with the lowest UV index in Portillo, Chile, are April through November, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: In September, the maximum UV index of 2 suggests this advice:
Despite most people tolerating extended sun exposure, it is critical to always protect those with sensitive skin, infants, and children. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Frequently asked questions
How cold is September in Portillo?
What are the most humid months in Portillo?
What is the average humidity in September in Portillo?
How much does it rain in Portillo in September?
How many days does it snow in September in Portillo?
How many hours of daylight does Portillo have in September?
When is the sunrise / sunset in September in Portillo?
When does Daylight Saving Time (DST) start in September in Portillo?
How many hours of sunshine does Portillo have in September?
When is the lowest UV index in Portillo?
What is the UV index reading in September in Portillo?
Average temperature in September
Portillo, Chile
- Average high temperature in September: 0°C
The warmest month (with the highest average high temperature) is January (12°C).
The month with the lowest average high temperature is July (-2.3°C).
- Average low temperature in September: -11.7°C
The month with the highest average low temperature is January (2.5°C).
The coldest month (with the lowest average low temperature) is July (-12.2°C).
Average pressure in September
Portillo, Chile
- Average pressure in September: 1018.6mbar
The month with the highest atmospheric pressure is July (1019.4mbar).
The months with the lowest atmospheric pressure are January, February and December (1014.2mbar).
Average wind speed in September
Portillo, Chile
- Average wind speed in September: 9.7km/h
The windiest month (with the highest average wind speed) is December (10.1km/h).
The calmest month (with the lowest average wind speed) is May (8.7km/h).
Average humidity in September
Portillo, Chile
- Average humidity in September: 63%
The months with the highest relative humidity are September and October (63%).
The month with the lowest relative humidity is March (38%).
Average rainfall in September
Portillo, Chile
- Average rainfall in September: 26mm
The wettest month (with the highest rainfall) is June (80mm).
The driest month (with the least rainfall) is March (5mm).
Average rainfall days in September
Portillo, Chile
- Average rainfall days in September: 4.4 days
The month with the highest number of rainy days is January (6.6 days).
The month with the least rainy days is March (2.8 days).
Average snowfall in September
Portillo, Chile
- Average snowfall in September: 207mm
The month with the highest snowfall is June (621mm).
The month with the least snowfall is January (18mm).
Average snowfall days in September
Portillo, Chile
- Average snowfall days in September: 9.5 days
The month with the highest number of snowfall days is June (11.5 days).
The months with the least snowfall days are January, February and March (1.3 days).
Average daylight in September /
Average sunshine in September
Portillo, Chile
- Average daylight in September: 11h and 5min
The month with the longest days is December (Average daylight: 14h and 18min).
The month with the shortest days is June (Average daylight: 10h and 0min).
- Average sunshine in September: 8h and 5min
The month with the most sunshine is February (Average sunshine: 9h and 54min).
The month with the least sunshine is June (Average sunshine: 8h and 6min).
Average sunshine days in September
Portillo, Chile
- Average sunshine days in September: 19.3 days
The month with the most sunshine days is March (26.8 days).
The month with the least sunshine days is June (18 days).
Average UV index in September
Portillo, Chile
- Average UV index in September: 2
The months with the highest UV index are January, February, March and December (UV index 3).
The months with the lowest UV index are April, May, June, July, August, September, October and November (UV index 2).
Average cloud cover in September
Portillo, Chile
- Average cloud cover in September: 22
The months with the most cloud cover are June and July (Cloud cover 27).
The month with the least cloud cover is February (Cloud cover 6).
Average visibility in September
Portillo, Chile
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, November and December (10km).
The months with the lowest visibility are May, June, July, August, September and October (9km).
Portillo, Chile
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