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The climate in Chile is typically temperate; desert in north; Mediterranean in central region; cool and damp in south. The terrain: low coastal mountains; fertile central valley; rugged Andes in east. For Santiago in January the daily average maximum temperatures is 31°C with the average minimum 12°C, while in June the average maximum is 17°C with a minimum of 3°C. The wettest month for Santiago is June with an average of 67.1mm of precipitation falling while the driest month is January with 1.9mm falling.
The information presented below gives detailed historical monthly average weather conditions along with exceptional weather occurrences. To maintain relevance to current weather trends the displayed information has been calculated using data collected over the past two decades. The climate profile is taken from closest available data source to Juan Fernandez.
Throughout the month of September daytime temperatures will generally reach highs of around 14°C that's about 58°F. At night the average minimum temperature drops down to around 10°C, that's 49°F.
In recent times the highest recorded temperature in September has been 27°C that's 80°F, with the lowest recorded temperature 2°C, about 35°F.
The average daily relative humidity for September is around 76%.
The Heat Index is a measure of how hot it feels when relative humidity is added to actual air temperature. From this a comfort level is calculated providing categories on how heat conditions might adversely affect someone.
Comfort Levels: Given average maximum temperatures and humidity levels generally you should not anticipate any discomfort from heat (see heat index for more information).
The average monthly amount of precipitation has been recorded at around 81 mm, that's 3 inches. Throughout the month you can expect to see rain or drizzle falling on 10 days of the month.
The average daily wind speed in September has been around 12 km/h, that’s the equivalent to about 8 mph, or 7 knots. In recent years the maximum sustained wind speed has reached 65 km/h, that’s the equivalent of around 40 mph, or 35 knots.
On average the month of September is not affected by foggy conditions.
The following charts show yearly weather trends with information on monthly weather averages and extremes.
The chart below plots the average high and low temperature for each month of the year. It also shows the maximum and minimum recorded temperatures.
The chart below plots the average monthly precipitation amount.
The chart below plots the average number of days in any month that you can expect to see rain falling.
The chart below plots the average daily wind speed you can expect for any month. It also shows the maximum recorded sustained wind speed for each month.