Country Overview For Chile
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.
HISTORICAL MONTHLY AVERAGES FOR SEPTEMBER
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 Rancagua.
Throughout the month of September daytime temperatures will generally reach highs of around 18°C that's about 65°F. At night the average minimum temperature drops down to around 5°C, that's 41°F.
In recent times the highest recorded temperature in September has been 32°C that's 90°F, with the lowest recorded temperature -2°C, about 28°F.
The average daily relative humidity for September is around 73%.
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 15 mm, that's 1 inches. Throughout the month you can expect to see rain or drizzle falling on 6 days of the month.
Estimated Hours of Sunshine per Day
We calculate sunshine hours per day using our past forecast data. For September expect the sun to shine for an average of 10 hours per day. This represents the average number of hours in the daytime that the sun is visible and not obscured by cloud e.g. the average number of hours the sun is actually out and shining. Note we calculate hours of sunshine per day using our past forecast data, not observation data, thus it is an estimate and not actual.
The average daily wind speed in September has been around 8 km/h, that’s the equivalent to about 5 mph, or 4 knots. In recent years the maximum sustained wind speed has reached 59 km/h, that’s the equivalent of around 37 mph, or 32 knots.
On average the month of September is affected by foggy conditions on 8 days.
SWIMMING AND WATER TEMPERATURE
The temperature of water an individual will feel comfortable in is very much personal preference. What feels unbearably cold to one person for a swim might be fine for another. We have created our own Swimming Water Temperature Index offering a guide to water temperature and comfort levels for swimming;
In September, for the nearest coastal location, the temperature of the sea averages around 13°C, that's 55° Fahrenheit. Our index indicates for swimming this is considered cold and even the most hardy among us would find any more than a few minutes in the water uncomfortable.
YEARLY TRENDS: WEATHER AVERAGES & EXTREMES
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.