September weather forecastSantiago, Mexico
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Santiago, Mexico, with an average temperature ranging between max 27.6°C (81.7°F) and min 19.1°C (66.4°F).Temperature
A subtle change in temperatures is noted as August gives way to September, with average highs reducing from a hot 31.7°C (89.1°F) to a warm 27.6°C (81.7°F). Santiago cools down to an average low-temperature of 19.1°C (66.4°F) throughout the month of September.Heat index
In September, the heat index is appraised at a tropical 30°C (86°F). Remaining active during long-lasting exposure could cause fatigue, leading to heat cramps.One should be cognizant that the heat index values are tailored for shaded spots and mild winds. The direct sun can potentially cause the heat index to increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', gives an indication of how one might feel in terms of heat after considering humidity. The experience of temperature can be subjective, varying based on the individual's activity and heat perception, influenced by factors like wind, attire, and metabolic variations. With the sun shining directly, it's crucial to understand that it can increase the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Youngsters are usually more at risk than adults, considering they sweat less. Additionally, their high skin surface area compared to their little bodies and their high heat production due to activity increases their risk.
Humidity
With an average relative humidity of 69%, September is the most humid month in Santiago.Rainfall
In September, in Santiago, the rain falls for 22.8 days. Throughout September, 101mm (3.98") of precipitation is accumulated. In Santiago, during the entire year, the rain falls for 158.3 days and collects up to 602mm (23.7") of precipitation.Snowfall
In Santiago, snow does not fall in January through November.Daylight
In September, the average length of the day is 12h and 17min.On the first day of September, sunrise is at 6:21 am and sunset at 6:59 pm. On the last day of the month, sunrise is at 6:32 am and sunset at 6:27 pm CST.
Sunshine
In September, the average sunshine in Santiago is 8.7h.UV index
In September, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for the ordinary person.Note: The maximum UV index of 6 during September translates into these guidelines:
Uphold preventive measures and conform to sun safety guidelines. Defending against skin and eye harm is crucial. Remember that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. Make an effort to avoid direct sun exposure during these hours. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Santiago, Mexico
- Average high temperature in September: 27.6°C
The warmest month (with the highest average high temperature) is August (31.7°C).
The month with the lowest average high temperature is January (18.5°C).
- Average low temperature in September: 19.1°C
The month with the highest average low temperature is August (20.8°C).
The coldest month (with the lowest average low temperature) is January (8.3°C).
Average pressure in September
Santiago, Mexico
- Average pressure in September: 1014.2mbar
The month with the highest atmospheric pressure is January (1019.5mbar).
The month with the lowest atmospheric pressure is May (1011.6mbar).
Average wind speed in September
Santiago, Mexico
- Average wind speed in September: 9km/h
The windiest months (with the highest average wind speed) are June and July (11.9km/h).
The calmest month (with the lowest average wind speed) is December (7.4km/h).
Average humidity in September
Santiago, Mexico
- Average humidity in September: 69%
The month with the highest relative humidity is September (69%).
The month with the lowest relative humidity is April (50%).
Average rainfall in September
Santiago, Mexico
- Average rainfall in September: 101mm
The wettest month (with the highest rainfall) is May (105mm).
The driest month (with the least rainfall) is February (12mm).
Average rainfall days in September
Santiago, Mexico
- Average rainfall days in September: 22.8 days
The month with the highest number of rainy days is September (22.8 days).
The month with the least rainy days is December (6 days).
Average snowfall in September
Santiago, Mexico
- Average snowfall in September: 0mm
The month with the highest snowfall is December (6mm).
The months with the least snowfall are January, February, March, April, May, June, July, August, September, October and November (0mm).
Average snowfall days in September
Santiago, Mexico
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (0.2 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Santiago, Mexico
- Average daylight in September: 12h and 18min
The month with the longest days is June (Average daylight: 13h and 42min).
The month with the shortest days is December (Average daylight: 10h and 36min).
- Average sunshine in September: 8h and 42min
The month with the most sunshine is June (Average sunshine: 11h and 30min).
The month with the least sunshine is November (Average sunshine: 7h and 0min).
Average sunshine days in September
Santiago, Mexico
- Average sunshine days in September: 5.5 days
The month with the most sunshine days is December (21.5 days).
The month with the least sunshine days is September (5.5 days).
Average UV index in September
Santiago, Mexico
- Average UV index in September: 6
The months with the highest UV index are May and July (UV index 7).
The months with the lowest UV index are January and December (UV index 4).
Average cloud cover in September
Santiago, Mexico
- Average cloud cover in September: 33
The month with the most cloud cover is September (Cloud cover 33).
The month with the least cloud cover is August (Cloud cover 15).
Average visibility in September
Santiago, Mexico
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, October, November and December (10km).
The month with the lowest visibility is September (9km).
