September weather forecastChiautla, Mexico
September
Weather in September
The first month of the autumn, September, is also an agreeable month in Chiautla, Mexico, with an average temperature fluctuating between 20.7°C (69.3°F) and 10.6°C (51.1°F).Temperature
Chiautla experiences a recorded average high-temperature of a still pleasant 20.7°C (69.3°F) in September, closely aligned with August's 21.7°C (71.1°F). Nighttime temperature experiences an average drop to a fresh 10.6°C (51.1°F) in September.Humidity
September is the most humid month, with an average relative humidity of 77%.Rainfall
In Chiautla, in September, it is raining for 23.5 days, with typically 94mm (3.7") of accumulated precipitation. Throughout the year, there are 163.6 rainfall days, and 643mm (25.31") of precipitation is accumulated.Daylight
The average length of the day in September is 12h and 14min.On the first day of the month, sunrise is at 6:20 am and sunset at 6:50 pm. On the last day of September, in Chiautla, sunrise is at 6:26 am and sunset at 6:24 pm CST.
Sunshine
The average sunshine in September in Chiautla is 9.1h.UV index
The months with the lowest UV index are January, June through December, with an average maximum UV index of 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: The UV index of 4 during September translates into the following guidance:
Put precautions into practice - Guidance to elude sunburn is provided. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Chiautla, Mexico
- Average high temperature in September: 20.7°C
The warmest month (with the highest average high temperature) is May (25.3°C).
The month with the lowest average high temperature is January (18.9°C).
- Average low temperature in September: 10.6°C
The month with the highest average low temperature is May (12.8°C).
The coldest month (with the lowest average low temperature) is January (6.5°C).
Average pressure in September
Chiautla, Mexico
- Average pressure in September: 1015.7mbar
The month with the highest atmospheric pressure is January (1018.6mbar).
The month with the lowest atmospheric pressure is May (1014.2mbar).
Average wind speed in September
Chiautla, Mexico
- Average wind speed in September: 6.8km/h
The windiest months (with the highest average wind speed) are February, March and April (8km/h).
The calmest month (with the lowest average wind speed) is July (6.1km/h).
Average humidity in September
Chiautla, Mexico
- Average humidity in September: 77%
The month with the highest relative humidity is September (77%).
The month with the lowest relative humidity is April (42%).
Average rainfall in September
Chiautla, Mexico
- Average rainfall in September: 94mm
The wettest month (with the highest rainfall) is August (125mm).
The driest month (with the least rainfall) is December (4mm).
Average rainfall days in September
Chiautla, Mexico
- Average rainfall days in September: 23.5 days
The month with the highest number of rainy days is August (24.4 days).
The month with the least rainy days is December (3.7 days).
Average daylight in September /
Average sunshine in September
Chiautla, Mexico
- Average daylight in September: 12h and 12min
The month with the longest days is June (Average daylight: 13h and 18min).
The month with the shortest days is December (Average daylight: 11h and 0min).
- Average sunshine in September: 9h and 6min
The month with the most sunshine is June (Average sunshine: 10h and 54min).
The month with the least sunshine is November (Average sunshine: 7h and 42min).
Average sunshine days in September
Chiautla, Mexico
- Average sunshine days in September: 3.2 days
The month with the most sunshine days is December (26.1 days).
The month with the least sunshine days is September (3.2 days).
Average UV index in September
Chiautla, Mexico
- Average UV index in September: 4
The months with the highest UV index are February, March, April and May (UV index 5).
The months with the lowest UV index are January, June, July, August, September, October, November and December (UV index 4).
Average cloud cover in September
Chiautla, Mexico
- Average cloud cover in September: 37
The month with the most cloud cover is July (Cloud cover 38).
The months with the least cloud cover are February and December (Cloud cover 11).
Average visibility in September
Chiautla, Mexico
- Average visibility in September: 8km
The months with the highest visibility are January, February, March, April, May and December (10km).
The months with the lowest visibility are July, August and September (8km).
