September weather forecastValle de Chalco, Mexico
September
Weather in September
September brings about a slight relief to the monsoon conditions predominant in Valle de Chalco, Mexico. The rainfall notably decreases to 174mm (6.85") in September, setting a trend towards a more pleasant climate. The retreat from the rainy season brings with it slightly reduced humidity, providing a departure from the preceding damp environment. The weather is also characterized by receding daylight hours, ushering in shorter days. Wind speeds remain moderately stable, adding to the month's serenity.Temperature
Valle de Chalco starts September with an average high-temperature of a still agreeable 20.5°C (68.9°F), a minor shift from August's 21.7°C (71.1°F). In September, Valle de Chalco's temperature tends to fall to an average low of 11.2°C (52.2°F) during the night.Humidity
The most humid month in Valle de Chalco, Mexico, is September, with an average relative humidity of 80%.Rainfall
In Valle de Chalco, Mexico, in September, during 27.5 rainfall days, 174mm (6.85") of precipitation is typically accumulated. Throughout the year, there are 195.2 rainfall days, and 1088mm (42.83") of precipitation is accumulated.Daylight
The average length of the day in September is 12h and 14min.On the first day of September in Valle de Chalco, sunrise is at 6:20 am and sunset at 6:50 pm. On the last day of the month, sunrise is at 6:26 am and sunset at 6:24 pm CST.
Sunshine
In September, the average sunshine is 9h.UV index
The months with the lowest UV index are January, August through December, with an average maximum UV index of 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: A maximum high daily UV index of 4 during September translates into the following directions:
Ensure safety - Recommendations to avert sunburn are presented. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Valle de Chalco, Mexico
- Average high temperature in September: 20.5°C
The warmest month (with the highest average high temperature) is April (25.3°C).
The month with the lowest average high temperature is January (19.3°C).
- Average low temperature in September: 11.2°C
The month with the highest average low temperature is May (13°C).
The coldest month (with the lowest average low temperature) is January (6.8°C).
Average pressure in September
Valle de Chalco, Mexico
- Average pressure in September: 1015.6mbar
The month with the highest atmospheric pressure is January (1018.4mbar).
The month with the lowest atmospheric pressure is May (1014.2mbar).
Average wind speed in September
Valle de Chalco, Mexico
- Average wind speed in September: 5.5km/h
The windiest months (with the highest average wind speed) are March and April (6.8km/h).
The calmest month (with the lowest average wind speed) is July (4.8km/h).
Average humidity in September
Valle de Chalco, Mexico
- Average humidity in September: 80%
The month with the highest relative humidity is September (80%).
The month with the lowest relative humidity is April (43%).
Average rainfall in September
Valle de Chalco, Mexico
- Average rainfall in September: 174mm
The wettest month (with the highest rainfall) is July (230mm).
The driest month (with the least rainfall) is December (5mm).
Average rainfall days in September
Valle de Chalco, Mexico
- Average rainfall days in September: 27.5 days
The months with the highest number of rainy days are July and August (29.7 days).
The month with the least rainy days is December (4.3 days).
Average daylight in September /
Average sunshine in September
Valle de Chalco, 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 0min
The month with the most sunshine is June (Average sunshine: 10h and 48min).
The month with the least sunshine is November (Average sunshine: 7h and 42min).
Average sunshine days in September
Valle de Chalco, Mexico
- Average sunshine days in September: 1.3 days
The month with the most sunshine days is December (24.9 days).
The months with the least sunshine days are July and August (0.5 days).
Average UV index in September
Valle de Chalco, Mexico
- Average UV index in September: 4
The months with the highest UV index are February, March, April, May, June and July (UV index 5).
The months with the lowest UV index are January, August, September, October, November and December (UV index 4).
Average cloud cover in September
Valle de Chalco, Mexico
- Average cloud cover in September: 37
The months with the most cloud cover are July and September (Cloud cover 37).
The months with the least cloud cover are February and December (Cloud cover 10).
Average visibility in September
Valle de Chalco, Mexico
- Average visibility in September: 8km
The months with the highest visibility are January, February, March, April, May, November and December (10km).
The months with the lowest visibility are July, August and September (8km).
