Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
September
Weather in September
Temperature
September's presence marks an average high-temperature of a still tropical 30°C (86°F), subtly varied from August's 30.9°C (87.6°F). An average low-temperature of 24.5°C (76.1°F) is observed during the September nights.Heat index
For September, the heat index is evaluated at a fiery hot 37°C (98.6°F). Exercise enhanced safety steps, heat cramps and heat exhaustion are probable. Heatstroke could be a result of sustained activity.Heat index determinations are made taking into account the shade and light air movements. Exposure to direct sunlight may make the heat index values climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is a value derived by merging air temperature with the humidity to convey how the climate feels. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Juveniles often do not understand the need to recuperate and rehydrate. Thirst is a delayed symptom of dehydration - hence, it is vital to maintain hydration, particularly during ongoing physical activities.
When faced with excessive heat, the human body begins to perspire, utilizing the cooling benefits of sweat evaporation. With higher relative humidity, the rate of evaporation is reduced, resulting in increased heat retention in the body compared to drier air. Temperature imbalances caused by excessive heat retention can trigger heat-related maladies.
Humidity
The months with the highest humidity are September and October, with an average relative humidity of 77%.Rainfall
The month with the most rainfall is September, when the rain falls for 23.4 days and typically aggregates up to 190mm (7.48") of precipitation.Daylight
The average length of the day in September is 12h and 13min.On the first day of September, sunrise is at 6:20 am and sunset at 6:46 pm. On the last day of the month, sunrise is at 6:23 am and sunset at 6:23 pm CST.
Sunshine
With an average of 8.8h of sunshine, September has the least sunshine of the year.UV index
The months with the highest UV index are January through December, with an average maximum UV index of 7. The months with the lowest UV index are January through December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 7 in September converts into the following recommendations:
Shun overexposure. Protection from sun ravages is indispensable. To the best of your ability, limit your exposure to the sun between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. To cut down UV radiation exposure by about half, sport a wide-brim hat.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot during September?
What is the most humid month?
What is the average humidity in September?
What is the wettest month?
How many days does it rain in September?
How many hours of daylight does Acatepec have in September?
When is the sunrise / sunset in September?
What is the month with the least sunshine?
How long on average sun shines in September?
What is the month with the highest UV index?
What is the month with the lowest UV index?
What is the UV index intensity in September?
Average temperature in September
Acatepec, Mexico
- Average high temperature in September: 30°C
The warmest month (with the highest average high temperature) is May (31.5°C).
The months with the lowest average high temperature are January and December (29.6°C).
- Average low temperature in September: 24.5°C
The month with the highest average low temperature is June (25.3°C).
The coldest months (with the lowest average low temperature) are January and February (22.8°C).
Average pressure in September
Acatepec, Mexico
- Average pressure in September: 1011mbar
The month with the highest atmospheric pressure is January (1013.3mbar).
The month with the lowest atmospheric pressure is May (1010.8mbar).
Average wind speed in September
Acatepec, Mexico
- Average wind speed in September: 9.4km/h
The windiest month (with the highest average wind speed) is June (9.8km/h).
The calmest month (with the lowest average wind speed) is December (7.8km/h).
Average humidity in September
Acatepec, Mexico
- Average humidity in September: 77%
The months with the highest relative humidity are September and October (77%).
The months with the lowest relative humidity are March and April (62%).
Average rainfall in September
Acatepec, Mexico
- Average rainfall in September: 190mm
The wettest month (with the highest rainfall) is September (190mm).
The driest month (with the least rainfall) is April (1mm).
Average rainfall days in September
Acatepec, Mexico
- Average rainfall days in September: 23.4 days
The month with the highest number of rainy days is August (24.5 days).
The month with the least rainy days is February (1.1 days).
Average daylight in September /
Average sunshine in September
Acatepec, Mexico
- Average daylight in September: 12h and 1min
The month with the longest days is June (Average daylight: 13h and 6min).
The month with the shortest days is December (Average daylight: 11h and 12min).
- Average sunshine in September: 8h and 5min
The months with the most sunshine are March and April (Average sunshine: 10h and 0min).
The month with the least sunshine is September (Average sunshine: 8h and 48min).
Average sunshine days in September
Acatepec, Mexico
- Average sunshine days in September: 5.3 days
The month with the most sunshine days is March (29.3 days).
The month with the least sunshine days is August (5 days).
Average UV index in September
Acatepec, Mexico
- Average UV index in September: 7
The months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
Average cloud cover in September
Acatepec, Mexico
- Average cloud cover in September: 36
The month with the most cloud cover is September (Cloud cover 36).
The months with the least cloud cover are March and April (Cloud cover 8).
Average visibility in September
Acatepec, Mexico
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
