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
The transition into September marks the average high-temperature at a still hot 30.7°C (87.3°F), differing minimally from August's 31.4°C (88.5°F). Throughout September, the average low-temperature records at a moderately hot 25.3°C (77.5°F).Heat index
For most parts of September, the heat index is calculated to be a torrid 39°C (102.2°F). More safety actions are required, heat exhaustion and heat cramps are probable. Long-term activity may precipitate heatstroke.When assessing, remember that heat index measurements are for light winds and shaded spots. The presence of direct sunlight can raise the heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is a numerical representation of warmth when taking temperature and moisture levels into account. Elements such as metabolic variations, pregnancy, and physical exertion can shape one's weather perception. With direct sunlight, be aware that it might enhance the heat sensation, raising the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Young people are generally more susceptible than adults because they perspire less. Furthermore, their proportionally larger skin surface to their petite bodies and the increased heat output from their actions add to the risk.
In high temperatures, perspiration kicks in, allowing the human body to cool down through the evaporation of sweat. An increase in relative humidity retards evaporation, subsequently reducing the body's heat removal rate and leading to a sensation of being overly warm. When heat uptake goes beyond the body's cooling mechanisms, there's a surge in body temperature, posing health risks.
Humidity
The most humid month is September, with an average relative humidity of 78%.Rainfall
In Chunchucmil, during September, the rain falls for 22.7 days and regularly aggregates up to 91mm (3.58") of precipitation. Throughout the year, there are 154.1 rainfall days, and 532mm (20.94") of precipitation is accumulated.Daylight
In September, the average length of the day in Chunchucmil is 12h and 15min.On the first day of September, sunrise is at 5:44 am and sunset at 6:16 pm. On the last day of the month, sunrise is at 5:51 am and sunset at 5:49 pm CST.
Sunshine
In September, the average sunshine is 10.6h.UV index
March through October, with an average maximum UV index of 7, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for average individuals.Note: The UV index of 7 in September translates into these instructions:
Continue precautions and advocate sun safety advice. Deterrence of sunburn is indispensable. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is September?
What is the most humid month?
What is the average humidity in September?
How many days does it rain in September?
How many hours of daylight does Chunchucmil have in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Chunchucmil have in September?
What are the months with the highest UV index?
What is the UV index intensity in September?
Average temperature in September
Chunchucmil, Mexico
- Average high temperature in September: 30.7°C
The warmest month (with the highest average high temperature) is August (31.4°C).
The month with the lowest average high temperature is January (25.8°C).
- Average low temperature in September: 25.3°C
The month with the highest average low temperature is June (25.7°C).
The coldest month (with the lowest average low temperature) is January (20.7°C).
Average pressure in September
Chunchucmil, Mexico
- Average pressure in September: 1011.8mbar
The month with the highest atmospheric pressure is January (1017.5mbar).
The month with the lowest atmospheric pressure is September (1011.8mbar).
Average wind speed in September
Chunchucmil, Mexico
- Average wind speed in September: 15.9km/h
The windiest month (with the highest average wind speed) is March (20.9km/h).
The calmest month (with the lowest average wind speed) is September (15.9km/h).
Average humidity in September
Chunchucmil, Mexico
- Average humidity in September: 78%
The month with the highest relative humidity is September (78%).
The months with the lowest relative humidity are March and April (71%).
Average rainfall in September
Chunchucmil, Mexico
- Average rainfall in September: 91mm
The wettest month (with the highest rainfall) is June (103mm).
The driest month (with the least rainfall) is February (8mm).
Average rainfall days in September
Chunchucmil, Mexico
- Average rainfall days in September: 22.7 days
The month with the highest number of rainy days is September (22.7 days).
The month with the least rainy days is February (4.8 days).
Average daylight in September /
Average sunshine in September
Chunchucmil, Mexico
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 13h and 24min).
The month with the shortest days is December (Average daylight: 10h and 54min).
- Average sunshine in September: 10h and 4min
The month with the most sunshine is July (Average sunshine: 11h and 42min).
The month with the least sunshine is January (Average sunshine: 6h and 30min).
Average sunshine days in September
Chunchucmil, Mexico
- Average sunshine days in September: 4.7 days
The month with the most sunshine days is March (24.8 days).
The month with the least sunshine days is September (4.7 days).
Average UV index in September
Chunchucmil, Mexico
- Average UV index in September: 7
The months with the highest UV index are March, April, May, June, July, August, September and October (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 6).
Average cloud cover in September
Chunchucmil, Mexico
- Average cloud cover in September: 26
The month with the most cloud cover is January (Cloud cover 30).
The months with the least cloud cover are April and July (Cloud cover 19).
Average visibility in September
Chunchucmil, 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).
