September weather forecastCopalillo, Mexico
September
Weather in September
September, the first month of the autumn in Copalillo, is still a warm month, with an average temperature ranging between min 16°C (60.8°F) and max 28.2°C (82.8°F).Temperature
The arrival of September brings an average high-temperature of a still warm 28.2°C (82.8°F), nearly identical to August's 29.6°C (85.3°F). Copalillo, amid September nights, sees a noteworthy disparity from daily highs with an average temperature of 16°C (60.8°F).Heat index
In September, the heat index is evaluated at a tropical 32°C (89.6°F). If exposure and activity persist, fatigue could ensue, possibly leading to heat cramps.Metrics for the heat index primarily focus on shaded spots and light wind conditions. Direct sunshine exposure could raise heat index values by as much as 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', ties air temperature with relative humidity to produce the perceived temperature sensation. Physical activity, clothing, and metabolic variations are additional factors that impact an individual's perception of temperature. Do note, being directly under sun rays can amplify the heat you feel, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.
Humidity
The most humid month is September, with an average relative humidity of 78%.Rainfall
The month with the most rainfall in Copalillo is September, when the rain falls for 27 days and typically aggregates up to 158mm (6.22") of precipitation.Snowfall
The only month with snowfall in Copalillo, Mexico, is September. September is the month with the most snowfall in Copalillo, Mexico. Snow falls for 0.1 days and accumulates 1mm (0.04") of snow.Daylight
In September, the average length of the day is 12h and 14min.On the first day of the month, sunrise is at 6:21 am and sunset at 6:49 pm. On the last day of September, in Copalillo, sunrise is at 6:26 am and sunset at 6:25 pm CST.
Sunshine
In September, the average sunshine is 9.2h.UV index
In Copalillo, Mexico, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for the average person.Note: A daily high UV index of 6 in September leads to these guidelines:
Adhere to precautions and respect sun safety doctrines. Avoiding sunburn is vital. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Copalillo, Mexico
- Average high temperature in September: 28.2°C
The warmest month (with the highest average high temperature) is April (34.3°C).
The months with the lowest average high temperature are January and December (27.5°C).
- Average low temperature in September: 16°C
The month with the highest average low temperature is May (20.4°C).
The coldest month (with the lowest average low temperature) is January (13.3°C).
Average pressure in September
Copalillo, Mexico
- Average pressure in September: 1014.1mbar
The month with the highest atmospheric pressure is January (1016.1mbar).
The month with the lowest atmospheric pressure is May (1013mbar).
Average wind speed in September
Copalillo, Mexico
- Average wind speed in September: 4km/h
The windiest month (with the highest average wind speed) is April (5.2km/h).
The calmest months (with the lowest average wind speed) are August and September (4km/h).
Average humidity in September
Copalillo, Mexico
- Average humidity in September: 78%
The month with the highest relative humidity is September (78%).
The month with the lowest relative humidity is April (35%).
Average rainfall in September
Copalillo, Mexico
- Average rainfall in September: 158mm
The wettest month (with the highest rainfall) is September (158mm).
The driest months (with the least rainfall) are January and December (4mm).
Average rainfall days in September
Copalillo, Mexico
- Average rainfall days in September: 27 days
The month with the highest number of rainy days is August (28.2 days).
The month with the least rainy days is December (3.1 days).
Average snowfall in September
Copalillo, Mexico
- Average snowfall in September: 1mm
The month with the highest snowfall is September (1mm).
The months with the least snowfall are January, February, March, April, May, June, July, August, October, November and December (0mm).
Average snowfall days in September
Copalillo, Mexico
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is September (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, October, November and December (0 days).
Average daylight in September /
Average sunshine in September
Copalillo, Mexico
- Average daylight in September: 12h and 12min
The month with the longest days is June (Average daylight: 13h and 12min).
The month with the shortest days is December (Average daylight: 11h and 6min).
- Average sunshine in September: 9h and 12min
The months with the most sunshine are January, February, April and December (Average sunshine: 9h and 54min).
The month with the least sunshine is November (Average sunshine: 8h and 36min).
Average sunshine days in September
Copalillo, Mexico
- Average sunshine days in September: 1.6 days
The month with the most sunshine days is December (26.7 days).
The month with the least sunshine days is August (1.4 days).
Average UV index in September
Copalillo, Mexico
- Average UV index in September: 6
The months with the highest UV index are March, April and May (UV index 7).
The months with the lowest UV index are January, October, November and December (UV index 5).
Average cloud cover in September
Copalillo, Mexico
- Average cloud cover in September: 34
The month with the most cloud cover is September (Cloud cover 34).
The months with the least cloud cover are April and December (Cloud cover 9).
Average visibility in September
Copalillo, Mexico
- Average visibility in September: 8km
The months with the highest visibility are January, February, March, April, May, June, November and December (10km).
The month with the lowest visibility is September (8km).
