September weather forecastEl Yunque, Mexico
September
Weather in September
The first month of the autumn, September, is also a hot month in El Yunque, Mexico, with an average temperature ranging between min 21°C (69.8°F) and max 30.7°C (87.3°F).Temperature
The shift from August to September coincides with a small decrease in the average high-temperature, down to a still hot 30.7°C (87.3°F) from 34.2°C (93.6°F). In El Yunque, an average nighttime temperature of 21°C (69.8°F) is expected during September.Heat index
For most parts of September, the heat index is computed to be a tropical 31°C (87.8°F). Continuous activity in exposure could lead to a feeling of fatigue and heat cramps.Take into consideration that the heat index values are calculated for shade and light wind conditions. The direct sun can potentially cause the heat index to increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', quantifies the warmth felt when relative humidity is considered. The influence of weather is personal, with varied individuals experiencing it differently due to differences in body mass, stature, and physical exertion levels. Awareness of direct sun exposure is crucial as it has the potential to heighten the weather's effects, pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Children often do not understand the need to rest and hydrate. Thirst is a late manifestation of dehydration - therefore, it is essential to stay hydrated, particularly during prolonged physical activities.
Humidity
The most humid month in El Yunque is September, with an average relative humidity of 45%.Rainfall
The wettest months are June and September, with an average 29mm (1.14") of rainfall.Snowfall
In El Yunque, snow does not fall in February through November.Daylight
The average length of the day in September is 12h and 20min.On the first day of September in El Yunque, sunrise is at 5:37 am and sunset at 6:21 pm. On the last day of the month, sunrise is at 5:52 am and sunset at 5:45 pm MST.
Sunshine
The average sunshine in September in El Yunque is 9.5h.UV index
In September, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: The daily high UV index of 6 during September translates into the following recommendations:
Stay clear of intense sun exposure. Solar protection is of utmost significance. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
El Yunque, Mexico
- Average high temperature in September: 30.7°C
The warmest month (with the highest average high temperature) is June (35.7°C).
The month with the lowest average high temperature is January (16.6°C).
- Average low temperature in September: 21°C
The month with the highest average low temperature is July (24.8°C).
The coldest month (with the lowest average low temperature) is January (5.5°C).
Average pressure in September
El Yunque, Mexico
- Average pressure in September: 1013.8mbar
The month with the highest atmospheric pressure is January (1019.2mbar).
The month with the lowest atmospheric pressure is June (1010.3mbar).
Average wind speed in September
El Yunque, Mexico
- Average wind speed in September: 11km/h
The windiest month (with the highest average wind speed) is April (13km/h).
The calmest month (with the lowest average wind speed) is December (8.7km/h).
Average humidity in September
El Yunque, Mexico
- Average humidity in September: 45%
The month with the highest relative humidity is September (45%).
The month with the lowest relative humidity is April (23%).
Average rainfall in September
El Yunque, Mexico
- Average rainfall in September: 29mm
The wettest months (with the highest rainfall) are June and September (29mm).
The driest month (with the least rainfall) is February (3mm).
Average rainfall days in September
El Yunque, Mexico
- Average rainfall days in September: 11.8 days
The month with the highest number of rainy days is July (13 days).
The month with the least rainy days is February (2.3 days).
Average snowfall in September
El Yunque, Mexico
- Average snowfall in September: 0mm
The month with the highest snowfall is January (4mm).
The months with the least snowfall are February, March, April, May, June, July, August, September, October and November (0mm).
Average snowfall days in September
El Yunque, Mexico
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and December (0.3 days).
The months with the least snowfall days are March, April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
El Yunque, Mexico
- Average daylight in September: 12h and 18min
The month with the longest days is June (Average daylight: 14h and 0min).
The month with the shortest days is December (Average daylight: 10h and 18min).
- Average sunshine in September: 9h and 30min
The month with the most sunshine is June (Average sunshine: 11h and 48min).
The month with the least sunshine is December (Average sunshine: 8h and 18min).
Average sunshine days in September
El Yunque, Mexico
- Average sunshine days in September: 13.7 days
The months with the most sunshine days are January and December (27.3 days).
The months with the least sunshine days are July and September (13.7 days).
Average UV index in September
El Yunque, Mexico
- Average UV index in September: 6
The months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in September
El Yunque, Mexico
- Average cloud cover in September: 20
The month with the most cloud cover is September (Cloud cover 20).
The months with the least cloud cover are May and June (Cloud cover 10).
Average visibility in September
El Yunque, 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).
