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 onset of September marks an average high-temperature of a still warm 27.3°C (81.1°F), hardly differing from August's 28.3°C (82.9°F). Acatenango experiences an average temperature drop to a comfortable 19°C (66.2°F) during September nights.Heat index
Throughout September, the heat index is appraised at a tropical 31°C (87.8°F). With ongoing exposure and activity, one might experience weariness, and heat cramps could ensue.Keep in mind the heat index values are meant for areas in shade and with light wind. If directly exposed to the sun, the heat index could rise by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. This effect tends to be personal, with the weather perception differing among individuals due to variations in body mass, height, and exertion. Be mindful that being in direct sunlight might mean feeling hotter, with the heat index rising by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Typically, young kids are at a higher risk than adults since they sweat less. Also, the larger skin surface in proportion to their small bodies and the heightened heat production due to their active nature adds to their vulnerability.
Humidity
With an average relative humidity of 84%, September is the most humid month.Rainfall
In Acatenango, during September, the rain falls for 29.4 days and regularly aggregates up to 230mm (9.06") of precipitation. In Acatenango, Guatemala, during the entire year, the rain falls for 228.7 days and collects up to 1368mm (53.86") of precipitation.Daylight
In September, the average length of the day is 12h and 13min.On the first day of the month, sunrise is at 05:51 and sunset at 18:15. On the last day of September, sunrise is at 05:53 and sunset at 17:53 CST.
Sunshine
In Acatenango, the average sunshine in September is 9.7h.UV index
January through December, with an average maximum UV index of 6, are months with the highest UV index. The months with the lowest UV index in Acatenango are January through December, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for average individuals.Note: An average maximum UV index of 6 in September leads to these recommendations:
Sustain precautions and conform to sun safety norms. Preventing sunburn is necessary. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures may not provide full sun protection. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature?
What is the most humid month?
What is the average humidity in September?
How much does it rain in September?
How many hours of daylight does Acatenango have in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Acatenango have 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
Acatenango, Guatemala
- Average high temperature in September: 27.3°C
The warmest month (with the highest average high temperature) is March (30.6°C).
The month with the lowest average high temperature is October (27.1°C).
- Average low temperature in September: 19°C
The month with the highest average low temperature is May (20.7°C).
The coldest month (with the lowest average low temperature) is January (17.2°C).
Average pressure in September
Acatenango, Guatemala
- Average pressure in September: 1012.3mbar
The month with the highest atmospheric pressure is January (1014.6mbar).
The months with the lowest atmospheric pressure are May and October (1012.2mbar).
Average wind speed in September
Acatenango, Guatemala
- Average wind speed in September: 5.6km/h
The windiest month (with the highest average wind speed) is January (9.3km/h).
The calmest month (with the lowest average wind speed) is September (5.6km/h).
Average humidity in September
Acatenango, Guatemala
- Average humidity in September: 84%
The month with the highest relative humidity is September (84%).
The month with the lowest relative humidity is March (61%).
Average rainfall in September
Acatenango, Guatemala
- Average rainfall in September: 230mm
The wettest month (with the highest rainfall) is June (240mm).
The driest month (with the least rainfall) is January (4mm).
Average rainfall days in September
Acatenango, Guatemala
- Average rainfall days in September: 29.4 days
The month with the highest number of rainy days is September (29.4 days).
The month with the least rainy days is January (4.3 days).
Average daylight in September /
Average sunshine in September
Acatenango, Guatemala
- Average daylight in September: 12h and 1min
The month with the longest days is June (Average daylight: 13h and 0min).
The month with the shortest days is December (Average daylight: 11h and 18min).
- Average sunshine in September: 9h and 4min
The month with the most sunshine is April (Average sunshine: 11h and 36min).
The month with the least sunshine is December (Average sunshine: 7h and 36min).
Average sunshine days in September
Acatenango, Guatemala
- Average sunshine days in September: 0.3 days
The month with the most sunshine days is January (23.9 days).
The month with the least sunshine days is September (0.3 days).
Average UV index in September
Acatenango, Guatemala
- Average UV index in September: 6
The months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 6).
The months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 6).
Average cloud cover in September
Acatenango, Guatemala
- Average cloud cover in September: 42
The month with the most cloud cover is September (Cloud cover 42).
The months with the least cloud cover are January and December (Cloud cover 11).
Average visibility in September
Acatenango, Guatemala
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, November and December (10km).
The months with the lowest visibility are May, June, July, August, September and October (9km).
