September weather forecastCiudad Vieja, Guatemala
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Ciudad Vieja, Guatemala, with an average temperature varying between 27.3°C (81.1°F) and 19°C (66.2°F).Temperature
Ciudad Vieja experiences an average high-temperature of a still moderately hot 27.3°C (81.1°F) with the onset of September, subtly varied from August's 28.3°C (82.9°F). Ciudad Vieja's average low-temperature during September nights is observed to be a refreshing 19°C (66.2°F).Heat index
For September, the heat index is computed to be a hot 31°C (87.8°F). Persistent activity under exposure might lead to a feeling of weariness, with subsequent heat cramps.Always consider that heat index estimations are for light winds and places in the shade. If exposed to direct sunlight, the heat index could climb by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is a metric representing the sensation of warmth when air temperature and moisture come together. A person's impression of weather can be swayed by numerous aspects, among them metabolic variations, pregnancy, and activity levels. When you're directly under the sun's rays, remember that the heat index may surge by 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Younglings are generally more in peril than adults due to their reduced perspiration. Coupled with a larger skin surface relative to their tiny bodies and greater heat production because of their activity, they become more at risk.
Humidity
The most humid month is September, with an average relative humidity of 84%.Rainfall
In Ciudad Vieja, Guatemala, in September, during 29.4 rainfall days, 230mm (9.06") of precipitation is typically accumulated. In Ciudad Vieja, 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 in Ciudad Vieja is 12h and 13min.On the first day of the month, sunrise is at 05:51 and sunset at 18:14. On the last day of September, in Ciudad Vieja, sunrise is at 05:52 and sunset at 17:52 CST.
Sunshine
In Ciudad Vieja, 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 in Ciudad Vieja. The months with the lowest UV index are January through December, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: In September, a regular UV index of 6 translates into these guidelines:
Prevent overexposure. Protection from the sun's harmful effects is needed. Be aware that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. and try to reduce direct sun exposure during this period as much as possible. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Ciudad Vieja, 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
Ciudad Vieja, 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
Ciudad Vieja, 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
Ciudad Vieja, 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
Ciudad Vieja, 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
Ciudad Vieja, 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
Ciudad Vieja, Guatemala
- Average daylight in September: 12h and 12min
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 42min
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
Ciudad Vieja, 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
Ciudad Vieja, 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
Ciudad Vieja, 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
Ciudad Vieja, 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).
