Guatemala City
Guatemala
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Guatemala City, Guatemala

The front view of the iconic buildings of the cathedral in Guatemala City, Guatemala
The front view of the iconic buildings of the cathedral in Guatemala City, Guatemala
The first month of the autumn, September, is also a moderately hot month in Guatemala City, Guatemala, with average temperature fluctuating between 16.4°C (61.5°F) and 25.1°C (77.2°F).

Temperature

In Guatemala City, the average high-temperature in September is practically the same as in August - a still moderately hot 25.1°C (77.2°F). The average low-temperature, in September, is 16.4°C (61.5°F).

Humidity

September is the most humid month, with an average relative humidity of 84.5%.

Rainfall

In Guatemala City, during September, the rain falls for 20.8 days and regularly aggregates up to 236.6mm (9.3") of precipitation. In Guatemala City, during the entire year, the rain falls for 125.2 days and collects up to 1274.8mm (50.2") of precipitation.

Daylight

In Guatemala City, the average length of the day in September is 12.2h.

Sunshine

In September, the average sunshine is 5.3h.

UV index

February through October, with an average maximum UV index of 12, are months with the highest UV index in Guatemala City. A UV Index value of 11, and more, symbolizes an excessive health risk from unsafe exposure to the UV radiation for the ordinary person.
In September, the average maximum UV index of 12 translate into the following recommendations:
Take all required precautions, as unprotected skin and eyes can burn in minutes. 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. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

What is the temperature in September in Guatemala City?

In September, in Guatemala City, Guatemala, the average high-temperature is 25.1°C (77.2°F), and the average low-temperature is 16.4°C (61.5°F).

What is the most humid month in Guatemala City?

The most humid month in Guatemala City, Guatemala, is September, with an average relative humidity of 84.5%.

What is the average humidity in September in Guatemala City?

In Guatemala City, the average relative humidity in September is 84.5%.

How much does it rain in Guatemala City in September?

In September, the rain falls for 20.8 days. Throughout September, 236.6mm (9.3") of precipitation is accumulated.

How many hours of daylight does Guatemala City have in September?

In Guatemala City, the average length of the day in September is 12.2h.

How long on average sun shines in September in Guatemala City?

In Guatemala City, the average sunshine in September is 5.3h.

What is the month with the highest UV index in Guatemala City?

Months with the highest UV index in Guatemala City are February through October, with an average maximum UV index of 12.

What is the UV index reading in September in Guatemala City?

In September, the average daily maximum UV index in Guatemala City is 12. A UV Index reading of 11, and higher, represents an excessive health risk from unprotected exposure to the UV radiation.
Average temperature in September - Guatemala City, Guatemala
  • Average high temperature in September: 25.1°C

The warmest month (with the highest average high temperature) is April (27.8°C).
The month with the lowest average high temperature is December (23.9°C).

  • Average low temperature in September: 16.4°C

Months with the highest average low temperature are May and June (16.8°C).
The coldest month (with the lowest average low temperature) is January (13.2°C).

Average humidity in September - Guatemala City, Guatemala
  • Average humidity in September: 84.5%

The month with the highest relative humidity is September (84.5%).
The month with the lowest relative humidity is March (73.2%).

Average rainfall in September - Guatemala City, Guatemala
  • Average rainfall in September: 236.6mm

The wettest month (with the highest rainfall) is June (271.8mm).
The driest month (with the lowest rainfall) is January (2.8mm).

Average rainfall days in September - Guatemala City, Guatemala
  • Average rainfall days in September: 20.8 days

The month with the highest number of rainy days is June (21.1 days).
The month with the lowest number of rainy days is February (1.5 days).

Average daylight in September / Average sunshine in September - Guatemala City, Guatemala
  • Average daylight in September: 12.2h

The month with the longest days is June (Average daylight: 13h).
The month with shortest days is December (Average daylight: 11.3h).

  • Average sunshine in September: 5.3h

The month with most sunshine is February (Average sunshine: 8.4h).
The month with least sunshine is June (Average sunshine: 5.2h).

Average UV index in September - Guatemala City, Guatemala
  • Average UV index in September: 12

Months with the highest UV index are February, March, April, May, June, July, August, September and October (UV index 12).
The month with the lowest UV index is December (UV index 9).