September weather forecast
Guatemala City, Guatemala

Guatemala City's weather in September witnesses a second peak in the rainfall volume with a significant increase compared to August. The meteorological conditions showcase a pattern similar to that seen in the onset of the wet season. While this month experiences the highest relative humidity, no significant transition in temperature is evident from August. September is characterized by highest humidity and second-highest rainfall, making it a typical month during Guatemala's wet season.

Temperature

September's arrival shows an average high-temperature of a still warm 25.1°C (77.2°F), hardly different from the previous month. During September, the nighttime temperature averages to an enjoyable 16.4°C (61.5°F).

Humidity

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

Rainfall

In Guatemala City, Guatemala, during September, the rain falls for 20.8 days and regularly aggregates up to 237mm (9.33") of precipitation. In Guatemala City, during the entire year, the rain falls for 125.2 days and collects up to 1275mm (50.2") of precipitation.

Daylight

In September, the average length of the day in Guatemala City is 12h and 13min.
On the first day of September in Guatemala City, Guatemala, sunrise is at 05:49 and sunset at 18:13. On the last day of the month, sunrise is at 05:51 and sunset at 17:51 CST.

Sunshine

The average sunshine in September in Guatemala City is 5.3h.

UV index

February through October, with an average maximum UV index of 12, are months with the highest UV index. A UV Index value of 11, and more, symbolizes an extreme threat to health from unsafe exposure to UV radiation for average individuals.
Note: A maximum high UV index of 12 in September translates into the following recommendations:
Implement all necessary safeguards, unprotected skin might suffer burns rapidly. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.