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

The commencement of September records an average high-temperature of a still warm 25.1°C (77.2°F), barely varying from August's 25.5°C (77.9°F). During September, Guatemala City witnesses a consistent average low-temperature of 16.4°C (61.5°F).

Humidity

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

Rainfall

In Guatemala City, Guatemala, in September, during 20.8 rainfall days, 237mm (9.33") of precipitation is typically accumulated. Throughout the year, in Guatemala City, there are 125.2 rainfall days, and 1275mm (50.2") of precipitation is accumulated.

Daylight

In Guatemala City, the average length of the day in September is 12h and 13min.
On the first day of September in Guatemala City, 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 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 of 11, and more, symbolizes an excessive health risk from unsafe exposure to UV radiation for ordinary individuals.
Note: In September, a regular UV index of 12 translates into these guidelines:
Put into effect every essential safeguard, as unprotected skin and eyes might burn instantly. 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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.