September weather forecast
Guatemala

September in Guatemala marks the beginning of the transition towards the end of the rainy season. Following the peak wet month of August and preceding the significantly less rainy month of October, September experiences slightly reduced rainfall levels alongside continued warm temperatures.

Across the country, temperatures during September generally range between 19°C (66.2°F) to 29°C (84.2°F), though there are regional variations due to Guatemala's geographical diversity. In Guatemala City, situated in the highlands, the average temperature in September varies from 16°C (60.8°F) to 27°C (80.6°F). Despite the daytime warmth and rainfall, the nights in these highland regions continue to be cooler.

Similarly, in the highland city of Antigua, September temperature patterns show an average range from 14°C (57.2°F) to 26°C (78.8°F). Due to its elevation, the city maintains relatively cool nights, despite the warm and rainy daytime conditions.

On the other hand, the coastal city of Puerto Barrios continues to experience warmer weather, with average temperatures in September fluctuating between 23°C (73.4°F) to 33°C (91.4°F). The lower altitude and close proximity to the sea are factors contributing to this region's consistently warmer climate.

In terms of precipitation, September witnesses a slight decrease in rainfall compared to August, with national averages dropping to 180mm (7.09"). This shift signals the gradual transition from the peak of the rainy season towards its end.

Compared to August, September exhibits similar temperature patterns, with negligible variations. However, the slight reduction in rainfall sets September apart, indicating the start of the shift away from the rainy season. As Guatemala progresses into October, this decrease in rainfall becomes more pronounced, marking a clear move towards the end of the rainy season.

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• Guatemala City - September »
  The most humid month in Guatemala City is September, with an average relative humidity of 84.5%. In Guatemala City during September, the rain falls for 20.8 days and regularly aggregates up to 237mm (9.33") of precipitation.
• Mixco - September »
  The most humid month in Mixco is September, with an average relative humidity of 90%. Mixco's weather, upon September's arrival, documents an average high-temperature of a still moderately hot 23.4°C (74.1°F), nearly identical to the prior month.
• Villa Nueva - September »
  In Villa Nueva in September, it is raining for 28.7 days, with typically 269mm (10.59") of accumulated precipitation. In contrast to the weather in August, September enhances the weather picture of Villa Nueva with a higher accumulation of rainfall, escalating to 269mm (10.59").
• Quetzaltenango - September »
  With an average relative humidity of 87%, September is the most humid month in Quetzaltenango, Guatemala. The most humid month in Quetzaltenango is September, with an average relative humidity of 87%.
• Escuintla - September »
  September is the most humid month in Escuintla with an average relative humidity of 84%. In September, in Escuintla, Guatemala, the rain falls for 29.4 days.
• San Juan Sacatepéquez - September »
  In San Juan Sacatepéquez, during September, the rain falls for 28.7 days and regularly aggregates up to 269mm (10.59") of precipitation. In San Juan Sacatepéquez, during September, the rain falls for 28.7 days and regularly aggregates up to 269mm (10.59") of precipitation.
• Villa Canales - September »
  On the last day of September, in Villa Canales, sunrise is at 05:51 and sunset at 17:52 CST. September's advent in Villa Canales, Guatemala, notes a subtle adjustment in average high-temperature to a still moderately hot 26°C (78.8°F) from August.
• Chinautla - September »
  September sees a sudden jump in rainfall to 211mm (8.31"), making it the rainiest month of the year in Chinautla. September is the month with the most rainfall in Chinautla, with 211mm (8.31") of accumulated precipitation.
• Chimaltenango - September »
  In September, Chimaltenango sees the last of the significant rainfall for the year with precipitation levels climbing further to 269mm (10.59"), the highest for the year. In Chimaltenango, in September, during 28.7 rainfall days, 269mm (10.59") of precipitation is typically accumulated.
• Amatitlán - September »
  With an average relative humidity of 90%, September is the most humid month in Amatitlán, Guatemala. In Amatitlán, in September, it is raining for 28.7 days, with typically 269mm (10.59") of accumulated precipitation.
• Puerto Barrios - September »
  September is the month with the warmest seawater in Puerto Barrios, with an average sea temperature of 29.8°C (85.6°F). March through June, August and September, with an average maximum UV index of 7, are months with the highest UV index in Puerto Barrios, Guatemala.
• Santa Lucía Cotzumalguapa - September »
  September is the most humid month in Santa Lucía Cotzumalguapa, with an average relative humidity of 84%. The most humid month in Santa Lucía Cotzumalguapa is September, with an average relative humidity of 84%.