Guatemala City weather in September
September in Guatemala City: warm, rainy, with clean air — an excellent time to visit.
#11 of 12 months in Guatemala City · #219 of 604 destinations to visit in September · comfort 84/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Guatemala City climate normals — September
| Daytime high | 25°C / 77°F | 🌤 warm |
|---|---|---|
| Nighttime low | 16°C / 60°F | |
| Feels like (high) | 27°C / 81°F | |
| Rainfall | 100 mm / 3.9 in | 🌧 rainy |
| Rainy days | 16 days | |
| Humidity | 84% | 💦 very humid |
| Dew point | 16°C / 62°F | |
| Sunshine | 9.7 h/day | |
| Daylight | 12.2 h | |
| Wind | 10 km/h / 6 mph | |
| Air quality (US AQI) | 47 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Guatemala City in September — FAQ
- Is September a good time to visit Guatemala City?
- September in Guatemala City: warm, rainy, with clean air — an excellent time to visit. It ranks #11 of 12 months for Guatemala City on SeasonMap's comfort score (84/100).
- What is the weather like in Guatemala City in September?
- In September, Guatemala City averages a daily high of 24.8°C and a low of 15.8°C, with about 99.8 mm of rain over roughly 16.4 rainy days.
- What is the air quality in Guatemala City in September?
- Guatemala City has a mean US Air Quality Index of about 47 in September.