Guatemala City Weather in September
What's the weather like in Guatemala City (Guatemala) in September 2025?
The climate in Guatemala City during September can be summarized as warm and very wet.
September is in the fall / autumn in Guatemala City and is typically the 6th coldest month of the year. Daytime maximum temperatures average around 23°C (73°F), whilst at night 14°C (57°F) is normal.
| Daytime temperature | 23°C 73.4°F |
|---|---|
| Nightly temperature | 13.8°C 56.8°F |
| Average temperature | 18.4°C 65.1°F |
| Daily sunshine | 5.7 hrs |
| Avg rainfall | 227 mm 8.9 ins |
| Rainy days | 26 days |
| Sea temperature | 29.5°C 85.1°F |
| Humidity | 85% |
| Windspeed | 7.9kph 5 mph |
On average September is the 2nd wettest month of the year in Guatemala City with around 227mm 8.9 inches of rain making it a very wet time to visit. This rainfall is typically spread over 26 days, although this may vary considerably.
On the flip side this corresponds to an average of 5.7 hours of sunshine per day.
September temperatures in Guatemala City
September rainfall
September hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Guatemala City in September 2025.
Other monthly averages
Best places to visit in September
Guatemala City weather stats
| Hottest month: | May | 25°C 77°F |
|---|---|---|
| Driest month: | February | 4mm 0.2ins |
| Sunniest month: | January | 8.5hrs |
| Coldest month: | January | 22.1°C 71.8°F |
| Wettest month: | June | 236mm 9.3ins |
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