Weather in Guatemala City in September 2025
Average weather
Average temperature in Guatemala City in September
Going from a maximum of +30°C during the day to a minimum of +15°C during the night, the temperature in September averages around +28°C.
The average maximum temperature goes down 20% by the end of the month, compared with the beginning of the month, from +29°C to +26°C.
Is Guatemala City warm or cold in September?
Guatemala City is typically warm in September.
Maximum temperatures go down compared to the previous month from +26°C to +25°C. The minimum temperature also goes up from +15°C to +15°C.
It’s generally warm, but pack a long-sleeve shirt for evenings.
Take a look at how September is compared to other months in Guatemala City:
Climate in Guatemala City in September
| August | September | October | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +26°C | +25°C | +24°C | ||||
| Min. temperature | ||||||
| +12°C | +12°C | +9°C | ||||
| Max. temperature | ||||||
| +30°C | +30°C | +29°C | ||||
| Rainfall | ||||||
| 69 mm | 123 mm | 81 mm | ||||
| Wind | ||||||
| 3 m/s | 2 m/s | 3 m/s | ||||
| Humidity | ||||||
| 72% | 76% | 76% | ||||
| Air pressure | ||||||
| 1014 HPa | 1013 HPa | 1013 HPa | ||||
| Sunny days | ||||||
| 0 | 0 | 1 | ||||
| Cloudy days | ||||||
| 6 | 3 | 10 | ||||
| Rainy days | ||||||
| 18 | 21 | 17 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
September typically has worse weather conditions compared to August. It’s getting colder in September. From +26°C in the day, the average maximum temperature lowers to +25°C. Prepare for more rain. Average rainfall goes from 69 mm to 123 mm. Humidity rises from 72% to 76%. Winds are calmer in comparison to August, going down from 3 m/s to 2 m/s on average. The amount of sunny days stay about the same, averaging 0 sunny days during the month.
October brings much the same weather, it remains ok.
Wind
The average wind speed is 4 m/s getting up to 5 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Guatemala City is gradually decreasing during September, going from 4 m/s to 3 m/s over the course of the month.
Rain
How was the weather last September in Guatemala City?
Climate Change over Years
The climate in Guatemala City in September has not changed much over the last 43 years.
The average temperature was the lowest in 1979 (+24°C) and the highest in 2019 (+27°C). The driest year was 1986 with only 265 mm of rainfall, and the wettest year was 2022 with 1213 mm.
FAQ
Is September a good time to visit Guatemala City?
Can you sunbathe in Guatemala City in September?
Is Guatemala City rainy in September?
Is it sunny in Guatemala City in September?
Monthly weather in Guatemala City
Source of the data
For this page, we’ve looked at the typical weather in Guatemala City, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.