Guatemala City weather in August
In August, Guatemala City has daytime highs averaging 25 °C, nights around 16 °C, with 15 wet days. Figures are 1991–2020 climate normals.
- 24.7°C Average high
- 15.5°C Average low
- 15days Wet days
- 87mm Rainfall
- 13h Daylight
Daily temperatures through August
How August develops
Averages for the first, middle and last part of the month, from daily 1991–2020 normals. Chance of rain is the share of years in which that calendar day recorded more than 1 mm.
| Days | Avg high | Avg low | Chance of rain |
|---|---|---|---|
| 1–10 August | 24.9 °C | 15.5 °C | 40 % |
| 11–20 August | 24.5 °C | 15.5 °C | 48 % |
| 21–31 August | 24.6 °C | 15.5 °C | 52 % |
- Rain is most likely over days 21–31 of August (52 % of days) and least likely over days 1–10 (40 %).
What to expect
| Measure | Typical August | Share of the month |
|---|---|---|
| Days above 25 °C | 12 of 31 | 40 % |
| Days above 30 °C | 0 of 31 | 0 % |
| Days below 0 °C | 0 of 31 | 0 % |
| Days with more than 1 mm rain | 15 of 31 | 47 % |
Conditions in August
| Measure | Average |
|---|---|
| Mean temperature | 19 °C |
| Record high (1991–2020) | 29 °C |
| Record low (1991–2020) | 13 °C |
| Relative humidity | 80 % |
| Wind speed | 12 km/h |
| Cloud cover | 76 % |
Where Guatemala City ranks in August
| Ranking | Position | Value |
|---|---|---|
| The coolest places in North America in August | 39thof 50 | 25 °C |
August compared with the months around it
| Month | Avg high | Rainfall | Cloud |
|---|---|---|---|
| June | 24.1 °C | 146 mm | 84 % |
| July | 24.3 °C | 76 mm | 76 % |
| August | 24.7 °C | 87 mm | 76 % |
| September | 23.9 °C | 138 mm | 82 % |
| October | 23.2 °C | 110 mm | 75 % |
See all twelve months for Guatemala City
- August is the 5th warmest month here.
- It is the 9th driest month of the year.
- It ranks 10th for least cloud cover.
- Days last about 13 hours from sunrise to sunset.
- It rains on 15 of 31 days — 47 % of the month.
- Nights are about 9.2 °C cooler than the middle of the day.
- The hottest August day on record since 1991 reached 29 °C, 3.8 °C above the usual daytime high.
Nearby destinations in August
| Destination | Avg high | Wet days |
|---|---|---|
| Guatemala City | 25 °C | 15 |
| Mixco | 24 °C | 14 |
| Villa Nueva | 25 °C | 22 |
| Villa Canales | 26 °C | 22 |
| Escuintla | 28 °C | 30 |
| Jalapa | 25 °C | 21 |
| Cobán | 24 °C | 29 |
QuestionsAugust in Guatemala City, answered
How warm is Guatemala City in August?
Daily highs average 25 °C and nights fall to about 16 °C, a spread of 9.2 °C between afternoon and dawn. That makes August the 4th warmest month of the year here.
Does it rain much in Guatemala City in August?
August averages 87 mm of rain, spread over about 15 of the 31 days — 47 % of the month. Cloud cover averages 76 % of the sky.
How long are the days in August?
Guatemala City averages 13 hours between sunrise and sunset in August. Day length is computed from latitude and date, so it is exact rather than modelled — but it says nothing about how much of that time is sunny.
Data sources and method
- ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
- Open-Meteo — Open-Meteo.com. CC BY 4.0
- NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
- GeoNames — GeoNames.org. CC BY 4.0
- Normal period
- 1991–2020
- Dataset version
- era5-1991-2020-scores1.1
- Last processed
Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: daylight hours, beach and comfort scores, monthly rankings, threshold day counts, chance of a wet day by date, ten-day averages within the month. Full formulas are on the methodology page.
Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.