Climate averages 1991–2020
Retalhuleu weather
in August.
A hot, very wet month: the 8th warmest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a hot month in Retalhuleu: daytime highs average 28.8°C and nights cool to about 22.2°C. By daytime temperature it is the 8th warmest of the 12 months.
Expect about 361 mm of rain on roughly 29 days, which makes August a very wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 36 min on an average August day.
The nearest other city in this atlas is Mazatenango (19 km away). In August its highs average 27.7°C, 1.1°C cooler than Retalhuleu, with 452 mm of rain.
Among the 23 cities listed in Guatemala, Retalhuleu ranks 3rd of 23 for the warmest August highs and 19th of 23 for the driest August (rainfall, lowest first). The mean August high of those 23 cities is 25.2°C; Retalhuleu is 3.6°C warmer than that mean.
From August to September, average highs fall by 0.7°C to 28.1°C, and monthly rainfall rises from 361 mm to 456 mm.
The annual picture
August in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Retalhuleu climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 30.0°C20.3°C | 20.3°C | 18 | 4.9 | 11.411 h |
| February | 31.1°C20.7°C | 20.7°C | 15 | 3.8 | 11.712 h |
| March | 31.6°C21.6°C | 21.6°C | 36 | 8.4 | 12.012 h |
| April | 31.5°C22.4°C | 22.4°C | 93 | 14.4 | 12.512 h |
| May | 29.8°C22.5°C | 22.5°C | 351 | 27.0 | 12.813 h |
| June | 28.5°C22.2°C | 22.2°C | 374 | 28.4 | 13.013 h |
| July | 28.9°C22.2°C | 22.2°C | 287 | 27.0 | 12.913 h |
| August, selected | 28.8°C22.2°C | 22.2°C | 361 | 28.5 | 12.613 h |
| September | 28.1°C21.9°C | 21.9°C | 456 | 29.2 | 12.212 h |
| October | 27.7°C21.7°C | 21.7°C | 384 | 27.7 | 11.812 h |
| November | 28.3°C21.4°C | 21.4°C | 116 | 15.5 | 11.511 h |
| December | 29.2°C20.5°C | 20.5°C | 27 | 6.0 | 11.311 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
August in nearby cities
- Mazatenango in AugustGuatemala · 19 kmHigh 27.7°C · Low 20.9°C · 452 mm rain
- Coatepeque in AugustGuatemala · 27 kmHigh 26.7°C · Low 19.6°C · 555 mm rain
- Quetzaltenango in AugustGuatemala · 38 kmHigh 19.5°C · Low 13.7°C · 363 mm rain
- Totonicapán in AugustGuatemala · 54 kmHigh 19.5°C · Low 12.6°C · 186 mm rain
- Malacatán in AugustGuatemala · 58 kmHigh 27.2°C · Low 18.3°C · 381 mm rain
- Santa Lucía Cotzumalguapa in AugustGuatemala · 74 kmHigh 27.4°C · Low 19.7°C · 294 mm rain
- Tapachula in AugustMexico · 75 kmHigh 28.9°C · Low 20.9°C · 571 mm rain
- Chichicastenango in AugustGuatemala · 76 kmHigh 21.2°C · Low 13.8°C · 189 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Retalhuleu) is explained once on the Retalhuleu year overview and on the Sources, method and limits page.