Climate averages 1991–2020
Retalhuleu weather
in December.
A hot, fairly dry month: the 6th warmest and the 3rd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a hot month in Retalhuleu: daytime highs average 29.2°C and nights cool to about 20.5°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 27 mm of rain on roughly 6 days, which makes December a fairly dry month (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 17 min on an average December day.
The nearest other city in this atlas is Mazatenango (19 km away). In December its highs average 28.2°C, 0.9°C cooler than Retalhuleu, with 41 mm of rain.
Among the 23 cities listed in Guatemala, Retalhuleu ranks 1st of 23 for the warmest December highs and joint 15th of 23 for the driest December (rainfall, lowest first). The mean December high of those 23 cities is 24.1°C; Retalhuleu is 5.0°C warmer than that mean.
From December to January, average highs rise by 0.8°C to 30.0°C, and monthly rainfall falls from 27 mm to 18 mm.
The annual picture
December 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 | 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, selected | 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
December in nearby cities
- Mazatenango in DecemberGuatemala · 19 kmHigh 28.2°C · Low 19.5°C · 41 mm rain
- Coatepeque in DecemberGuatemala · 27 kmHigh 27.0°C · Low 17.7°C · 71 mm rain
- Quetzaltenango in DecemberGuatemala · 38 kmHigh 18.9°C · Low 12.0°C · 42 mm rain
- Totonicapán in DecemberGuatemala · 54 kmHigh 18.7°C · Low 10.8°C · 17 mm rain
- Malacatán in DecemberGuatemala · 58 kmHigh 27.4°C · Low 17.0°C · 42 mm rain
- Santa Lucía Cotzumalguapa in DecemberGuatemala · 74 kmHigh 28.4°C · Low 18.0°C · 17 mm rain
- Tapachula in DecemberMexico · 75 kmHigh 29.0°C · Low 19.1°C · 44 mm rain
- Chichicastenango in DecemberGuatemala · 76 kmHigh 20.0°C · Low 11.6°C · 13 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.