December in Retalhuleu averages 30°C (86°F) during the day and 21°C (70°F) at night. Around 43 mm (1.7 in) of rainfall is typical for this time of year.
Should you favor a climate that's both dry and comfortably warm, January and February typically offer the most agreeable circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
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Pick a month to see the average temperature, rainfall and sunshine in Retalhuleu - and find the best time to visit.
49-year average (1976-2025)
Based on our historical records, temperatures in Retalhuleu typically stay consistent throughout December, with daily highs averaging around 30°C (86°F). Nights are warm, with lows around 21°C (70°F).
49-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Browse day-by-day weather records for Retalhuleu spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
The extremes listed below come from historical weather data collected in Retalhuleu from 2006 through 2025.
Find out more about the weather in Guatemala and which places have the best travel conditions in this month. See all of Guatemala in December →
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
Warm temperatures in December make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Rain gear is recommended, you can expect wet weather on multiple days. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Temperature Rainfall Sunshine Humidity
See the full Retalhuleu climate overview or explore weather in Guatemala.
Where to go in December - average daytime high across popular destinations.
Flores
30°C (86°F) Rio Dulce Town
28°C (82°F) Guatemala City
26°C (79°F) Antigua Guatemala26°C (79°F) Cobán23°C (73°F) Panajachel22°C (72°F) Quetzaltenango22°C (72°F) Need travel inspiration? Check out our bucket list articles and be inspired.
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