Last updated: August 23, 2025
In San Juan Chamelco, Guatemala, the average temperature in December hovers around 18°C (65°F), with minimums dipping to 9°C (48°F) and maximums reaching 28°C (83°F). Expect 151 mm (5.9 in) of precipitation over approximately 18 days, contributing to an average humidity of 76%.
In December in San Juan Chamelco, the average temperature is 18°C (65°F), with maximums reaching 28°C (83°F) and minimums dropping as low as 9°C (48°F). This pleasant climate makes San Juan Chamelco an ideal destination for outdoor activities and exploration during this time.
In San Juan Chamelco in December, the precipitation amount is 151 mm (5.9 in) during 18 days, indicating a significant level of rainfall for that period.
In San Juan Chamelco in December, humidity is 76%. With an average temperature of 18°C (65°F), this humidity feels like a warm embrace, making travel a little sticky but enjoyable, as long as you stay hydrated and take breaks in the shade.
In San Juan Chamelco in December, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in San Juan Chamelco.
UV Risk Categories
Weather in San Juan Chamelco varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in San Juan Chamelco, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 18°C (64°F) | 165 mm (6.5 inches) | 76% | very high |
| February Weather | 19°C (66°F) | 98 mm (3.9 inches) | 68% | extreme |
| March Weather | 19°C (67°F) | 112 mm (4.4 inches) | 59% | extreme |
| April Weather | 22°C (71°F) | 101 mm (4.0 inches) | 57% | extreme |
| May Weather | 22°C (73°F) | 252 mm (9.9 inches) | 65% | extreme |
| June Weather | 22°C (72°F) | 417 mm (16.4 inches) | 66% | extreme |
| July Weather | 21°C (71°F) | 255 mm (10.0 inches) | 75% | extreme |
| August Weather | 22°C (71°F) | 337 mm (13.3 inches) | 82% | extreme |
| September Weather | 22°C (71°F) | 378 mm (14.9 inches) | 82% | extreme |
| October Weather | 21°C (70°F) | 427 mm (16.8 inches) | 83% | extreme |
| November Weather | 19°C (67°F) | 333 mm (13.1 inches) | 80% | very high |
| December Weather | 18°C (65°F) | 151 mm (5.9 inches) | 76% | very high |