Last updated: August 23, 2025
In December, the average temperature in Nueva Santa Rosa, Guatemala is a pleasant 18°C (65°F). While you might enjoy warm days peaking at 29°C (84°F), don’t be surprised if the mercury dips to a cool 8°C (46°F) at times. Expect 17 mm (0.7 in) of rain spread across 3 days, and prepare for a fairly humid atmosphere, with average humidity levels at 76%.
In December in Nueva Santa Rosa, the average temperature is 18°C (65°F). Maximums can reach 29°C (84°F) and minimums can be as low as 8°C (46°F). This mild climate makes it an ideal time for travelers to explore and enjoy outdoor activities.
In Nueva Santa Rosa in December, the precipitation amount is 17 mm (0.7 in) over the course of 3 days.
In Nueva Santa Rosa 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 Nueva Santa Rosa in December, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Nueva Santa Rosa.
UV Risk Categories
Weather in Nueva Santa Rosa varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Nueva Santa Rosa, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 18°C (64°F) | 8 mm (0.3 inches) | 76% | extreme |
| February Weather | 19°C (66°F) | 9 mm (0.4 inches) | 68% | extreme |
| March Weather | 20°C (68°F) | 7 mm (0.3 inches) | 59% | extreme |
| April Weather | 21°C (70°F) | 62 mm (2.5 inches) | 57% | extreme |
| May Weather | 21°C (69°F) | 257 mm (10.1 inches) | 65% | extreme |
| June Weather | 20°C (68°F) | 378 mm (14.9 inches) | 66% | extreme |
| July Weather | 20°C (68°F) | 170 mm (6.7 inches) | 75% | extreme |
| August Weather | 20°C (68°F) | 258 mm (10.2 inches) | 82% | extreme |
| September Weather | 20°C (68°F) | 314 mm (12.4 inches) | 82% | extreme |
| October Weather | 19°C (67°F) | 287 mm (11.3 inches) | 83% | extreme |
| November Weather | 19°C (66°F) | 52 mm (2.0 inches) | 80% | very high |
| December Weather | 18°C (65°F) | 17 mm (0.7 inches) | 76% | very high |