Last updated: June 24, 2025
The average temperature in Georgetown, United States during December hovers around 5°C (41°F), with a range that can dip to a brisk -12°C (10°F) and peak at a comfortable 21°C (70°F). Expect some precipitation as well, with around 128 mm (5.1 in) falling over approximately 10 days. Don't forget your umbrella, as the average humidity sits at a high 87%!
In December in Georgetown, the average temperature is 5°C (41°F). Maximum can reach 21°C (70°F) and minimum can be as low as -12°C (10°F). Travelers should be prepared for a wide range of temperatures, from chilly days to surprisingly warm afternoons.
In Georgetown in December, the precipitation amount is 128 mm (5.1 in) spread over a period of 10 days.
In Georgetown in December humidity is 87%. With an average temperature of 5°C (41°F), this humidity feels like a heavy, damp blanket enveloping you, making every step seem laborious and the chill more biting, which can be quite challenging for traveling.
In Georgetown in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Georgetown, you can check the information here.
UV Risk Categories
Weather in Georgetown varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Georgetown, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 2°C (35°F) | 94 mm (3.7 inches) | 88% | moderate |
| February Weather | 4°C (40°F) | 135 mm (5.3 inches) | 88% | moderate |
| March Weather | 8°C (47°F) | 132 mm (5.2 inches) | 87% | high |
| April Weather | 13°C (55°F) | 141 mm (5.6 inches) | 85% | very high |
| May Weather | 19°C (67°F) | 127 mm (5.0 inches) | 81% | very high |
| June Weather | 23°C (74°F) | 180 mm (7.1 inches) | 82% | very high |
| July Weather | 25°C (78°F) | 99 mm (3.9 inches) | 81% | very high |
| August Weather | 24°C (76°F) | 96 mm (3.8 inches) | 73% | very high |
| September Weather | 21°C (71°F) | 129 mm (5.1 inches) | 73% | very high |
| October Weather | 15°C (60°F) | 110 mm (4.3 inches) | 78% | high |
| November Weather | 7°C (45°F) | 88 mm (3.5 inches) | 89% | moderate |
| December Weather | 5°C (41°F) | 128 mm (5.1 inches) | 87% | moderate |