Last updated: June 24, 2025
In December, the average temperature in Half Moon, United States hovers around 10°C (50°F). Be prepared for a range of temperatures, with a minimum dropping to -5°C (24°F) and a maximum reaching up to 25°C (78°F). During this time, 116 mm (4.6 in) of precipitation is expected over about 10 days, contributing to an average humidity of 86%.
In December in Half Moon, the average temperature is 10°C (50°F), with maximums reaching up to 25°C (78°F) and minimums dropping as low as -5°C (24°F). This variability in temperature makes Half Moon an intriguing destination for travelers who enjoy diverse weather conditions.
In Half Moon in December, the total precipitation amount is 116 mm (4.6 in) over a span of 10 days.
In Half Moon in December humidity is 86%. With an average temperature of 10°C (50°F), this humidity feels like a heavy blanket wrapping around you, making outdoor activities uncomfortable and sticky, which can dampen the spirit of travel.
In Half Moon in December, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Half Moon for better planning.
UV Risk Categories
Weather in Half Moon varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Half Moon, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 8°C (47°F) | 73 mm (2.9 inches) | 85% | moderate |
| February Weather | 11°C (52°F) | 98 mm (3.8 inches) | 82% | high |
| March Weather | 13°C (55°F) | 67 mm (2.6 inches) | 81% | very high |
| April Weather | 17°C (63°F) | 114 mm (4.5 inches) | 80% | very high |
| May Weather | 22°C (72°F) | 122 mm (4.8 inches) | 81% | extreme |
| June Weather | 25°C (77°F) | 191 mm (7.5 inches) | 81% | extreme |
| July Weather | 27°C (80°F) | 176 mm (6.9 inches) | 81% | extreme |
| August Weather | 26°C (79°F) | 215 mm (8.5 inches) | 80% | very high |
| September Weather | 24°C (76°F) | 224 mm (8.8 inches) | 79% | very high |
| October Weather | 20°C (68°F) | 69 mm (2.7 inches) | 80% | very high |
| November Weather | 13°C (55°F) | 110 mm (4.3 inches) | 85% | high |
| December Weather | 10°C (50°F) | 116 mm (4.6 inches) | 86% | moderate |