Last updated: June 24, 2025
In December, the average temperature in Pearl City, United States hovers around -1°C (31°F), with extreme lows dropping to -21°C (-6°F) and highs reaching up to 19°C (67°F). Expect approximately 50 mm (2.0 in) of precipitation spread over 6 days, contributing to an average humidity of 81%.
In December in Pearl City, the average temperature is -1°C (31°F), with maximums reaching 19°C (67°F) and minimums dropping as low as -21°C (-6°F). Travelers should be prepared for a wide range of temperatures, from chilly winter conditions to surprisingly mild days.
In Pearl City in December, the precipitation amount is 50 mm (2.0 in) over the course of 6 days.
In Pearl City in December humidity is 81%. With an average temperature of -1°C (31°F), this humidity feels like a heavy, cold mist that clings to your skin, making outdoor adventures damp and challenging.
In Pearl City in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Pearl City, you can visit Hourly UV Index in Pearl City.
UV Risk Categories
Weather in Pearl City varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Pearl City, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -5°C (23°F) | 58 mm (2.3 inches) | 85% | moderate |
| February Weather | -4°C (25°F) | 58 mm (2.3 inches) | 85% | moderate |
| March Weather | 3°C (38°F) | 73 mm (2.9 inches) | 85% | high |
| April Weather | 9°C (48°F) | 100 mm (3.9 inches) | 85% | very high |
| May Weather | 16°C (61°F) | 148 mm (5.8 inches) | 78% | very high |
| June Weather | 22°C (72°F) | 119 mm (4.7 inches) | 80% | very high |
| July Weather | 24°C (76°F) | 84 mm (3.3 inches) | 78% | very high |
| August Weather | 22°C (72°F) | 93 mm (3.7 inches) | 76% | very high |
| September Weather | 19°C (67°F) | 121 mm (4.8 inches) | 79% | very high |
| October Weather | 11°C (53°F) | 110 mm (4.3 inches) | 83% | moderate |
| November Weather | 3°C (37°F) | 46 mm (1.8 inches) | 88% | moderate |
| December Weather | -1°C (31°F) | 50 mm (2.0 inches) | 81% | low |