Last updated: June 24, 2025
In December, the average temperature in Long Beach, United States hovers around 2°C (35°F), with extremes ranging from a chilly -19°C (-2°F) to a milder 15°C (60°F). Expect about 63 mm (2.5 in) of precipitation over 10 days, and be prepared for a high average humidity of 86%.
In December in Long Beach, the average temperature is 2°C (35°F). Maximum temperatures can reach 15°C (60°F), while minimum temperatures can drop as low as -19°C (-2°F). Be prepared for a wide range of temperatures during your visit, so pack accordingly for both mild and crisp conditions.
In Long Beach in December, the precipitation amount is 63 mm (2.5 in) over a span of 10 days.
In Long Beach in December humidity is 86%. With an average temperature of 2°C (35°F), this humidity feels like a damp chill that seeps into your bones, making traveling quite uncomfortable as your clothes cling to you and the cold air cuts through any warmth you try to find.
In Long Beach 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 Long Beach, you can visit Hourly UV Index in Long Beach.
UV Risk Categories
Weather in Long Beach varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Long Beach, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -2°C (29°F) | 73 mm (2.9 inches) | 85% | moderate |
| February Weather | -2°C (30°F) | 73 mm (2.9 inches) | 85% | moderate |
| March Weather | 3°C (39°F) | 91 mm (3.6 inches) | 86% | high |
| April Weather | 8°C (47°F) | 105 mm (4.2 inches) | 87% | very high |
| May Weather | 15°C (59°F) | 161 mm (6.3 inches) | 81% | very high |
| June Weather | 21°C (71°F) | 133 mm (5.2 inches) | 82% | very high |
| July Weather | 24°C (76°F) | 100 mm (3.9 inches) | 81% | very high |
| August Weather | 23°C (73°F) | 99 mm (3.9 inches) | 79% | very high |
| September Weather | 20°C (68°F) | 75 mm (2.9 inches) | 78% | very high |
| October Weather | 13°C (56°F) | 139 mm (5.5 inches) | 81% | high |
| November Weather | 5°C (42°F) | 72 mm (2.8 inches) | 89% | moderate |
| December Weather | 2°C (35°F) | 63 mm (2.5 inches) | 86% | low |