Last updated: June 24, 2025
In Contra Costa Centre, United States, the average temperature in December hovers around 10°C (50°F). Be prepared for a range, as temperatures can dip to a chilly 2°C (36°F) or soar to a warm 24°C (75°F). Expect 75 mm (2.9 in) of precipitation spread over 8 days, accompanied by an average humidity of 80%.
In December in Contra Costa Centre, the average temperature is 10°C (50°F), with maximums reaching up to 24°C (75°F) and minimums dropping as low as 2°C (36°F). This variation in temperature offers travelers a mix of mild days and cooler evenings, making it a great time to explore the area while dressing in layers.
In Contra Costa Centre in December, the precipitation amount is 75 mm (2.9 in) over a span of 8 days.
In Contra Costa Centre in December, humidity is 80%. With an average temperature of 10°C (50°F), this humidity feels like a damp chill enveloping you, making traveling somewhat uncomfortable as it seeps into your clothes and clings to your skin, leaving you longing for a cozy indoor refuge.
In Contra Costa Centre 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 Contra Costa Centre, you can check the information here.
UV Risk Categories
Weather in Contra Costa Centre varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Contra Costa Centre, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 10°C (50°F) | 99 mm (3.9 inches) | 82% | moderate |
| February Weather | 11°C (53°F) | 89 mm (3.5 inches) | 84% | moderate |
| March Weather | 13°C (55°F) | 72 mm (2.8 inches) | 82% | very high |
| April Weather | 15°C (59°F) | 31 mm (1.2 inches) | 78% | very high |
| May Weather | 17°C (63°F) | 16 mm (0.6 inches) | 71% | very high |
| June Weather | 20°C (68°F) | 1 mm (0.1 inches) | 64% | extreme |
| July Weather | 20°C (68°F) | 0 mm (0.0 inches) | 58% | extreme |
| August Weather | 20°C (69°F) | 0 mm (0.0 inches) | 54% | very high |
| September Weather | 20°C (69°F) | 1 mm (0.0 inches) | 55% | very high |
| October Weather | 18°C (64°F) | 23 mm (0.9 inches) | 62% | high |
| November Weather | 13°C (56°F) | 37 mm (1.5 inches) | 78% | moderate |
| December Weather | 10°C (50°F) | 75 mm (2.9 inches) | 80% | moderate |