Last updated: June 24, 2025
In December, the average temperature in Stockton, United States hovers around -1°C (31°F). While the mercury can dip as low as -21°C (-6°F), it can also rise to a pleasant 19°C (67°F). Be prepared for some rain, with 48 mm (1.9 in) of precipitation expected over 6 days. The air will feel quite humid, with an average humidity level of 82%.
In December in Stockton, 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 Stockton in December, the precipitation amount is 48 mm (1.9 in) distributed over 6 days.
In Stockton in December humidity is 82%. With an average temperature of -1°C (31°F), this humidity feels like a heavy, biting chill that seeps through layers of clothing, making outdoor activities uncomfortable and urging travelers to seek shelter or warm beverages to combat the cold.
In Stockton 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 Stockton, you can visit Hourly UV Index in Stockton.
UV Risk Categories
Weather in Stockton varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Stockton, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -5°C (23°F) | 57 mm (2.2 inches) | 84% | moderate |
| February Weather | -4°C (24°F) | 58 mm (2.3 inches) | 85% | moderate |
| March Weather | 3°C (38°F) | 72 mm (2.8 inches) | 84% | high |
| April Weather | 9°C (48°F) | 96 mm (3.8 inches) | 83% | very high |
| May Weather | 16°C (61°F) | 145 mm (5.7 inches) | 75% | very high |
| June Weather | 22°C (72°F) | 120 mm (4.7 inches) | 79% | very high |
| July Weather | 24°C (76°F) | 84 mm (3.3 inches) | 75% | very high |
| August Weather | 22°C (72°F) | 100 mm (3.9 inches) | 69% | very high |
| September Weather | 19°C (67°F) | 117 mm (4.6 inches) | 74% | very high |
| October Weather | 11°C (52°F) | 110 mm (4.3 inches) | 79% | moderate |
| November Weather | 3°C (37°F) | 45 mm (1.8 inches) | 88% | moderate |
| December Weather | -1°C (31°F) | 48 mm (1.9 inches) | 82% | low |