Last updated: June 24, 2025
In December, the average temperature in Arroyo Seco, United States hovers around -5°C (24°F). Expect chilly conditions, with a minimum dropping to -24°C (-10°F) and a maximum reaching 14°C (57°F). While you’ll be bundling up, don’t forget your umbrella; the region sees about 31 mm (1.2 in) of precipitation over 6 days, accompanied by a high average humidity of 85%.
In December in Arroyo Seco, the average temperature is -5°C (24°F), with maximums reaching 14°C (57°F) and minimums dropping as low as -24°C (-10°F). Travelers should prepare for a wide temperature range, ensuring they have suitable clothing for both chilly conditions and milder days.
In Arroyo Seco in December, the precipitation amount is 31 mm (1.2 in) over a span of 6 days.
In Arroyo Seco in December humidity is 85%. With an average temperature of -5°C (24°F), this humidity feels like a biting chill that penetrates your clothing, making every step outside feel more daunting and uninviting for traveling.
In Arroyo Seco 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 Arroyo Seco for better planning.
UV Risk Categories
Weather in Arroyo Seco varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Arroyo Seco, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -6°C (21°F) | 34 mm (1.3 inches) | 84% | moderate |
| February Weather | -5°C (24°F) | 32 mm (1.2 inches) | 84% | high |
| March Weather | 0°C (33°F) | 45 mm (1.8 inches) | 74% | very high |
| April Weather | 5°C (41°F) | 29 mm (1.2 inches) | 68% | extreme |
| May Weather | 11°C (51°F) | 44 mm (1.7 inches) | 62% | extreme |
| June Weather | 16°C (61°F) | 35 mm (1.4 inches) | 55% | extreme |
| July Weather | 18°C (64°F) | 91 mm (3.6 inches) | 54% | extreme |
| August Weather | 17°C (62°F) | 57 mm (2.3 inches) | 61% | extreme |
| September Weather | 14°C (57°F) | 35 mm (1.4 inches) | 70% | extreme |
| October Weather | 7°C (45°F) | 34 mm (1.4 inches) | 78% | very high |
| November Weather | 1°C (34°F) | 28 mm (1.1 inches) | 81% | high |
| December Weather | -5°C (24°F) | 31 mm (1.2 inches) | 85% | moderate |