Last updated: June 24, 2025
In December, the average temperature in Castle Dale, United States hovers around -4°C (25°F), with extremes ranging from a brisk -22°C (-8°F) to a milder 14°C (57°F). Expect a total precipitation of 26 mm (1.0 in) over approximately 6 days, coupled with a high average humidity of 87%. Whether you’re bundling up or preparing for light drizzles, this month in Castle Dale promises a unique winter experience!
In December in Castle Dale, the average temperature is -4°C (25°F), with maximums reaching 14°C (57°F) and minimums dropping as low as -22°C (-8°F). This makes it essential for travelers to pack warm clothing and prepare for a wide range of weather conditions.
In Castle Dale in December, the precipitation amount is 26 mm (1.0 in) over the course of 6 days.
In Castle Dale in December humidity is 87%. With an average temperature of -4°C (25°F), this humidity feels like a biting chill that clings to your skin, making every step outside feel like an endeavor as the cold damp air numbs your senses and weighs you down, creating an atmosphere that is both invigorating and challenging for traveling.
In Castle Dale 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 Castle Dale for better planning.
UV Risk Categories
Weather in Castle Dale varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Castle Dale, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -5°C (23°F) | 29 mm (1.2 inches) | 87% | moderate |
| February Weather | -3°C (27°F) | 31 mm (1.2 inches) | 88% | high |
| March Weather | 3°C (38°F) | 38 mm (1.5 inches) | 77% | very high |
| April Weather | 8°C (46°F) | 19 mm (0.7 inches) | 69% | very high |
| May Weather | 13°C (56°F) | 31 mm (1.2 inches) | 54% | extreme |
| June Weather | 21°C (69°F) | 11 mm (0.4 inches) | 45% | extreme |
| July Weather | 24°C (76°F) | 23 mm (0.9 inches) | 37% | extreme |
| August Weather | 23°C (73°F) | 21 mm (0.8 inches) | 34% | extreme |
| September Weather | 17°C (64°F) | 21 mm (0.8 inches) | 47% | very high |
| October Weather | 8°C (46°F) | 30 mm (1.2 inches) | 67% | high |
| November Weather | 3°C (37°F) | 20 mm (0.8 inches) | 82% | moderate |
| December Weather | -4°C (25°F) | 26 mm (1.0 inches) | 87% | moderate |