Last updated: June 24, 2025
In December, the average temperature in Hesperia, United States hovers around -1°C (31°F), with extremes ranging from a chilly -22°C (-7°F) to a surprisingly warm 15°C (60°F). Expect about 67 mm (2.6 in) of precipitation spread over 12 days, contributing to the 86% average humidity that characterizes this time of year. Bundle up and prepare for a wet, cool climate!
In December in Hesperia, the average temperature is -1°C (31°F), with maximums reaching 15°C (60°F) and minimums dropping as low as -22°C (-7°F). Travelers should be well-prepared for potentially chilly weather and significant temperature variations.
In Hesperia in December, the precipitation amount is 67 mm (2.6 in) distributed over 12 days.
In Hesperia in December humidity is 86%. With an average temperature of -1°C (31°F), this humidity feels like an eerie chill enveloping you, making travel uncomfortable as the damp air bites into your skin and the cold seeps through even the warmest of clothes, creating an atmosphere that is heavy and uninviting.
In Hesperia 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 Hesperia, you can visit Hourly UV Index in Hesperia.
UV Risk Categories
Weather in Hesperia varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Hesperia, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -4°C (25°F) | 60 mm (2.4 inches) | 87% | low |
| February Weather | -3°C (26°F) | 62 mm (2.5 inches) | 87% | moderate |
| March Weather | 2°C (36°F) | 62 mm (2.4 inches) | 86% | moderate |
| April Weather | 7°C (45°F) | 101 mm (4.0 inches) | 87% | very high |
| May Weather | 14°C (58°F) | 127 mm (5.0 inches) | 82% | very high |
| June Weather | 20°C (68°F) | 120 mm (4.7 inches) | 81% | very high |
| July Weather | 23°C (74°F) | 68 mm (2.7 inches) | 78% | very high |
| August Weather | 22°C (71°F) | 89 mm (3.5 inches) | 79% | very high |
| September Weather | 18°C (64°F) | 111 mm (4.4 inches) | 79% | high |
| October Weather | 11°C (52°F) | 129 mm (5.1 inches) | 82% | moderate |
| November Weather | 3°C (38°F) | 62 mm (2.4 inches) | 87% | moderate |
| December Weather | -1°C (31°F) | 67 mm (2.6 inches) | 86% | low |