Last updated: June 24, 2025
In December, the average temperature in Spring Valley, United States hovers around 1°C (33°F). Expect a potential low of -21°C (-6°F) and a pleasant peak of 20°C (68°F). During this month, precipitation measures 51 mm (2.0 in) over approximately 6 days, while the average humidity remains high at 84%. Be prepared for a mix of chilly days and a splash of rain!
In December in Spring Valley, the average temperature is 1°C (33°F). The maximum can reach 20°C (68°F), while the minimum can drop as low as -21°C (-6°F). Be prepared for a wide range of temperatures when traveling to Spring Valley during this time.
In Spring Valley in December, the precipitation amount is 51 mm (2.0 in) over the course of 6 days.
In Spring Valley in December humidity is 84%. With an average temperature of 1°C (33°F), this humidity feels like an icy blanket, making travel uncomfortable and breathless as the frigid air clings to your skin and dampens your clothes.
In Spring Valley 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 Spring Valley, you can visit Hourly UV Index in Spring Valley.
UV Risk Categories
Weather in Spring Valley varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Spring Valley, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -4°C (26°F) | 58 mm (2.3 inches) | 82% | moderate |
| February Weather | -2°C (28°F) | 64 mm (2.5 inches) | 83% | moderate |
| March Weather | 5°C (41°F) | 93 mm (3.7 inches) | 84% | high |
| April Weather | 10°C (50°F) | 114 mm (4.5 inches) | 85% | very high |
| May Weather | 17°C (63°F) | 160 mm (6.3 inches) | 79% | very high |
| June Weather | 23°C (74°F) | 152 mm (6.0 inches) | 82% | extreme |
| July Weather | 25°C (76°F) | 105 mm (4.1 inches) | 80% | very high |
| August Weather | 23°C (74°F) | 76 mm (3.0 inches) | 81% | very high |
| September Weather | 20°C (69°F) | 83 mm (3.3 inches) | 80% | very high |
| October Weather | 13°C (55°F) | 134 mm (5.3 inches) | 82% | high |
| November Weather | 4°C (40°F) | 54 mm (2.1 inches) | 88% | moderate |
| December Weather | 1°C (33°F) | 51 mm (2.0 inches) | 84% | low |