Last updated: June 24, 2025
In December, the average temperature in Vista West, United States hovers around -4°C (24°F), with a potential minimum of -22°C (-8°F) and a maximum reaching 16°C (61°F). Expect about 25 mm (1.0 in) of precipitation over 5 days, contributing to an average humidity level of 81%. This blend of chilly temperatures and moisture creates a uniquely crisp atmosphere.
In December in Vista West, the average temperature is -4°C (24°F). The maximum can reach 16°C (61°F), and the minimum can be as low as -22°C (-8°F). Travelers should be prepared for a wide range of temperatures and pack accordingly for both cold and mild weather conditions.
In Vista West in December, the total precipitation amount is 25 mm (1.0 in) over a span of 5 days.
In Vista West in December humidity is 81%. With an average temperature of -4°C (24°F), this humidity feels like an icy blanket wrapped around you, making travel challenging as the damp air bites at your skin and seeps into your clothes, leaving you feeling colder than the thermometer suggests.
In Vista West in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Vista West, you can check the information here.
UV Risk Categories
Weather in Vista West varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Vista West, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -6°C (21°F) | 21 mm (0.8 inches) | 79% | moderate |
| February Weather | -7°C (19°F) | 28 mm (1.1 inches) | 81% | high |
| March Weather | 0°C (32°F) | 43 mm (1.7 inches) | 70% | high |
| April Weather | 4°C (40°F) | 54 mm (2.1 inches) | 67% | extreme |
| May Weather | 10°C (51°F) | 61 mm (2.4 inches) | 70% | very high |
| June Weather | 19°C (66°F) | 24 mm (1.0 inches) | 75% | extreme |
| July Weather | 23°C (74°F) | 11 mm (0.4 inches) | 76% | extreme |
| August Weather | 21°C (71°F) | 13 mm (0.5 inches) | 76% | extreme |
| September Weather | 16°C (61°F) | 24 mm (0.9 inches) | 72% | very high |
| October Weather | 5°C (42°F) | 38 mm (1.5 inches) | 70% | high |
| November Weather | 1°C (35°F) | 23 mm (0.9 inches) | 76% | moderate |
| December Weather | -4°C (24°F) | 25 mm (1.0 inches) | 81% | moderate |