Last updated: June 24, 2025
In December, the average temperature in East Valley, United States hovers around -1°C (31°F). Expect chilly conditions, with minimum temperatures plunging to -12°C (10°F) and the mercury rarely exceeding 15°C (59°F). This month typically brings 93 mm (3.6 in) of precipitation over about 9 days, contributing to an average humidity of 82%. Be prepared for a cool and damp atmosphere!
In December in East Valley, the average temperature is -1°C (31°F), with maximums reaching 15°C (59°F) and minimums dropping as low as -12°C (10°F). Be prepared for a range of temperatures if you plan to travel during this time.
In East Valley in December, the precipitation amount is 93 mm (3.6 in) during a span of 9 days.
In East Valley in December humidity is 82%. With an average temperature of -1°C (31°F), this humidity feels like a heavy, biting chill that seeps through layers of clothing, making outdoor activities uncomfortable and urging travelers to seek shelter or warm beverages to combat the cold.
In East Valley 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 East Valley for better planning.
UV Risk Categories
Weather in East Valley varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in East Valley, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 0°C (32°F) | 123 mm (4.8 inches) | 85% | moderate |
| February Weather | 0°C (32°F) | 125 mm (4.9 inches) | 87% | high |
| March Weather | 2°C (35°F) | 96 mm (3.8 inches) | 84% | very high |
| April Weather | 6°C (43°F) | 47 mm (1.8 inches) | 78% | very high |
| May Weather | 11°C (52°F) | 45 mm (1.8 inches) | 64% | extreme |
| June Weather | 17°C (63°F) | 8 mm (0.3 inches) | 56% | extreme |
| July Weather | 22°C (71°F) | 11 mm (0.4 inches) | 44% | extreme |
| August Weather | 21°C (70°F) | 10 mm (0.4 inches) | 34% | extreme |
| September Weather | 17°C (62°F) | 9 mm (0.4 inches) | 41% | very high |
| October Weather | 9°C (49°F) | 38 mm (1.5 inches) | 60% | high |
| November Weather | 5°C (41°F) | 54 mm (2.1 inches) | 81% | moderate |
| December Weather | -1°C (31°F) | 93 mm (3.6 inches) | 82% | moderate |