Last updated: June 24, 2025
In January, the average temperature in Walnut Creek, United States hovers around 7°C (45°F), with a minimum of -13°C (10°F) and a maximum of 26°C (79°F). Expect about 88 mm (3.5 in) of precipitation over 8 days, accompanied by an average humidity level of 85%. Perfect for those who appreciate a refreshing climate!
In January in Walnut Creek, the average temperature is 7°C (45°F), with maximums reaching 26°C (79°F) and minimums plummeting to -13°C (10°F). Be prepared for a wide range of temperatures if you're traveling during this time!
In Walnut Creek in January, the precipitation amount is 88 mm (3.5 in) over the course of 8 days.
In Walnut Creek in January, humidity is 85%. With an average temperature of 7°C (45°F), this humidity feels like a damp chill that clings to your skin, making outdoor activities less enjoyable and requiring extra layers to stay comfortable while traveling.
In Walnut Creek in January, 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 Walnut Creek for better planning.
UV Risk Categories
Weather in Walnut Creek varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Walnut Creek, focusing on differences in temperature, rainfall, humidity, and UV levels.
Temperature | Precipitation | Humidity | UV | |
---|---|---|---|---|
January Weather | 7°C (45°F) | 88 mm (3.5 inches) | 85% | moderate |
February Weather | 10°C (51°F) | 85 mm (3.3 inches) | 82% | high |
March Weather | 12°C (54°F) | 72 mm (2.8 inches) | 81% | very high |
April Weather | 17°C (63°F) | 104 mm (4.1 inches) | 80% | very high |
May Weather | 22°C (71°F) | 115 mm (4.5 inches) | 81% | extreme |
June Weather | 25°C (77°F) | 139 mm (5.5 inches) | 81% | extreme |
July Weather | 27°C (81°F) | 127 mm (5.0 inches) | 81% | extreme |
August Weather | 26°C (79°F) | 159 mm (6.3 inches) | 80% | very high |
September Weather | 24°C (75°F) | 148 mm (5.8 inches) | 79% | very high |
October Weather | 19°C (67°F) | 65 mm (2.5 inches) | 80% | very high |
November Weather | 12°C (53°F) | 88 mm (3.5 inches) | 85% | moderate |
December Weather | 9°C (49°F) | 107 mm (4.2 inches) | 86% | moderate |