January Weather in Grass Valley

Last updated: March 2, 2024

The weather in Grass Valley, United States, during January is characterized by an average temperature of 7°C (45°F). Highs can soar to 19°C (66°F), while lows may dip to -3°C (27°F). Typically, the humidity level in Grass Valley throughout January hovers around 84%.

Precipitation and Sunshine hours

In January, Grass Valley averages 269 mm (10.6 inches) of rainfall, typically over the course of 12 rainy days. The month enjoys an average of 9 hours 45 minutes of daylight, with the sun shining for approximately 4 hours 33 minutes each day. Additionally, there is a 37% probability of sunny days during this period.

UV Index

In January, the UV Index in Grass Valley reaches a maximum of 3, indicating a level of Moderate exposure. The most intense UV radiation typically occurs between 11:00 and 13:00, during which unprotected skin may burn in as little as 30 minutes.

Monthly weather in Grass Valley

• Grass Valley weather January
• Grass Valley weather February
• Grass Valley weather March
• Grass Valley weather April
• Grass Valley weather May
• Grass Valley weather June
• Grass Valley weather July
• Grass Valley weather August
• Grass Valley weather September
• Grass Valley weather October
• Grass Valley weather November
• Grass Valley weather December