Weather in Diamond Bar in January
Diamond Bar, United States averages a high of 17.7°C (63.9°F) and low of 6.2°C (43.2°F) in January, with 6 rain days and 8.6 hours of daily sunshine. Travel score: 76.8/100 (Good). The best time to visit Diamond Bar is July.
High
18°C64°F
Low
6°C43°F
🌧️
6
rain days
☀️
8.6
hrs/day sunshine
💧
66%
humidity
77— Good
January in Diamond Bar is mild and mostly dry — good for most activities.
What are the average temperatures in Diamond Bar?
How much does it rain in Diamond Bar in January?
Diamond Bar receives an average of 81.3mm of rainfall across 6 rainy days in January. The annual total is 393.2mm.
What should I pack for Diamond Bar in January?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
🧥
Mix of light and warm layers
Mild temperatures around 18°C
Recommended
🧴
Sunscreen
Sun protection is still recommended
🕶️
Sunglasses
Useful for sunny periods
Traveling to United States in January?
Don't let a public holiday surprise you — restaurants, shops, and attractions may be closed.
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Data based on 1994–2024 averages · Last updated: 2024-12-31