Weather in Diamond Bar in August
Diamond Bar, United States averages a high of 32.1°C (89.8°F) and low of 18.5°C (65.3°F) in August, with 0 rain days and 12.7 hours of daily sunshine. Travel score: 99.5/100 (Excellent). The best time to visit Diamond Bar is July.
High
32°C90°F
Low
19°C65°F
🌧️
0
rain days
☀️
12.7
hrs/day sunshine
💧
59%
humidity
100— Excellent
August in Diamond Bar is hot and dry — excellent conditions for exploring.
What are the average temperatures in Diamond Bar?
How much does it rain in Diamond Bar in August?
Diamond Bar receives an average of 3.8mm of rainfall across 0 rainy days in August. The annual total is 393.2mm.
What should I pack for Diamond Bar in August?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
👕
Light, breathable clothing
Hot weather with highs around 32°C
🧢
Sun hat or cap
Protection from intense sun
🧴
Sunscreen SPF 30+
13 hours of sunshine daily
🕶️
Sunglasses
Protect your eyes from bright sun
Recommended
🧥
Evening jacket or cardigan
Temperature drops 14°C from day to night
Traveling to United States in August?
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