Weather in Diamond Bar in May
Diamond Bar, United States averages a high of 24.1°C (75.4°F) and low of 12.5°C (54.5°F) in May, with 2 rain days and 12.4 hours of daily sunshine. Travel score: 92.9/100 (Excellent). The best time to visit Diamond Bar is July.
High
24°C75°F
Low
13°C55°F
🌧️
2
rain days
☀️
12.4
hrs/day sunshine
💧
66%
humidity
93— Excellent
May in Diamond Bar is warm and dry — ideal for sightseeing and outdoor activities.
What are the average temperatures in Diamond Bar?
How much does it rain in Diamond Bar in May?
Diamond Bar receives an average of 11.3mm of rainfall across 2 rainy days in May. The annual total is 393.2mm.
What should I pack for Diamond Bar in May?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
👕
Light layers and t-shirts
Warm weather around 24°C
🧴
Sunscreen SPF 30+
12 hours of sunshine daily
🕶️
Sunglasses
Protect your eyes from bright sun
🎉Visiting United States in May?
Don't miss any public holidays — check before you book!
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Data based on 1994–2024 averages · Last updated: 2024-12-31