Weather in Costa Mesa in May
Costa Mesa, United States averages a high of 20.5°C (68.9°F) and low of 13.5°C (56.3°F) in May, with 2 rain days and 12.6 hours of daily sunshine. Travel score: 88.4/100 (Excellent). The best time to visit Costa Mesa is July.
High
21°C69°F
Low
14°C56°F
🌧️
2
rain days
☀️
12.6
hrs/day sunshine
💧
75%
humidity
88— Excellent
May in Costa Mesa is mild and dry — ideal for sightseeing and outdoor activities.
What are the average temperatures in Costa Mesa?
How much does it rain in Costa Mesa in May?
Costa Mesa receives an average of 8.7mm of rainfall across 2 rainy days in May. The annual total is 310.6mm.
What should I pack for Costa Mesa in May?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
🧥
Mix of light and warm layers
Mild temperatures around 21°C
🧴
Sunscreen SPF 30+
13 hours of sunshine daily
🕶️
Sunglasses
Protect your eyes from bright sun
Traveling to United States in May?
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