Costa Mesa, California hourly weather forecast
Saturday 14 November 2026 | 19:07
18°
Overcast
Feels like 19°
- High
- 20°
- Low
- 16°
- Humidity
- 81%
- Wind
- 4 km/h
Hourly forecast / Costa Mesa
Conditions hour by hour
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Chance of rain
Wind speed
Humidity
Temperature and rain / Costa Mesa
The coming days
High
24°
Low
12°
Average high
21.7°
Average low
16.5°
Total rain
36.4 mm
Average rain
2.4 mm
Air quality - Costa Mesa
Particles and ozone
Good
5.00 µg/m³
0-1212-3535-5555+
The air is clean: enjoy the outdoors.
PM108.10µg/m³
Ozone83µg/m³
Data updated hourly
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Frequently asked questions
Quick answers about the weather in Costa Mesa
Tomorrow in Costa Mesa, expect Clear sky ☀️, with:\n\n- High of 21°\n- Low of 14°
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Our data is updated regularly to give you the most reliable forecast.
Last updated: 2026-11-15