Weather in Fullerton, California
Wednesday 18 November 2026
20°
Few clouds
Feels like 18°
- High
- 21°
- Low
- 15°
- Humidity
- 34%
- Wind
- 13 km/h
Temperature and rain / Fullerton
The coming days
High
31°
Low
14°
Average high
24.2°
Average low
16.5°
Total rain
20.7 mm
Average rain
1.4 mm
Air quality - Fullerton
Particles and ozone
Moderate
13.20 µg/m³
0-1212-3535-5555+
Acceptable; sensitive people should take care.
PM1014.10µg/m³
Ozone55µg/m³
Data updated hourly
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Frequently asked questions
Quick answers about the weather in Fullerton
Tomorrow in Fullerton, expect Clear sky ☀️, with:\n\n- High of 29°\n- Low of 15°
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Our data is updated regularly to give you the most reliable forecast.
Last updated: 2026-11-11