Ralph B Clark Regional Park Weather Forecast
- 59
- 77
Increasing Clouds
- 60
- 78
Partly Sunny
- 62
- 81
Partly Sunny
- 63
- 86
Partly Sunny
- 64
- 84
Partly Sunny
- 63
- 83
Mostly Sunny
- 62
- 81
Mostly Sunny
Today 20 Jun Orange County Inland
Mostly cloudy this morning. Becoming sunny. Highs 72 to 76. Areas of Winds southwest to 10 Mph.
Tonight 20 Jun Orange County Inland
Mostly clear this evening. Becoming mostly cloudy. Patchy fog overnight. Lows 53 to 60. Areas of Winds west 10 Mph this evening becoming light.
Ralph B Clark Regional Park Temperature Statistics
June Temperature
Fullerton, Fullerton Municipal Airport (1.2 miles)
Lowest 1 June, 2026
62.7 °FAverage June
71.9 °FHighest 12 June, 2026
92.6 °F
Climate (2021–2026)
Fullerton, Fullerton Municipal Airport (1.2 miles)
Average Low 2021–2026
57 °FAverage 2021–2026
66.5 °FAverage High 2021–2026
76.8 °F