Rio Vista Park Weather Forecast
- 72
- 83
Rain Showers
- 73
- 92
Becoming Sunny
- 74
- 93
Mostly Sunny
- 74
- 96
Mostly Sunny
- 72
- 93
Mostly Sunny
- 69
- 89
Mostly Sunny
- 67
- 85
Mostly Sunny
Today 6 Sep Orange County Inland
Cloudy with Showers likely this Morning, then mostly cloudy with a chance of Showers this afternoon. Highs 82 to 85. Areas of Winds northeast to 10 Mph. Chance of measurable precipitation 70 percent.
Tonight 6 Sep Orange County Inland
Partly cloudy. Lows 67 to 72. Light Winds.
Rio Vista Park Temperature Statistics
September Temperature
Fullerton, Fullerton Municipal Airport (6.8 miles)
Lowest 2 September, 2026
63.6 °FAverage September
74 °FHighest 1 September, 2026
85.6 °F
Climate (2021–2026)
Fullerton, Fullerton Municipal Airport (6.8 miles)
Average Low 2021–2026
57.1 °FAverage 2021–2026
66.6 °FAverage High 2021–2026
76.9 °F