San Antonio Heights Weather Forecast

    • 57
    • 70

    Mostly Sunny

    • 57
    • 68

    Partly Sunny

    • 57
    • 67

    Mostly Cloudy

    • 55
    • 67

    Mostly Sunny

    • 55
    • 64

    Rain Showers

    • 55
    • 58

    Rain Showers

    • 53
    • 57

    Rain Showers Likely

Today 19 Dec San Bernardino and Riverside County Valleys-The Inland Empire

Mostly sunny. Highs 76 to 80. Light Winds becoming southwest 10 Mph this afternoon.

Tonight 19 Dec San Bernardino and Riverside County Valleys-The Inland Empire

Mostly clear this evening. Becoming partly cloudy. Colder. Lows 43 to 48 in wind Sheltered Areas to 48 to 55 in warmer Locations. Light Winds.

Graph Plots Open in Graphs
  • Temperature Forecast NOAA

  • Temperature Real-Time

San Antonio Heights Temperature Statistics

December Temperature

Brackett Field Airport (8.1 miles)

  • Lowest 5 December, 2025

    42.8 °F
  • Average December

    63.9 °F
  • Highest 10 December, 2025

    86 °F

Climate (2020–Present)

Brackett Field Airport (8.1 miles)

Take a look at our website widgetsAvailable free! Find Out More
  • Average Low 2020–2025

    55.5 °F
  • Average 2020–2025

    67.6 °F
  • Average High 2020–2025

    75.6 °F
Get WillyWeather+ to remove ads