Mast Park Weather Forecast

    • 49
    • 81

    Partly Sunny

    • 47
    • 78

    Mostly Sunny

    • 47
    • 80

    Mostly Sunny

    • 47
    • 76

    Mostly Cloudy

    • 48
    • 73

    Mostly Cloudy

    • 48
    • 70

    Mostly Cloudy

    • 49
    • 70

    Mostly Cloudy

Today 18 Jan San Diego County Inland Valleys

Partly cloudy this morning. Becoming mostly sunny. Highs 76 to 81. Areas of Winds east 10 to 15 Mph with Gusts to 25 Mph becoming west this afternoon.

Tonight 18 Jan San Diego County Inland Valleys

Mostly clear this evening. Becoming partly cloudy. Lows 44 to 53 in wind Sheltered Areas to 50 to 55 in warmer Locations. Light Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mast Park Temperature Statistics

January Temperature

Gillespie Field Airport (1.2 miles)

  • Lowest 10 January, 2026

    35.6 °F

  • Average January

    53.4 °F

  • Highest 14 January, 2026

    82.4 °F

Climate (2021–Present)

Gillespie Field Airport (1.2 miles)

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  • Average Low 2021–2026

    53.2 °F

  • Average 2021–2026

    60.2 °F

  • Average High 2021–2026

    75.8 °F
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