Collinsville Weather Forecast

    • 55
    • 81

    Mostly Sunny

    • 53
    • 79

    Mostly Sunny

    • 56
    • 78

    Mostly Sunny

    • 55
    • 81

    Mostly Sunny

    • 55
    • 78

    Mostly Sunny

    • 56
    • 78

    Partly Sunny

Today 21 Mar Carquinez Strait and Delta

Partly cloudy. Highs 83 to 89. West Winds up to 10 Mph with Gusts to around 20 Mph.

Tonight 21 Mar Carquinez Strait and Delta

Mostly clear. Lows around 53. West Winds 10 to 15 Mph.

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Collinsville Temperature Statistics

March Temperature

Concord, Buchanan Field (11.8 miles)

  • Lowest 5 March, 2026

    40.6 °F

  • Average March

    62.5 °F

  • Highest 18 March, 2026

    86 °F

Climate (2021–Present)

Concord, Buchanan Field (11.8 miles)

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  • Average Low 2021–2026

    50.9 °F

  • Average 2021–2026

    61.4 °F

  • Average High 2021–2026

    74.4 °F
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