Fairfax Weather Forecast

    • 63
    • 79

    Chance Rain Showers

    • 63
    • 80

    Chance Rain Showers

    • 56
    • 78

    Mostly Sunny

    • 55
    • 75

    Partly Sunny

    • 54
    • 72

    Partly Sunny

    • 55
    • 72

    Partly Sunny

Today 26 May New Castle

Patchy fog this morning. Mostly cloudy. Highs in the upper 70s. Northeast Winds around 5 Mph, becoming south this afternoon.

Tonight 26 May New Castle

Mostly cloudy. Showers likely after midnight. Patchy fog after midnight. Lows in the lower 60s. South Winds around 5 Mph. Chance of rain 60 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Fairfax Temperature Statistics

May Temperature

Wilmington, New Castle County Airport (8.1 miles)

  • Lowest 12 May, 2026

    39.7 °F

  • Average May

    64.2 °F

  • Highest 19 May, 2026

    96.7 °F

Climate (2021–Present)

Wilmington, New Castle County Airport (8.1 miles)

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  • Average Low 2021–2026

    47.9 °F

  • Average 2021–2026

    57.3 °F

  • Average High 2021–2026

    66.6 °F
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