Marcellus Weather Forecast

    • 59
    • 85

    Rain Showers Likely

    • 54
    • 72

    Becoming Sunny

    • 64
    • 79

    Partly Sunny

    • 63
    • 82

    Rain Showers

    • 57
    • 74

    Chance Rain Showers

    • 56
    • 75

    Mostly Sunny

    • 60
    • 81

    Partly Sunny

Today 18 Jul Onondaga

Thunderstorms likely with Showers. Patchy smoke. Some Thunderstorms may be severe. Highs in the mid 80s. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain near 100 percent.

Tonight 18 Jul Onondaga

Showers likely with a chance of Thunderstorms late this Evening, then partly cloudy with a chance of Showers after midnight. Lows in the upper 50s. Northwest Winds 10 to 15 Mph. Chance of rain 70 percent.

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Marcellus Temperature Statistics

July Temperature

Syracuse, Syracuse Hancock International Airport (14.3 miles)

  • Lowest 12 July, 2026

    57.7 °F

  • Average July

    77.4 °F

  • Highest 14 July, 2026

    98.7 °F

Climate (2021–2026)

Syracuse, Syracuse Hancock International Airport (14.3 miles)

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  • Average Low 2021–2026

    42.6 °F

  • Average 2021–2026

    51.6 °F

  • Average High 2021–2026

    60.6 °F
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