Grantham Weather Forecast

    • 52
    • 72

    Chance Rain

    • 41
    • 66

    Rain

    • 41
    • 50

    Chance Rain Showers

    • 42
    • 66

    Partly Sunny

    • 57
    • 75

    Chance Rain Showers

    • 39
    • 66

    Slight Chance Rain Showers

    • 43
    • 62

    Partly Sunny

Today 25 Apr Sullivan

Cloudy with isolated Showers. Highs around 70. Light and variable Winds. Chance of rain 20 percent.

Tonight 25 Apr Sullivan

Cloudy. A chance of rain this Evening, then rain likely after midnight. Lows in the mid 50s. Southeast Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grantham Temperature Statistics

April Temperature

Lebanon Municipal Airport (12.4 miles)

  • Lowest 10 April, 2025

    19.9 °F

  • Average April

    45.2 °F

  • Highest 19 April, 2025

    78.7 °F

Climate (2020–Present)

Lebanon Municipal Airport (12.4 miles)

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  • Average Low 2020–2025

    38.1 °F

  • Average 2020–2025

    48.7 °F

  • Average High 2020–2025

    59.8 °F
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