Waltham Weather Forecast

    • 65
    • 75

    Thunderstorms Likely

    • 59
    • 77

    Mostly Cloudy

    • 62
    • 78

    Chance Rain Showers

    • 68
    • 78

    Chance Thunderstorms

    • 70
    • 84

    Chance Rain Showers

    • 68
    • 85

    Chance Thunderstorms

Today 18 Jul Mower

Partly sunny. Near steady temperature in the lower 70s. South Winds 10 to 15 Mph.

Tonight 18 Jul Mower

Mostly cloudy with a chance of Thunderstorms. A slight chance of Showers in the Evening, then Showers after midnight. Warmer with Lows in the mid 60s. South Winds 5 to 10 Mph. Chance of rain 80 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Waltham Temperature Statistics

July Temperature

Austin Municipal (10.6 miles)

  • Lowest 13 July, 2025

    55.4 °F

  • Average July

    74.1 °F

  • Highest 3 July, 2025

    89.6 °F

Climate (2020–Present)

Austin Municipal (10.6 miles)

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  • Average Low 2020–2025

    38.4 °F

  • Average 2020–2025

    47.8 °F

  • Average High 2020–2025

    57.2 °F
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