Herndon Weather Forecast

    • 65
    • 85

    Rain Likely

    • 63
    • 84

    Chance Rain

    • 62
    • 88

    Mostly Sunny

    • 63
    • 90

    Mostly Sunny

    • 66
    • 93

    Partly Sunny

    • 63
    • 90

    Slight Chance Thunderstorms

    • 61
    • 86

    Mostly Sunny

Today 18 Sep Fresno-Clovis

Not as warm. Cloudy. Slight chance of rain early in the Morning, then chance of rain in the late morning and afternoon. Highs in the mid 80s. Southeast Winds up to 10 Mph. Chance of rain 50 percent.

Tonight 18 Sep Fresno-Clovis

Rain likely early in the Evening, then Showers likely and slight chance of Thunderstorms in the late evening and overnight. Some Thunderstorms may produce heavy rainfall in the late evening and overnight. Lows in the mid 60s. Southwest Winds up to 5 Mph shifting to the southeast after midnight. Chance of precipitation 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Herndon Temperature Statistics

September Temperature

Fresno Chandler Executive Airport (8.7 miles)

  • Lowest 7 September, 2025

    60.8 °F

  • Average September

    78.7 °F

  • Highest 1 September, 2025

    104 °F

Climate (2021–Present)

Fresno Chandler Executive Airport (8.7 miles)

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  • Average Low 2021–2025

    57.4 °F

  • Average 2021–2025

    69.7 °F

  • Average High 2021–2025

    82.2 °F
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