Westerville Weather Forecast

    • 61
    • 86

    Rain Showers Likely

    • 56
    • 71

    Mostly Cloudy

    • 52
    • 63

    Rain Showers Likely

    • 49
    • 64

    Chance Rain Showers

    • 51
    • 64

    Mostly Cloudy

    • 54
    • 67

    Chance Rain Showers

    • 55
    • 69

    Chance Rain Showers

Today 18 Sep Custer

Mostly cloudy with a slight chance of Showers in the Morning, then partly sunny in the afternoon. Highs in the upper 60s. Chance of precipitation 20 percent.

Tonight 18 Sep Custer

Mostly cloudy with a chance of Showers and Thunderstorms. Lows in the lower 60s. North Winds around 10 Mph. Chance of precipitation 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Westerville Temperature Statistics

September Temperature

Broken Bow, Broken Bow Municipal Airport (13.7 miles)

  • Lowest 10 September, 2026

    49.6 °F

  • Average September

    71.4 °F

  • Highest 7 September, 2026

    96.7 °F

Climate (2021–2026)

Broken Bow, Broken Bow Municipal Airport (13.7 miles)

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  • Average Low 2021–2026

    37.8 °F

  • Average 2021–2026

    51.3 °F

  • Average High 2021–2026

    65 °F
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