Barstow Weather Forecast

    • 65
    • 79

    Chance Rain Showers

    • 67
    • 87

    Chance Thunderstorms

    • 64
    • 88

    Chance Rain Showers

    • 57
    • 79

    Mostly Sunny

    • 53
    • 75

    Partly Sunny

    • 55
    • 74

    Partly Sunny

Today 15 May St. Marys

Mostly cloudy in the Morning, then becoming mostly sunny. Patchy fog in the morning. A 40 percent chance of Showers. Highs around 80. Southwest Winds around 5 Mph.

Tonight 15 May St. Marys

Mostly cloudy with scattered Showers with isolated Thunderstorms. Lows in the mid 60s. South Winds around 5 Mph. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Barstow Temperature Statistics

May Temperature

St Marys County Airport (14.9 miles)

  • Lowest 10 May, 2025

    44.6 °F

  • Average May

    66.5 °F

  • Highest 2 May, 2025

    86 °F

Climate (2020–Present)

St Marys County Airport (14.9 miles)

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  • Average Low 2020–2025

    49.5 °F

  • Average 2020–2025

    58 °F

  • Average High 2020–2025

    66.6 °F
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