Main Post Weather Forecast

    • 53
    • 60

    Mostly Sunny

    • 53
    • 59

    Increasing Clouds

    • 54
    • 60

    Partly Sunny

    • 54
    • 59

    Partly Sunny

    • 53
    • 58

    Partly Sunny

    • 54
    • 58

    Partly Sunny

    • 54
    • 58

    Breezy

Today 20 May San Francisco

Sunny. Highs in the lower 60s to mid 70s. West Winds around 10 Mph.

Tonight 20 May San Francisco

Mostly clear in the evening then becoming partly cloudy. Lows in the upper 40s to mid 50s. Southwest Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Main Post Temperature Statistics

May Temperature

San Francisco, San Francisco International Airport (13 miles)

  • Lowest 11 May, 2026

    50.6 °F

  • Average May

    59.9 °F

  • Highest 18 May, 2026

    79 °F

Climate (2021–Present)

San Francisco, San Francisco International Airport (13 miles)

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  • Average Low 2021–2026

    52.5 °F

  • Average 2021–2026

    58.6 °F

  • Average High 2021–2026

    66.7 °F
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