"Where's the Sun?" You Can Ask This iPhone Weather App

Q - What do San Francisco, Calgary, Halifax and Santiago have in common?

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    NEWSLETTERS

    Q - What do San Francisco, Calgary, Halifax and Santiago have in common?

    A - Microclimates.

    In this city, temperatures can vary as much as 9 degrees Fahrenheit from block to block, especially in the summer, and 30 degrees throughout the broader Bay Area.

    Thus, the common advice to visitors here has always been to “dress in layers.”

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