What causes microclimates in a city?

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I grew up right outside of San Francisco and was conditioned to dress in layers as the weather is so dependent on where in the city you are. I never understood why though. Thanks!

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Anonymous 0 Comments

The landscape around you has a huge influence on the climate of an area.

For example an area primarily consisting of open, concrete areas will typically heat up quicker and feel hotter.
An area with a lot of plants and vegetation will be cooler, as the plants will help create shade and diffuse the heat of the sun.
An area near a body of water may be more humid or slightly cooler as the water acts like a heat sink absorbing the warmth of the sun and evaporating.
Wind patterns will be affected by the shape of the surrounding landscape and the way the air flows around it.

Add together all of these factors and more, and an area will develop a specific signature to the weather patterns it typically experiences.

Often these patterns will gradually change and it won’t really be too noticeable, but in certain locations you will find a much more abrupt line – where a certain geographical feature like a hill divides two areas, or a specific wind pattern flowing down a valley is suddenly cut off or redirected there can be quite a sudden change.

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