To run the script, the first thing to do is ensure that ChromeDriver is installed. WebDriver is an toolbox for natively running web browsers, so when you render a page with WebDriver, Weather Underground thinks a regular user is accessing their website and you can access the full source code. This is where Selenium WebDriver comes in. Weather Underground has a security policy that blocks automated requests from viewing data stored in each table. It’s possible to view tables of 5-min data from a single day – see this example from a station outside Crested Butte, Colorado – but if you try to scrape the http using something like Python’s requests library, the tables appear blank. Unfortunately, historical data are not easy to access. Weather Undergound stores data from over 250,000 personal weather stations across the world.
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