WeatherData
WeatherData[loc,"property"] gives the most recent measurement for the specified weather property at the location corresponding to loc.
WeatherData[loc,"property",date] gives all measurements during the specified date.
WeatherData[loc,"property",{start,end}] gives a list of dates and measurements for the time interval start to end.
WeatherData[loc,"property",{start,end,step}] gives measurements aggregated over the time period represented by step.
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