If you're looking just for air density, then look for data from local airports. They're usually pretty accurate.
Otherwise, yeah, Wunderground, but if you look a few stations you'll see the difference in values. Maybe take the mean from say, half a dozen?
@Sam started
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If you're looking just for air density, then look for data from local airports. They're usually pretty accurate.
Otherwise, yeah, Wunderground, but if you look a few stations you'll see the difference in values. Maybe take the mean from say, half a dozen?