Altitude And Monthly Climate Data At The US County Level?

I’m searching for US county altitude and monthly climate data. Ideally:

FIPS Altitude: minimum altitude, maximum altitude, average altitude across the county Climate: average high temp by month, average low temp by month, average precipitation by month, average humidity by month (or some other meaningful metric of “feel”, like WGBT)

Any pointers? I’m pretty new to gathering these types of datasets, but have been reasonably successful in aggregating FIPS with population and land/water area data, so hoping to add to that.

Eventually looking to add on some demographic, crime rate, educational attainment, and financial (income, housing price) data as well if anyone happens to have a lead on that, but altitude and climate are my priorities at the moment.

Happy to share what I’ve got so far if that’s helpful to anyone.

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Thank you!