I'm reading a journal paper that uses historical rainfall and temperature data for the United States, starting in 1900. The paper says
The [National Weather Service Cooperative] COOP Network consists of more than 20,000 sites across the United States and has monthly precipitation observations for the past 100 years
Are these data publicly available? I'm looking for these historical rainfall and temperature data, for every individual station, in a machine-readable format that I can use to map stations and their corresponding data to US counties.
I am not looking for forecasts, and it's not clear to me which sources of weather data actually have data going back this far. The NOAA pages usually list data starting in 1981.
The paper is
Ramcharan, Rodney. "Inequality and redistribution: evidence from US counties and states, 1890–1930." The Review of Economics and Statistics 92, no. 4 (2010): 729-744.
Unfortunately, the private data provider that compiled these data (Weather Source) no longer offers them. They told me this directly when I contacted them.