The National Oceanic & Atmospheric Administration (NOAA) has been acquiring and distributing climate and weather data for quite some time. The Physical Sciences Division (PSD) of the NOAA Earth System Research Laboratory (ESRL) is a great course of many forms of data. Here you can find hourly precipitation over the U.S. or the monthly Palmer Drought Severity Index from 1850. Do you want daily Outgoing Longwave Radiation, monthly Soil Moisture from 1948, or Ocean Salinity? How about 2015 Cooling Degree Days Anomaly or last week’s mean Sea Surface Temperature?