1) Global Historical Climatology Network — Monthly 2) Global Historical Climatology Network —
Daily 3) US Historical Climatology Network — Monthly 4) World Monthly Surface Station Climatology 5) Hadley Centre / Climate Research Unit Data Collection 6) US Cooperative
Summary of the Month 7) US Cooperative
Summary of the Day 8) US
First Order
Summary of the Day 9) Scientific Committee on Antarctic Research 10) GSN Monthly
Summaries from NOAA 11) Monthly Climatic Data of the World 12) GCOS Monthly
Summaries from DWD 13) World Weather Records (only those published since 1961) 14) Colonial Era Weather Archives