NOAA NCDC GHCN_Daily version1 QCTMIN Data Files

This dataset has bytes (4.1444357E09 3.8598065GB) of data in it, which should give you a rough idea of the size of any file that you ask for. WMO40

Data restricted by WMO Resolution 40

Global Historical Climatology Network - Daily Ver. 1.0
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LICENSE:

The data and metadata within the Global Historical Climatology Network - Daily Version 1.0 are governed by the following:

"The following data and products have conditions placed on their commercial use. The non-U.S. data cannot be redistributed within or outside of the U.S. for any commercial activities."

For details, please consult:

http://www.wmo.ch/web/pla/Res40Cg-XII.doc