Catalog https://icdc.cen.uni-hamburg.de/thredds/aggregationKnscDewpointCatalog.html

Dataset	Size	Last Modified
`KNSC dew point 1950s`		`--`
`KNSC dew point 1960s`		`--`
`KNSC dew point 1970s`		`--`
`KNSC dew point 1980s`		`--`
`KNSC dew point 1990s`		`--`
`KNSC dew point 2000s`		`--`
`KNSC dew point 2010s`		`--`

ICDC TDS at Integrated Climate Data Center (ICDC) / University of Hamburg see Info
Documentation