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by lotsofpulp 1074 days ago
Wet bulb temperatures and dew point are what determine how comfortable it is outdoors.

https://en.wikipedia.org/wiki/100th_meridian_west

> In the United States, this meridian roughly marks the boundary between the semi-arid climate in the west and the humid continental and humid subtropical climates in the east and is used as shorthand to refer to that arid-humid boundary.