Green’s Dictionary of Slang

crimpy adj.

[Irwin, American Tramp and Und. Slang (1931), suggests that such temperatures encourage the crimps, rheumatism]

(US) of weather, unpleasant; of a place, cold.

[US]J. London ‘The Road’ in Hendricks & Shepherd Jack London Reports (1970) 311–21: crimpy, cold.
[US]J. London Road 26: It was the fall of the year, and [...] I could expect ‘crimpy’ weather, and every moment of delay increased the frigid hardships of the journey.
[US]Jackson & Hellyer Vocab. Criminal Sl. 27: crimpy [...] Cold, applied to the weather.
[US] ‘Jargon of the Und.’ in DN V 442: Crimpy weather, Bad weather.
[US]Irwin Amer. Tramp and Und. Sl. 57: Crimpy Weather. – Inclement weather.