Highest temperature that chilblains can set in

Suppose one is exposed to a cool/cold temperature for 20-40 hours - basically, one or two days, nonstop. What is the highest temperature that this could be for chilblains to still set in, especially in one’s extremities?

55 F?

I’m not sure there is a definite answer for this.

J Ayub Med Coll Abbottabad. 2008 Apr-Jun;20(2):17-20.
Onset of chilblains in relation with weather conditions.
Raza N1, Sajid Mu, Suhail M, Haroon-ur-Rashid.

OSHAgives a high of 60 degrees for formation but without duration and adjacent temperatures, I wouldn’t think you could translate that to an answer for your specific conditions.