I just planted everything outside after doing a hardening. Seasonal frost is “done”, but there’s always the risk.

This is nothing abnormal, even during the middle of winter the temps can swing 30c+ and be 20c while there’s a foot of snow.

Chinooks

A strong föhn wind can make snow one foot (30 cm)deep almost vanish in one day.[6] The snow partly sublimates[7] and partly melts and evaporates in the dry wind. Chinook winds have been observed to raise winter temperature, often from below −20 °C (−4 °F)to as high as 10–20 °C (50–68 °F) for a few hours or days, then temperatures plummet to their base levels.