From that I don't know what relative effects happen in the nighttime set, but it seems to me that it would be most extreme then, because as anyone familiar with high country will confirm, not only are temperatures cooler in general, but there is
a larger daily variation at higher altitudes.
A set of long, nearly complete
daily precipitation series for Alaska spanning the latter half of the 20th century has been analyzed for seasonal relationships between
variations in mean, heavy, and extreme precipitation and
large - scale atmospheric circulation
variations at interannual, decadal, and secular timescales.