Original sentence: Nights, however, tend too cool off more so than in the Sacramento Valley below.Winters are generally cold and rainy with highs averaging in the 40s to 50s and nights occasionally dropping below freezing
Edited sentence: Nights, however, tend to cool off more so than in the Sacramento Valley below.Winters are generally cold and rainy, with highs averaging in the 40s to 50s and nights occasionally dropping below freezing