In summer Walla Walla has an average high of  and a low of , and during winter it has a high of  and a low of , although maximum temperatures can reach the mid-40s °C (mid-110s °F) and the area often experiences frosts during winter.
In summer Walla Walla's temperature averages to and ; in winter, it has an average high of and a low of . Maximum temperatures can reach mid-40s °C (mid-110s °F) and frosts are common during winter.