For those seeking warm weather, the ideal time to visit Walla Walla, WA is in July, August and June. During these months, temperatures typically soar to an average of 24.78 °C, and you'll find that July, August and June are the sunniest months, with an average of 150.58 hours of sunshine.
Conversely, if you favor cooler weather, consider planning your trip to Walla Walla, WA in January, December or February. During this period, you can expect an average temperature of -1.73 °C.
For travelers indifferent to temperature but keen to steer clear of rain, it’s wise to avoid visiting during January, February and March, when the average precipitation in Walla Walla, WA reaches 3 mm. Instead, consider the drier months of January, February and March, which feature significantly lower rainfall, averaging only 0 mm.