In terms of precipitation, rainfall in Walla Walla ranges from 12.0 - 58.0 mm per month. December is typically the wettest month, when rainfall can reach 58.0 mm. July is typically the driest time to visit Walla Walla when rainfall is around 12.0 mm.
If weather is an important factor for your trip to Walla Walla, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 24.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 1.0 C).
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