August in Pasco averages a daily high of 32.6°C with nights around 16.7°C. Rain is rare — about 1.9 wet days and 3.1mm across the month. Generally workable, with some weather to plan around.
Across the year, the best time to visit Pasco is May–June.
Based on KENNEWICK, WA US (3.2km), 1995–2024. 30 years of August data.