Prosser

What is the climate like in Prosser?

The best time to visit Prosser is typically April – October, with trip comfort peaking in July (8.9/10). Prosser is warmest in July, when daily highs average 97°F (36°C), and coolest in January, when lows fall to about 29°F (-2°C). The wettest month is typically January and the driest is July; the year sees roughly 10 in (262 mm) of precipitation.

• Best time to visitApril – October — comfort peaks in July (8.9/10)
• Warmest monthJuly — average high 97°F (36°C)
• Coolest monthJanuary — average low 29°F (-2°C)
• Wettest monthJanuary (1.8 in (45 mm))
• Driest monthJuly (0.1 in (2 mm))
• Annual precipitation10 in (262 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromProsser, 1 km away (1925-2026)