Umatilla

What is the climate like in Umatilla?

The best time to visit Umatilla is typically April – October, with trip comfort peaking in August (9.0/10). Umatilla is warmest in July, when daily highs average 97°F (36°C), and coolest in January, when lows fall to about 30°F (-1°C). The wettest month is typically December and the driest is July; the year sees roughly 11 in (277 mm) of precipitation.

• Best time to visitApril – October — comfort peaks in August (9.0/10)
• Warmest monthJuly — average high 97°F (36°C)
• Coolest monthJanuary — average low 30°F (-1°C)
• Wettest monthDecember (1.6 in (41 mm))
• Driest monthJuly (0.1 in (2 mm))
• Annual precipitation11 in (277 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromHermiston 2 Nw, 7 km away (1999-2026)