Hillsboro

What is the climate like in Hillsboro?

The best time to visit Hillsboro is typically June – January, with trip comfort peaking in September (7.8/10). Hillsboro is warmest in August, when daily highs average 97°F (36°C), and coolest in January, when lows fall to about 40°F (4°C). The wettest month is typically May and the driest is July; the year sees roughly 39 in (980 mm) of precipitation.

• Best time to visitJune – January — comfort peaks in September (7.8/10)
• Warmest monthAugust — average high 97°F (36°C)
• Coolest monthJanuary — average low 40°F (4°C)
• Wettest monthMay (6.3 in (159 mm))
• Driest monthJuly (2.1 in (54 mm))
• Annual precipitation39 in (980 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromHillsboro, 2 km away (1903-2026)