Climate almanac

Monmouth

Oregon, United States · 44.85°, -123.23°

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What is the climate like in Monmouth?

The best time to visit Monmouth is typically June – September, with trip comfort peaking in July (9.3/10). Monmouth is warmest in August, when daily highs average 85°F (30°C), and coolest in February, when lows fall to about 36°F (2°C). The wettest month is typically December and the driest is July; the year sees roughly 50 in (1260 mm) of precipitation.

  • Best time to visitJune – September — comfort peaks in July (9.3/10)
  • Warmest monthAugust — average high 85°F (30°C)
  • Coolest monthFebruary — average low 36°F (2°C)
  • Wettest monthDecember (7.8 in (198 mm))
  • Driest monthJuly (0.2 in (5 mm))
  • Annual precipitation50 in (1260 mm)
  • Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
  • Records fromDallas 2 Ne, 12 km away (1928-2026)