Lewiston

What is the climate like in Lewiston?

The best time to visit Lewiston is typically August – September, with trip comfort peaking in September (6.8/10). Lewiston is warmest in July, when daily highs average 80°F (26°C), and coolest in January, when lows fall to about 18°F (-8°C). The wettest month is typically December and the driest is September; the year sees roughly 44 in (1114 mm) of precipitation.

• Best time to visitAugust – September — comfort peaks in September (6.8/10)
• Warmest monthJuly — average high 80°F (26°C)
• Coolest monthJanuary — average low 18°F (-8°C)
• Wettest monthDecember (4.9 in (125 mm))
• Driest monthSeptember (2.8 in (72 mm))
• Annual precipitation44 in (1114 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromDurham, 15 km away (1994-2026)