Marlborough

What is the climate like in Marlborough?

The best time to visit Marlborough is typically August – September, with trip comfort peaking in June (6.8/10). Marlborough is warmest in July, when daily highs average 84°F (29°C), and coolest in January, when lows fall to about 24°F (-4°C). The wettest month is typically December and the driest is November; the year sees roughly 45 in (1142 mm) of precipitation.

• Best time to visitAugust – September — comfort peaks in June (6.8/10)
• Warmest monthJuly — average high 84°F (29°C)
• Coolest monthJanuary — average low 24°F (-4°C)
• Wettest monthDecember (4.7 in (118 mm))
• Driest monthNovember (3.1 in (78 mm))
• Annual precipitation45 in (1142 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromBedford Hanscom Fld, 25 km away (1949-2026)