Dorchester

What is the climate like in Dorchester?

The best time to visit Dorchester is typically July – August, with trip comfort peaking in July (7.2/10). Dorchester is warmest in July, when daily highs average 71°F (21°C), and coolest in January, when lows fall to about 38°F (3°C). The wettest month is typically October and the driest is July; the year sees roughly 34 in (870 mm) of precipitation.

• Best time to visitJuly – August — comfort peaks in July (7.2/10)
• Warmest monthJuly — average high 71°F (21°C)
• Coolest monthJanuary — average low 38°F (3°C)
• Wettest monthOctober (3.9 in (99 mm))
• Driest monthJuly (2.1 in (52 mm))
• Annual precipitation34 in (870 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromSwanage, 35 km away (1959-2026)