Chelmsford

What is the climate like in Chelmsford?

The best time to visit Chelmsford is typically August – September, with trip comfort peaking in June (6.9/10). Chelmsford 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 June; the year sees roughly 44 in (1117 mm) of precipitation.

• Best time to visitAugust – September — comfort peaks in June (6.9/10)
• Warmest monthJuly — average high 84°F (29°C)
• Coolest monthJanuary — average low 24°F (-4°C)
• Wettest monthDecember (4.6 in (118 mm))
• Driest monthJune (3.0 in (77 mm))
• Annual precipitation44 in (1117 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromLowell, 5 km away (1885-2026)