Groton

What is the climate like in Groton?

The best time to visit Groton is typically June, the year's most comfortable month (6.7/10). Groton is warmest in August, when daily highs average 75°F (24°C), and coolest in January, when lows fall to about 31°F (0°C). The wettest month is typically December and the driest is June; the year sees roughly 51 in (1290 mm) of precipitation.

• Best time to visitJune — the year's comfort peak (6.7/10)
• Warmest monthAugust — average high 75°F (24°C)
• Coolest monthJanuary — average low 31°F (0°C)
• Wettest monthDecember (5.6 in (142 mm))
• Driest monthJune (2.9 in (73 mm))
• Annual precipitation51 in (1290 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromGroton, 3 km away (1957-2024)