Groton Weather in May

Groton in May sees pleasant daytime temperatures of 19°C (66°F) and nighttime lows of 10°C (50°F). Rainfall is fairly high this month at around 95 mm (3.7 in), so pack a rain jacket to stay dry.

Rainfall in Groton in May

Typically, you can expect about 13 days of rain this month, with 95 mm (3.7 in) on average. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.

Temperature in Groton in May

May in Groton brings typical temperatures with highs around 19°C (66°F) and lows of 10°C (50°F). A light jacket or extra layer can be useful, especially outside the warmest hours of the day. Nights drop to 10°C (50°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet.

Sunshine in Groton in May

With approximately 258 hours of sunshine, the days are filled with clear skies. It makes it a perfect month for being outside.

For Groton itself, July and August generally stand out with the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.