Waltham Weather in May

Waltham in May averages 21°C (70°F) during the day and 9°C (48°F) at night. Keep in mind that quite a bit of rainfall is expected this month.

Rainfall in Waltham in May

Historically, May sees about 14 days of rain, with a monthly average of 90 mm (3.5 in). Neither particularly heavy nor particularly frequent, the rain this month is about average. A light jacket should be enough on most wet days.

Temperature in Waltham in May

May is a excellent month in Waltham, with 21°C (70°F) during the day and 9°C (48°F) at night. Temperatures can feel cooler in the morning and evening, so layering is often the best approach. Nights fall to 9°C (48°F), which is cold enough to feel it indoors too. A good thick duvet makes all the difference for a comfortable night's sleep.

Sunshine in Waltham in May

Expect sunny days throughout the month, with an estimated 301 hours of sunshine. This makes it a pleasant time to visit Waltham.

Wind Speed in Waltham in May

May sees wind speeds averaging 6 m/s (12 knots). You'll experience strong winds that cause whole trees to sway and require effort when walking against them. As an average, expect variation from moderate breezes to particularly windy days that affect daily routines.

Average water temperature in May

At 9°C (48°F), the water is very cold. Most people find it too uncomfortable for anything beyond a brief wade.

If you're a fan of comfortable temperatures and drier conditions, May is a great time to visit.