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 perfect 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.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Waltham's climate page.
Waltham Temperature in May
Min Temperature
9°C (48°F)
Max Temperature
21°C (70°F)
Water Temperature
9°C (48°F) *
Chance of Rain
46%
Precipitation
90 mm (3.5 in)
Rainy days
14 days
Humidity
67% *
Windspeed
6 m/s (12 knots) *
Sunshine
301 hours *
Percentage Sunshine
59% *
Best Places in the United States of America in May
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in May →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Waltham in May
Pleasant temperatures in May mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Prepare for significant rainfall with proper waterproof clothing and shoes. The water temperature sits at about 9°C (48°F), which is too chilly for most people to enjoy swimming. Leave the swimsuit at home unless you love cold water. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.What To Do in Waltham in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Waltham's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Waltham climate overview or explore weather in the United States of America.
