Waltham Weather in August

August in Waltham brings high temperatures, with daytime highs of 28°C (82°F) and nights around 16°C (61°F). Quite a bit of rainfall is expected, around 98 mm (3.9 in), so pack an umbrella.

Rainfall in Waltham in August

Rain is expected on roughly 11 days, totalling around 98 mm (3.9 in) for the month. When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.

Temperature in Waltham in August

Waltham has perfect weather in August, with days reaching 28°C (82°F) and nights cooling to 16°C (61°F). August is typically considered a summer month. The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. Nights cool down to 16°C (61°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.

Sunshine in Waltham in August

Expect sunny days throughout the month, with an estimated 280 hours of sunshine. This makes it a pleasant time to visit Waltham.

Wind Speed in Waltham in August

August has wind speeds averaging 5 m/s (10 knots). You can expect gentle to moderate winds that move small trees and make flags wave steadily on typical days. Conditions typically range from light breezes to moderate winds.

Average water temperature in August

At 20°C (68°F), the water is pleasant for swimming. Most people find this range ideal — cool enough to be refreshing, warm enough to stay in comfortably.

If you're inclined towards comfortable temperatures and drier conditions, August is a good time to visit Waltham.

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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 August

Min Temperature 16°C (61°F)  

Max Temperature 28°C (82°F)  

Water Temperature 20°C (68°F) *  

Chance of Rain 37%  

Precipitation 98 mm (3.9 in)  

Rainy days 11 days  

Humidity 72% *  

Windspeed 5 m/s (10 knots) *  

Sunshine 280 hours *  

Percentage Sunshine 64% *  

* Data from: Boston, the United States of America (16 KM, 10 Miles).

What to Wear in Waltham in August

Warm but pleasant conditions in Waltham in August. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. Expect heavy rainfall, so bring good rain protection and waterproof bags. The water temperature sits at about 20°C (68°F), making it perfect for swimming and water activities. Don't forget to pack your favorite swimwear and perhaps some snorkel gear. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.

What To Do in Waltham in August

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

9/10

Cycling

7/10

Walking

7/10

Camping

8/10

Outdoor sports

7/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

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.

More climate data for Waltham

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

See the full Waltham climate overview or explore weather in the United States of America.