Groton Weather in August

August in Groton brings high temperatures, with highs of 26°C (79°F) and nights dropping to 18°C (64°F). Rainfall is on the higher side this month, averaging around 96 mm (3.8 in), so keep a rain jacket handy.

Rainfall in Groton in August

Historically, approximately 10 days this month are expected to have rain, averaging 96 mm (3.8 in). 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 Groton in August

August is a perfect month in Groton, with 26°C (79°F) during the day and 18°C (64°F) at night. Summer occurs in August. This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. Nights cool down to 18°C (64°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 Groton in August

With approximately 269 hours of sunshine, the days are filled with clear skies. It makes it a perfect month for being outside.

So this is a great month to visit if you prefer dry days with pleasant temperatures.

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• January
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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 Groton's climate page.

Groton Temperature in August

Min Temperature 18°C (64°F)  

Max Temperature 26°C (79°F)  

Chance of Rain 33%  

Precipitation 96 mm (3.8 in)  

Rainy days 10 days  

Humidity 70% *  

Sunshine 269 hours *  

Percentage Sunshine 63% *  

* Data from: Hartford, the United States of America (68 KM, 42 Miles).

What to Wear in Groton in August

Warm weather calls for comfortable, breathable clothing in August. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). High rain levels are expected, so pack waterproof gear and an umbrella or poncho. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.

What To Do in Groton 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 Groton's climate page.

More climate data for Groton

Temperature Rainfall Sunshine Humidity

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