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Connecticut Weather in August

Average temperatures, rainfall, sunshine and the best places to visit in Connecticut, the United States of America in August.

Planning a journey to Connecticut, the United States of America this August and curious over the weather conditions to await? Your essential details are found on this page, answering your query:

What to Expect in Connecticut in August

Connecticut, the United States of America is a region in the United States of America. August in Connecticut generally has warm temperatures, with precipitation levels ranging from moderate to high. August is a summer month.

Temperatures

The average maximum temperatures are warm and range from 26°C (79°F) in Cornwall Bridge to 29°C (84°F) in Windsor Locks. Nighttime temperatures generally drop to 17°C (63°F) in Windsor Locks and 15°C (59°F) in Cornwall Bridge.

For specific regional insights in Connecticut, the United States of America, refer to the map provided below.

Precipitation

In August, precipitation varies across different areas. From moderate rainfall in Mystic with an average of 89 mm (3.5 in) to high rainfall in Torrington with 144 mm (5.7 in). In Mystic, this particular month consistently records the lowest levels of rainfall, making it the driest period throughout the entire year.

Average sunshine

Many locations offer abundant sunshine during this month. For instance, Mystic enjoys approximately 260 hours of sunlight, ideal for those seeking sunny weather.

Explore Connecticut by month

Pick a month to see the average temperature, rainfall and sunshine in Connecticut — and find the best time to visit. (based on Mystic)

Best Places to Visit in Connecticut in August

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Connecticut.

perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

Popular Destinations in Connecticut

What is the weather like in August for some of the most popular destinations in Connecticut, the United States of America?

Temperature range in Connecticut (August)

Precipitation variation in Connecticut (August)

Mystic

In August Mystic generally has high temperatures with maximum daytime temperatures around 26°C (79°F), minimum nighttime temperatures around 18°C (64°F) and moderate monthly rainfall. So on average the conditions are perfect that month.

July
August
September
Max temperature
27°C (81°F)
26°C (79°F)
23°C (73°F)
Min temperature
19°C (66°F)
18°C (64°F)
14°C (57°F)
Monthly sun hours
290 hours
260 hours
233 hours
Monthly rainfall
101 mm (4 in)
89 mm (3.5 in)
98 mm (3.9 in)
Monthly rainy days
11 days
9 days
9 days
Weather conditions

Danbury

In August Danbury generally has high temperatures with maximum daytime temperatures around 27°C (81°F), minimum nighttime temperatures around 16°C (61°F) and high monthly rainfall. So on average the conditions are pleasant that month.

July
August
September
Max temperature
28°C (82°F)
27°C (81°F)
24°C (75°F)
Min temperature
17°C (63°F)
16°C (61°F)
12°C (54°F)
Monthly rainfall
121 mm (4.8 in)
133 mm (5.2 in)
101 mm (4 in)
Monthly rainy days
13 days
12 days
10 days
Weather conditions

Windsor Locks

In August Windsor Locks generally has high temperatures with maximum daytime temperatures around 29°C (84°F), minimum nighttime temperatures around 17°C (63°F) and high monthly rainfall. So on average the conditions are pleasant that month.

July
August
September
Max temperature
30°C (86°F)
29°C (84°F)
25°C (77°F)
Min temperature
18°C (64°F)
17°C (63°F)
13°C (55°F)
Monthly sun hours
293 hours
269 hours
223 hours
Monthly rainfall
112 mm (4.4 in)
127 mm (5 in)
103 mm (4.1 in)
Monthly rainy days
13 days
11 days
9 days
Weather conditions

Groton

In August Groton generally has high temperatures with maximum daytime temperatures around 26°C (79°F), minimum nighttime temperatures around 18°C (64°F) and moderate monthly rainfall. So on average the conditions are perfect that month.

July
August
September
Max temperature
27°C (81°F)
26°C (79°F)
23°C (73°F)
Min temperature
19°C (66°F)
18°C (64°F)
14°C (57°F)
Monthly sun hours
293 hours
269 hours
223 hours
Monthly rainfall
98 mm (3.9 in)
96 mm (3.8 in)
104 mm (4.1 in)
Monthly rainy days
11 days
10 days
10 days
Weather conditions

Milford

In August Milford generally has high temperatures with maximum daytime temperatures around 28°C (82°F), minimum nighttime temperatures around 19°C (66°F) and high monthly rainfall. So on average the conditions are pleasant that month.

July
August
September
Max temperature
29°C (84°F)
28°C (82°F)
25°C (77°F)
Min temperature
20°C (68°F)
19°C (66°F)
15°C (59°F)
Monthly sun hours
293 hours
269 hours
223 hours
Monthly rainfall
94 mm (3.7 in)
116 mm (4.6 in)
92 mm (3.6 in)
Monthly rainy days
11 days
11 days
10 days
Weather conditions

Is your destination not in the list? Have a look at all destinations in Connecticut, in the United States of America.

Popular cities in August

Day & night temperatures, rainfall and average weather in Connecticut in August.

City Weather Day temp Night temp Rainfall
Mystic 26°C (79°F) 18°C (64°F) 89 mm (3.5 in)
Danbury 27°C (81°F) 16°C (61°F) 133 mm (5.2 in)
Windsor Locks 29°C (84°F) 17°C (63°F) 127 mm (5 in)
Groton 26°C (79°F) 18°C (64°F) 96 mm (3.8 in)
Milford 28°C (82°F) 19°C (66°F) 116 mm (4.6 in)
Norwalk 28°C (82°F) 18°C (64°F) 106 mm (4.2 in)

Connecticut weather in August: frequently asked questions

What is the weather like in Connecticut, the United States of America in August?

August in Connecticut, the United States of America brings perfect weather. In Mystic, daytime temperatures are typically around 26°C (79°F) and nighttime lows hover near 18°C (64°F).

What is the average temperature in Connecticut, the United States of America in August?

Average temperatures in Connecticut, the United States of America during August range from a nighttime low near 18°C (64°F) to a daytime high around 26°C (79°F) in Mystic.

Does Connecticut, the United States of America get a lot of rain in August?

Rain is generally moderate to light in Connecticut, the United States of America during August, with Mystic averaging close to 89 mm (3.5 in).

Is August a Good Time to Visit Connecticut, the United States of America?

We consider August to be one of the best times to travel to Connecticut, the United States of America. Typically, the climate in Mystic is perfect. However, the weather conditions may vary depending on your destination.

Generally speaking, the best visiting conditions can be found in August and September offering mostly perfect weather in Mystic. In contrast, January, February, March and December tend to have poor weather conditions.

Interested in more climate information?

We have much more information about the climate in Connecticut.

Weather and climate has detailed information for every country in the world. Are you going to the United States of America? Get detailed historical weather averages for many cities in the United States of America.

Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.

Bucket list

Need travel inspiration? Check out our bucket list articles and be inspired.