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Connecticut Weather in July

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

Planning a getaway to Connecticut, the United States of America this July and curious about the weather you should prepare for? Discover all the vital details you need on this page, solving your puzzle:

What to Expect in Connecticut in July

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

Temperatures

The average maximum temperatures are warm and range from 27°C (81°F) in Mystic to 30°C (86°F) in Windsor Locks. Nighttime temperatures generally drop to 18°C (64°F) in Windsor Locks and 19°C (66°F) in Mystic. On average, July is the warmest month of the year in Connecticut, the United States of America. So be prepared and pack summer clothes.

To learn more about the conditions in specific areas of Connecticut, the United States of America, check out the map below.

Precipitation

In July, precipitation varies across different areas. From moderate rainfall in Bridgeport with an average of 87 mm (3.4 in) to high rainfall in Cornwall Bridge with 122 mm (4.8 in).

Average sunshine

Many locations offer abundant sunshine during this month. For instance, Mystic enjoys approximately 290 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 July

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 July for some of the most popular destinations in Connecticut, the United States of America?

Temperature range in Connecticut (July)

Precipitation variation in Connecticut (July)

Mystic

In July Mystic generally has high temperatures with maximum daytime temperatures around 27°C (81°F), minimum nighttime temperatures around 19°C (66°F) and high monthly rainfall. So on average the conditions are pleasant that month.

June
July
August
Max temperature
23°C (73°F)
27°C (81°F)
26°C (79°F)
Min temperature
15°C (59°F)
19°C (66°F)
18°C (64°F)
Monthly sun hours
276 hours
290 hours
260 hours
Monthly rainfall
111 mm (4.4 in)
101 mm (4 in)
89 mm (3.5 in)
Monthly rainy days
13 days
11 days
9 days
Weather conditions

Danbury

In July Danbury generally has high temperatures with maximum daytime temperatures around 28°C (82°F), minimum nighttime temperatures around 17°C (63°F) and high monthly rainfall. So on average the conditions are pleasant that month.

June
July
August
Max temperature
25°C (77°F)
28°C (82°F)
27°C (81°F)
Min temperature
14°C (57°F)
17°C (63°F)
16°C (61°F)
Monthly rainfall
136 mm (5.4 in)
121 mm (4.8 in)
133 mm (5.2 in)
Monthly rainy days
15 days
13 days
12 days
Weather conditions

Windsor Locks

In July Windsor Locks generally has high temperatures with maximum daytime temperatures around 30°C (86°F), minimum nighttime temperatures around 18°C (64°F) and high monthly rainfall. So on average the conditions are tolerable that month.

June
July
August
Max temperature
26°C (79°F)
30°C (86°F)
29°C (84°F)
Min temperature
15°C (59°F)
18°C (64°F)
17°C (63°F)
Monthly sun hours
273 hours
293 hours
269 hours
Monthly rainfall
156 mm (6.1 in)
112 mm (4.4 in)
127 mm (5 in)
Monthly rainy days
16 days
13 days
11 days
Weather conditions

Groton

In July Groton generally has high temperatures with maximum daytime temperatures around 27°C (81°F), minimum nighttime temperatures around 19°C (66°F) and moderate monthly rainfall. So on average the conditions are perfect that month.

June
July
August
Max temperature
24°C (75°F)
27°C (81°F)
26°C (79°F)
Min temperature
15°C (59°F)
19°C (66°F)
18°C (64°F)
Monthly sun hours
273 hours
293 hours
269 hours
Monthly rainfall
113 mm (4.4 in)
98 mm (3.9 in)
96 mm (3.8 in)
Monthly rainy days
13 days
11 days
10 days
Weather conditions

Milford

In July Milford generally has high temperatures with maximum daytime temperatures around 29°C (84°F), minimum nighttime temperatures around 20°C (68°F) and moderate monthly rainfall. So on average the conditions are perfect that month.

June
July
August
Max temperature
25°C (77°F)
29°C (84°F)
28°C (82°F)
Min temperature
16°C (61°F)
20°C (68°F)
19°C (66°F)
Monthly sun hours
273 hours
293 hours
269 hours
Monthly rainfall
130 mm (5.1 in)
94 mm (3.7 in)
116 mm (4.6 in)
Monthly rainy days
13 days
11 days
11 days
Weather conditions

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

In our records: the United States of America July extremes

Notable July records observed across cities in the United States of America in our climate database (1976 – 2026). Historic readings can vary in quality, so treat these as illustrative.

  • In our records, the warmest July day in the United States of America reached 51°C (124°F) in Palm Desert on July 28, 1995.

Popular cities in July

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

City Weather Day temp Night temp Rainfall
Mystic 27°C (81°F) 19°C (66°F) 101 mm (4 in)
Danbury 28°C (82°F) 17°C (63°F) 121 mm (4.8 in)
Windsor Locks 30°C (86°F) 18°C (64°F) 112 mm (4.4 in)
Groton 27°C (81°F) 19°C (66°F) 98 mm (3.9 in)
Milford 29°C (84°F) 20°C (68°F) 94 mm (3.7 in)
Norwalk 30°C (86°F) 19°C (66°F) 94 mm (3.7 in)

Connecticut weather in July: frequently asked questions

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

Connecticut, the United States of America typically experiences pleasant weather in July, part of the summer season. Daytime highs in Mystic average around 27°C (81°F), and temperatures drop to about 19°C (66°F) at night.

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

Mystic averages a daytime maximum of 27°C (81°F) in July, with overnight lows close to 19°C (66°F).

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

Connecticut, the United States of America sees substantial rainfall in July. Mystic typically averages about 101 mm (4 in), a mix of wet and dry days, but bring an umbrella.

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

In our opinion, July is a good time to visit Connecticut, the United States of America with overall pleasant weather in Mystic.

Generally speaking, August and September provide perfect weather in Mystic. On the other hand, the weather in January, February, March and December tend to be poor.

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.