July weather forecast
New Haven, CT

Share
The greeny New Haven Green in Connecticut, with the rest of the city and a far away dramatic landscape
The greeny New Haven Green in Connecticut, with the rest of the city and a far away dramatic landscape

Weather in July

July in New Haven marks the peak of summer, providing the highest average temperature of 80.4°F (26.9°C) and enjoying 15.1 hours of daylight. The city basks under the golden summer sun, bringing an air of laziness affecting both the locals and the visitors. It is the ideal time for water-based activities due to the warm sea temperature. Nightfall sees a contrast of cool winds against the backdrop of warming days. July stays true to its summer promise with the aesthetic belly of bonfires and barbecues.

Temperature

July, with its high-temperature average of 80.4°F (26.9°C) and a low-temperature average of 67.6°F (19.8°C), is the warmest month in New Haven, Connecticut.

Humidity

In July, the average relative humidity is 75%.

Rainfall

In New Haven, during July, the rain falls for 18 days and regularly aggregates up to 3.43" (87mm) of precipitation. In New Haven, during the entire year, the rain falls for 167.2 days and collects up to 35.71" (907mm) of precipitation.

Snowfall

In New Haven, snow does not fall in May through October.

Ocean temperature

In New Haven, in July, the average water temperature is 71.1°F (21.7°C).
Note: Most people do not take pleasure in swimming in water at 71.1°F (21.7°C). The difficulty of managing breathing increases as the water temperature dips from 69.8°F (21°C) to 59°F (15°C).

Daylight

In New Haven, the average length of the day in July is 14h and 49min.
On the first day of the month, sunrise is at 5:22 am and sunset at 8:28 pm. On the last day of July, in New Haven, sunrise is at 5:46 am and sunset at 8:09 pm EDT.

Sunshine

The month with the most sunshine is July, with an average of 10.6h of sunshine.

UV index

The months with the highest UV index are June through August, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for the average person.
Note: The maximum UV index of 6 during July translates into these guidelines:
Adhere to precautions and respect sun safety doctrines. Avoiding sunburn is vital. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. Attention! UV radiation is markedly stronger with water and sand reflections.
Updated: Feb 10, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the hottest time of year in New Haven?

The warmest temperatures in New Haven, Connecticut, occur during July, when averages reach a peak of 80.4°F (26.9°C) and a low of 67.6°F (19.8°C).

What are July temperatures in New Haven?

The high-temperature, in July, in New Haven, is 80.4°F (26.9°C), while the low-temperature averages to 67.6°F (19.8°C).

What is the average humidity in July in New Haven?

In July, the average relative humidity in New Haven is 75%.

How many days does it rain in July in New Haven?

In July, in New Haven, Connecticut, the rain falls for 18 days. Throughout July, 3.43" (87mm) of precipitation is accumulated.

When it does not snow in New Haven?

May through October are months without snowfall.

How cold is the water in July in New Haven?

In New Haven, in July, the average water temperature is 71.1°F (21.7°C). Swimming in 71.1°F (21.7°C) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 69.8°F (21°C).

How many hours of daylight does New Haven have in July?

In July, the average day length in New Haven is 14h and 49min.

When are sunrise and sunset in July in New Haven?

On the first day of July in New Haven, Connecticut, sunrise is at 5:22 am and sunset at 8:28 pm. On the last day of the month, sunrise is at 5:46 am and sunset at 8:09 pm EDT.

What month has the most sunshine in New Haven?

With an average of 10.6h of sunshine, July has the most sunshine of the year in New Haven, Connecticut.

How many hours of sunshine does New Haven have in July?

In New Haven, the average sunshine duration in July is 10.6h.

What are the months with the highest UV index in New Haven?

June through August, with an average maximum UV index of 6, are months with the highest UV index in New Haven.

What is the UV index reading in July in New Haven?

The average daily maximum UV index in July is 6. A UV Index value of 6 to 7 symbolizes a high health risk from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in July
New Haven, CT

Average temperature in July - New Haven, CT
  • Average high temperature in July: 80.4°F

The warmest month (with the highest average high temperature) is July (80.4°F).
The month with the lowest average high temperature is January (35.1°F).

  • Average low temperature in July: 67.6°F

The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (25.5°F).

Average pressure in July
New Haven, CT

Average pressure in July - New Haven, CT
  • Average pressure in July: 29.95"Hg

The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in July
New Haven, CT

Average wind speed in July - New Haven, CT
  • Average wind speed in July: 6.8mph

The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).

Average humidity in July
New Haven, CT

Average humidity in July - New Haven, CT
  • Average humidity in July: 75%

The months with the highest relative humidity are February, May and June (76%).
The months with the lowest relative humidity are April and November (72%).

Average rainfall in July
New Haven, CT

Average rainfall in July - New Haven, CT
  • Average rainfall in July: 3.43"

The wettest month (with the highest rainfall) is December (3.86").
The driest month (with the least rainfall) is September (2.24").

Average rainfall days in July
New Haven, CT

Average rainfall days in July - New Haven, CT
  • Average rainfall days in July: 18 days

The month with the highest number of rainy days is July (18 days).
The month with the least rainy days is January (9.4 days).

Average snowfall in July
New Haven, CT

Average snowfall in July - New Haven, CT
  • Average snowfall in July: 0"

The month with the highest snowfall is March (2.8").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in July
New Haven, CT

Average snowfall days in July - New Haven, CT
  • Average snowfall days in July: 0 days

The month with the highest number of snowfall days is February (7.3 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average sea temperature in July
New Haven, CT

Average sea temperature in July - New Haven, CT
  • Average sea temperature in July: 71°F

The best month for swimming (with the highest average sea temperature) is August (73°F).
The coldest month (with the lowest average sea temperature) is February (38.5°F).

Average daylight in July /
Average sunshine in July
New Haven, CT

Average daylight in July / Average sunshine in July - New Haven, CT
  • Average daylight in July: 14h and 5min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in July: 10h and 4min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).

Average sunshine days in July
New Haven, CT

Average sunshine days in July - New Haven, CT
  • Average sunshine days in July: 11.6 days

The month with the most sunshine days is November (17.3 days).
The month with the least sunshine days is August (11.3 days).

Average UV index in July
New Haven, CT

Average UV index in July - New Haven, CT
  • Average UV index in July: 6

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

Average cloud cover in July
New Haven, CT

Average cloud cover in July - New Haven, CT
  • Average cloud cover in July: 31

The months with the most cloud cover are February and December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 29).

Average visibility in July
New Haven, CT

Average visibility in July - New Haven, CT
  • Average visibility in July: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

New Haven, Connecticut, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location