July weather forecast
Norwalk, CT

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The tourist attraction spot of a stone house home to the Sheffield Island lighthouse in Norwalk, Connecticut
The tourist attraction spot of a stone house home to the Sheffield Island lighthouse in Norwalk, Connecticut

Weather in July

July is the warmest month in Norwalk, showcasing typical summer weather and high sun exposures. Temperatures rise significantly from June, topping at 81.1°F (27.3°C) for high temperatures, and 68.2°F (20.1°C) for low temperatures. Evenings are comfortably warm, encouraging night outdoor activities and beach outings. The town buzzes with summer camps, outdoor concerts, and Independence Day celebrations exhibiting full summer excitement in Norwalk.

Temperature

The highest temperatures in Norwalk are recorded in July, with averages reaching a high of 81.1°F (27.3°C) and a low of 68.2°F (20.1°C).

Heat index

The heat index in July is estimated at a hot 86°F (30°C). If one continues to be active during enduring exposure, it could result in fatigue and heat cramps.
Heat index readings emphasize conditions of light breezes and shaded spots. Direct sunlight might lead to a heat index increase by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. Elements such as metabolic variations, pregnancy, and physical exertion can influence one's weather perception. Consider the sun's direct rays and their impact; they can potentially increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Young ones often do not realize the necessity to rest and replenish their fluids. Thirst is a delayed indication of dehydration - keeping hydrated, particularly in prolonged physical activity, is crucial.

Humidity

In Norwalk, Connecticut, the average relative humidity in July is 74%.

Rainfall

July is the month with the most rainfall. Rain falls for 18.1 days and accumulates 4.13" (105mm) of precipitation.

Snowfall

In Norwalk, Connecticut, snow does not fall in May through October.

Ocean temperature

In Norwalk, the average seawater temperature in July is 70.9°F (21.6°C).
Note: Most people find swimming in 70.9°F (21.6°C) unenjoyable. As the water temperature falls from 69.8°F (21°C) to 59°F (15°C), controlling one's breathing becomes harder.

Daylight

The average length of the day in July is 14h and 47min.
On the first day of the month, sunrise is at 5:25 am and sunset at 8:30 pm. On the last day of July, sunrise is at 5:49 am and sunset at 8:10 pm EDT.

Sunshine

With an average of 10.5h of sunshine, July has the most sunshine of the year.

UV index

The months with the highest UV index are June through August, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for average individuals.
Note: The UV index of 6 during July leads to these advisories:
Conform to measures and uphold sun safety traditions. Warding off skin and eye harm is necessary. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.
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Frequently asked questions

What is the warmest month in Norwalk?

July is the warmest month in Norwalk, with an average high-temperature of 81.1°F (27.3°C) and an average low-temperature of 68.2°F (20.1°C).

What are the temperatures in Norwalk in July?

The average high-temperature, in July, in Norwalk, is 81.1°F (27.3°C), while the average low-temperature is 68.2°F (20.1°C). The average heat index (a.k.a. 'feels like', 'apparent temperature'), which combines air temperature and relative humidity, in July is estimated at 86°F (30°C).

What is the average humidity in July in Norwalk?

In July, the average relative humidity in Norwalk is 74%.

What is the wettest month in Norwalk?

The month with the most rainfall in Norwalk, Connecticut, is July, when the rain falls for 18.1 days and typically aggregates up to 4.13" (105mm) of precipitation.

How much does it rain in Norwalk in July?

In Norwalk, Connecticut, in July, it is raining for 18.1 days, with typically 4.13" (105mm) of accumulated precipitation.

When it does not snow in Norwalk?

May through October are months without snowfall.

What is the ocean temperature in July in Norwalk?

In July, the average ocean temperature in Norwalk is 70.9°F (21.6°C). For swimming, a surface water temperature of 70.9°F (21.6°C) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 69.8°F (21°C).

How many hours of daylight does Norwalk have in July?

The average day length in July is 14h and 47min.

When are sunrise and sunset in July in Norwalk?

On the first day of July, sunrise is at 5:25 am and sunset at 8:30 pm. On the last day of the month, sunrise is at 5:49 am and sunset at 8:10 pm EDT.

What month has the most sunshine in Norwalk?

With an average of 10.5h of sunshine, July has the most sunshine of the year in Norwalk, Connecticut.

How long on average sun shines in July in Norwalk?

In July, the average sunshine duration in Norwalk is 10.5h.

What is the month with the highest UV index in Norwalk?

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

What is the UV index intensity in July in Norwalk?

The average daily maximum UV index in July in Norwalk is 6. A UV Index reading of 6 to 7 represents a high health threat 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
Norwalk, CT

Average temperature in July - Norwalk, CT
  • Average high temperature in July: 81.1°F

The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (35.8°F).

  • Average low temperature in July: 68.2°F

The month with the highest average low temperature is July (68.2°F).
The coldest month (with the lowest average low temperature) is January (26.4°F).

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Average pressure in July
Norwalk, CT

Average pressure in July - Norwalk, CT
  • Average pressure in July: 29.96"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).

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Average wind speed in July
Norwalk, CT

Average wind speed in July - Norwalk, CT
  • Average wind speed in July: 6.5mph

The windiest month (with the highest average wind speed) is January (10.1mph).
The calmest month (with the lowest average wind speed) is July (6.5mph).

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Average humidity in July
Norwalk, CT

Average humidity in July - Norwalk, CT
  • Average humidity in July: 74%

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%).

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Average rainfall in July
Norwalk, CT

Average rainfall in July - Norwalk, CT
  • Average rainfall in July: 4.13"

The wettest month (with the highest rainfall) is July (4.13").
The driest months (with the least rainfall) are January and February (2.36").

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Average rainfall days in July
Norwalk, CT

Average rainfall days in July - Norwalk, CT
  • Average rainfall days in July: 18.1 days

The month with the highest number of rainy days is July (18.1 days).
The month with the least rainy days is January (8.3 days).

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Average snowfall in July
Norwalk, CT

Average snowfall in July - Norwalk, CT
  • Average snowfall in July: 0"

The month with the highest snowfall is February (2.83").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in July
Norwalk, CT

Average snowfall days in July - Norwalk, CT
  • Average snowfall days in July: 0 days

The month with the highest number of snowfall days is February (7.4 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average sea temperature in July
Norwalk, CT

Average sea temperature in July - Norwalk, CT
  • Average sea temperature in July: 70.9°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 (39°F).

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Average daylight in July /
Average sunshine in July
Norwalk, CT

Average daylight in July / Average sunshine in July - Norwalk, 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 3min

The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).

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Average sunshine days in July
Norwalk, CT

Average sunshine days in July - Norwalk, CT
  • Average sunshine days in July: 11.3 days

The month with the most sunshine days is January (17.8 days).
The month with the least sunshine days is June (10 days).

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Average UV index in July
Norwalk, CT

Average UV index in July - Norwalk, 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).

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Average cloud cover in July
Norwalk, CT

Average cloud cover in July - Norwalk, CT
  • Average cloud cover in July: 31

The months with the most cloud cover are February, March and December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 30).

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Average visibility in July
Norwalk, CT

Average visibility in July - Norwalk, 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).

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Norwalk, Connecticut, USA

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