July weather forecast and climate
Darien, CT

Weather in July

July, like June, in Darien, Connecticut, is another warm summer month, with temperature in the range of an average low of 68.9°F (20.5°C) and an average high of 81.3°F (27.4°C).

Temperature

July is the warmest month, with an average high-temperature of 81.3°F (27.4°C) and an average low-temperature of 68.9°F (20.5°C).

Heat index

In July, the average heat index is calculated to 86°F (30°C). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Note that heat index values are valued for light wind and location in the shade. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'feels like', 'felt air temperature', or 'real feel', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. Additional factors like activity, differences in body mass, height, and shape, pregnancy, and metabolic differences affect individual temperature impact. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

The average relative humidity in Darien is 74%.

Rainfall

The wettest months in Darien are July and December, with an average 4.17" (106mm) of rainfall.

Snowfall

May through October are months without snowfall.

Daylight

In July, the average length of the day in Darien, Connecticut, is 14.8h.

Sunshine

With an average of 10.4h of sunshine, July has the most sunshine of the year.

UV index

Months with the highest UV index in Darien are June through August, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health risk from unprotected exposure to the Sun's UV rays for average individuals.
Note: The daily maximum UV index of 6 in July interpret into the following advice:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the warmest month in Darien?

With an average high-temperature of 81.3°F (27.4°C) and an average low-temperature of 68.9°F (20.5°C), July is the warmest month in Darien, Connecticut.

What is the temperature in July in Darien?

In July, the average high-temperature is 81.3°F (27.4°C), and the average low-temperature is 68.9°F (20.5°C). The average heat index (a.k.a. 'felt air temperature', 'feels like'), that combines both air temperature and relative humidity, in July is appraised at 86°F (30°C).

What is the average humidity in July in Darien?

The average relative humidity in July in Darien, Connecticut, is 74%.

How much does it rain in Darien in July?

In Darien, in July, it is raining for 17 days, with typically 4.17" (106mm) of accumulated precipitation.

What is the rainiest month in Darien?

Months with the most rainfall in Darien are July and December, with an average 4.17" (106mm) of precipitation.

When it does not snow in Darien?

May through October are months without snowfall in Darien.

How many hours of daylight does Darien have in July?

In July, the average length of the day in Darien is 14.8h.

What month has the most sunshine in Darien?

The month with the most sunshine is July, with an average of 10.4h of sunshine.

How many hours of sunshine does Darien have in July?

In July, the average sunshine in Darien is 10.4h.

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

Months with the highest UV index in Darien, Connecticut, are June through August, with an average maximum UV index of 6.

What is the UV index reading in July in Darien?

In July, the average daily maximum UV index in Darien is 6. A UV Index estimate of 6 to 7 represents a high health threat from unprotected exposure to the UV radiation.

Average temperature in July
Darien, CT

Average temperature in July - Darien, CT
  • Average high temperature in July: 81.3°F

The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (36.1°F).

  • Average low temperature in July: 68.9°F

The month with the highest average low temperature is July (68.9°F).
The coldest month (with the lowest average low temperature) is January (26.4°F).

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Average pressure in July
Darien, CT

Average pressure in July - Darien, CT
  • Average pressure in July: 29.96"

The month with the highest atmospheric pressure is November (30.1").
The month with the lowest atmospheric pressure is June (29.93").

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Average wind speed in July
Darien, CT

Average wind speed in July - Darien, CT
  • Average wind speed in July: 6.6mph

The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).

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Average humidity in July
Darien, CT

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

The month with the highest relative humidity is May (76%).
Months with the lowest relative humidity are April, August and November (72%).

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Average rainfall in July
Darien, CT

Average rainfall in July - Darien, CT
  • Average rainfall in July: 4.17"

The wettest months (with the highest rainfall) are July and December (4.17").
The driest month (with the least rainfall) is January (2.48").

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Average rainfall days in July
Darien, CT

Average rainfall days in July - Darien, CT
  • Average rainfall days in July: 17 days

The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (8.8 days).

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Average snowfall in July
Darien, CT

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

The month with the highest snowfall is February (2.64").
Months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in July
Darien, CT

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

The month with the highest number of snowfall days is February (7.8 days).
Months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in July / Average sunshine in July - Darien, CT
  • Average daylight in July: 14.8h

The month with the longest days is June (Average daylight: 15.1h).
The month with the shortest days is December (Average daylight: 9.3h).

  • Average sunshine in July: 10.4h

The month with the most sunshine is July (Average sunshine: 10.4h).
The month with the least sunshine is February (Average sunshine: 4.6h).

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Average sunshine days in July
Darien, CT

Average sunshine days in July - Darien, CT
  • Average sunshine days in July: 11.9 days

The month with the most sunshine days is November (17.3 days).
The month with the least sunshine days is June (10.8 days).

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Average UV index in July
Darien, CT

Average UV index in July - Darien, CT
  • Average UV index in July: 6

Months with the highest UV index are June, July and August (UV index 6).
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
Darien, CT

Average cloud cover in July - Darien, CT
  • Average cloud cover in July: 32

The month with the most cloud cover is December (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 31).

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Average visibility in July
Darien, CT

Average visibility in July - Darien, CT
  • Average visibility in July: 6mi

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

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