July weather forecast
Old Lyme, CT

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Weather in July

July is a moderately hot summer month in Old Lyme, Connecticut, with temperature in the range of an average low of 66.4°F (19.1°C) and an average high of 79.5°F (26.4°C).

Temperature

Old Lyme experiences its highest average temperatures in July, reaching a peak of 79.5°F (26.4°C) and a minimum of 66.4°F (19.1°C).

Humidity

The months with the highest humidity are June and July, with an average relative humidity of 79%.

Rainfall

In Old Lyme, in July, it is raining for 11.5 days, with typically 0.83" (21mm) of accumulated precipitation. In Old Lyme, during the entire year, the rain falls for 110.7 days and collects up to 8.58" (218mm) of precipitation.

Snowfall

April through October are months without snowfall in Old Lyme.

Daylight

In Old Lyme, the average length of the day in July is 14h and 49min.
On the first day of July, sunrise is at 5:20 am and sunset at 8:26 pm. On the last day of the month, sunrise is at 5:44 am and sunset at 8:07 pm EDT.

Sunshine

The months with the most sunshine in Old Lyme are July and August, with an average of 10.6h of sunshine.

UV index

June through August, with an average maximum UV index of 6, are months with the highest UV index in Old Lyme. A UV Index of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The maximum UV index, 6 during July, leads to the following recommendations:
Prevent overexposure. Protection from the sun's harmful effects is needed. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
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Frequently asked questions

What is the warmest month in Old Lyme?

Temperature readings reach their annual highs in July, averaging 79.5°F (26.4°C) and a minimum average of 66.4°F (19.1°C).

What are July temperatures in Old Lyme?

July temperatures vary between a high-temperature of 79.5°F (26.4°C) and a low-temperature of 66.4°F (19.1°C).

What are the most humid months in Old Lyme?

The months with the highest humidity in Old Lyme are June and July, with an average relative humidity of 79%.

What is the average humidity in July in Old Lyme?

The average relative humidity in July in Old Lyme is 79%.

How many days does it rain in July in Old Lyme?

In Old Lyme, Connecticut, in July, it is raining for 11.5 days, with typically 0.83" (21mm) of accumulated precipitation.

When it does not snow in Old Lyme?

In Old Lyme, snow does not fall in April through October.

What is the average length of the day in July in Old Lyme?

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

When are sunrise and sunset in July in Old Lyme?

On the first day of July in Old Lyme, Connecticut, sunrise is at 5:20 am and sunset at 8:26 pm. On the last day of the month, sunrise is at 5:44 am and sunset at 8:07 pm EDT.

What is the month with the most sunshine in Old Lyme?

The months with the most sunshine are July and August, with an average of 10.6h of sunshine.

How many hours of sunshine does Old Lyme have in July?

In Old Lyme, Connecticut, the average sunshine duration in July is 10.6h.

What is the month with the highest UV index in Old Lyme?

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

What is the UV index reading in July in Old Lyme?

The average daily maximum UV index in July is 6. A UV Index value of 6 to 7 symbolizes a high health threat from unsafe exposure to Sun's UV rays.
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
Old Lyme, CT

Average temperature in July - Old Lyme, CT
  • Average high temperature in July: 79.5°F

The warmest month (with the highest average high temperature) is July (79.5°F).
The month with the lowest average high temperature is January (35.4°F).

  • Average low temperature in July: 66.4°F

The month with the highest average low temperature is July (66.4°F).
The coldest month (with the lowest average low temperature) is January (25.7°F).

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Average pressure in July
Old Lyme, CT

Average pressure in July - Old Lyme, CT
  • Average pressure in July: 29.95"Hg

The month with the highest atmospheric pressure is November (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in July
Old Lyme, CT

Average wind speed in July - Old Lyme, CT
  • Average wind speed in July: 7.2mph

The windiest month (with the highest average wind speed) is January (11.1mph).
The calmest month (with the lowest average wind speed) is July (7.2mph).

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Average humidity in July
Old Lyme, CT

Average humidity in July - Old Lyme, CT
  • Average humidity in July: 79%

The months with the highest relative humidity are June and July (79%).
The month with the lowest relative humidity is April (73%).

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Average rainfall in July
Old Lyme, CT

Average rainfall in July - Old Lyme, CT
  • Average rainfall in July: 0.83"

The wettest month (with the highest rainfall) is December (0.94").
The driest month (with the least rainfall) is September (0.35").

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Average rainfall days in July
Old Lyme, CT

Average rainfall days in July - Old Lyme, CT
  • Average rainfall days in July: 11.5 days

The month with the highest number of rainy days is July (11.5 days).
The months with the least rainy days are February and November (6.6 days).

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Average snowfall in July
Old Lyme, CT

Average snowfall in July - Old Lyme, CT
  • Average snowfall in July: 0"

The month with the highest snowfall is March (0.63").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in July
Old Lyme, CT

Average snowfall days in July - Old Lyme, CT
  • Average snowfall days in July: 0 days

The month with the highest number of snowfall days is January (5.4 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

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Average daylight in July /
Average sunshine in July
Old Lyme, CT

Average daylight in July / Average sunshine in July - Old Lyme, 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 months with the most sunshine are July and August (Average sunshine: 10h and 36min).
The months with the least sunshine are February and December (Average sunshine: 4h and 48min).

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Average sunshine days in July
Old Lyme, CT

Average sunshine days in July - Old Lyme, CT
  • Average sunshine days in July: 15.8 days

The month with the most sunshine days is November (21.1 days).
The month with the least sunshine days is July (15.8 days).

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Average UV index in July
Old Lyme, CT

Average UV index in July - Old Lyme, 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
Old Lyme, CT

Average cloud cover in July - Old Lyme, 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 28).

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Average visibility in July
Old Lyme, CT

Average visibility in July - Old Lyme, 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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Old Lyme, Connecticut, USA

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