July weather forecast
Lorton, VA

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Weather in July

July in Lorton, Virginia, is a hot summer month, with an average temperature varying between 88.2°F (31.2°C) and 68.5°F (20.3°C).

Temperature

July is the month when Lorton experiences its warmest temperatures, averaging a high of 88.2°F (31.2°C) and a low of 68.5°F (20.3°C).

Heat index

In July, the heat index is appraised at a very hot 100.4°F (38°C). Adopt heightened preventive measures, heat exhaustion and heat cramps are probable. Persistent activity could lead to heatstroke.
Heat index determinations are made taking into account the shade and light air movements. If exposed to direct sunlight, the heat index could climb by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', melds the effects of warmth and moisture to generate a feeling of heat. A person's impression of weather can be swayed by numerous aspects, among them metabolic variations, pregnancy, and activity levels. Direct sunlight exposure should be noted as it has the potential to increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Youngsters typically face more danger than adults since they sweat less. Their larger skin surface compared to their small bodies and heightened heat production from their activities augment their vulnerability.
By perspiring, the human body can shed its excessive warmth since evaporated sweat cools it off. With high air temperature and humidity (high heat index) conditions, sweat production is restricted, leading to an amplified perception of heat. Heat disorders may be on the horizon when body temperatures rise from inadequate heat management.

Humidity

With an average relative humidity of 71%, July is the least humid month in Lorton.

Rainfall

In Lorton, in July, during 17.3 rainfall days, 3.39" (86mm) of precipitation is typically accumulated. Throughout the year, there are 156.5 rainfall days, and 30.83" (783mm) of precipitation is accumulated.

Snowfall

In Lorton, snow does not fall in May through November.

Daylight

In July, the average length of the day is 14h and 34min.
On the first day of the month, sunrise is at 5:48 am and sunset at 8:37 pm. On the last day of July, in Lorton, Virginia, sunrise is at 6:10 am and sunset at 8:20 pm EDT.

Sunshine

July has the most sunshine of the year in Lorton, with an average of 10.8h of sunshine.

UV index

The months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for average individuals.
Note: A maximum daily UV index of 6 during July morphs into the following directions:
Avert overexposure. Light-skinned people might experience burning in less than 20 minutes. To the best of your ability, limit your exposure to the sun between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Tightly woven clothing, when worn loosely, shields effectively against the Sun.
Updated: Feb 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the warmest months in Lorton?

July is Lorton's warmest month, registering average high temperatures of 88.2°F (31.2°C) and lows of 68.5°F (20.3°C).

Is it hot in Lorton during July?

Lorton in July has an average high-temperature of 88.2°F (31.2°C) and an average low-temperature of 68.5°F (20.3°C). The average heat index (a.k.a. 'real feel', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, in July is appraised at 100.4°F (38°C).

What is the least humid month in Lorton?

July is the least humid month, with an average relative humidity of 71%.

What is the average humidity in July in Lorton?

The average relative humidity in July in Lorton is 71%.

How many days does it rain in July in Lorton?

In Lorton, in July, it is raining for 17.3 days, with typically 3.39" (86mm) of accumulated precipitation.

When it does not snow in Lorton?

In Lorton, Virginia, snow does not fall in May through November.

What is the average length of the day in July in Lorton?

The average day length in July is 14h and 34min.

When are sunrise and sunset in July in Lorton?

In July, on the first day of the month, sunrise is at 5:48 am and sunset at 8:37 pm. On the last day of the month, sunrise is at 6:10 am and sunset at 8:20 pm EDT.

What month has the most sunshine in Lorton?

July has the most sunshine of the year, with an average of 10.8h of sunshine.

How long on average sun shines in July in Lorton?

In July, the average sunshine duration is 10.8h.

What are the months with the highest UV index in Lorton?

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

How high is the UV index in July in Lorton?

In July, the average daily maximum UV index in Lorton is 6. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's 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
Lorton, VA

Average temperature in July - Lorton, VA
  • Average high temperature in July: 88.2°F

The warmest month (with the highest average high temperature) is July (88.2°F).
The month with the lowest average high temperature is January (40.6°F).

  • Average low temperature in July: 68.5°F

The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (27°F).

Average pressure in July
Lorton, VA

Average pressure in July - Lorton, VA
  • Average pressure in July: 29.97"Hg

The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).

Average wind speed in July
Lorton, VA

Average wind speed in July - Lorton, VA
  • Average wind speed in July: 4.8mph

The windiest month (with the highest average wind speed) is March (7.3mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).

Average humidity in July
Lorton, VA

Average humidity in July - Lorton, VA
  • Average humidity in July: 71%

The months with the highest relative humidity are October and December (77%).
The month with the lowest relative humidity is July (71%).

Average rainfall in July
Lorton, VA

Average rainfall in July - Lorton, VA
  • Average rainfall in July: 3.39"

The wettest month (with the highest rainfall) is August (3.98").
The driest month (with the least rainfall) is January (1.73").

Average rainfall days in July
Lorton, VA

Average rainfall days in July - Lorton, VA
  • Average rainfall days in July: 17.3 days

The months with the highest number of rainy days are May and August (17.8 days).
The month with the least rainy days is November (7.7 days).

Average snowfall in July
Lorton, VA

Average snowfall in July - Lorton, VA
  • Average snowfall in July: 0"

The month with the highest snowfall is January (3.23").
The months with the least snowfall are May, June, July, August, September, October and November (0").

Average snowfall days in July
Lorton, VA

Average snowfall days in July - Lorton, VA
  • Average snowfall days in July: 0 days

The month with the highest number of snowfall days is February (4.1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight in July /
Average sunshine in July
Lorton, VA

Average daylight in July / Average sunshine in July - Lorton, VA
  • Average daylight in July: 14h and 4min

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in July: 10h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 48min).
The months with the least sunshine are February and December (Average sunshine: 5h and 12min).

Average sunshine days in July
Lorton, VA

Average sunshine days in July - Lorton, VA
  • Average sunshine days in July: 10.6 days

The month with the most sunshine days is November (20.5 days).
The month with the least sunshine days is August (10.4 days).

Average UV index in July
Lorton, VA

Average UV index in July - Lorton, VA
  • Average UV index in July: 6

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

Average cloud cover in July
Lorton, VA

Average cloud cover in July - Lorton, VA
  • Average cloud cover in July: 31

The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 31).

Average visibility in July
Lorton, VA

Average visibility in July - Lorton, VA
  • Average visibility in July: 6mi

The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).

Lorton, Virginia, USA

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