July weather forecastArlington, VA
July
Weather in July
July is undisputedly the hottest month in Arlington, with temperatures soaring up to an areal high of 88°F (31.1°C). Despite being at the height of summer, the city doesn't shy away from rainfall, often leading to a humid climate. While wearing light and breathable clothing is recommended, it is also essential to apply sufficient sun protection due to the high UV index level of 6. The long daylight hours continue, inviting people to relish outdoor activities like barbeques and picnics.Temperature
Arlington's warmest month, July, registers temperatures that range from a high of 88°F (31.1°C) to a low of 69.1°F (20.6°C).Heat index
In July, the heat index is appraised at a very hot 100.4°F (38°C). Special measures are necessary to avoid heat cramps and heat exhaustion. Persistent activity could result in heatstroke.From a standpoint of the heat index, values pertain to shaded conditions and mild breezes. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. An individual's perception of weather can be affected by a variety of elements including metabolic differences, being pregnant, and their level of physical exertion. Direct sun rays have a notable impact on perceived temperature, which can raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Young people are generally more susceptible than adults because they perspire less. Furthermore, their proportionally larger skin surface to their petite bodies and the increased heat output from their actions add to the risk.
Evaporating sweat, an outcome of perspiration, is key in assisting the human body to moderate its temperature. Relative humidity in excess curtails evaporation, therefore reducing heat dissipation from the body, leading to feelings of excess heat. Heat absorption that surpasses the body's shedding capability can lead to overheating and varying levels of dehydration.
Humidity
The months with the lowest humidity are April and July, with an average relative humidity of 71%.Rainfall
In July, in Arlington, the rain falls for 16.4 days. Throughout July, 2.76" (70mm) of precipitation is accumulated. In Arlington, during the entire year, the rain falls for 149.1 days and collects up to 26.14" (664mm) of precipitation.Snowfall
April through November are months without snowfall.Daylight
The average length of the day in July is 14h and 35min.On the first day of July in Arlington, sunrise is at 5:47 am and sunset at 8:37 pm. On the last day of the month, sunrise is at 6:09 am and sunset at 8:20 pm EDT.
Sunshine
July has the most sunshine of the year in Arlington, with an average of 10.7h of sunshine.UV index
In July, the average daily maximum UV index in Arlington is 6. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for the average person.Note: The UV index of 6 in July translates into these instructions:
Avoid excessive sunlight. Those with lighter skin may experience burning in less than 20 minutes. Limit your exposure to the sun's UV radiation, which is strongest between 10 a.m. and 4 p.m., and note that parasols or canopies may not provide full sun protection. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in July
Arlington, VA
- Average high temperature in July: 88°F
The warmest month (with the highest average high temperature) is July (88°F).
The month with the lowest average high temperature is January (40.6°F).
- Average low temperature in July: 69.1°F
The month with the highest average low temperature is July (69.1°F).
The coldest month (with the lowest average low temperature) is January (27.5°F).
Average pressure in July
Arlington, 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
Arlington, VA
- Average wind speed in July: 5.1mph
The windiest month (with the highest average wind speed) is March (7.9mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in July
Arlington, VA
- Average humidity in July: 71%
The month with the highest relative humidity is May (76%).
The months with the lowest relative humidity are April and July (71%).
Average rainfall in July
Arlington, VA
- Average rainfall in July: 2.76"
The wettest month (with the highest rainfall) is August (3.46").
The driest month (with the least rainfall) is January (1.57").
Average rainfall days in July
Arlington, VA
- Average rainfall days in July: 16.4 days
The month with the highest number of rainy days is July (16.4 days).
The month with the least rainy days is November (8.1 days).
Average snowfall in July
Arlington, VA
- Average snowfall in July: 0"
The month with the highest snowfall is January (2.17").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in July
Arlington, VA
- Average snowfall days in July: 0 days
The months with the highest number of snowfall days are January and February (3.8 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in July /
Average sunshine in July
Arlington, VA
- Average daylight in July: 14h and 36min
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 42min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The months with the least sunshine are January, February and December (Average sunshine: 5h and 6min).
Average sunshine days in July
Arlington, VA
- Average sunshine days in July: 13.1 days
The month with the most sunshine days is November (20 days).
The month with the least sunshine days is May (12.8 days).
Average UV index in July
Arlington, VA
- Average UV index in July: 6
The month with the highest UV index is June (UV index 7).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in July
Arlington, VA
- Average cloud cover in July: 30
The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility in July
Arlington, 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).
