July weather forecastRoslyn Hills, VA
July
Weather in July
July is a hot summer month in Roslyn Hills, Virginia, with temperature in the range of an average high of 90.7°F (32.6°C) and an average low of 69.6°F (20.9°C).Temperature
Roslyn Hills's temperatures peak on average in July, reaching 90.7°F (32.6°C) at their highest and 69.6°F (20.9°C) at their lowest.Heat index
July's mean heat index is computed to be a scorching 105.8°F (41°C). Ensure extra safety steps, heat exhaustion and heat cramps are likely. Long activity might lead to heatstroke.Keep in mind the heat index values are meant for areas in shade and with light wind. An exposure to direct sunlight may lift the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is a composite of temperature and humidity figures to convey how warm it feels. A person's impression of weather can be shaped by many aspects, among them metabolic variations, pregnancy, and levels of physical activity. Keep in mind that direct sunshine exposure can amplify the weather's effects, possibly increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Youngsters frequently overlook the need for breaks and fluid intake. Thirst is an advanced sign of dehydration - thereby highlighting the importance of keeping hydrated, particularly during long physical activities.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. When relative humidity increases, the body's capacity to evaporate heat decreases, leading to a heightened sense of warmth. Overheating risks increase with rising body temperatures, especially if heat release isn't efficient.
Humidity
The least humid month is July, with an average relative humidity of 68%.Rainfall
In Roslyn Hills, in July, it is raining for 14.7 days, with typically 2.32" (59mm) of accumulated precipitation. In Roslyn Hills, during the entire year, the rain falls for 151.1 days and collects up to 26.22" (666mm) of precipitation.Snowfall
In Roslyn Hills, Virginia, snow does not fall in May through October.Daylight
In Roslyn Hills, the average length of the day in July is 14h and 28min.On the first day of the month, sunrise is at 5:52 am and sunset at 8:35 pm. On the last day of July, sunrise is at 6:14 am and sunset at 8:19 pm EDT.
Sunshine
The month with the most sunshine is July, with an average of 10.6h of sunshine.UV index
With an average maximum UV index of 7, July is the month with the highest UV index. A UV Index of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for the ordinary person.Note: The maximum daily UV index of 7 during July translates into the following directions:
Avoid excessive sunlight. Those with lighter skin may experience burning in less than 20 minutes. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in July
Roslyn Hills, VA
- Average high temperature in July: 90.7°F
The warmest month (with the highest average high temperature) is July (90.7°F).
The month with the lowest average high temperature is January (44.2°F).
- Average low temperature in July: 69.6°F
The month with the highest average low temperature is July (69.6°F).
The coldest month (with the lowest average low temperature) is January (29.5°F).
Average pressure in July
Roslyn Hills, VA
- Average pressure in July: 29.98"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
Roslyn Hills, VA
- Average wind speed in July: 5.4mph
The windiest month (with the highest average wind speed) is April (7.4mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in July
Roslyn Hills, VA
- Average humidity in July: 68%
The month with the highest relative humidity is December (78%).
The month with the lowest relative humidity is July (68%).
Average rainfall in July
Roslyn Hills, VA
- Average rainfall in July: 2.32"
The wettest month (with the highest rainfall) is August (2.72").
The driest month (with the least rainfall) is September (1.65").
Average rainfall days in July
Roslyn Hills, VA
- Average rainfall days in July: 14.7 days
The month with the highest number of rainy days is May (16.6 days).
The month with the least rainy days is November (8.8 days).
Average snowfall in July
Roslyn Hills, VA
- Average snowfall in July: 0"
The month with the highest snowfall is February (1.77").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in July
Roslyn Hills, VA
- Average snowfall days in July: 0 days
The month with the highest number of snowfall days is February (3.5 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
Roslyn Hills, VA
- Average daylight in July: 14h and 30min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in July: 10h and 36min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 5h and 12min).
Average sunshine days in July
Roslyn Hills, VA
- Average sunshine days in July: 14.4 days
The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is May (11.9 days).
Average UV index in July
Roslyn Hills, VA
- Average UV index in July: 7
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in July
Roslyn Hills, VA
- Average cloud cover in July: 31
The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in July
Roslyn Hills, 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).
