Contents
- Weather in July
- Frequently asked questions
- Average temperature in July
- Average pressure in July
- Average wind speed in July
- Average humidity in July
- Average rainfall in July
- Average rainfall days in July
- Average snowfall in July
- Average snowfall days in July
- Average daylight in July
- Average sunshine in July
- Average sunshine days in July
- Average UV index in July
- Average cloud cover in July
- Average visibility in July
Weather in July
Temperature
With average high and low temperatures of 31.1°C (88°F) and 20.2°C (68.4°F) respectively, July is Centreville's warmest month.Heat index
During July, the heat index is appraised at a very hot 38°C (100.4°F). Use additional protective measures, heat cramps and heat exhaustion are possible outcomes. Continuous activity might lead to heatstroke.Evaluating the heat index requires understanding its values in the shade and with gentle winds. Direct exposure to sunlight could raise the heat index by 15 Fahrenheit (8 Celsius) degrees.
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 temperature experience can be influenced by extra factors, including metabolic differences, activity levels, and clothing. By being directly under the sun, it's possible for the felt temperature to increase by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.
Perspiring is how the human body naturally cools down, as sweat's evaporation takes away excess heat. Under conditions of high relative humidity, the rate of evaporation decreases. This results in the body retaining more heat than under conditions of dry air. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.
Humidity
With an average relative humidity of 71%, July is the least humid month.Rainfall
In Centreville, in July, during 17 rainfall days, 77mm (3.03") of precipitation is typically accumulated. In Centreville, during the entire year, the rain falls for 162 days and collects up to 804mm (31.65") of precipitation.Snowfall
In Centreville, Virginia, snow does not fall in May through October.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 8:38 pm. On the last day of July, sunrise is at 6:10 am and sunset at 8:21 pm EDT.
Sunshine
July has the most sunshine of the year, with an average of 10.8h of sunshine.UV index
May through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum UV index, 6 during July, leads to the following recommendations:
Employ safeguards and advocate sun safety protocols. Shielding against skin and eye damage is crucial. The time between 10 a.m. and 4 p.m. is when UV radiation is at its peak. Limit exposure to direct sunlight during these hours. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the warmest months?
How hot is July?
What is the least humid month?
What is the average humidity in July?
How much does it rain in July?
When it does not snow?
What is the average length of the day in July?
When is the sunrise / sunset in July in Centreville?
What month has the most sunshine?
How many hours of sunshine does Centreville have in July?
What are the months with the highest UV index?
How high is the UV index in July?
Average temperature in July
Centreville, VA
- Average high temperature in July: 31.1°C
The warmest month (with the highest average high temperature) is July (31.1°C).
The month with the lowest average high temperature is January (4.7°C).
- Average low temperature in July: 20.2°C
The month with the highest average low temperature is July (20.2°C).
The coldest month (with the lowest average low temperature) is January (-3.1°C).
Average pressure in July
Centreville, VA
- Average pressure in July: 1014.9mbar
The month with the highest atmospheric pressure is November (1020.6mbar).
The month with the lowest atmospheric pressure is June (1014.1mbar).
Average wind speed in July
Centreville, VA
- Average wind speed in July: 7.8km/h
The windiest month (with the highest average wind speed) is March (11.9km/h).
The calmest month (with the lowest average wind speed) is August (7.6km/h).
Average humidity in July
Centreville, 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
Centreville, VA
- Average rainfall in July: 77mm
The wettest month (with the highest rainfall) is August (96mm).
The driest month (with the least rainfall) is September (51mm).
Average rainfall days in July
Centreville, VA
- Average rainfall days in July: 17 days
The months with the highest number of rainy days are May and August (17.3 days).
The month with the least rainy days is November (9.1 days).
Average snowfall in July
Centreville, VA
- Average snowfall in July: 0mm
The month with the highest snowfall is January (90mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in July
Centreville, VA
- Average snowfall days in July: 0 days
The month with the highest number of snowfall days is January (5.6 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
Centreville, 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 January, February and December (Average sunshine: 5h and 12min).
Average sunshine days in July
Centreville, VA
- Average sunshine days in July: 11.3 days
The month with the most sunshine days is November (19.6 days).
The month with the least sunshine days is July (11.3 days).
Average UV index in July
Centreville, 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, February, November and December (UV index 2).
Average cloud cover in July
Centreville, 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
Centreville, VA
- Average visibility in July: 9km
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (9km).
The month with the lowest visibility is May (8km).
Centreville, Virginia, USA
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