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
In Herndon, the highest average temperatures are observed in July, with a high of 82.8°F (28.2°C) and a low of 60.1°F (15.6°C).Heat index
July's heat index is estimated at a tropical 89.6°F (32°C). Persistent activity under exposure might lead to a feeling of weariness, with subsequent heat cramps.Thinking about the heat index, one should account for its values in shaded areas with gentle breezes. With direct sunlight, the heat index could increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', is a value derived by merging air temperature with the humidity to convey how the climate feels. Factors such as metabolic variations, being pregnant, and physical activity can impact an individual's weather perception. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Children typically face more danger than adults as their sweat production is usually lower. Additionally, the bigger skin surface compared to their small size and the increased heat due to their activeness exacerbate the risk.
Humidity
The months with the lowest humidity are June through August and November, with an average relative humidity of 77%.Rainfall
In Herndon, in July, it is raining for 18.3 days, with typically 2.64" (67mm) of accumulated precipitation. Throughout the year, there are 180.7 rainfall days, and 32.24" (819mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall in Herndon, West Virginia.Daylight
In July, the average length of the day is 14h and 27min.On the first day of the month, sunrise is at 6:08 am and sunset at 8:50 pm. On the last day of July, sunrise is at 6:29 am and sunset at 8:34 pm EDT.
Sunshine
The average sunshine in July is 9.9h.UV index
The average daily maximum UV index in July in Herndon is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: The average daily UV index of 5 in July transforms into the following instructions:
Act with care - The suggestion to avoid sunburn is emphasized. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Frequently asked questions
What is the warmest month in Herndon?
How hot is it in Herndon in July?
What is the least humid month in Herndon?
What is the average humidity in July in Herndon?
How many days does it rain in July in Herndon?
When it does not snow in Herndon?
How many hours of daylight does Herndon have in July?
What time are sunrise and sunset in July in Herndon?
How long on average sun shines in July in Herndon?
What is the UV index reading in July in Herndon?
Average temperature in July
Herndon, WV
- Average high temperature in July: 82.8°F
The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is January (38.3°F).
- Average low temperature in July: 60.1°F
The month with the highest average low temperature is July (60.1°F).
The coldest month (with the lowest average low temperature) is January (24.8°F).
Average pressure in July
Herndon, WV
- Average pressure in July: 30.02"Hg
The month with the highest atmospheric pressure is November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.99"Hg).
Average wind speed in July
Herndon, WV
- Average wind speed in July: 4.6mph
The windiest month (with the highest average wind speed) is January (7.4mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).
Average humidity in July
Herndon, WV
- Average humidity in July: 77%
The month with the highest relative humidity is February (83%).
The months with the lowest relative humidity are June, July, August and November (77%).
Average rainfall in July
Herndon, WV
- Average rainfall in July: 2.64"
The wettest months (with the highest rainfall) are February and May (3.43").
The driest month (with the least rainfall) is September (1.57").
Average rainfall days in July
Herndon, WV
- Average rainfall days in July: 18.3 days
The month with the highest number of rainy days is May (20.1 days).
The month with the least rainy days is November (11.3 days).
Average snowfall in July
Herndon, WV
- Average snowfall in July: 0"
The month with the highest snowfall is February (6.02").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in July
Herndon, WV
- Average snowfall days in July: 0 days
The month with the highest number of snowfall days is January (13.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in July /
Average sunshine in July
Herndon, WV
- Average daylight in July: 14h and 3min
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: 9h and 5min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in July
Herndon, WV
- Average sunshine days in July: 10.2 days
The month with the most sunshine days is November (15.8 days).
The month with the least sunshine days is February (8.3 days).
Average UV index in July
Herndon, WV
- Average UV index in July: 5
The months with the highest UV index are June 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
Herndon, WV
- Average cloud cover in July: 37
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 36).
Average visibility in July
Herndon, WV
- Average visibility in July: 5mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
Herndon, West Virginia, USA
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