August weather forecast
Harpers Ferry, WV

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Weather in August

August, the last month of the summer in Harpers Ferry, is another warm month, with an average temperature ranging between min 63.3°F (17.4°C) and max 83.8°F (28.8°C).

Temperature

As July transitions into August, Harpers Ferry records an average high-temperature of a moderately hot 83.8°F (28.8°C), showing a gentle shift from the preceding month. August in Harpers Ferry, West Virginia, is noted for a mean low-temperature of 63.3°F (17.4°C).

Heat index

The heat index value during August is evaluated at a hot 91.4°F (33°C). Undertake extra safety actions, heat cramps and heat exhaustion are expected. Heatstroke may result from lengthy activity.
Take note of the fact that heat index values are based on shaded circumstances with light airflows. Direct sunlight might lead to a heat index increase by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', takes into account both air temperature and humidity to illustrate what people actually feel. The impact of temperature is individual, as people's perception of weather may change based on their body mass, height, and physical activity. Being under direct sunshine can magnify the heat experience, possibly pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Juveniles often do not understand the need to recuperate and rehydrate. Thirst is a delayed symptom of dehydration - hence, it is vital to maintain hydration, particularly during ongoing physical activities.

Humidity

In Harpers Ferry, the average relative humidity in August is 75%.

Rainfall

In August, in Harpers Ferry, the rain falls for 15.7 days. Throughout August, 3.03" (77mm) of precipitation is accumulated. Throughout the year, there are 163.3 rainfall days, and 29.84" (758mm) of precipitation is accumulated.

Snowfall

In Harpers Ferry, snow does not fall in May through October.

Daylight

In Harpers Ferry, the average length of the day in August is 13h and 40min.
On the first day of August in Harpers Ferry, West Virginia, sunrise is at 6:11 am and sunset at 8:22 pm. On the last day of the month, sunrise is at 6:39 am and sunset at 7:42 pm EDT.

Sunshine

In August, the average sunshine is 10.3h.

UV index

May through August, with an average maximum UV index of 6, are months with the highest UV index in Harpers Ferry, West Virginia. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for the ordinary person.
Note: A daily high UV index of 6 in August leads to these guidelines:
Shun overexposure. Protection from sun ravages is indispensable. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. Enhance your sun protection with tightly woven, yet airy clothing.
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Frequently asked questions

Is it hot in Harpers Ferry during August?

The average high-temperature, in August, in Harpers Ferry, is 83.8°F (28.8°C), while the average low-temperature is 63.3°F (17.4°C). In August, the average heat index (a.k.a. 'feels like', 'real feel'), which factors the actual air temperature with the relative humidity, is evaluated at 91.4°F (33°C).

What is the average humidity in August in Harpers Ferry?

In Harpers Ferry, the average relative humidity in August is 75%.

How much does it rain in Harpers Ferry in August?

In Harpers Ferry, during August, the rain falls for 15.7 days and regularly aggregates up to 3.03" (77mm) of precipitation.

When it does not snow in Harpers Ferry?

In Harpers Ferry, snow does not fall in May through October.

How many hours of daylight does Harpers Ferry have in August?

The average day length in August is 13h and 40min.

When are sunrise and sunset in August in Harpers Ferry?

On the first day of August, sunrise is at 6:11 am and sunset at 8:22 pm. On the last day of the month, sunrise is at 6:39 am and sunset at 7:42 pm EDT.

How many hours of sunshine does Harpers Ferry have in August?

In Harpers Ferry, West Virginia, the average sunshine duration in August is 10.3h.

What is the month with the highest UV index in Harpers Ferry?

The months with the highest UV index in Harpers Ferry, West Virginia, are May through August, with an average maximum UV index of 6.

How high is the UV index in August in Harpers Ferry?

In Harpers Ferry, the average daily maximum UV index in August is 6. A UV Index value of 6 to 7 symbolizes a high health threat from unprotected exposure to 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 August
Harpers Ferry, WV

Average temperature in August - Harpers Ferry, WV
  • Average high temperature in August: 83.8°F

The warmest month (with the highest average high temperature) is July (86.4°F).
The month with the lowest average high temperature is January (38.1°F).

  • Average low temperature in August: 63.3°F

The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).

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Average pressure in August
Harpers Ferry, WV

Average pressure in August - Harpers Ferry, WV
  • Average pressure in August: 30"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).

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Average wind speed in August
Harpers Ferry, WV

Average wind speed in August - Harpers Ferry, WV
  • Average wind speed in August: 4.4mph

The windiest month (with the highest average wind speed) is March (7.5mph).
The calmest month (with the lowest average wind speed) is August (4.4mph).

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Average humidity in August
Harpers Ferry, WV

Average humidity in August - Harpers Ferry, WV
  • Average humidity in August: 75%

The month with the highest relative humidity is October (79%).
The months with the lowest relative humidity are April and July (74%).

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Average rainfall in August
Harpers Ferry, WV

Average rainfall in August - Harpers Ferry, WV
  • Average rainfall in August: 3.03"

The wettest month (with the highest rainfall) is May (3.35").
The driest month (with the least rainfall) is January (1.97").

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Average rainfall days in August
Harpers Ferry, WV

Average rainfall days in August - Harpers Ferry, WV
  • Average rainfall days in August: 15.7 days

The month with the highest number of rainy days is May (19.3 days).
The month with the least rainy days is January (9.1 days).

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Average snowfall in August
Harpers Ferry, WV

Average snowfall in August - Harpers Ferry, WV
  • Average snowfall in August: 0"

The month with the highest snowfall is January (3.62").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in August
Harpers Ferry, WV

Average snowfall days in August - Harpers Ferry, WV
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (6.9 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average daylight in August /
Average sunshine in August
Harpers Ferry, WV

Average daylight in August / Average sunshine in August - Harpers Ferry, WV
  • Average daylight in August: 13h and 4min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in August: 10h and 2min

The month with the most sunshine is July (Average sunshine: 10h and 42min).
The months with the least sunshine are January and February (Average sunshine: 5h and 0min).

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Average sunshine days in August
Harpers Ferry, WV

Average sunshine days in August - Harpers Ferry, WV
  • Average sunshine days in August: 13.1 days

The month with the most sunshine days is November (18.6 days).
The month with the least sunshine days is May (10.7 days).

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Average UV index in August
Harpers Ferry, WV

Average UV index in August - Harpers Ferry, WV
  • Average UV index in August: 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).

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Average cloud cover in August
Harpers Ferry, WV

Average cloud cover in August - Harpers Ferry, WV
  • Average cloud cover in August: 32

The months with the most cloud cover are February and March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 31).

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Average visibility in August
Harpers Ferry, WV

Average visibility in August - Harpers Ferry, WV
  • Average visibility in August: 6mi

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

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Harpers Ferry, West Virginia, USA

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