Contents
- Weather in August
- Frequently asked questions
- Average temperature in August
- Average pressure in August
- Average wind speed in August
- Average humidity in August
- Average rainfall in August
- Average rainfall days in August
- Average snowfall in August
- Average snowfall days in August
- Average daylight in August
- Average sunshine in August
- Average sunshine days in August
- Average UV index in August
- Average cloud cover in August
- Average visibility in August
Weather in August
Temperature
August experiences an average high-temperature of a still moderately hot 82.8°F (28.2°C), barely different from July's 84°F (28.9°C). Sistersville logs a notable disparity from the daily highs during August, as the nighttime temperature lowers to an average of 59.9°F (15.5°C).Heat index
In August, the average heat index is estimated at a tropical 89.6°F (32°C). Exhaustion becomes probable with enduring exposure and activity, potentially causing heat cramps.Heat index specifics point out values are for conditions of shade and a slight breeze. With direct sunlight, the heat index could increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', is found by incorporating humidity levels into the air temperature measurement. The effect is experienced differently by individuals, hinging on unique characteristics such as body mass, stature, and level of activity. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to 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
The least humid month is August, with an average relative humidity of 77%.Rainfall
In Sistersville, during August, the rain falls for 15.8 days and regularly aggregates up to 2.05" (52mm) of precipitation. In Sistersville, during the entire year, the rain falls for 176.6 days and collects up to 25.91" (658mm) of precipitation.Snowfall
In Sistersville, snow does not fall in May through October.Daylight
In August, the average length of the day is 13h and 41min.On the first day of the month, sunrise is at 6:24 am and sunset at 8:36 pm. On the last day of August, sunrise is at 6:52 am and sunset at 7:56 pm EDT.
Sunshine
With an average of 10.1h of sunshine, August has the most sunshine of the year.UV index
In Sistersville, the average daily maximum UV index in August is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum UV index of 5 during August translates into these guidelines:
Guard yourself - An obligation to protect skin and eyes from harm exists. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is August?
What is the least humid month?
What is the average humidity in August?
How much does it rain in August?
When it does not snow?
What is the average length of the day in August?
When are sunrise and sunset in August in Sistersville?
What month has the most sunshine?
How long on average sun shines in August?
How high is the UV index in August?
Average temperature in August
Sistersville, WV
- Average high temperature in August: 82.8°F
The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is January (35.4°F).
- Average low temperature in August: 59.9°F
The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is January (22.1°F).
Average pressure in August
Sistersville, 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).
Average wind speed in August
Sistersville, WV
- Average wind speed in August: 4.2mph
The windiest months (with the highest average wind speed) are January and February (7mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).
Average humidity in August
Sistersville, WV
- Average humidity in August: 77%
The month with the highest relative humidity is February (84%).
The month with the lowest relative humidity is August (77%).
Average rainfall in August
Sistersville, WV
- Average rainfall in August: 2.05"
The wettest month (with the highest rainfall) is May (2.91").
The driest month (with the least rainfall) is September (1.61").
Average rainfall days in August
Sistersville, WV
- Average rainfall days in August: 15.8 days
The month with the highest number of rainy days is May (19.6 days).
The month with the least rainy days is January (10.2 days).
Average snowfall in August
Sistersville, WV
- Average snowfall in August: 0"
The month with the highest snowfall is January (3.19").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in August
Sistersville, WV
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (14.7 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in August /
Average sunshine in August
Sistersville, 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 24min).
- Average sunshine in August: 10h and 1min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 18min).
Average sunshine days in August
Sistersville, WV
- Average sunshine days in August: 12.9 days
The month with the most sunshine days is November (16.9 days).
The months with the least sunshine days are January and February (8.7 days).
Average UV index in August
Sistersville, WV
- Average UV index in August: 5
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in August
Sistersville, WV
- Average cloud cover in August: 34
The month with the most cloud cover is January (Cloud cover 66).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in August
Sistersville, WV
- Average visibility in August: 5mi
The month with the highest visibility is November (6mi).
The month with the lowest visibility is January (4mi).
Sistersville, West Virginia, USA
Weather forecast for your location
2. Allow the app to use your location