August weather forecast
Jarrettsville, MD

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Weather in August

The last month of the summer, August, is also a moderately hot month in Jarrettsville, Maryland, with an average temperature fluctuating between 65.7°F (18.7°C) and 82.2°F (27.9°C).

Temperature

The advent of August observes an average high-temperature of a still moderately hot 82.2°F (27.9°C), nearly identical to July's 84.6°F (29.2°C). Throughout August, an average low-temperature of 65.7°F (18.7°C) is experienced in Jarrettsville.

Heat index

August's heat index is evaluated at a tropical 87.8°F (31°C). One might feel worn out with persistent exposure and activity, resulting in heat cramps.
It is important to note that the heat index values are for shaded areas and light wind scenarios. Direct exposure to sunshine could lead to a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. Direct sun rays can make one feel hotter, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Children usually face more risks than adults as their ability to sweat is less. Additionally, their larger skin surface in relation to their petite bodies and higher heat output due to their activities increases their vulnerability.

Humidity

In August, the average relative humidity is 77%.

Rainfall

The month with the most rainfall is August, when the rain falls for 15.9 days and typically aggregates up to 4.09" (104mm) of precipitation.

Snowfall

In Jarrettsville, Maryland, snow does not fall in June through October.

Daylight

The average length of the day in August is 13h and 41min.
On the first day of August in Jarrettsville, sunrise is at 6:05 am and sunset at 8:18 pm. On the last day of the month, sunrise is at 6:33 am and sunset at 7:38 pm EDT.

Sunshine

The average sunshine in August is 10.1h.

UV index

May through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The daily high UV index of 6 during August translates into the following recommendations:
Stand by precautions and apply sun safety measures. Evading sunburn is of great importance. Between 10 a.m. and 4 p.m., the Sun's UV radiation is at its peak. Limit your exposure to direct sunlight during these hours. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
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Frequently asked questions

What are August temperatures in Jarrettsville?

During August, Jarrettsville experiences an average high-temperature of 82.2°F (27.9°C) and a low-temperature of 65.7°F (18.7°C). In August, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which factors the actual air temperature with the relative humidity, is evaluated at 87.8°F (31°C).

What is the average humidity in August in Jarrettsville?

In Jarrettsville, Maryland, the average relative humidity in August is 77%.

What is the rainiest month in Jarrettsville?

August is the month with the most rainfall in Jarrettsville. Rain falls for 15.9 days and accumulates 4.09" (104mm) of precipitation.

How many days does it rain in August in Jarrettsville?

In Jarrettsville, Maryland, in August, during 15.9 rainfall days, 4.09" (104mm) of precipitation is typically accumulated.

When it does not snow in Jarrettsville?

In Jarrettsville, snow does not fall in June through October.

What is the average length of the day in August in Jarrettsville?

The average day length in August is 13h and 41min.

When are sunrise and sunset in August in Jarrettsville?

On the first day of August in Jarrettsville, Maryland, sunrise is at 6:05 am and sunset at 8:18 pm. On the last day of the month, sunrise is at 6:33 am and sunset at 7:38 pm EDT.

How long on average sun shines in August in Jarrettsville?

In August, the average sunshine duration in Jarrettsville, Maryland, is 10.1h.

What are the months with the highest UV index in Jarrettsville?

The months with the highest UV index are May through August, with an average maximum UV index of 6.

What is the UV index intensity in August in Jarrettsville?

In Jarrettsville, Maryland, the average daily maximum UV index in August is 6. A UV Index estimate of 6 to 7 represents 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
Jarrettsville, MD

Average temperature in August - Jarrettsville, MD
  • Average high temperature in August: 82.2°F

The warmest month (with the highest average high temperature) is July (84.6°F).
The month with the lowest average high temperature is January (37.6°F).

  • Average low temperature in August: 65.7°F

The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (25.3°F).

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Average pressure in August
Jarrettsville, MD

Average pressure in August - Jarrettsville, MD
  • Average pressure in August: 29.99"Hg

The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

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Average wind speed in August
Jarrettsville, MD

Average wind speed in August - Jarrettsville, MD
  • Average wind speed in August: 5.4mph

The windiest month (with the highest average wind speed) is March (9.1mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).

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Average humidity in August
Jarrettsville, MD

Average humidity in August - Jarrettsville, MD
  • Average humidity in August: 77%

The month with the highest relative humidity is May (80%).
The month with the lowest relative humidity is April (74%).

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Average rainfall in August
Jarrettsville, MD

Average rainfall in August - Jarrettsville, MD
  • Average rainfall in August: 4.09"

The wettest month (with the highest rainfall) is August (4.09").
The driest month (with the least rainfall) is February (2.09").

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Average rainfall days in August
Jarrettsville, MD

Average rainfall days in August - Jarrettsville, MD
  • Average rainfall days in August: 15.9 days

The month with the highest number of rainy days is May (17.1 days).
The month with the least rainy days is January (8.3 days).

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Average snowfall in August
Jarrettsville, MD

Average snowfall in August - Jarrettsville, MD
  • Average snowfall in August: 0"

The month with the highest snowfall is March (2.87").
The months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days in August
Jarrettsville, MD

Average snowfall days in August - Jarrettsville, MD
  • Average snowfall days in August: 0 days

The months with the highest number of snowfall days are January and February (5.6 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in August /
Average sunshine in August
Jarrettsville, MD

Average daylight in August / Average sunshine in August - Jarrettsville, MD
  • 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 July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).

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Average sunshine days in August
Jarrettsville, MD

Average sunshine days in August - Jarrettsville, MD
  • Average sunshine days in August: 13.3 days

The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is May (11.7 days).

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Average UV index in August
Jarrettsville, MD

Average UV index in August - Jarrettsville, MD
  • 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
Jarrettsville, MD

Average cloud cover in August - Jarrettsville, MD
  • Average cloud cover in August: 33

The month with the most cloud cover is March (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 31).

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Average visibility in August
Jarrettsville, MD

Average visibility in August - Jarrettsville, MD
  • Average visibility in August: 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).

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Jarrettsville, Maryland, USA

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