August weather forecast
Derwood, MD

Weather in August

August, the last month of the summer in Derwood, is also a moderately hot month, with an average temperature ranging between max 84.6°F (29.2°C) and min 66.4°F (19.1°C).

Temperature

In August, the average high-temperature is essentially the same as in July - a moderately hot 84.6°F (29.2°C). The average low-temperature, in August, is 66.4°F (19.1°C).

Heat index

In August, the average heat index is estimated at a hot 93.2°F (34°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Note that heat index values are valued for light wind and location in the shade. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'feels like', 'apparent temperature', or 'real feel', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. This effect is individual, with diverse people perceiving weather differently for numerous reasons (metabolic differences, pregnancy, clothing), and activity. 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 crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

In August, the average relative humidity is 73%.

Rainfall

The month with the most rainfall is August, when the rain falls for 16.7 days and typically aggregates up to 3.82" (97mm) of precipitation.

Snowfall

June through October are months without snowfall in Derwood, Maryland.

Daylight

In Derwood, the average length of the day in August is 13h and 39min.
On the first day of the month, sunrise is at 6:09 am and sunset at 8:20 pm. On the last day of August, in Derwood, Maryland, sunrise is at 6:36 am and sunset at 7:41 pm EDT.

Sunshine

The average sunshine in August is 10.3h.

UV index

May through August, with an average maximum UV index of 6, are months with the highest UV index in Derwood. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: The average daily UV index of 6 in August transform into the following instructions:
Take precautions against overexposure. Protection against sun damage is needed. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in August in Derwood?

The average high-temperature, in August, in Derwood, is 84.6°F (29.2°C), while the average low-temperature is 66.4°F (19.1°C). The average heat index (a.k.a. 'real feel', 'felt air temperature'), which combines relative humidity and air temperature, in August is estimated at 93.2°F (34°C).

What is the average humidity in August in Derwood?

In August, the average relative humidity is 73%.

What is the wettest month in Derwood?

August is the month with the most rainfall. Rain falls for 16.7 days and accumulates 3.82" (97mm) of precipitation.

How many days does it rain in August in Derwood?

In Derwood, in August, it is raining for 16.7 days, with typically 3.82" (97mm) of accumulated precipitation.

When it does not snow in Derwood?

June through October are months without snowfall in Derwood, Maryland.

How many hours of daylight does Derwood have in August?

In August, the average day length is 13h and 39min.

What time are sunrise and sunset in August in Derwood?

In August, on the first day of the month, sunrise is at 6:09 am and sunset at 8:20 pm. On the last day of the month, in Derwood, sunrise is at 6:36 am and sunset at 7:41 pm EDT.

How many hours of sunshine does Derwood have in August?

In August, the average sunshine duration in Derwood, Maryland, is 10.3h.

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

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

What is the UV index reading in August in Derwood?

In Derwood, Maryland, the average daily maximum UV index in August is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Derwood, MD

Average temperature in August - Derwood, MD
  • Average high temperature in August: 84.6°F

The warmest month (with the highest average high temperature) is July (86.9°F).
The month with the lowest average high temperature is January (38.8°F).

  • Average low temperature in August: 66.4°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 (25.2°F).

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Average pressure in August
Derwood, MD

Average pressure in August - Derwood, MD
  • Average pressure in August: 29.99"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
Derwood, MD

Average wind speed in August - Derwood, MD
  • Average wind speed in August: 4.9mph

The windiest month (with the highest average wind speed) is March (8mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).

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Average humidity in August
Derwood, MD

Average humidity in August - Derwood, MD
  • Average humidity in August: 73%

The months with the highest relative humidity are May, October and December (77%).
The month with the lowest relative humidity is July (72%).

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Average rainfall in August
Derwood, MD

Average rainfall in August - Derwood, MD
  • Average rainfall in August: 3.82"

The wettest month (with the highest rainfall) is August (3.82").
The driest month (with the least rainfall) is January (1.73").

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Average rainfall days in August
Derwood, MD

Average rainfall days in August - Derwood, MD
  • Average rainfall days in August: 16.7 days

The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is January (8.7 days).

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Average snowfall in August
Derwood, MD

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

The month with the highest snowfall is January (2.76").
The months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days in August
Derwood, MD

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

The month with the highest number of snowfall days is February (5.3 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

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

Average daylight in August / Average sunshine in August - Derwood, MD
  • Average daylight in August: 13h and 39min

The month with the longest days is June (Average daylight: 14h and 52min).
The month with the shortest days is December (Average daylight: 9h and 28min).

  • Average sunshine in August: 10h and 18min

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 6min).

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Average sunshine days in August
Derwood, MD

Average sunshine days in August - Derwood, MD
  • Average sunshine days in August: 11.9 days

The month with the most sunshine days is November (19.6 days).
The month with the least sunshine days is July (11.5 days).

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Average UV index in August
Derwood, MD

Average UV index in August - Derwood, 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
Derwood, MD

Average cloud cover in August - Derwood, MD
  • Average cloud cover in August: 32

The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 30).

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Average visibility in August
Derwood, MD

Average visibility in August - Derwood, 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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