August weather forecast
Arnold, MD

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Weather in August

The last month of the summer, August, is another warm month in Arnold, Maryland, with an average temperature varying between 69.1°F (20.6°C) and 83.7°F (28.7°C).

Temperature

Entering August, the average high-temperature is recorded at a still warm 83.7°F (28.7°C), exhibiting a minimal shift from July's 85.6°F (29.8°C). Arnold's nighttime temperature in August drops to an average of 69.1°F (20.6°C).

Heat index

For most parts of August, the heat index is calculated to be a hot 91.4°F (33°C). Greater safety measures are needed, risk of heat exhaustion and heat cramps is high. Continuous activity might trigger heatstroke.
Given the heat index, its values are aligned with shaded sites and gentle winds. The heat index may scale up by 15 Fahrenheit (8 Celsius) degrees with direct sun exposure.
Note: The heat index, also known as 'feels like' or 'real feel', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. An individual's perception of weather can be influenced by a variety of factors including metabolic differences, being pregnant, and their degree of physical exertion. Sunshine, when direct, has the potential to intensify weather effects, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Children often overlook the necessity for resting and fluid replenishment. Thirst is a late sign of dehydration - thus, it is critical to stay hydrated, especially during extended periods of physical activities.

Humidity

The average relative humidity in August is 73%.

Rainfall

The month with the most rainfall is August, when the rain falls for 13.9 days and typically aggregates up to 3.54" (90mm) of precipitation.

Snowfall

May through October are months without snowfall in Arnold.

Daylight

In August, the average length of the day in Arnold is 13h and 39min.
On the first day of the month, sunrise is at 6:07 am and sunset at 8:17 pm. On the last day of August, sunrise is at 6:34 am and sunset at 7:37 pm EDT.

Sunshine

In Arnold, Maryland, the average sunshine in August is 10.4h.

UV index

May through August, with an average maximum UV index of 6, are months with the highest UV index in Arnold. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for average individuals.
Note: The UV index of 6 during August leads to these advisories:
Sidestep overexposure. Individuals with fair complexions risk burning in fewer than 20 minutes. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
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Frequently asked questions

How hot does it get in Arnold in August?

August temperatures in Arnold, Maryland, vary between a high-temperature of 83.7°F (28.7°C) and a low-temperature of 69.1°F (20.6°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which combines air temperature and relative humidity, in August is calculated to be 91.4°F (33°C).

What is the average humidity in August in Arnold?

In Arnold, the average relative humidity in August is 73%.

What is the wettest month in Arnold?

August is the month with the most rainfall in Arnold, Maryland. Rain falls for 13.9 days and accumulates 3.54" (90mm) of precipitation.

How many days does it rain in August in Arnold?

In Arnold, in August, during 13.9 rainfall days, 3.54" (90mm) of precipitation is typically accumulated.

When it does not snow in Arnold?

May through October are months without snowfall.

How many hours of daylight does Arnold have in August?

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

When are sunrise and sunset in August in Arnold?

On the first day of August in Arnold, sunrise is at 6:07 am and sunset at 8:17 pm. On the last day of the month, sunrise is at 6:34 am and sunset at 7:37 pm EDT.

How long on average sun shines in August in Arnold?

In August, the average sunshine duration in Arnold is 10.4h.

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

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

What is the UV index intensity in August in Arnold?

In Arnold, 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 exposure to the Sun's 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
Arnold, MD

Average temperature in August - Arnold, MD
  • Average high temperature in August: 83.7°F

The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (39.6°F).

  • Average low temperature in August: 69.1°F

The month with the highest average low temperature is July (70.7°F).
The coldest month (with the lowest average low temperature) is January (28.4°F).

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Average pressure in August
Arnold, MD

Average pressure in August - Arnold, 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 (29.94"Hg).

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Average wind speed in August
Arnold, MD

Average wind speed in August - Arnold, MD
  • Average wind speed in August: 6mph

The windiest month (with the highest average wind speed) is March (9.4mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).

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Average humidity in August
Arnold, MD

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

The month with the highest relative humidity is May (78%).
The months with the lowest relative humidity are January, March, April and November (72%).

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Average rainfall in August
Arnold, MD

Average rainfall in August - Arnold, MD
  • Average rainfall in August: 3.54"

The wettest month (with the highest rainfall) is August (3.54").
The driest month (with the least rainfall) is September (1.89").

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Average rainfall days in August
Arnold, MD

Average rainfall days in August - Arnold, MD
  • Average rainfall days in August: 13.9 days

The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is November (9.4 days).

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Average snowfall in August
Arnold, MD

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

The month with the highest snowfall is January (2.05").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in August
Arnold, MD

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

The month with the highest number of snowfall days is January (4.4 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
Arnold, MD

Average daylight in August / Average sunshine in August - Arnold, 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 30min).

  • Average sunshine in August: 10h and 2min

The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is February (Average sunshine: 5h and 6min).

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Average sunshine days in August
Arnold, MD

Average sunshine days in August - Arnold, MD
  • Average sunshine days in August: 15.3 days

The month with the most sunshine days is November (18.7 days).
The month with the least sunshine days is May (10.8 days).

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Average UV index in August
Arnold, MD

Average UV index in August - Arnold, 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, November and December (UV index 2).

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Average cloud cover in August
Arnold, MD

Average cloud cover in August - Arnold, MD
  • Average cloud cover in August: 30

The months with the most cloud cover are February and March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 28).

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Average visibility in August
Arnold, MD

Average visibility in August - Arnold, MD
  • Average visibility in August: 6mi

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

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Arnold, Maryland, USA

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