August weather forecast
Chestnut Hill, MD

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Weather in August

The last month of the summer, August, is another warm month in Chestnut Hill, Maryland, with temperature in the range of an average low of 66.7°F (19.3°C) and an average high of 82.8°F (28.2°C).

Temperature

August's advent presents an average high-temperature of a still moderately hot 82.8°F (28.2°C), indicating a slight variation from the conditions of the previous month. The average temperature drops to a comfortable 66.7°F (19.3°C) during the night in the month of August.

Heat index

The heat index in August is evaluated at a tropical 89.6°F (32°C). Extended exposure and activity might lead to tiredness, potentially resulting in heat cramps.
Heat index values are typically calculated for conditions of shade and a light breeze. Heat index values may be hiked up by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'real feel' or 'feels like', is a measure of how hot it feels when the actual air humidity 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. It is important to note that direct sunlight can intensify the weather impact, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

In Chestnut Hill, the average relative humidity in August is 75%.

Rainfall

August is the month with the most rainfall. Rain falls for 11.3 days and accumulates 1.46" (37mm) of precipitation.

Snowfall

May through October are months without snowfall.

Daylight

The average length of the day in August is 13h and 40min.
On the first day of August, sunrise is at 6:07 am and sunset at 8:19 pm. On the last day of the month, sunrise is at 6:35 am and sunset at 7:39 pm EDT.

Sunshine

In Chestnut Hill, 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. A UV Index of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for average individuals.
Note: The maximum daily UV index, 6 in August, converts into the following recommendations:
Dodge overexposure. Fair-skinned people can get singed in less than 20 minutes. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
Updated: Aug 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot does it get in August?

The high-temperature, in August, in Chestnut Hill, records 82.8°F (28.2°C), while the low-temperature is 66.7°F (19.3°C). In August, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which factors the actual air temperature with the relative humidity, is evaluated at 89.6°F (32°C).

What is the average humidity in August?

In August, the average relative humidity is 75%.

What is the wettest month?

August is the month with the most rainfall. Rain falls for 11.3 days and accumulates 1.46" (37mm) of precipitation.

How many days does it rain in August?

In Chestnut Hill, during August, the rain falls for 11.3 days and regularly aggregates up to 1.46" (37mm) of precipitation.

When it does not snow?

May through October are months without snowfall in Chestnut Hill.

How many hours of daylight does Chestnut Hill have in August?

In Chestnut Hill, the average day length in August is 13h and 40min.

When are sunrise and sunset in August in Chestnut Hill?

In August, on the first day of the month, sunrise is at 6:07 am and sunset at 8:19 pm. On the last day of the month, sunrise is at 6:35 am and sunset at 7:39 pm EDT.

How long on average sun shines in August?

The average sunshine duration in August is 10.3h.

When is the highest UV index?

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

What is the UV index reading in August?

In Chestnut Hill, the average daily maximum UV index in August is 6. A UV Index reading of 6 to 7 represents a high hazard to health from unsafe exposure to Sun's UV rays.
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
Chestnut Hill, MD

Average temperature in August - Chestnut Hill, MD
  • Average high temperature in August: 82.8°F

The warmest month (with the highest average high temperature) is July (84.9°F).
The month with the lowest average high temperature is January (37.9°F).

  • Average low temperature in August: 66.7°F

The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (25.9°F).

Average pressure in August
Chestnut Hill, MD

Average pressure in August - Chestnut Hill, 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).

Average wind speed in August
Chestnut Hill, MD

Average wind speed in August - Chestnut Hill, MD
  • Average wind speed in August: 5.5mph

The windiest month (with the highest average wind speed) is March (9.1mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).

Average humidity in August
Chestnut Hill, MD

Average humidity in August - Chestnut Hill, MD
  • Average humidity in August: 75%

The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is April (73%).

Average rainfall in August
Chestnut Hill, MD

Average rainfall in August - Chestnut Hill, MD
  • Average rainfall in August: 1.46"

The wettest month (with the highest rainfall) is August (1.46").
The driest month (with the least rainfall) is January (0.47").

Average rainfall days in August
Chestnut Hill, MD

Average rainfall days in August - Chestnut Hill, MD
  • Average rainfall days in August: 11.3 days

The month with the highest number of rainy days is July (12.6 days).
The month with the least rainy days is January (5.2 days).

Average snowfall in August
Chestnut Hill, MD

Average snowfall in August - Chestnut Hill, MD
  • Average snowfall in August: 0"

The month with the highest snowfall is January (0.55").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in August
Chestnut Hill, MD

Average snowfall days in August - Chestnut Hill, MD
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is February (3.8 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
Chestnut Hill, MD

Average daylight in August / Average sunshine in August - Chestnut Hill, 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 48min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).

Average sunshine days in August
Chestnut Hill, MD

Average sunshine days in August - Chestnut Hill, MD
  • Average sunshine days in August: 16.2 days

The month with the most sunshine days is November (22.9 days).
The month with the least sunshine days is July (15.2 days).

Average UV index in August
Chestnut Hill, MD

Average UV index in August - Chestnut Hill, 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).

Average cloud cover in August
Chestnut Hill, MD

Average cloud cover in August - Chestnut Hill, MD
  • Average cloud cover in August: 32

The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 30).

Average visibility in August
Chestnut Hill, MD

Average visibility in August - Chestnut Hill, 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).

Chestnut Hill, Maryland, USA

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