August weather forecast and climate
Annapolis, MD

The Chesapeake Bay at dusk, in Annapolis, Maryland, with a distant view of the US Naval Academy chapel dome
The Chesapeake Bay at dusk, in Annapolis, Maryland, with a distant view of the US Naval Academy chapel dome

Weather in August

August, the last month of the summer, in Annapolis, is also a moderately hot month, with average temperature ranging between min 70.5°F (21.4°C) and max 83.3°F (28.5°C).

Temperature

In Annapolis, the average high-temperature is relatively the same as in July - a still warm 83.3°F (28.5°C). In Annapolis, in August, the average low-temperature is 70.5°F (21.4°C).

Heat index

The average heat index in August is evaluated at a hot 90.1°F (32.3°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'apparent temperature', 'felt air temperature', or 'feels like', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. This effect is individual, with diverse people perceiving weather differently for numerous reasons (differences in body mass, height, and shape, metabolic differences, clothing), and 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 important for children. 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 in Annapolis is 74%.

Rainfall

The month with the most rainfall is August when the rain falls for 14.3 days and typically aggregates up to 1.69" (43mm) of precipitation.

Snowfall

April through October are months without snowfall in Annapolis.

Ocean temperature

August is the month with the warmest seawater in Annapolis, with an average ocean temperature of 77.7°F (25.4°C).
Note: For swimming, diving, and other water activities, temperatures between 77°F (25°C) and 84.2°F (29°C) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

Daylight

The average length of the day in Annapolis is 13.6h.

Sunshine

In August, the average sunshine in Annapolis is 10.5h.

UV index

Months with the highest UV index in Annapolis are May through August, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health hazard from the exposure to the Sun's UV radiation for average individuals.
Note: In August, the average maximum UV index of 6 translate into the following recommendations:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for 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. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in August in Annapolis?

In Annapolis, in August, the average high-temperature is 83.3°F (28.5°C), and the average low-temperature is 70.5°F (21.4°C). In August, the average heat index (a.k.a. 'felt air temperature', 'feels like'), that combines both air temperature and relative humidity, is estimated at 90.1°F (32.3°C).

What is the average humidity in August in Annapolis?

In Annapolis, Maryland, the average relative humidity in August is 74%.

How much does it rain in Annapolis in August?

In Annapolis, in August, during 14.3 rainfall days, 1.69" (43mm) of precipitation is typically accumulated.

What is the rainiest month in Annapolis?

August is the month with the most rainfall in Annapolis. Rain falls for 14.3 days and accumulates 1.69" (43mm) of precipitation.

When it does not snow in Annapolis?

In Annapolis snow does not fall in April through October.

What month is the ocean warmest in Annapolis?

With an average ocean temperature of 77.7°F (25.4°C), August is the month with the warmest seawater in Annapolis, Maryland.

What is the ocean temperature in August in Annapolis?

In August, the average ocean temperature is 77.7°F (25.4°C). Water temperature between 77°F (25°C) and 84.2°F (29°C) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

How many hours of daylight does Annapolis have in August?

The average length of the day in August in Annapolis, Maryland, is 13.6h.

How long on average sun shines in August in Annapolis?

In August, the average sunshine is 10.5h.

When is the highest UV index in Annapolis?

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

What is the UV index intensity in August in Annapolis?

In August, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high health risk from the exposure to the Sun's UV rays.

Average temperature in August
Annapolis, MD

Average temperature in August - Annapolis, MD
  • Average high temperature in August: 83.3°F

The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (40.3°F).

  • Average low temperature in August: 70.5°F

The month with the highest average low temperature is July (72°F).
The coldest month (with the lowest average low temperature) is January (29.8°F).

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Average pressure in August
Annapolis, MD

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

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

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Average wind speed in August
Annapolis, MD

Average wind speed in August - Annapolis, MD
  • Average wind speed in August: 6.6mph

The windiest month (with the highest average wind speed) is January (10mph).
The calmest months (with the lowest average wind speed) are July and August (6.6mph).

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Average humidity in August
Annapolis, MD

Average humidity in August - Annapolis, MD
  • Average humidity in August: 74%

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

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Average rainfall in August
Annapolis, MD

Average rainfall in August - Annapolis, MD
  • Average rainfall in August: 1.69"

The wettest month (with the highest rainfall) is August (1.69").
The driest month (with the least rainfall) is January (0.47").

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Average rainfall days in August
Annapolis, MD

Average rainfall days in August - Annapolis, MD
  • Average rainfall days in August: 14.3 days

Months with the highest number of rainy days are July and August (14.3 days).
The month with the least rainy days is November (5.3 days).

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Average snowfall in August
Annapolis, MD

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

The month with the highest snowfall is January (0.67").
Months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in August
Annapolis, MD

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

The month with the highest number of snowfall days is February (2.5 days).
Months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average sea temperature in August
Annapolis, MD

Average sea temperature in August - Annapolis, MD
  • Average sea temperature in August: 77.8°F

The best month for swimming (with the highest average sea temperature) is August (77.8°F).
The coldest month (with the lowest average sea temperature) is February (45.1°F).

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

Average daylight in August / Average sunshine in August - Annapolis, MD
  • Average daylight in August: 13.6h

The month with the longest days is June (Average daylight: 14.9h).
The month with the shortest days is December (Average daylight: 9.5h).

  • Average sunshine in August: 10.5h

The month with the most sunshine is July (Average sunshine: 10.8h).
The month with the least sunshine is February (Average sunshine: 5h).

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Average sunshine days in August
Annapolis, MD

Average sunshine days in August - Annapolis, MD
  • Average sunshine days in August: 13.8 days

The month with the most sunshine days is November (23.4 days).
The month with the least sunshine days is August (13.8 days).

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Average UV index in August
Annapolis, MD

Average UV index in August - Annapolis, MD
  • Average UV index in August: 6

Months with the highest UV index are May, June, July and August (UV index 6).
Months with the lowest UV index are January, February and December (UV index 2).

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Average cloud cover in August
Annapolis, MD

Average cloud cover in August - Annapolis, MD
  • Average cloud cover in August: 29

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
Annapolis, MD

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

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

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