August weather forecast
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

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

Temperature

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

Heat index

The average heat index in August is computed to be a tropical 89.6°F (32°C). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'felt air temperature', 'real feel', or 'feels like', is a measure of how hot it feels when the actual air humidity is factored in. This effect is individual, with diverse people perceiving weather differently for numerous reasons (clothing, differences in body mass, height, and shape, metabolic differences), 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 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 74%.

Rainfall

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

Snowfall

In Annapolis, snow does not fall in April through October.

Ocean temperature

The month with the warmest seawater in Annapolis is August, with an average ocean temperature of 77.7°F (25.4°C).
Note: For any water activity, surface water temperatures between 77°F (25°C) and 84.2°F (29°C) are considered as excellent and extremely pleasant for lengthened periods.

Daylight

The average length of the day in August in Annapolis is 13h and 38min.
On the first day of August in Annapolis, sunrise is at 6:06 am and sunset at 8:17 pm. On the last day of the month, sunrise is at 6:33 am and sunset at 7:38 pm EDT.

Sunshine

In August, the average sunshine is 10.5h.

UV index

The months with the highest UV index in Annapolis are May through August, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 6 in August interpret into the following advice:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. 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 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. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.
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FAQ

What is the temperature in August in Annapolis?

The average high-temperature, in August, is 83.3°F (28.5°C), while the average low-temperature is 70.5°F (21.4°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which takes the relative humidity and factors it into the air temperature reading, in August is computed to be 89.6°F (32°C).

What is the average humidity in August in Annapolis?

The average relative humidity in August in Annapolis is 74%.

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.

How many days does it rain in August in Annapolis?

In Annapolis, Maryland, during August, the rain falls for 14.3 days and regularly aggregates up to 1.69" (43mm) of precipitation.

When it does not snow in Annapolis?

April through October are months without snowfall in Annapolis, Maryland.

What is the month with the warmest ocean in Annapolis?

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

What is the ocean temperature in August in Annapolis?

In August, the average ocean temperature in Annapolis, Maryland, is 77.7°F (25.4°C). For any water activity, surface water temperatures between 77°F (25°C) and 84.2°F (29°C) are considered as excellent and extremely pleasant for lengthened periods.

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

The average day length in August in Annapolis, Maryland, is 13h and 38min.

When are sunrise and sunset in August in Annapolis?

In August, on the first day of the month, sunrise is at 6:06 am and sunset at 8:17 pm. On the last day of the month, in Annapolis, sunrise is at 6:33 am and sunset at 7:38 pm EDT.

How long on average sun shines in August in Annapolis?

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

What is the month with the highest UV index in Annapolis?

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 Annapolis?

The average daily maximum UV index in August is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to UV radiation.
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
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"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
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%).
The 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

The 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").
The 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).
The 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: 13h and 38min

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 29min).

  • Average sunshine in August: 10h and 30min

The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).

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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

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 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

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
Annapolis, MD

Average visibility in August - Annapolis, 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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