Annapolis
Maryland, USA
Long-term weather forecast
Long-term weather forecast

August weather forecast and climate
Annapolis, MD

A view of Chesapeake Bay at dusk, in Annapolis, Maryland, with a distant view of the US Naval Academy chapel dome
A view of Chesapeake Bay at dusk, in Annapolis, Maryland, with a distant view of the US Naval Academy chapel dome
The last month of the summer, August, is also a moderately hot month in Annapolis, Maryland, with average temperature varying between 69.1°F (20.6°C) and 84°F (28.9°C).

Temperature

In Annapolis, the average high-temperature is essentially the same as in July - a still moderately hot 84°F (28.9°C). In August, in Annapolis, the average low-temperature is 69.1°F (20.6°C).

Rainfall

In Annapolis, Maryland, in August, during 8.8 rainfall days, 3.9" (98.6mm) of precipitation is typically accumulated. In Annapolis, during the entire year, the rain falls for 115.1 days and collects up to 47.3" (1200.7mm) of precipitation.

Ocean temperature

August is the month with the warmest seawater, 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

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

Sunshine

June through August, with an average of 9h of sunshine, are months with the most sunshine.

UV index

The average daily maximum UV index in August is 8. A UV Index estimate of 8 to 10 represents a very high health hazard from the exposure to the Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 8 transform into the following instructions:
Take special precautions, as unprotected skin can be damaged and can burn quickly. 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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.

What is the temperature in August in Annapolis?

In Annapolis, in August, the average high-temperature is 84°F (28.9°C), and the average low-temperature is 69.1°F (20.6°C).

How many days does it rain in August in Annapolis?

In Annapolis, Maryland, in August, during 8.8 rainfall days, 3.9" (98.6mm) of precipitation is typically accumulated.

What is the month with the warmest ocean in Annapolis?

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

What is the water temperature in August in Annapolis?

In August, the average ocean temperature in Annapolis is 77.7°F (25.4°C). 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.

How many hours of daylight does Annapolis have in August?

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

What is the month with the most sunshine in Annapolis?

Months with the most sunshine in Annapolis are June through August, with an average of 9h of sunshine.

How long on average sun shines in August in Annapolis?

In August, the average sunshine in Annapolis is 9h.

What is the UV index reading in August in Annapolis?

In August, the average daily maximum UV index in Annapolis is 8. A UV Index estimate of 8 to 10 represents a very high health vulnerability from the exposure to the Sun's UV radiation.
Average temperature in August - Annapolis, MD
  • Average high temperature in August: 84°F

The warmest month (with the highest average high temperature) is July (85.8°F).
The month with the lowest average high temperature is January (42.7°F).

  • Average low temperature in August: 69.1°F

The month with the highest average low temperature is July (71.2°F).
The coldest month (with the lowest average low temperature) is January (29.1°F).

Average rainfall in August - Annapolis, MD
  • Average rainfall in August: 3.9"

The wettest month (with the highest rainfall) is September (4.8").
The driest month (with the lowest rainfall) is February (2.9").

Average rainfall days in August - Annapolis, MD
  • Average rainfall days in August: 8.8 days

Months with the highest number of rainy days are March and April (11.2 days).
Months with the lowest number of rainy days are September and October (7.8 days).

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).

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 shortest days is December (Average daylight: 9.5h).

  • Average sunshine in August: 9h

Months with most sunshine are June, July and August (Average sunshine: 9h).
Months with least sunshine are January, November and December (Average sunshine: 5).

Average UV index in August - Annapolis, MD
  • Average UV index in August: 8

Months with the highest UV index are June and July (UV index 9).
Months with the lowest UV index are January and December (UV index 2).