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

May 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
May, the last month of the spring, in Annapolis, is an agreeable month, with average temperature varying between 55.6°F (13.1°C) and 72.9°F (22.7°C).

Temperature

In May, the average high-temperature increases, from a comfortable 63.9°F (17.7°C) in April, to an agreeable 72.9°F (22.7°C). The average low-temperature, in May, is 55.6°F (13.1°C).

Rainfall

In May, the rain falls for 11 days. Throughout May, 4.2" (106.7mm) of precipitation is accumulated. Throughout the year, there are 115.1 rainfall days, and 47.3" (1200.7mm) of precipitation is accumulated.

Ocean temperature

In Annapolis, the average seawater temperature in May is 57.4°F (14.1°C).
Note: Swimming in 57.4°F (14.1°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

Daylight

In Annapolis, the average length of the day is 14.3h.

Sunshine

In May, the average sunshine in Annapolis, Maryland, is 8h.

UV index

In Annapolis, the average daily maximum UV index is 8. A UV Index reading of 8 to 10 represents a very high threat to health from the exposure to the Sun's UV rays for the ordinary person.
Note: The average daily UV index of 8 in May transform into the following instructions:
Take special precautions, as unprotected eyes and skin can be burned and damaged 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. 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.

What is the temperature in May in Annapolis?

The average high-temperature, in May, in Annapolis, Maryland, is 72.9°F (22.7°C), while the average low-temperature is 55.6°F (13.1°C).

How much does it rain in Annapolis in May?

In Annapolis, Maryland, in May, during 11 rainfall days, 4.2" (106.7mm) of precipitation is typically accumulated.

What is the ocean temperature in May in Annapolis?

In Annapolis, Maryland, in May, the average water temperature is 57.4°F (14.1°C). At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.

How many hours of daylight does Annapolis have in May?

In Annapolis, the average length of the day in May is 14.3h.

How many hours of sunshine does Annapolis have in May?

The average sunshine in May is 8h.

What is the UV index reading in May in Annapolis?

In Annapolis, Maryland, the average daily maximum UV index in May is 8. A UV Index of 8 to 10 symbolizes a very high hazard to health from unsafe exposure to the Sun's UV rays.
Average temperature in May - Annapolis, MD
  • Average high temperature in May: 72.9°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 May: 55.6°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 May - Annapolis, MD
  • Average rainfall in May: 4.2"

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 May - Annapolis, MD
  • Average rainfall days in May: 11 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 May - Annapolis, MD
  • Average sea temperature in May: 57.4°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 May / Average sunshine in May - Annapolis, MD
  • Average daylight in May: 14.3h

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 May: 8h

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 May - Annapolis, MD
  • Average UV index in May: 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).