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
The last month of the spring, May, is a pleasant month in Annapolis, Maryland, with temperature in the range of an average low of 57.7°F (14.3°C) and an average high of 71.2°F (21.8°C).

Temperature

In Annapolis, Maryland, the average high-temperature rises, from an enjoyable 62.2°F (16.8°C) in April, to a pleasant 71.2°F (21.8°C). In Annapolis, the average low-temperature is 57.7°F (14.3°C).

Humidity

With an average relative humidity of 78%, May is the most humid month in Annapolis.

Rainfall

In Annapolis, it is raining for 13.8 days, with typically 0.87" (22mm) of accumulated precipitation. In Annapolis, Maryland, during the entire year, the rain falls for 120.4 days and collects up to 10.47" (266mm) of precipitation.

Snowfall

April through October are months without snowfall.

Ocean temperature

In Annapolis, the average seawater temperature 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 in May is 14.3h.

Sunshine

The average sunshine in May is 9h.

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 value of 6 to 7 symbolizes a high health hazard from unsafe exposure to the UV radiation for the ordinary person.
Note: The average daily UV index of 6 in May transform into the following instructions:
Take precautions and utilize sun safety practices. Protection against the skin and eye damage is required. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. 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, is 71.2°F (21.8°C), while the average low-temperature is 57.7°F (14.3°C).

What is the most humid month in Annapolis?

The most humid month in Annapolis, Maryland, is May, with an average relative humidity of 78%.

What is the average humidity in May in Annapolis?

In Annapolis, the average relative humidity in May is 78%.

How many days does it rain in May in Annapolis?

In Annapolis, during May, the rain falls for 13.8 days and regularly aggregates up to 0.87" (22mm) of precipitation.

When it does not snow in Annapolis?

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

What is the water temperature in May in Annapolis?

In Annapolis, Maryland, the average seawater temperature in May is 57.4°F (14.1°C). Swimming in 57.4°F (14.1°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.

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

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

How many hours of sunshine does Annapolis have in May?

The average sunshine in May in Annapolis is 9h.

When is the highest UV index in Annapolis?

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

How high is the UV index in May in Annapolis?

In Annapolis, Maryland, the average daily maximum UV index in May is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from the exposure to the Sun's UV rays.
Average temperature in May - Annapolis, MD
  • Average high temperature in May: 21.8°C

The warmest month (with the highest average high temperature) is July (29.3°C).
The month with the lowest average high temperature is January (4.6°C).

  • Average low temperature in May: 14.3°C

The month with the highest average low temperature is July (22.2°C).
The coldest month (with the lowest average low temperature) is January (-1.2°C).

Average humidity in May - Annapolis, MD
  • Average humidity in May: 78%

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

Average rainfall in May - Annapolis, MD
  • Average rainfall in May: 22mm

The wettest month (with the highest rainfall) is August (43mm).
The driest month (with the lowest rainfall) is January (12mm).

Average rainfall days in May - Annapolis, MD
  • Average rainfall days in May: 13.8 days

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

Average snowfall in May - Annapolis, MD
  • Average snowfall in May: 0mm

The month with the highest snowfall is January (17mm).
Months with the lowest snowfall are April, May, June, July, August, September and October (0mm).

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

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

Average sea temperature in May - Annapolis, MD
  • Average sea temperature in May: 14.1°C

The best month for swimming (with the highest average sea temperature) is August (25.4°C).
The coldest month (with the lowest average sea temperature) is February (7.3°C).

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: 9h

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

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