May weather forecast
Annapolis, MD

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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 May

May sees the city of Annapolis in full spring mode. The noticeable jump in temperature signals the close proximity of summer. Longer days and warmer weather make May the ideal time for outdoor activities and events. However, prospective visitors should prepare for the wettest month of the year in Annapolis. A characteristic trait of May is it's a comparatively higher amount of rainfall, which peaks at 0.87" (22mm).

Temperature

Annapolis in May shows a temperature shift, moving from an average high of a comfortable 62.2°F (16.8°C) in April to a pleasant 71.2°F (21.8°C). Annapolis observes an average low-temperature of 57.7°F (14.3°C) during May nights.

Humidity

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

Rainfall

In Annapolis, in May, during 13.8 rainfall days, 0.87" (22mm) of precipitation is typically accumulated. Throughout the year, in Annapolis, there are 120.4 rainfall days, and 10.47" (266mm) of precipitation is accumulated.

Snowfall

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

Ocean temperature

In Annapolis, in May, the average water temperature is 57.4°F (14.1°C).
Note: Immersing oneself in 57.4°F (14.1°C) at sub14°F (-10°C) temperatures is a recipe for harsh cold shock and quickened breathing unless adequately equipped.

Daylight

The average length of the day in May in Annapolis is 14h and 19min.
On the first day of May, sunrise is at 6:06 am and sunset at 7:59 pm. On the last day of the month, sunrise is at 5:42 am and sunset at 8:25 pm EDT.

Sunshine

The average sunshine in May in Annapolis, Maryland, is 9h.

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 estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for ordinary individuals.
Note: A maximum UV index of 6 in May translates into the following recommendations:
Stand by precautions and apply sun safety measures. Evading sunburn is of great importance. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
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Frequently asked questions

What is the usual temperature for Annapolis in May?

The high-temperature in Annapolis during May is 71.2°F (21.8°C) and the low-temperature is 57.7°F (14.3°C).

What is the most humid month in Annapolis?

May is the most humid month, with an average relative humidity of 78%.

What is the average humidity in May in Annapolis?

In May, the average relative humidity is 78%.

How much does it rain in Annapolis in May?

In May, the rain falls for 13.8 days. Throughout May, 0.87" (22mm) of precipitation is accumulated.

When it does not snow in Annapolis?

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

How cold is the water in May in Annapolis?

In Annapolis, in May, the average water temperature 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.

How many hours of daylight does Annapolis have in May?

The average day length in May in Annapolis, Maryland, is 14h and 19min.

What time are sunrise and sunset in May in Annapolis?

In May, on the first day of the month, sunrise is at 6:06 am and sunset at 7:59 pm. On the last day of the month, sunrise is at 5:42 am and sunset at 8:25 pm EDT.

How many hours of sunshine does Annapolis have in May?

In May, the average sunshine duration in Annapolis, Maryland, is 9h.

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 in Annapolis, Maryland.

How high is the UV index in May in Annapolis?

In May, the average daily maximum UV index in Annapolis, Maryland, is 6. A UV Index estimate of 6 to 7 represents a high health risk from exposure to Sun's UV rays.
Today
Tomorrow
Long-term
YearJFMAMayJJASOND
Apr
May
Jun
Average high temperature
62.2°F 16.8°C
71.2°F 21.8°C
79.3°F 26.3°C
Average low temperature
48.2°F 9°C
57.7°F 14.3°C
66.7°F 19.3°C
Average pressure
29.99" 762mmHg
30.01" 762mmHg
29.94" 760mmHg
Average wind speed
9.7mph 15.6km/h
8mph 12.9km/h
7.5mph 12.1km/h
Average max. wind speed
10.5mph 16.9km/h
8.6mph 13.8km/h
8.1mph 13km/h
Average wind speed gusts
16mph 25.7km/h
13.2mph 21.2km/h
12.2mph 19.6km/h
Average humidity
72%
78%
76%
Average rainfall
0.75" 19mm
0.87" 22mm
1.26" 32mm
Average rainfall days
11.3
13.8
12.8
Average snowfall
0" 0mm
0" 0mm
0" 0mm
Average snowfall days
0.1
0
0
Average sea temperature
51.5°F 10.8°C
57.4°F 14.1°C
69.1°F 20.6°C
Average daylight
13h 1min
14h 2min
14h 5min
Average sunshine
8h 5min
9h 0min
10h 2min
Average sunshine days
17
14.7
14.8
Average UV index
4
6
6
Average cloud cover
40%
41%
31%
Average visibility
6mi 9.7km
6mi 9.7km
6mi 9.7km

Average temperature in May
Annapolis, MD

Average temperature in May - Annapolis, MD
  • Average high temperature in May: 71.2°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 May: 57.7°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 May
Annapolis, MD

Average pressure in May - Annapolis, MD
  • Average pressure in May: 30.01"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 May
Annapolis, MD

Average wind speed in May - Annapolis, MD
  • Average wind speed in May: 8mph

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 May
Annapolis, MD

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

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 May
Annapolis, MD

Average rainfall in May - Annapolis, MD
  • Average rainfall in May: 0.87"

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 May
Annapolis, MD

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

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

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).
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 May
Annapolis, MD

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).

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

Average daylight in May / Average sunshine in May - Annapolis, MD
  • Average daylight in May: 14h and 2min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in May: 9h and 0min

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 May
Annapolis, MD

Average sunshine days in May - Annapolis, MD
  • Average sunshine days in May: 14.7 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 May
Annapolis, MD

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

Average cloud cover in May - Annapolis, MD
  • Average cloud cover in May: 41

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 May
Annapolis, MD

Average visibility in May - Annapolis, MD
  • Average visibility in May: 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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Annapolis, Maryland, USA

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