April weather forecast and climate
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
April in Annapolis, Maryland, is a comfortable spring month, with average temperature fluctuating between 48.2°F (9°C) and 62.2°F (16.8°C).

Temperature

In April, the average high-temperature rises, from a cool 50.5°F (10.3°C) in March, to a comfortable 62.2°F (16.8°C). The average low-temperature, in Annapolis, is 48.2°F (9°C).

Humidity

Months with the lowest humidity are January, March, April and November, with an average relative humidity of 72%.

Rainfall

In Annapolis, in April, it is raining for 11.3 days, with typically 0.75" (19mm) of accumulated precipitation. Throughout the year, there are 120.4 rainfall days, and 10.47" (266mm) of precipitation is accumulated.

Snowfall

April through October are months without snowfall in Annapolis.

Ocean temperature

In April, the average ocean temperature is 51.4°F (10.8°C).
Note: Swimming in 51.4°F (10.8°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.

Daylight

The average length of the day in Annapolis, Maryland, is 13.3h.

Sunshine

In Annapolis, the average sunshine is 8.8h.

UV index

In Annapolis, Maryland, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to the UV radiation for ordinary individuals.
Note: In April, the average maximum UV index of 4 translate into the following recommendations:
Take precautions - Protection against sunburn is recommended. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.

What is the temperature in April in Annapolis?

In Annapolis, in April, the average high-temperature is 62.2°F (16.8°C), and the average low-temperature is 48.2°F (9°C).

What is the least humid month in Annapolis?

January, March, April and November, with an average relative humidity of 72%, are the least humid months in Annapolis, Maryland.

What is the average humidity in April in Annapolis?

In April, the average relative humidity is 72%.

How many days does it rain in April in Annapolis?

In Annapolis, Maryland, in April, it is raining for 11.3 days, with typically 0.75" (19mm) of accumulated precipitation.

Does it snow in Annapolis in April?

In April, in Annapolis, Maryland, it doesn't snow. March is the latest month when it typically snows.

When it does not snow in Annapolis?

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

What is the water temperature in April in Annapolis?

In April, the average ocean temperature is 51.4°F (10.8°C). Swimming in 51.4°F (10.8°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 April in Annapolis?

The average length of the day in April in Annapolis, Maryland, is 13.3h.

How long on average sun shines in April in Annapolis?

In April, the average sunshine in Annapolis, Maryland, is 8.8h.

What is the UV index reading in April in Annapolis?

In April, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a medium hazard to health from unsafe exposure to the Sun's UV rays.
Average temperature in April - Annapolis, MD
  • Average high temperature in April: 16.8°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 April: 9°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 pressure in April - Annapolis, MD
  • Average pressure in April: 1015.7mbar

The month with the highest atmospheric pressure is November (1020.4mbar).
The month with the lowest atmospheric pressure is June (1014mbar).

Average wind speed in April - Annapolis, MD
  • Average wind speed in April: 15.6km/h

The windiest month (with the highest average wind speed) is January (16.1km/h).
The calmest months (with the lowest average wind speed) are July and August (10.6km/h).

Average humidity in April - Annapolis, MD
  • Average humidity in April: 72%

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 April - Annapolis, MD
  • Average rainfall in April: 19mm

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

Average rainfall days in April - Annapolis, MD
  • Average rainfall days in April: 11.3 days

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).

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

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

Average snowfall days in April - Annapolis, MD
  • Average snowfall days in April: 0.1 days

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

Average sea temperature in April - Annapolis, MD
  • Average sea temperature in April: 10.8°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 April / Average sunshine in April - Annapolis, MD
  • Average daylight in April: 13.3h

The month with the longest days is June (Average daylight: 14.9h).
The month with the shortest days is December (Average daylight: 9.5h).

  • Average sunshine in April: 8.8h

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

Average sunshine days in April - Annapolis, MD
  • Average sunshine days in April: 17 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).

Average UV index in April - Annapolis, MD
  • Average UV index in April: 4

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).

Average cloud cover in April - Annapolis, MD
  • Average cloud cover in April: 40

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).

Average visibility in April - Annapolis, MD
  • Average visibility in April: 10km

Months with the highest visibility are February, April, June, July, August, October and November (10km).
Months with the lowest visibility are January, March, May, September and December (9km).