April weather forecastAnnapolis, MD

The Chesapeake Bay at dusk, in Annapolis, Maryland, with a distant view of the US Naval Academy chapel dome

April

Weather in April

April in Annapolis is marked by a visible leap from the lingering chill of early spring to a more comfortable climate. The harbinger of this weather transformation is the significant jump in both daytime and nighttime temperatures. April also signals the peak of spring showers, culminating in average rainfall of 0.75" (19mm). Outdoor enthusiasts can joy in the longer daylight hours, pleasantly warm days, and temperate nights this month brings. It is a month of pleasant weather transitions.

Temperature

As March transitions into April, Annapolis sees a rise in the average high-temperature, moving from a cool 50.5°F (10.3°C) to a refreshing 62.2°F (16.8°C). Annapolis's temperature lowers to a mean of 48.2°F (9°C) during the nights in April.

Humidity

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

Rainfall

In Annapolis, in April, during 11.3 rainfall days, 0.75" (19mm) 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 April, the average water temperature is 51.4°F (10.8°C).
Note: Without suitable protection, venturing into 51.4°F (10.8°C) waters cooler than 50°F (10°C) can lead to pronounced cold shock and rapid breaths.

Daylight

The average length of the day in April is 13h and 15min.
On the first day of the month, sunrise is at 6:49 am and sunset at 7:30 pm. On the last day of April, sunrise is at 6:08 am and sunset at 7:58 pm EDT.

Sunshine

The average sunshine in April is 8.8h.

UV index

In April, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: In April, the UV index of 4 transforms into the following advice:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.

Updated: Jun 4, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

The average high-temperature and low-temperature during April are 62.2°F (16.8°C) and 48.2°F (9°C) respectively.

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

The average relative humidity in April is 72%.

In April, the rain falls for 11.3 days. Throughout April, 0.75" (19mm) of precipitation is accumulated.

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

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

In April, the average ocean temperature is 51.4°F (10.8°C). Swimming in 51.4°F (10.8°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

In April, the average day length is 13h and 15min.

On the first day of April, sunrise is at 6:49 am and sunset at 7:30 pm. On the last day of the month, sunrise is at 6:08 am and sunset at 7:58 pm EDT.

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

In April, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a moderate vulnerability from unsafe exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year J F M April M J J A S O N D

Mar

April

May

Average high temperature

50.5°F

62.2°F

71.2°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

10.6mph

10.5mph

8.6mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

1.5

0.1

Average sea temperature

Average daylight

Average sunshine

Average sunshine days

19.8

14.7

Average UV index

Average cloud cover

Average visibility

Average temperature in April
Annapolis, MD

Average high temperature in April: 62.2°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 April: 48.2°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).

Average pressure in April
Annapolis, MD

Average pressure in April: 29.99"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).

Average wind speed in April
Annapolis, MD

Average wind speed in April: 9.7mph

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).

Average humidity in April
Annapolis, MD

Average humidity in April: 72%

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

Average rainfall in April
Annapolis, MD

Average rainfall in April: 0.75"

The wettest month (with the highest rainfall) is August (1.69").
The driest month (with the least rainfall) is January (0.47").

Average rainfall days in April
Annapolis, MD

Average rainfall days in April: 11.3 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).

Average snowfall in April
Annapolis, MD

Average snowfall in April: 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").

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).
The 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: 51.5°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 April /
Average sunshine in April
Annapolis, MD

Average daylight in April: 13h and 12min

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 April: 8h and 48min

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).

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

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).

Average cloud cover in April
Annapolis, MD

Average cloud cover in April: 40

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).

Average visibility in April
Annapolis, MD

Average visibility in April: 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).