April weather forecast and climate
Herald Harbor, MD

Weather in April

April in Herald Harbor, Maryland, is an enjoyable spring month, with average temperature fluctuating between 47.5°F (8.6°C) and 62.8°F (17.1°C).

Temperature

In Herald Harbor, the average high-temperature rises, from a cool 50.7°F (10.4°C) in March, to a comfortable 62.8°F (17.1°C). In April, the average low-temperature is 47.5°F (8.6°C).

Humidity

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

Rainfall

In Herald Harbor, during April, the rain falls for 15.7 days and regularly aggregates up to 2.6" (66mm) of precipitation. In Herald Harbor, during the entire year, the rain falls for 155.7 days and collects up to 31.22" (793mm) of precipitation.

Snowfall

January through April, November and December are months with snowfall. April is the last month it regularly snows. During 0.1 snowfall days, Herald Harbor aggregates 0.08" (2mm) of snow. Throughout the year, there are 14 snowfall days, and 6.14" (156mm) of snow is accumulated.

Ocean temperature

In Herald Harbor, the average seawater temperature is 50.5°F (10.3°C).
Note: Swimming in 50.5°F (10.3°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

Daylight

In Herald Harbor, the average length of the day is 13.3h.

Sunshine

The average sunshine is 8.8h.

UV index

In April, the average daily maximum UV index in Herald Harbor is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to the UV radiation for ordinary individuals.
Note: The daily maximum UV index of 4 interpret into the following advice:
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. 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. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the least humid month in Herald Harbor?

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

What is the average humidity in April in Herald Harbor?

The average relative humidity in April in Herald Harbor, Maryland, is 72%.

How much does it rain in Herald Harbor in April?

In Herald Harbor, Maryland, during April, the rain falls for 15.7 days and regularly aggregates up to 2.6" (66mm) of precipitation.

What is the last month it snows in Herald Harbor?

April is the last month it regularly snows in Herald Harbor, Maryland. During 0.1 snowfall days, in April, Herald Harbor aggregates 0.08" (2mm) of snow.

How cold is the water in April in Herald Harbor?

In Herald Harbor, Maryland, the average seawater temperature in April is 50.5°F (10.3°C). Swimming in 50.5°F (10.3°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

What is the average length of the day in April in Herald Harbor?

In April, the average length of the day in Herald Harbor, Maryland, is 13.3h.

How long on average sun shines in April in Herald Harbor?

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

What is the UV index reading in April in Herald Harbor?

In Herald Harbor, the average daily maximum UV index in April is 4. A UV Index of 3 to 5 symbolizes a moderate health threat from unsafe exposure to the Sun's UV rays.

Average temperature in April
Herald Harbor, MD

Average temperature in April - Herald Harbor, MD
  • Average high temperature in April: 62.8°F

The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (39.6°F).

  • Average low temperature in April: 47.5°F

The month with the highest average low temperature is July (70.7°F).
The coldest month (with the lowest average low temperature) is January (28.4°F).

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Average pressure in April
Herald Harbor, MD

Average pressure in April - Herald Harbor, MD
  • Average pressure in April: 29.99"

The month with the highest atmospheric pressure is November (30.14").
The month with the lowest atmospheric pressure is June (29.94").

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Average wind speed in April
Herald Harbor, MD

Average wind speed in April - Herald Harbor, MD
  • Average wind speed in April: 9.1mph

The windiest month (with the highest average wind speed) is March (9.4mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).

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Average humidity in April
Herald Harbor, MD

Average humidity in April - Herald Harbor, 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%).

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Average rainfall in April
Herald Harbor, MD

Average rainfall in April - Herald Harbor, MD
  • Average rainfall in April: 2.6"

The wettest month (with the highest rainfall) is August (3.54").
The driest month (with the least rainfall) is September (1.89").

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Average rainfall days in April
Herald Harbor, MD

Average rainfall days in April - Herald Harbor, MD
  • Average rainfall days in April: 15.7 days

The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is November (9.4 days).

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Average snowfall in April
Herald Harbor, MD

Average snowfall in April - Herald Harbor, MD
  • Average snowfall in April: 0.08"

The month with the highest snowfall is January (2.05").
Months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in April
Herald Harbor, MD

Average snowfall days in April - Herald Harbor, MD
  • Average snowfall days in April: 0.1 days

The month with the highest number of snowfall days is January (4.4 days).
Months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average sea temperature in April
Herald Harbor, MD

Average sea temperature in April - Herald Harbor, MD
  • Average sea temperature in April: 50.5°F

The best month for swimming (with the highest average sea temperature) is August (77.5°F).
The coldest month (with the lowest average sea temperature) is February (44.5°F).

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Average daylight in April /
Average sunshine in April
Herald Harbor, MD

Average daylight in April / Average sunshine in April - Herald Harbor, 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: 10.9h).
The month with the least sunshine is February (Average sunshine: 5.1h).

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Average sunshine days in April
Herald Harbor, MD

Average sunshine days in April - Herald Harbor, MD
  • Average sunshine days in April: 12.8 days

The month with the most sunshine days is November (18.7 days).
The month with the least sunshine days is May (10.8 days).

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Average UV index in April
Herald Harbor, MD

Average UV index in April - Herald Harbor, 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, November and December (UV index 2).

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Average cloud cover in April
Herald Harbor, MD

Average cloud cover in April - Herald Harbor, MD
  • Average cloud cover in April: 41

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 April
Herald Harbor, MD

Average visibility in April - Herald Harbor, MD
  • Average visibility in April: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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