Contents
- Weather in April
- Frequently asked questions
- Average temperature in April
- Average pressure in April
- Average wind speed in April
- Average humidity in April
- Average rainfall in April
- Average rainfall days in April
- Average snowfall in April
- Average snowfall days in April
- Average sea temperature in April
- Average daylight in April
- Average sunshine in April
- Average sunshine days in April
- Average UV index in April
- Average cloud cover in April
- Average visibility in April
Weather in April
Temperature
The transition from March to April brings a temperature rise, with average high-temperatures increasing from a cool 50°F (10°C) to an enjoyable 61.9°F (16.6°C). April generally records an average low-temperature of 45°F (7.2°C).Humidity
The least humid month in Charlestown is April, with an average relative humidity of 74%.Rainfall
In April, the rain falls for 14.4 days. Throughout April, 2.17" (55mm) of precipitation is accumulated. In Charlestown, Maryland, during the entire year, the rain falls for 150.3 days and collects up to 29.25" (743mm) of precipitation.Snowfall
April, June through October are months without snowfall.Ocean temperature
In Charlestown, in April, the average water temperature is 47.7°F (8.7°C).Note: Diving into 47.7°F (8.7°C) when it's under 50°F (10°C) can cause immediate cold shock symptoms, marked by hyperventilation.
Daylight
In Charlestown, the average length of the day in April is 13h and 16min.On the first day of April, sunrise is at 6:46 am and sunset at 7:28 pm. On the last day of the month, sunrise is at 6:04 am and sunset at 7:57 pm EDT.
Sunshine
The average sunshine in April in Charlestown is 8.5h.UV index
The average daily maximum UV index in April is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for the average person.Note: The daily high UV index of 4 in April translates into this advice:
Prioritize safety - Suggestions to prevent sun damage are offered. Direct Sun exposure should be minimized especially during midday when radiation is most intense. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in April?
What is the least humid month?
What is the average humidity in April in Charlestown?
How much does it rain in April?
When it does not snow?
Does it snow in April?
What is the ocean temperature in April?
What is the average length of the day in April?
What time are sunrise and sunset in April?
How many hours of sunshine does Charlestown have in April?
What is the UV index reading in April?
Average temperature in April
Charlestown, MD
- Average high temperature in April: 61.9°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 (37.9°F).
- Average low temperature in April: 45°F
The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).
Average pressure in April
Charlestown, 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
Charlestown, MD
- Average wind speed in April: 8.8mph
The windiest months (with the highest average wind speed) are February and March (8.9mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in April
Charlestown, MD
- Average humidity in April: 74%
The months with the highest relative humidity are May and June (79%).
The month with the lowest relative humidity is April (74%).
Average rainfall in April
Charlestown, MD
- Average rainfall in April: 2.17"
The wettest month (with the highest rainfall) is August (3.86").
The driest month (with the least rainfall) is January (1.85").
Average rainfall days in April
Charlestown, MD
- Average rainfall days in April: 14.4 days
The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is January (7.8 days).
Average snowfall in April
Charlestown, MD
- Average snowfall in April: 0"
The month with the highest snowfall is January (2.24").
The months with the least snowfall are April, June, July, August, September and October (0").
Average snowfall days in April
Charlestown, MD
- Average snowfall days in April: 0 days
The month with the highest number of snowfall days is January (4.4 days).
The months with the least snowfall days are April, June, July, August, September and October (0 days).
Average sea temperature in April
Charlestown, MD
- Average sea temperature in April: 47.6°F
The best month for swimming (with the highest average sea temperature) is August (76.3°F).
The coldest month (with the lowest average sea temperature) is February (40.9°F).
Average daylight in April /
Average sunshine in April
Charlestown, MD
- Average daylight in April: 13h 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 24min).
- Average sunshine in April: 8h and 3min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).
Average sunshine days in April
Charlestown, MD
- Average sunshine days in April: 14.3 days
The month with the most sunshine days is November (20.4 days).
The month with the least sunshine days is July (11.6 days).
Average UV index in April
Charlestown, 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, November and December (UV index 2).
Average cloud cover in April
Charlestown, MD
- Average cloud cover in April: 43
The months with the most cloud cover are February and March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in April
Charlestown, MD
- Average visibility in April: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are May and September (5mi).
Charlestown, Maryland, USA
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