April weather forecastCharlestown, MA
April
Weather in April
April is a mild spring month in Charlestown, Massachusetts, with an average temperature ranging between max 55.6°F (13.1°C) and min 40.1°F (4.5°C).Temperature
April's onset brings a rise in the average high-temperature, moving from a frosty 43.3°F (6.3°C) in March to a mild 55.6°F (13.1°C). The average nighttime temperature lowers to a cold 40.1°F (4.5°C) throughout April.Humidity
With an average relative humidity of 69%, April is the least humid month.Rainfall
In Charlestown, in April, it is raining for 5.9 days, with typically 0.47" (12mm) of accumulated precipitation. Throughout the year, there are 47.8 rainfall days, and 4.13" (105mm) of precipitation is accumulated.Snowfall
January through May, November and December are months with snowfall. In Charlestown, in April, during 0.6 snowfall days, 0.04" (1mm) of snow is typically accumulated. In Charlestown, during the entire year, snow falls for 13.2 days and aggregates up to 2.17" (55mm) of snow.Daylight
The average length of the day in April is 13h and 24min.On the first day of the month, sunrise is at 6:25 am and sunset at 7:10 pm. On the last day of April, sunrise is at 5:39 am and sunset at 7:43 pm EDT.
Sunshine
In Charlestown, the average sunshine in April is 8.1h.UV index
In April, the average daily maximum UV index in Charlestown is 3. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for the average person.Note: In April, the average maximum UV index of 3 translates into the following recommendations:
Adopt protective measures - It is advised to guard against sun damage. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Experience reduced UV exposure by about half when donning a wide-brim hat. Stay alert! Snow's reflective properties can almost double the UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Charlestown, MA
- Average high temperature in April: 55.6°F
The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (33.8°F).
- Average low temperature in April: 40.1°F
The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (22.5°F).
Average pressure in April
Charlestown, MA
- Average pressure in April: 29.97"Hg
The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in April
Charlestown, MA
- Average wind speed in April: 8.5mph
The windiest month (with the highest average wind speed) is January (9.6mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in April
Charlestown, MA
- Average humidity in April: 69%
The month with the highest relative humidity is February (78%).
The month with the lowest relative humidity is April (69%).
Average rainfall in April
Charlestown, MA
- Average rainfall in April: 0.47"
The wettest month (with the highest rainfall) is November (0.55").
The driest month (with the least rainfall) is September (0.12").
Average rainfall days in April
Charlestown, MA
- Average rainfall days in April: 5.9 days
The month with the highest number of rainy days is April (5.9 days).
The months with the least rainy days are January and September (2.9 days).
Average snowfall in April
Charlestown, MA
- Average snowfall in April: 0.04"
The month with the highest snowfall is December (0.71").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in April
Charlestown, MA
- Average snowfall days in April: 0.6 days
The month with the highest number of snowfall days is January (3.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in April /
Average sunshine in April
Charlestown, MA
- Average daylight in April: 13h and 24min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in April: 8h and 6min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in April
Charlestown, MA
- Average sunshine days in April: 23.3 days
The month with the most sunshine days is December (25.5 days).
The month with the least sunshine days is July (22.8 days).
Average UV index in April
Charlestown, MA
- Average UV index in April: 3
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in April
Charlestown, MA
- Average cloud cover in April: 46
The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in April
Charlestown, MA
- 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).
