April weather forecastWatertown, MA
April
Weather in April
April in Watertown, Massachusetts, is a mild spring month, with an average temperature fluctuating between 39.9°F (4.4°C) and 55.9°F (13.3°C).Temperature
The shift into April is characterized by a rise in the average high-temperature, transitioning from March's chilly 43.3°F (6.3°C) to a mild 55.9°F (13.3°C). Throughout April, Watertown encounters an average temperature drop to a wintry 39.9°F (4.4°C).Humidity
With an average relative humidity of 70%, April is the least humid month.Rainfall
In Watertown, during April, the rain falls for 9 days and regularly aggregates up to 0.63" (16mm) of precipitation. Throughout the year, there are 85.9 rainfall days, and 5.87" (149mm) of precipitation is accumulated.Snowfall
January through May, November and December are months with snowfall. In Watertown, in April, during 0.9 snowfall days, 0.08" (2mm) of snow is typically accumulated. Throughout the year, there are 18.8 snowfall days, and 3.15" (80mm) of snow is accumulated.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 7:11 pm. On the last day of April, sunrise is at 5:40 am and sunset at 7:43 pm EDT.
Sunshine
In April, the average sunshine is 8.2h.UV index
In April, the average daily maximum UV index is 3. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: In April, the maximum UV index of 3 suggests these recommendations:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. When the Sun is at its strongest around midday, find shade and limit exposure. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Watertown, MA
- Average high temperature in April: 55.9°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 (33.6°F).
- Average low temperature in April: 39.9°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (21.7°F).
Average pressure in April
Watertown, MA
- Average pressure in April: 29.97"Hg
The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in April
Watertown, MA
- Average wind speed in April: 8.3mph
The windiest month (with the highest average wind speed) is January (9.1mph).
The calmest month (with the lowest average wind speed) is August (5.8mph).
Average humidity in April
Watertown, MA
- Average humidity in April: 70%
The month with the highest relative humidity is February (78%).
The month with the lowest relative humidity is April (70%).
Average rainfall in April
Watertown, MA
- Average rainfall in April: 0.63"
The wettest month (with the highest rainfall) is November (0.67").
The driest month (with the least rainfall) is September (0.24").
Average rainfall days in April
Watertown, MA
- Average rainfall days in April: 9 days
The month with the highest number of rainy days is July (10.2 days).
The month with the least rainy days is February (4.1 days).
Average snowfall in April
Watertown, MA
- Average snowfall in April: 0.08"
The month with the highest snowfall is December (0.91").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in April
Watertown, MA
- Average snowfall days in April: 0.9 days
The month with the highest number of snowfall days is January (4.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in April /
Average sunshine in April
Watertown, 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 12min
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 42min).
Average sunshine days in April
Watertown, MA
- Average sunshine days in April: 18.3 days
The months with the most sunshine days are January and November (22.5 days).
The month with the least sunshine days is June (17.5 days).
Average UV index in April
Watertown, 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
Watertown, 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
Watertown, 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).
