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 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
In Chelmsford, the onset of April comes with an increased average high-temperature, moving from March's cold 42.4°F (5.8°C) to a refreshing 55.4°F (13°C). The nighttime temperature in Chelmsford, Massachusetts, during April, averages of 39°F (3.9°C).Humidity
With an average relative humidity of 70%, April is the least humid month.Rainfall
In April, in Chelmsford, Massachusetts, the rain falls for 13.9 days. Throughout April, 2.6" (66mm) of precipitation is accumulated. Throughout the year, in Chelmsford, there are 145.9 rainfall days, and 27.48" (698mm) of precipitation is accumulated.Snowfall
Months with snowfall in Chelmsford are January through May, October through December. In Chelmsford, in April, during 1.5 snowfall days, 1.73" (44mm) of snow is typically accumulated. Throughout the year, in Chelmsford, Massachusetts, there are 32.6 snowfall days, and 21.61" (549mm) of snow is accumulated.Daylight
In Chelmsford, the average length of the day in April is 13h and 25min.On the first day of the month, sunrise is at 6:26 am and sunset at 7:11 pm. On the last day of April, sunrise is at 5:40 am and sunset at 7:44 pm EDT.
Sunshine
In April, the average sunshine is 8.3h.UV index
In April, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the average person.Note: In April, the maximum UV index of 3 translates into these guidelines:
Exercise caution. Those with pale skin may experience burns in less than half an hour. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
Frequently asked questions
What is the average April temperature in Chelmsford?
What is the least humid month in Chelmsford?
What is the average humidity in April in Chelmsford?
How many days does it rain in April in Chelmsford?
How much does it snow in Chelmsford in April?
What is the average length of the day in April in Chelmsford?
What time are sunrise and sunset in April in Chelmsford?
How long on average sun shines in April in Chelmsford?
How high is the UV index in April in Chelmsford?
Average temperature in April
Chelmsford, MA
- Average high temperature in April: 55.4°F
The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is January (32.5°F).
- Average low temperature in April: 39°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (19.9°F).
Average pressure in April
Chelmsford, 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
Chelmsford, MA
- Average wind speed in April: 7.9mph
The windiest month (with the highest average wind speed) is January (8.8mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).
Average humidity in April
Chelmsford, MA
- Average humidity in April: 70%
The month with the highest relative humidity is February (80%).
The month with the lowest relative humidity is April (70%).
Average rainfall in April
Chelmsford, MA
- Average rainfall in April: 2.6"
The wettest month (with the highest rainfall) is December (2.87").
The driest month (with the least rainfall) is September (1.46").
Average rainfall days in April
Chelmsford, MA
- Average rainfall days in April: 13.9 days
The month with the highest number of rainy days is May (15.6 days).
The month with the least rainy days is February (6.9 days).
Average snowfall in April
Chelmsford, MA
- Average snowfall in April: 1.73"
The month with the highest snowfall is February (5.98").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in April
Chelmsford, MA
- Average snowfall days in April: 1.5 days
The month with the highest number of snowfall days is February (8.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in April /
Average sunshine in April
Chelmsford, MA
- Average daylight in April: 13h and 2min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in April: 8h and 2min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in April
Chelmsford, MA
- Average sunshine days in April: 13.7 days
The month with the most sunshine days is November (17.4 days).
The month with the least sunshine days is May (13.6 days).
Average UV index in April
Chelmsford, 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
Chelmsford, MA
- Average cloud cover in April: 46
The month with the most cloud cover is March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in April
Chelmsford, MA
- Average visibility in April: 6mi
The months with the highest visibility are January, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is February (5mi).
Chelmsford, Massachusetts, USA
Weather forecast for your location
2. Allow the app to use your location
