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
April in Waltham signals a shift in the average high-temperature, moving from March's frosty 43.3°F (6.3°C) to a refreshing 55.9°F (13.3°C). The temperature lowers to an average of 39.7°F (4.3°C) during April nights.Humidity
With an average relative humidity of 70%, April is the least humid month in Waltham.Rainfall
The wettest months in Waltham are April and November, with an average 0.87" (22mm) of rainfall.Snowfall
January through May, November and December are months with snowfall. In Waltham, in April, snow falls for 0.9 days, with typically accumulated 0.16" (4mm) of snow. Throughout the year, there are 19.6 snowfall days, and 4.02" (102mm) of snow is accumulated.Daylight
In April, the average length of the day in Waltham 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, in Waltham, sunrise is at 5:40 am and sunset at 7:43 pm EDT.
Sunshine
The average sunshine in April is 8.2h.UV index
The average daily maximum UV index in April in Waltham is 3. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.Note: A maximum high daily UV index of 3 during April translates into the following directions:
Prioritize safety - Recommendations to avert sunburn are shared. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Be cautious! The UV radiation from the Sun can be magnified almost twofold by snow reflection.
Frequently asked questions
What is the usual temperature for Waltham in April?
What is the least humid month in Waltham?
What is the average humidity in April in Waltham?
What is the rainiest month in Waltham?
How much does it rain in Waltham in April?
How many days does it snow in April in Waltham?
What is the average length of the day in April in Waltham?
What time are sunrise and sunset in April in Waltham?
How long on average sun shines in April in Waltham?
What is the UV index intensity in April in Waltham?
Average temperature in April
Waltham, MA
- Average high temperature in April: 55.9°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (33.3°F).
- Average low temperature in April: 39.7°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).
Average pressure in April
Waltham, 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
Waltham, MA
- Average wind speed in April: 8.2mph
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
Waltham, 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
Waltham, MA
- Average rainfall in April: 0.87"
The wettest months (with the highest rainfall) are April and November (0.87").
The driest month (with the least rainfall) is September (0.35").
Average rainfall days in April
Waltham, MA
- Average rainfall days in April: 11.2 days
The month with the highest number of rainy days is July (12.4 days).
The month with the least rainy days is January (5.3 days).
Average snowfall in April
Waltham, MA
- Average snowfall in April: 0.16"
The month with the highest snowfall is December (1.14").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in April
Waltham, MA
- Average snowfall days in April: 0.9 days
The month with the highest number of snowfall days is February (5.4 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in April /
Average sunshine in April
Waltham, MA
- Average daylight in April: 13h and 2min
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 1min
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
Waltham, MA
- Average sunshine days in April: 16.6 days
The month with the most sunshine days is January (22.2 days).
The month with the least sunshine days is June (15.8 days).
Average UV index in April
Waltham, 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
Waltham, 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
Waltham, 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).
Waltham, Massachusetts, USA
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