April Weather in Boston, United States

Last updated: February 24, 2025

April in Boston showcases a dynamic transition as spring unfolds, with temperatures ranging from a brisk -2°C (28°F) at night to a pleasant 27°C (81°F) during the day. The average temperature sits at a refreshing 9°C (48°F), inviting residents and visitors to embrace the budding season. However, the month often comes with its fair share of rain, featuring 135 mm (5.3 in) of precipitation spread across 13 days, resulting in a humidity level of 80% that can make the air feel quite heavy. Despite the mixed weather, April is a time of renewal in Boston, as the city shakes off winter and gears up for brighter days ahead.

April Temperature in Boston

April marks a notable transition in Boston's climate, as the city shakes off the lingering chill of winter. With minimum temperatures hovering around -2°C (28°F) and an average reaching 9°C (48°F), Bostonians begin to welcome the warmth of spring. The flirtation with higher maximums—peaking at a stunning 27°C (81°F)—provides a refreshing contrast to the colder months preceding it. This trend not only invites outdoor activities but also hints at the blossoming of nature, making April an exhilarating time for residents to step outside and embrace the season’s vibrant energy. As the temperatures rise, the city comes alive, setting the stage for the summer warmth that lies ahead.

April Weather in Boston: Daily Temperature Highs, Lows, and Averages

The chart illustrates April temperature patterns in Boston, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec323438485767737366574436
Data source: Temperature data for Boston generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

April Precipitation in Boston

April in Boston is a month of notable transition, as it marks the peak of springtime precipitation. With an average rainfall of 135 mm (5.3 in) over 13 days, this month sees a significant uptick in moisture compared to the preceding months. Following a gradual increase from 79 mm in January to 102 mm in March, April's rainfall represents a striking increase, suggesting a shift towards the wetter conditions typical of spring. This spike not only fills the rivers and lakes, invigorating the city’s lush landscapes, but also sets the stage for the warmer, sunnier days of May. Despite the abundance of rain, April's showers often bring a refreshing vibrancy to Boston, making it a beautiful time for nature lovers and urban explorers alike.

April Precipitation Trends in Boston

The chart displays monthly precipitation patterns in Boston, with values for each month alongside April's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how April's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec799710213594861157692149100125
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Boston

As April settles in Boston, the city experiences a notable shift in humidity, dipping to 80% from March's 82%. This marks the beginning of a gradual decline in moisture levels as the spring season progresses. With each passing month, humidity continues to drop, reaching a low of 67% by July. This trend illustrates the transition from the winter's dampness, characterized by high humidity levels peaking at 86% in January, towards the more comfortable, drier conditions of late summer. April's relatively milder humidity is a refreshing change, hinting at the upcoming warmth while still carrying some remnants of the earlier cool, moist months.

April Average Humidity in Boston

This chart illustrates the average monthly humidity levels in Boston, with April's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how April's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec86%84%82%80%72%72%67%66%71%79%84%81%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Boston

As April arrives in Boston, the UV Index experiences a significant surge, jumping to 8, indicating a very high exposure category, with a burn time reduced to just 15 minutes. This marks a noticeable shift from the more moderate levels seen in the winter and early spring months, where the index hovered around 3 to 5. With the intensifying sunlight of April, it's essential for residents and visitors alike to adapt their sun protection strategies. As the month unfolds, those venturing outdoors should be particularly mindful, as the UV Index will continue to peak in May and June, emphasizing the need for vigilance against skin damage. For more detailed insights on UV levels throughout the year, check out the Boston UV Index.

Maximum UV Index Levels in Boston for April

The chart shows the monthly maximum UV Index (UVI) for Boston in April, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec3558910997642
Data source: Boston April UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

April Sunshine in Boston

April brings a delightful burst of sunshine to Boston, with 240 hours of bright light illuminating the city's vibrant atmosphere. Following a gradual increase from winter's 152 hours in January and 188 hours in February, March sets the stage for spring with 253 hours of sunshine. As April unfolds, it continues this upward trend, marking a significant leap into the sunnier days that lead into May, which boasts an impressive 289 hours. This month not only bridges the gap between the cool whispers of early spring and the warmth of the approaching summer but also signifies the city's transition into longer days and blossoming landscapes, preparing residents and visitors alike for the sunnier months ahead.

Monthly Sunshine Duration in Boston: April Highlighted

The April sunshine duration represents the total number of hours Boston experiences direct sunlight during the month of April, excluding cloudy or obstructed periods. This chart compares the sunshine duration of April with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec152h188h253h240h289h327h334h327h278h221h201h178h
Data source: Boston April Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Boston During April

In April, Boston sees a 42% chance of sunny weather, reflecting a slight drop from the previous month’s 61% in March. This trend illustrates the city's transition from the brighter days of early spring to the more variable weather patterns of late spring. While April's sunshine can be sporadic, it remains relatively consistent compared to the surrounding months, with May and June showing even lower probabilities at 38% and 39%, respectively. Overall, despite the fluctuation, April still offers a breath of fresh air after the winter months, hinting at the promise of sunnier days ahead as the season progresses.

Percentage of Sunny Days in April in Boston

The chart illustrates the percentage of sunny days in Boston throughout the year, with April highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Boston experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec44%32%61%42%38%40%33%29%44%40%55%33%
Data source: Boston April chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Boston in April

As April unfolds in Boston, the city basks in an invigorating 13 hours of daylight, marking a significant increase from the 11 hours of March. This upward trend in daylight signifies the arrival of spring, when days grow longer and the natural world awakens from winter's slumber. Following April, May continues this progression with 14 hours, peaking in June at 15 hours before gradually tapering off as summer transitions into autumn. The diminishing daylight during the latter part of the year emphasizes the cyclical nature of seasons, with November and December settling back to 9 hours as winter approaches. This rhythm of increasing and decreasing daylight not only highlights the changing seasons but also invites residents to embrace the beauty and vitality of springtime in Boston.

Average Daylight Hours in Boston for April

The chart illustrates the variation in daylight duration in Boston throughout the year, with April highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 28m10h 34m11h 57m13h 23m14h 36m15h 12m14h 53m13h 48m12h 25m11h9h 45m9h 7m
Data source: Boston daylight hours, calculated by summing the hours between sunrise and sunset for each day.

April Winds in Boston

In April, Boston experiences a gentle breeze with an average wind speed of 4.2 m/s (9 mph), slightly lower than the preceding months of March, which sees a brisker pace at 4.7 m/s (11 mph). As spring unfolds, the wind begins to mellow, paving the way for the warmer months ahead. Notably, April's winds are still robust compared to the summer lull, where speeds dip to their annual lows in July and August, averaging around 3.2 m/s (7 mph) and 3.1 m/s (7 mph) respectively. This trend of decreasing wind speeds towards summer suggests a calm before the vibrant bustle of outdoor activities, capturing the essence of a city slowly awakening from its winter slumber.

Average April Wind Speed in Boston

The chart displays monthly wind speed patterns in Boston, with values for each month shown alongside April's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how April's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec4.44.34.74.2 m/s3.93.73.23.13.74.14.14.1
Data source: Boston April wind data, generated using information from the Copernicus Climate Change Service.

How April Weather in Boston Compares to Other Months

The weather in Boston changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of April's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Boston and find detailed weather information for every month.

When comparing the weather in April and January, significant differences are evident. January is much colder, with average temperatures hovering around 0°C (32°F) and a minimum of -19°C (-3°F), while April enjoys a milder average of 9°C (48°F) and a maximum reaching 27°C (81°F). Additionally, January experiences less precipitation, with 79 mm (3.1 in) over 9 days compared to April's 135 mm (5.3 in) spread across 13 days. Both months have high humidity levels, with January at 86% and April slightly lower at 80%. For a detailed look at January's climate, you can check Boston weather in January.

April's weather shows a significant warming trend compared to February, with average temperatures rising from February's frigid 1°C (34°F) to a more pleasant 9°C (48°F). The minimum temperature in April, although still chilly at -2°C (28°F), is considerably milder than February's low of -16°C (4°F). Additionally, while April experiences more rain with 135 mm (5.3 in) over 13 days, February is slightly drier with 97 mm (3.8 in) across 10 days. Humidity levels remain relatively similar, with April at 80% and February at 84%. For a closer look at February's colder conditions, check out Boston weather in February.

April generally experiences milder temperatures compared to March, with average highs soaring to 27°C (81°F), while March sees a maximum of only 20°C (68°F). The minimum temperatures in April range from -2°C (28°F), which is a notable improvement from March's colder minimum of -12°C (11°F). Additionally, April is wetter, with 135 mm (5.3 in) of precipitation over 13 days, compared to March's 102 mm (4.0 in) over 10 days. Despite this increase in rainfall, the humidity levels remain relatively similar, with March at 82% and April at 80%. For a more detailed look at the weather patterns, check out Boston weather in March.

In comparing the weather of April and May, we observe a noticeable shift in temperatures and precipitation levels. April experiences a wider temperature range with lows dipping to -2°C (28°F) and highs reaching up to 27°C (81°F), resulting in an average temperature of 9°C (48°F). In contrast, May's temperatures are more consistently warmer, with a minimum of 3°C (37°F), an average of 14°C (58°F), and a maximum rising to 31°C (89°F). Additionally, May sees less precipitation, totaling 94 mm (3.7 in) over 12 days, compared to April's 135 mm (5.3 in) over 13 days. The humidity also decreases from 80% in April to 72% in May, making the latter month feel more comfortable. For more specific details on May's weather, you can check Boston weather in May.

April and June present quite contrasting weather patterns. In April, temperatures range significantly, with a minimum of -2°C (28°F) and a maximum of 27°C (81°F), and an average of 9°C (48°F). The month sees considerable precipitation, totaling 135 mm (5.3 in) over 13 days, coupled with high humidity levels at 80%. In contrast, June enjoys a much warmer climate, with minimum temperatures at 8°C (47°F), averages of 19°C (67°F), and maximums reaching 33°C (92°F). Precipitation is lighter in June, with 86 mm (3.4 in) spread across 10 days, and humidity drops to a more comfortable 72%. For a more detailed look at what to expect, check out Boston weather in June.

April and July present contrasting weather conditions. In April, temperatures can range from a brisk minimum of -2°C (28°F) to a pleasant maximum of 27°C (81°F), with an average of 9°C (48°F). The month sees considerable precipitation, averaging 135 mm (5.3 in) over 13 days, coupled with high humidity levels at 80%. In comparison, July experiences a milder climate with temperatures ranging from a minimum of 14°C (57°F) to a maximum of 34°C (94°F), averaging 23°C (73°F). Precipitation decreases slightly to 115 mm (4.5 in) over 12 days, and the humidity drops to a more comfortable 67%. For more details on the weather patterns specific to Boston, you can check Boston weather in July.

April and August present contrasting weather experiences. In April, temperatures fluctuate significantly, ranging from a chilly minimum of -2°C (28°F) to a comfortable maximum of 27°C (81°F), with an average of 9°C (48°F). The month is characterized by relatively high precipitation, with about 135 mm (5.3 in) falling over 13 days, alongside a humidity level of 80%. Conversely, August offers a warmer climate, with minimum temperatures starting at 13°C (56°F) and peaking at a maximum of 33°C (92°F), averaging 23°C (73°F). The precipitation in August is lighter, totaling 76 mm (3.0 in) over just 10 days, and the humidity is lower at 66%. For more insights into the warm and vibrant conditions typical of the month, check out Boston weather in August.

April and September showcase distinct weather patterns, reflecting the transition from spring to fall. In April, temperatures range from a chilly minimum of -2°C (28°F) to a pleasant maximum of 27°C (81°F), with an average of 9°C (48°F). The month typically experiences 135 mm (5.3 in) of precipitation over 13 days, leading to a higher humidity level of 80%. In contrast, September offers a milder climate with temperatures starting at 7°C (46°F) and reaching up to 33°C (92°F), averaging 19°C (67°F). With only 92 mm (3.6 in) of precipitation across 8 days, the humidity decreases to 71%. For more detailed insights into September weather, check out Boston weather in September.

April and October present contrasting yet comparable weather patterns. In April, temperatures range from a chilly minimum of -2°C (28°F) to a comfortable maximum of 27°C (81°F), with an average of 9°C (48°F). The month averages 135 mm (5.3 in) of precipitation over 13 days, coupled with high humidity at 80%. In contrast, October features slightly milder temperatures, with a minimum of 0°C (33°F) and an average of 14°C (57°F), but still reaching a maximum of 27°C (81°F). Precipitation slightly increases to 149 mm (5.9 in) over 12 days, with humidity decreasing to 78%. For a closer look at what to expect, check out Boston weather in October.

April and November exhibit notable differences in weather patterns. In April, temperatures typically range from a minimum of -2°C (28°F) to a maximum of 27°C (81°F), with an average of 9°C (48°F). This month also sees about 135 mm (5.3 in) of precipitation over approximately 13 days, accompanied by a humidity level of 80%. In contrast, November experiences colder conditions, with temperatures dipping to as low as -10°C (14°F) and peaking at 22°C (72°F), averaging around 7°C (44°F). The month receives slightly less precipitation, about 100 mm (3.9 in) over 10 days, and boasts a marginally higher humidity of 84%. For more detailed information, check out Boston weather in November.

In April, temperatures range from a chilly -2°C (28°F) to a warm 27°C (81°F), with an average of 9°C (48°F). The month experiences quite a bit of precipitation, totaling 135 mm (5.3 in) over about 13 days, with humidity levels around 80%. In contrast, December sees colder conditions, with temperatures varying from -16°C (3°F) at night to a maximum of 17°C (62°F) during the day, resulting in an average temperature of 2°C (36°F). Precipitation is slightly lower at 124 mm (4.9 in) over 10 days, and humidity is marginally higher at 81%. For more details on winter weather, check out Boston weather in December.

Compare Boston's Climate with Cities Worldwide

Conclusion: What to Expect From April Weather in Boston

As April unfolds in Boston, the city experiences a refreshing transition from the chill of winter to the budding warmth of spring. While temperatures can soar to a pleasant 27°C (81°F), they can just as easily dip to a brisk -2°C (28°F), showcasing the unpredictable nature of early spring. This month also sees significant precipitation, with 13 days of rain contributing to a total of 135 mm (5.3 in), making it one of the wetter months. With humidity hovering around 80%, the air can feel quite heavy, setting it apart from the drier and warmer summer months ahead. For a deeper understanding of how April weather fits into the broader climate patterns, explore Boston Climate.