Last updated: February 24, 2025
May in Hyannis, United States brings a delightful transition into warmer weather, with temperatures ranging from a maximum of 21°C (70°F) to a minimum of 5°C (41°F). The average temperature settles at 12°C (53°F), offering a comfortable climate for outdoor activities. However, visitors should be prepared for some rain, as the month experiences 119 mm (4.7 inches) of precipitation over 12 days, contributing to a humidity level of 75%. This mix of pleasant warmth and occasional showers paints a picturesque springtime landscape, ideal for exploring the beauty of Cape Cod.
As May arrives in Hyannis, the chill of winter gives way to more inviting temperatures, making it a delightful transition into spring. The month begins with a minimum of 5°C (41°F), gradually warming up to a pleasant 21°C (70°F) at its peak. With an average temperature of 12°C (53°F), May offers a significant jump from the cooler months, showcasing an inviting climate for outdoor activities and exploration. This upward trend in temperatures is a clear indication of the season's shift, as Hyannis shakes off the remnants of winter and prepares for the warmth of summer. The gradual rise from the previous months' averages creates an ambiance that encourages both locals and visitors to savor the emerging beauty of the season.
In Hyannis, May brings a moderate precipitation total of 119 mm (4.7 in), making it a key month in the spring rainfall pattern. Rain falls on an average of 12 days, hinting at the transition from the wetter spring months to the drier summer period. This amount is slightly less than the 137 mm (5.4 in) recorded in April but consistent with the overall downward trend in precipitation observed as the year progresses. As May wraps up, residents and visitors can expect a lively landscape, nurtured by the showers of early spring while preparing for the drier days of summer ahead.
As May arrives in Hyannis, the humidity begins to show a gradual decline, dropping to 75%, a slight improvement from the higher levels seen in the earlier months. This trend of decreasing humidity is a welcoming shift after the winter months, where January and February remain consistently high at 84%. By April, residents can already feel a hint of relief with 79% humidity, signaling that spring is in full swing. The transition into summer sees humidity levels hovering around the mid-70s, with June rising slightly to 78%. Overall, May's humidity provides a comfortable atmosphere that enhances the charm of this coastal paradise, making it an ideal time for outdoor activities.
In May, Hyannis experiences a significant climb in the UV Index, reaching 9, which falls into the very high exposure category. With a burn time of just 15 minutes, it's crucial to prioritize sun safety and apply sunscreen regularly. This upward trend from earlier months underscores the increasing intensity of UV rays as spring transitions into summer. Compared to April's UV Index of 8, the heightened levels in May signal that outdoor enthusiasts should take extra precautions. As the months progress, the UV Index remains consistently high through June and July, emphasizing the need for vigilance against UV exposure. For more insights on UV levels year-round, visit Hyannis UV Index.
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As spring transitions into summer, May shines brightly in Hyannis, offering 298 hours of glorious sunshine that tantalizes locals and visitors alike. This vibrant month not only continues the upward trend established in April but also sets the stage for even sunnier days ahead, with June boasting a remarkable 326 hours. Compared to the dreary winter months, where sunshine dips as low as 142 hours in January, May is a joyous explosion of warmth and light. By this time of year, the days are noticeably longer, making outdoor activities more enticing and paving the way for a memorable summer experience in this coastal haven. Such an increase in sunshine not only lifts spirits but also invites exploration, leisure, and the quintessential enjoyment of Hyannis's beautiful landscapes.
In Hyannis, the likelihood of sunny weather in May stands at 41%, a figure that aligns closely with the 43% chance noted in April and reflects a slight dip as summer approaches. This month ultimately follows a promising March, where the chance of sun peaked at 57%, suggesting the tail end of spring often brings more variability. As temperatures rise into June, the chance of sunshine slightly decreases to 38%, creating a pattern where the early months of the year generally offer lower probabilities of sun compared to the transitional spring period. Overall, while May may not boast the highest rates of sun, it remains a steady and pleasant month for outdoor activities in Hyannis.
As May unfolds in Hyannis, the length of daylight begins to peak, with 14 hours of sunlight enriching the days. This month marks a significant transition, as the sun rises earlier and sets later compared to the preceding months. Starting from a modest 9 hours in January, daylight gradually increases, revealing a consistent upward trend through February, March, and April. May's generous sunlight not only enhances outdoor activities but also hints at the approaching summer, where the longest days of June follow with 15 hours of daylight. Interestingly, after May, the gradual decline begins, with daylight decreasing throughout the summer and into autumn. Overall, May serves as a vibrant highlight in Hyannis' daylight journey, balancing the long winter nights with a radiant promise of summer.
In Hyannis, May ushers in a gentle breeze, with an average wind speed of 5.9 m/s (approximately 13 mph), marking a noticeable decrease from the brisk winds of earlier months. After experiencing stronger gusts throughout the winter and early spring, May offers a transition to milder conditions, setting the stage for the upcoming summer. The trend reveals a gradual decline in wind speed as the year progresses, with July and August being the calmest months on record. However, as September rolls in, the winds pick up again, hinting at the seasonal shifts that characterize life on the coast. Overall, May's moderate breezes are a refreshing change, inviting both relaxation and revitalization amid the promise of summer’s arrival.
The weather in Hyannis changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of May's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Hyannis and find detailed weather information for every month.
May and January present starkly contrasting weather conditions. In May, temperatures range from a minimum of 5°C (41°F) to a maximum of 21°C (70°F), with an average of 12°C (53°F), making it a much warmer month overall. However, May experiences higher precipitation with 119 mm (4.7 in) over approximately 12 days, coupled with a humidity level of 75%. In contrast, January is significantly colder, with temperatures varying from a deep minimum of -14°C (6°F) to a maximum of 13°C (55°F) and an average of just 2°C (36°F). While January has less rainfall at 94 mm (3.7 in) over 10 days, the humidity is higher at 84%. For more detailed information, you can check Hyannis weather in January.
When comparing the weather in May and February, it’s clear that May offers much milder temperatures, with minimums around 5°C (41°F) and maximums reaching 21°C (70°F), in contrast to February's chillier conditions, where temperatures can drop to as low as -12°C (10°F). While both months see a similar amount of precipitation, with February slightly higher at 123 mm (4.8 in) compared to May's 119 mm (4.7 in), the humidity in February is notably higher at 84%, making it feel even colder than the stated averages. For a closer look at February weather specifics in Hyannis, you can check Hyannis weather in February. Overall, May presents a much more pleasant climate, ideal for outdoor activities, while February’s weather remains brisk and damp.
In comparing the weather of May and March, it's clear that May experiences significantly milder temperatures, with minimums around 5°C (41°F) and maximums reaching up to 21°C (70°F), compared to March's chilly range of -9°C (16°F) to 13°C (56°F). While both months see similar precipitation levels—119 mm (4.7 in) in May and 118 mm (4.7 in) in March—March has a slightly lower number of rainy days, totaling 10 compared to May's 12. Additionally, March tends to have higher humidity at 82%, which can contribute to a colder and more biting feel, whereas May's humidity is a bit lower at 75%, making the warmer temperatures feel more comfortable. For more detailed insights into March weather specifically, you can check out Hyannis weather in March.
In comparing the weather between April and May, May generally offers warmer temperatures, with an average of 12°C (53°F) compared to April's average of just 7°C (46°F). The maximum temperatures also reflect this trend, reaching up to 21°C (70°F) in May while only peaking at 16°C (60°F) in April. However, May does see slightly more precipitation, totaling 119 mm (4.7 in) over 12 days, compared to April's 137 mm (5.4 in) over 13 days. Humidity levels are relatively close, with May at 75% and April at 79%. For a closer look at the weather specifics for April, you can refer to Hyannis weather in April.
May typically features cooler temperatures, with a minimum of 5°C (41°F) and an average of 12°C (53°F), while June sees a notable increase, boasting a minimum of 10°C (51°F) and an average of 17°C (63°F). The maximum temperatures also rise, reaching 21°C (70°F) in May compared to 24°C (76°F) in June. Although May experiences more precipitation, totaling 119 mm (4.7 in) over 12 days, June has less rain at 91 mm (3.6 in) across 10 days. Additionally, humidity levels are slightly higher in June at 78% compared to May's 75%, indicating a more humid atmosphere as summer approaches. For more detailed conditions, visit Hyannis weather in June.
In comparing the weather between May and July, it's clear that July is significantly warmer, with average temperatures rising from 12°C (53°F) in May to 21°C (71°F) in July. The maximum temperature in July reaches a pleasant 29°C (84°F), compared to May's peak of 21°C (70°F). Precipitation decreases in July to 83mm (3.3 in) over just 9 days, while May sees a wetter pattern with 119mm (4.7 in) across 12 days. Humidity remains fairly consistent, slightly rising from 75% in May to 76% in July. For more detailed insights, you can check Hyannis weather in July.
May and August present quite distinct weather profiles. In May, temperatures range from a chilly minimum of 5°C (41°F) to a pleasant maximum of 21°C (70°F), with an average of 12°C (53°F). The month experiences significant rainfall, totaling 119 mm (4.7 in) across 12 days, coupled with a humidity level of 75%. In contrast, August warms up considerably, featuring a minimum temperature of 16°C (61°F) and peaking at 27°C (81°F), with an average of 22°C (72°F). Rainfall in August is lighter at 82 mm (3.2 in) over just 8 days, while humidity remains similar at 76%. For more details, you can check Hyannis weather in August.
May and September present contrasting seasonal climates, each characterized by unique temperatures and weather conditions. In May, temperatures range from a minimum of 5°C (41°F) to a maximum of 21°C (70°F), with an average of 12°C (53°F). The month experiences about 119 mm (4.7 in) of precipitation over 12 days, alongside a humidity level of 75%. In contrast, September is warmer, with temperatures averaging between a minimum of 13°C (56°F) and a maximum of 25°C (78°F), resulting in an average of 19°C (67°F). Although September features slightly less precipitation at 118 mm (4.7 in) across just 10 days, humidity remains consistent at 75%. For more detailed information, you can refer to Hyannis weather in September.
May and October present mild temperatures, with average highs reaching 21°C (70°F) in May and slightly higher at 22°C (72°F) in October. However, October tends to be wetter, receiving approximately 175 mm (6.9 in) of precipitation compared to May's 119 mm (4.7 in) over the same number of days (12). Humidity levels remain consistent at 75% for both months, contributing to a similar feel in the air. For more specific details about October weather in Hyannis, check out Hyannis weather in October.
May and November exhibit notable differences in weather patterns. In May, temperatures range from a mild minimum of 5°C (41°F) to a pleasant maximum of 21°C (70°F), with an average of 12°C (53°F). The month experiences around 119 mm (4.7 in) of precipitation over 12 days, accompanied by a humidity level of 75%. In contrast, November sees cooler temperatures, with a minimum of -6°C (21°F) and a maximum of 19°C (66°F), averaging 9°C (48°F). Although November has slightly less precipitation at 102 mm (4.0 in) over 10 days, the humidity rises to 80%. For more details on November's weather, you can visit Hyannis weather in November.
May and December present contrasting weather conditions. In May, temperatures range from a minimum of 5°C (41°F) to a pleasant average of 12°C (53°F), peaking at 21°C (70°F). This month is characterized by significant rainfall, totaling 119 mm (4.7 in) over about 12 days, with humidity around 75%. In stark contrast, December offers a cooler climate, with temperatures dipping to a minimum of -12°C (11°F) and averaging just 4°C (40°F), while reaching a maximum of 15°C (60°F). Precipitation in December is slightly higher at 136 mm (5.4 in), also over 12 days, but the humidity increases to 80%. For more detailed insights on December weather, you can visit Hyannis weather in December.
As May ushers in the warmth of spring in Hyannis, it stands out from the chillier months preceding it. With average temperatures climbing to a pleasant 12°C (53°F), the town experiences a refreshing shift that attracts both locals and visitors alike. Although precipitation remains notable, with around 12 days of rain, the overall atmosphere is lively and vibrant. The humidity level at 75% adds a touch of tropical feel, making the air feel fresh yet slightly damp. For those looking to enjoy Hyannis' beauty, May serves as a lovely transition month, setting the stage for the summer to come. Discover more about what to expect throughout the year at Hyannis Climate.