Last updated: August 27, 2025
In Sundsvall, Sweden, May brings a delightful transition into warmer weather, with temperatures reaching a maximum of 27°C (81°F) and dipping to a minimum of -4°C (25°F). The month showcases an average temperature of 9°C (48°F), providing a refreshing backdrop for various outdoor activities. Despite experiencing 37 mm (1.5 in) of precipitation over 9 days, the overall climate remains inviting, with humidity levels around 80%. As spring blooms, Sundsvall offers a unique blend of cool mornings and pleasant afternoons, making it a picturesque time to explore this charming Swedish town.
In Sundsvall, Sweden, May marks a significant transition as winter gives way to warmer days. With temperatures ranging from a chilly -4°C (25°F) to a pleasant 27°C (81°F), the month showcases the region's ability to surprise. The average temperature settles at a comfortable 9°C (48°F), hinting at the burgeoning warmth as spring takes full effect. This shift is evident compared to previous months; for instance, April, while warmer than the depths of winter, only reaches an average of 3°C (38°F). As the city emerges from the grips of frosty temperatures, May invites residents and visitors alike to embrace the sunshine and the blooming landscapes, offering a refreshing reprieve that sets the stage for the vibrant summer ahead.
In May, Sundsvall experiences a moderate precipitation of 37 mm (1.5 in), spread across 9 days. This rainfall marks a slight increase from the preceding months, exhibiting a trend of more frequent precipitation as the region transitions into summer. Despite being less than June's average of 57 mm, May's rainfall contributes to the lush greenery that characterizes the landscape. As winter fades away, the consistent days of rain provide necessary nourishment for blooming flora, setting the stage for the vibrant months ahead. This balance of precipitation not only revitalizes the surroundings but also hints at the increasingly wet weather patterns that will dominate the summer months.
As spring transitions into summer, May in Sundsvall, Sweden brings a noticeable dip in humidity levels, settling at a comfortable 80%. This marks a significant decline from the high 97% of January, gradually easing to 86% in April. While the air starts to feel lighter, it’s a precursor to the slightly lower humidity of 76% that follows in June. Interestingly, July sees a return to 80%, hinting at a pattern of fluctuating humidity that will continue through the warmer months. As the year progresses, humidity levels will rise again into the autumn, showing a year-round rhythm that characterizes Sundsvall's maritime climate.
As the sun begins to shine brighter across Sundsvall in May, the UV Index rises to 5, signaling a shift towards moderate exposure levels. With a burn time of just 30 minutes, it's essential to take precautions if you're planning to bask in the sun. This increase in UV intensity follows a gradual climb from a low of 1 during the winter months through moderate levels in March and April, showcasing a clear trend of strengthening sunlight as summer approaches. Be sure to stay informed and protect your skin during this vibrant month by checking the Sundsvall UV Index regularly!
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As May rolls in, Sundsvall, Sweden basks in a delightful embrace of sunshine, accumulating an impressive 448 hours of sunlight. This vibrant month marks a significant increase from the dreary winter months—where January and November barely scrape by with just 64 and 115 hours respectively. Following the slow ascent of light through the spring, which saw March and April notching up 266 and 366 hours, May represents a glorious peak of brightness before summer fully takes hold. The sun-washed days of May set the stage for the even sunnier June and July, which boast nearly 500 hours each, reminding us that as the year progresses, Sundsvall's days grow ever longer and radiant, inviting both locals and visitors to soak in the warmth and beauty of this charming Swedish town.
As spring unfolds in Sundsvall, Sweden, May emerges as a transitional month characterized by an intriguing fluctuation in sunny weather. Following the steady upward trend in sunshine probability from January's modest 16% to April's promising 46%, May experiences a dip to 28%. This decline signals a shift, as warmer months approach but the weather remains unpredictable. Interestingly, the peak sun chance occurs in July with 51%, indicating that while May may still hold onto cool, overcast days, it paves the way for sunnier skies ahead. The changing patterns of sunshine in May reveal the region's dynamic spring climate, hinting at the brightness to come.
In Sundsvall, Sweden, daylight duration undergoes a remarkable transformation throughout the year. Beginning in the depths of winter, January’s short 6 hours of daylight gradually extends, reaching 8 hours in February and 11 hours by March, as spring approaches. By April, the days lengthen further to 14 hours, heralding the arrival of brighter months. May stands out with a generous 17 hours of daylight, making it a vibrant time for outdoor activities and celebrations. This trend continues into June, where daylight peaks at an impressive 19 hours. However, as summer fades, the daylight begins to recede, with July enjoying 18 hours before tapering off to 15 hours in August and 12 hours in September. The transition into autumn brings a swift decline, plunging to 9 hours in October and dwindling further to 6 hours by November, culminating in just 5 hours of daylight in December. This cyclical pattern underscores the dynamic nature of Sundsvall’s seasonal light, inviting residents and visitors alike to relish each stage of the year.
In May, Sundsvall experiences a gentle breeze with an average wind speed of 2.9 m/s (6 mph), marking a notable dip compared to the previous months. As winter transforms into spring, the calming winds seem to reflect the awakening landscape, providing a delightful atmosphere for outdoor activities. This reduction in wind speed follows a peak in March and April, where speeds hovered around 3.8 m/s (8-9 mph), indicating that the season is calming down as it progresses into summer. Interestingly, the wind speeds remain relatively consistent as summer approaches, fluctuating between 2.7 and 3.2 m/s (6-7 mph) in the subsequent months, suggesting that while May may usher in calmer winds, Sundsvall’s breezy charm continues throughout the warmer season.
Weather in Sundsvall varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Sundsvall, focusing on differences in temperature, rainfall, humidity, and UV levels.
May and January present stark contrasts in weather. In May, temperatures range from a chilly -4°C (25°F) to a pleasant 27°C (81°F), with an average of 9°C (48°F). This month sees relatively light precipitation of 37 mm (1.5 inches) over 9 days, accompanied by a moderate humidity level of 80%. In contrast, January experiences much harsher conditions, with temperatures plunging from a frigid -28°C (-18°F) to a maximum of just 8°C (47°F), averaging -5°C (24°F). The precipitation in January totals 55 mm (2.1 inches) over the same 9 days, but the humidity is notably higher at 97%. For a detailed look at January weather, visit Sundsvall weather in January.
When comparing the weather in May and February, it's evident that May offers a much milder climate. In May, temperatures range from a minimum of -4°C (25°F) to a pleasant average of 9°C (48°F), peaking at a maximum of 27°C (81°F). The month experiences lower precipitation, with 37 mm (1.5 in) falling over around 9 days, paired with a humidity level of 80%.
In sharp contrast, February is much colder, featuring a minimum temperature of -22°C (-7°F) and an average of -5°C (23°F), with a maximum of only 8°C (47°F). February also sees slightly higher precipitation at 44 mm (1.7 in) over 8 days, but the humidity is notably higher at 95%. For a more detailed look at February weather, you can check Sundsvall weather in February.
In comparing the weather of May and March, it's clear that May offers a much more temperate climate. With minimum temperatures around -4°C (25°F) and an average of 9°C (48°F), May sees warmer conditions overall, reaching a maximum of 27°C (81°F). In contrast, March experiences much colder temperatures, with a minimum of -23°C (-10°F) and an average of -1°C (30°F), peaking at just 13°C (55°F). Although March has slightly higher precipitation at 45 mm (1.8 in) compared to May's 37 mm (1.5 in), both months see rain on about 9 days. Humidity levels are also notably higher in March at 92%, compared to May's 80%. For those interested in March weather specifics, more details can be found here: Sundsvall weather in March.
In comparing the weather conditions of April and May, we can see a significant warming trend as spring progresses. In April, temperatures ranged from a chilling -14°C (7°F) at night to a milder 21°C (70°F) during the day, with an average temperature of just 3°C (38°F). The humidity was relatively high at 86%, and precipitation measured 30 mm (1.2 in) over 8 days. In contrast, May brought relatively warmer temperatures, with a minimum of -4°C (25°F), an average of 9°C (48°F), and a maximum reaching 27°C (81°F). Despite experiencing slightly more rainfall—37 mm (1.5 in) over 9 days—the humidity decreased to 80%. Overall, May offers a more pleasant and comfortable weather experience compared to the chillier April, making it a more favorable month for outdoor activities. For more detailed information, you can check Sundsvall weather in April.
May and June present a noticeable shift in weather conditions. While May features a range of temperatures from a chilly minimum of -4°C (25°F) to a warm maximum of 27°C (81°F), June sees a more consistent warmth with a minimum of 1°C (34°F) and a peak of 32°C (90°F). The average temperature in May is around 9°C (48°F), which rises significantly to 15°C (58°F) in June. Precipitation increases in June to 57 mm (2.3 in), although the total number of rainy days remains the same at nine. Humidity slightly decreases from 80% in May to 76% in June, reflecting the warmer, drier conditions of early summer. For more detailed information about June weather, check out Sundsvall weather in June.
May and July present contrasting weather patterns, reflecting the transition from spring to summer. In May, temperatures range from a chilly minimum of -4°C (25°F) to a pleasant maximum of 27°C (81°F), with an average of 9°C (48°F). The month experiences 37 mm (1.5 in) of precipitation over 9 days, along with a humidity level of 80%. In contrast, July boasts warmer temperatures, with minimums at 4°C (40°F), averages reaching 16°C (61°F), and maximums peaking at 30°C (87°F). Precipitation also increases to 77 mm (3.0 in) over 11 days, while humidity remains consistent at 80%. For more detailed information, you can check Sundsvall weather in July.
May and August present contrasting weather patterns, despite sharing similar maximum temperatures. In May, temperatures can dip as low as -4°C (25°F), with an average of 9°C (48°F) and a maximum of 27°C (81°F). This month experiences about 37 mm (1.5 in) of precipitation over roughly 9 days, contributing to a relatively high humidity level of 80%.
Conversely, August typically has warmer temperatures, with a minimum of 2°C (36°F) and an average of 15°C (59°F), while still peaking at 27°C (82°F). However, it sees increased precipitation at 74 mm (2.9 in) over 13 days and a slight rise in humidity to 86%. These statistics highlight the transition from the cool, springtime crispness of May to the more humid and potentially rainier conditions of late summer. For more insights on August weather, check Sundsvall weather in August.
In comparing the weather of May and September, we can see notable differences in temperature and precipitation patterns. May typically experiences a wider temperature range, with minimums dropping to -4°C (25°F) and maximums reaching up to 27°C (81°F). This month averages around 9°C (48°F) and has relatively low precipitation at 37 mm (1.5 in) over about 9 days, accompanied by a humidity level of 80%.
In contrast, September features a slightly smaller temperature range, with minimums at -2°C (29°F) and maximums reaching 21°C (71°F). It averages a bit cooler at 10°C (51°F) and sees increased rainfall, totaling 64 mm (2.5 in) over approximately 13 days, alongside higher humidity at 89%. This makes September feel more humid and wetter compared to the milder and drier May. For more detailed insights on the weather in September, you can refer to Sundsvall weather in September.
May and October present contrasting weather patterns as they herald the transition from spring to autumn. In May, temperatures range from a chilly minimum of -4°C (25°F) to a pleasant maximum of 27°C (81°F), with an average of 9°C (48°F). The month experiences relatively low precipitation, totaling 37 mm (1.5 in) over about 9 days, along with a humidity level of 80%. In contrast, October is cooler, with temperatures dipping to a minimum of -8°C (18°F) and a maximum of 20°C (68°F), averaging at just 5°C (42°F). Precipitation is significantly higher, with 89 mm (3.5 in) over roughly 14 days, contributing to a much higher humidity level of 93%. For more details on the weather in October, you can check Sundsvall weather in October.
In comparing the weather of May and November, we can see notable differences in temperature and humidity. May tends to be milder, with an average temperature of 9°C (48°F) and maximum highs reaching 27°C (81°F), while November sees much colder conditions, with an average of 0°C (32°F) and highs peaking at just 13°C (56°F). Additionally, May experiences lower humidity levels at 80%, compared to November's higher humidity of 94%, which contributes to a crisper atmosphere. Precipitation is slightly higher in November, with 47 mm (1.9 in) over 10 days, while May receives 37 mm (1.5 in) across 9 days. For a more detailed view of the November climate, you can check out Sundsvall weather in November.
May and December present stark contrasts in weather conditions. In May, temperatures can range from a chilly -4°C (25°F) at their lowest to a pleasant 27°C (81°F) at their peak, with an average temperature of 9°C (48°F). While May experiences a moderate precipitation level of 37 mm (1.5 in) over approximately 9 days, humidity is relatively high at 80%. In contrast, December brings much harsher conditions, with temperatures plunging to a minimum of -22°C (-7°F) and averaging -3°C (27°F), only reaching a maximum of 7°C (46°F). Precipitation in December is significantly higher at 76 mm (3.0 in) over 13 days, accompanied by a notable humidity level of 96%. For more detailed comparisons, you can refer to Sundsvall weather in December.
As May sweeps into Sundsvall, it brings a distinct transition from the cold grip of winter to a more inviting and temperate climate. While temperatures can peak pleasantly at 27°C, the average remains a cool 9°C, reflecting the lingering freshness of spring. May also witnesses a noticeable uptick in humidity, creating a lush environment, though it experiences a fair share of precipitation with about nine rainy days throughout the month. This blend of warmth and rain sets the stage for the vibrant summer months ahead, making it an exciting time to experience the diverse charm of Sundsvall. For more detailed insights into the overall weather patterns, visit Sundsvall Climate.