May Weather in Duluth, United States

Last updated: February 24, 2025

May in Duluth, United States, offers a dynamic climate as temperatures gradually warm up, with a maximum of 26°C (79°F) and an average of 8°C (47°F). The month experiences a minimum temperature dipping to -1°C (30°F), showcasing the transition from spring to early summer. With precipitation totaling 94 mm (3.7 in) spread across 11 days, residents and visitors can expect a mix of sunshine and occasional rain, leading to a humidity level of 76% that adds a refreshing feel to the air. This blend of warmth, moisture, and variability makes May an intriguing time in Duluth for outdoor activities and exploration.

May Temperature in Duluth

In Duluth, United States, the month of May marks a significant transition in temperatures as winter gives way to warmer days. With a minimum temperature of -1°C (30°F) and a pleasant average of 8°C (47°F), the chill of April begins to fade. The maximum temperature can reach a comfortable 26°C (79°F), inviting residents and visitors alike to enjoy outdoor activities in the blossoming landscape. This shift from the harsh cold of winter months, which see temperatures plummet to as low as -32°C (-25°F) in February, highlights May as a delightful prelude to summer, where the promise of vibrant greenery and longer days begins to unfold. Overall, the warming trend enhances Duluth's charm, making it a captivating destination in springtime.

May Weather in Duluth: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Duluth, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec141427354758666762483323
Data source: Temperature data for Duluth generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

May Precipitation in Duluth

In May, Duluth experiences a notable surge in precipitation, with 94 mm (or 3.7 inches) of rain falling over 11 days. This increase marks a significant jump from the previous months, reflecting the transition into the wetter late spring season. Unlike the preceding months, where rainfall remained under 75 mm, May’s precipitation sets the stage for the lush greenery that characterizes the region during the summer. The frequency of rainy days also climbs, suggesting a shift towards more consistent moisture that supports plant growth and replenishes local water sources, paving the way for the sun-soaked days of June and July.

May Precipitation Trends in Duluth

The chart displays monthly precipitation patterns in Duluth, with values for each month alongside May's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec253453749476961091191535267
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Duluth

As spring blossoms into summer, May in Duluth marks a significant shift in humidity levels, bringing a refreshing change from the winter months. With humidity tapering to 76%, the air feels noticeably lighter compared to the persistent highs of 93% in January and February. This downward trend from early spring’s 85% in April sets a promising stage for the warmer months ahead. As the summer heat approaches, humidity further drops to its lowest point of the year in July, at 70%, creating a pleasant atmosphere to enjoy the great outdoors. Thus, May serves as a transitional phase where residents can relish the mild conditions before the summer humidity peaks.

May Average Humidity in Duluth

This chart illustrates the average monthly humidity levels in Duluth, with May's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how May's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec93%93%89%85%76%71%70%71%73%82%88%91%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Duluth

In May, Duluth experiences a significant uptick in UV exposure, with a UV Index of 8 that falls into the very high category, dramatically reducing safe sun exposure time to just 15 minutes. This sharp increase compared to earlier months highlights the progressive rise in UV intensity as spring transitions into summer. While April already marked a notable jump with an Index of 7, May’s readings signal a clear trend towards heightened vigilance against sunburns. As the months continue, UV levels peak in June and July, both reaching a high of 9, before slightly tapering off in August. As you enjoy the warmer days, be sure to stay informed about the sun's strength and prioritize sun safety. For more detailed information, check out the Duluth UV Index.

Maximum UV Index Levels in Duluth for May

The chart shows the monthly maximum UV Index (UVI) for Duluth in May, 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.
JanFebMarAprMayJunJulAugSepOctNovDec234789987532
Data source: Duluth May 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.

May Sunshine in Duluth

In Duluth, May marks a delightful transition into the warmer months, basking in an impressive 297 hours of sunshine. Following the steady climb from the winter months, where sunshine hours are limited to just 122 hours in January, this burst of brightness signifies the arrival of spring's full bloom. Remarkably, May is part of a continuous upward trend, with hours of sunlight increasing from the previous months of April (239 hours) and March (239 hours), inviting residents and visitors alike to embrace outdoor activities. As the days lengthen, Duluth experiences the peak of sunlight in the early summer, reaching an astonishing 355 hours in July, setting the stage for fun-filled, sun-soaked adventures. This gradual escalation in sunshine establishes a vibrant atmosphere, making May an enchanting month for enjoying all that this charming city has to offer.

Monthly Sunshine Duration in Duluth: May Highlighted

The May sunshine duration represents the total number of hours Duluth experiences direct sunlight during the month of May, excluding cloudy or obstructed periods. This chart compares the sunshine duration of May with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec122h194h239h239h297h349h355h308h248h188h156h143h
Data source: Duluth May Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Duluth During May

As spring blossoms into early summer, Duluth witnesses a gradual increase in the chances of sunny weather, with May standing out at 47%—a noticeable uptick from the 31% in April. This trend reflects a positive shift as the city transitions from the bleakness of winter towards the warmer months. While January and February linger in the shadows of limited sunshine, the likelihood of clear skies continues to rise, culminating in July's peak at 63%. May serves as a delightful bridge, hinting at the season's promise, encouraging outdoor activities and the rejuvenation of nature. With one of the highest probabilities for sunshine in spring, May is a time for Duluthians to embrace the outdoors and revel in the brighter days ahead.

Percentage of Sunny Days in May in Duluth

The chart illustrates the percentage of sunny days in Duluth throughout the year, with May 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 Duluth experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec29%42%43%31%47%52%63%58%52%30%36%21%
Data source: Duluth May chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Duluth in May

As spring transitions into summer, May heralds a vibrant increase in daylight duration for Duluth, United States, boasting an impressive 15 hours of daylight. This surge marks a significant leap from just 13 hours in April, showcasing the lengthening days that bring warmth and optimism as winter fades away. The trend continues into June and July, where daylight remains constant at 15 hours, creating ideal conditions for outdoor activities and exploration. However, as the season shifts towards fall, daylight gradually diminishes, dropping to 14 hours in August and declining steadily through September to 12 hours, eventually returning to 9 hours by November. This cyclical pattern underscores the beauty and stark contrasts of Duluth's seasonal daylight, offering both an invigorating spring and a reflective autumn.

Average Daylight Hours in Duluth for May

The chart illustrates the variation in daylight duration in Duluth throughout the year, with May highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h10h 19m11h 57m13h 37m15h 3m15h 47m15h 23m14h 6m12h 29m10h 49m9h 21m8h 35m
Data source: Duluth daylight hours, calculated by summing the hours between sunrise and sunset for each day.

May Winds in Duluth

In Duluth, United States, the winds of May offer a gentle respite as the average wind speed registers at 4.0 m/s (9 mph). This marks a slight dip from the breezy heights of March, which boasts the highest average at 5.0 m/s (11 mph). After a windy November, which reaches 5.6 m/s (13 mph), and December's close follow-up at 5.5 m/s (12 mph), May stands out as a calmer month with soothing breezes that hint at the arrival of summer. As we transition into the warmth of June, the winds continue to mellow, suggesting a seasonal trend where spring brings a blend of refreshing gusts before yielding to the quieter summer months. Thus, May strikes a delicate balance, inviting outdoor enthusiasts to enjoy the fresh air while experiencing a gradual wind down toward the balmy days ahead.

Average May Wind Speed in Duluth

The chart displays monthly wind speed patterns in Duluth, with values for each month shown alongside May's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how May's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec4.24.75.03.94.0 m/s3.53.34.34.44.35.65.5
Data source: Duluth May wind data, generated using information from the Copernicus Climate Change Service.

How May Weather in Duluth Compares to Other Months

The weather in Duluth 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 Duluth and find detailed weather information for every month.

In comparing the weather of May and January, a stark contrast is evident. May experiences significantly milder temperatures, ranging from a minimum of -1°C (30°F) to a pleasant maximum of 26°C (79°F), with an average of 8°C (47°F). During this month, Duluth sees about 94 mm (3.7 in) of precipitation over 11 days, accompanied by a humidity level of 76%. In comparison, January presents a much harsher climate, with temperatures plummeting to a minimum of -31°C (-24°F) and averaging -10°C (15°F); the maximum only reaching 5°C (41°F). Precipitation is considerably lower at 25 mm (1.0 in) over just 6 days, but the humidity is higher at 93%. For more details on January weather, you can check Duluth weather in January.

When comparing the weather in May and February, the stark differences are evident. May experiences much milder temperatures, with a minimum of -1°C (30°F) and an average of 8°C (47°F), peaking at a pleasant 26°C (79°F). In contrast, February is significantly colder, featuring a minimum temperature of -32°C (-25°F) and an average of -10°C (14°F), with a maximum only reaching 8°C (47°F). Additionally, May sees more precipitation, totaling 94 mm (3.7 in) over 11 days, while February has less with 33 mm (1.3 in) across 7 days. Humidity levels are also notable, as February's humidity is quite high at 93%, compared to May's 76%. For a closer look at February weather specifics, check out Duluth weather in February.

When comparing the weather in March and May, it's clear that May offers a much milder climate. In March, temperatures can plummet as low as -22°C (-8°F), with an average temperature of -3°C (28°F). In contrast, May's temperatures range from a minimum of -1°C (30°F) to a pleasant average of 8°C (47°F), peaking at 26°C (79°F). Precipitation levels also differ, with March receiving 53 mm (2.1 in) over about 6 days, while May sees a higher total of 94 mm (3.7 in) across 11 days. Moreover, March has a humidity level of 89%, slightly higher than May's 76%, indicating a more uncomfortable atmosphere in the earlier month. For a more detailed understanding of March weather specifics, you can refer to this link: Duluth weather in March.

When comparing the weather in April and May, notable differences emerge in both temperature and precipitation. May experiences a wider temperature range, with minimums of -1°C and maximums reaching up to 26°C, resulting in a significantly warmer average of 8°C compared to April's average of 2°C. Additionally, while both months see considerable precipitation, May has slightly higher rainfall at 94 mm over 11 days, in contrast to April's 74 mm over 10 days. Humidity levels also shift, dropping to 76% in May from 85% in April, making May generally feel more comfortable. For more details on April weather, visit Duluth weather in April.

May and June exhibit notable differences in weather patterns. In May, temperatures range from a chilly minimum of -1°C (30°F) to a warm maximum of 26°C (79°F), averaging around 8°C (47°F). This month also experiences higher precipitation with 94 mm (3.7 in) spread across 11 days and a humidity level of 76%. In contrast, June sees a rise in temperatures, with a minimum of 5°C (42°F), an average of 15°C (59°F), and a maximum of 28°C (82°F). The precipitation decreases slightly to 76 mm (3.0 in), occurring over 9 days, with a lower humidity level of 71%. For more details on June weather specifics, you can check Duluth weather in June.

In May, Duluth experiences a wide range of temperatures, with lows dipping to -1°C (30°F) and average highs reaching up to 26°C (79°F). The month is characterized by relatively high humidity at 76% and substantial precipitation, totaling 94 mm (3.7 in) over 11 days. In contrast, July offers much milder temperatures, with a minimum of 11°C (53°F) and an average of 19°C (66°F), peaking at 27°C (82°F). Precipitation remains similar at 95 mm (3.8 in) but occurs over fewer days—just 8 days—with humidity decreasing slightly to 70%. For a more detailed overview, check Duluth weather in July.

May typically experiences a wider temperature range compared to August, with minimums dipping to -1°C (30°F) and maximums reaching up to 26°C (79°F). In contrast, August enjoys more stable temperatures, with minimums around 13°C (55°F) and highs peaking at 27°C (82°F). Despite May receiving slightly less precipitation, the humidity levels are higher at 76%, whereas August sees a more comfortable 71%. For those interested in more details, check out Duluth weather in August.

May and September each showcase distinct weather characteristics, though they share similar maximum temperatures, peaking at around 26°C (79°F) in May and 26°C (80°F) in September. May experiences a cooler minimum temperature of -1°C (30°F), while September begins to warm up with a minimum of 4°C (39°F). In terms of precipitation, September sees a slight increase with 119 mm (4.7 in) compared to May's 94 mm (3.7 in), reflecting a trend of wetter weather in early autumn. Humidity levels are also slightly lower in September at 73%, compared to 76% in May. For a detailed overview of September's climate, you can visit Duluth weather in September.

May and October present distinct weather patterns in terms of temperature and precipitation. May typically experiences a wider range of temperatures with a minimum of -1°C (30°F) and a maximum of 26°C (79°F), providing an average of 8°C (47°F). In contrast, October has cooler temperatures, with a minimum of -5°C (24°F) and a maximum of 22°C (71°F), averaging 9°C (48°F).

Precipitation is also more significant in October, with an average of 153 mm (6.0 in) over 13 days, compared to May’s 94 mm (3.7 in) over 11 days. Additionally, October tends to be slightly more humid at 81%, compared to May's 76%. For more details, you can check out Duluth weather in October.

Comparing the weather in May and November reveals significant contrasts. In May, temperatures range from a chilly -1°C (30°F) at night to a pleasant high of 26°C (79°F) during the day, making it a much warmer month with an average temperature of 8°C (47°F). Precipitation is relatively high at 94 mm (3.7 in) over 11 days, with humidity averaging around 76%.

In stark contrast, November experiences much cooler temperatures, with nighttime lows dropping to -12°C (11°F) and daytime highs peaking at 17°C (63°F). The average temperature in November is just 1°C (34°F), and while precipitation is lower at 52 mm (2.0 in) over 10 days, humidity increases to 87%, creating a crisp and often damp atmosphere. For more details, you can check the Duluth weather in November.

May and December present strikingly different weather conditions. May enjoys a milder climate with average temperatures around 8°C (47°F) and a maximum of 26°C (79°F), while December experiences much colder temperatures, averaging -5°C (23°F) and only reaching a maximum of 9°C (48°F). Precipitation levels are relatively comparable, with May receiving 94 mm (3.7 in) over 11 days and December seeing 67 mm (2.6 in) over 10 days. Notably, December's humidity is higher, at 91%, compared to May's 76%, contributing to a chillier atmosphere. For a closer look at December's weather specifics, you can check out Duluth weather in December.

Compare Duluth's Climate with Cities Worldwide

Conclusion: What to Expect From May Weather in Duluth

As May unfolds in Duluth, the transition to warmer weather becomes evident, with noticeably higher temperatures compared to the brisk chill of earlier months. This month typically features a pleasant mix of sunny days and occasional rain, contributing to the region's lush spring scenery. While the average temperature starts to rise, the humidity remains relatively high, adding a refreshing quality to the air. However, May also brings a fair share of precipitation, with several rainy days that help prepare the landscape for the lush summer ahead. For a deeper understanding of Duluth's weather patterns throughout the year, be sure to explore Duluth Climate.