August Weather in Grand Marais, United States

Last updated: February 24, 2025

August in Grand Marais, United States, offers a delightful blend of summer warmth and moderate humidity. With maximum temperatures reaching up to 25°C (77°F) and an average of 17°C (62°F), visitors can enjoy a comfortable climate for outdoor activities. However, the month brings 78 mm (3.1 in) of precipitation over 10 days, reminding us to keep an umbrella handy for those occasional summer showers. The humidity level sits at a pleasant 71%, contributing to the lush, scenic beauty that this charming locale is known for. Overall, August presents an inviting atmosphere for exploring the natural wonders of Grand Marais.

August Temperature in Grand Marais

In August, Grand Marais experiences a delightful warming trend that stands in stark contrast to its harsh winter months. With minimum temperatures averaging around 10°C (50°F) and maximums reaching 25°C (77°F), it's a time when residents and visitors can enjoy the balmy summer days. The average temperature of 17°C (62°F) highlights the peak of warmth for the year, making it an ideal month for outdoor activities and soaking in the natural beauty of the area. As summer slowly transitions into fall, the temperatures begin to dip slightly, but August remains a pivotal point of warmth and vibrancy, inviting everyone to embrace the beauty of the season before the coolness of autumn sets in.

August Weather in Grand Marais: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Grand Marais, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec151426344452606256453121
Data source: Temperature data for Grand Marais 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.

August Precipitation in Grand Marais

In August, Grand Marais experiences a noticeable uptick in rainfall, with total precipitation reaching 78 mm (3.1 in) over approximately 10 days. This increase marks the peak of the summer months, following a steady rise in precipitation beginning in June. Notably, as summer transitions into fall, the amount of rain tends to amplify, as seen in September's 103 mm (4.1 in). The pattern suggests a climate that fosters lush landscapes, culminating in vibrant autumn hues, but also hints at the eagerness of summer to give way to the wetter, cooler months ahead.

August Precipitation Trends in Grand Marais

The chart displays monthly precipitation patterns in Grand Marais, with values for each month alongside August's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec33404267676963781031025563
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Grand Marais

August in Grand Marais sees a moderate humidity level of 71%, continuing a trend of gradual improvement from the peak of summer. As the year unfolds, we observe a consistent decline from the 93% humidity of January and February, with a notable drop throughout the spring and early summer months. This slight rebound in August, when compared to the lower levels of July, hints at a mild shift back as fall approaches, leading to a gradual increase in humidity levels in September and October. Overall, the trend reveals a seasonal rhythm where humid conditions ease as summer wanes, offering residents and visitors a brief respite before the return of autumn’s embrace.

August Average Humidity in Grand Marais

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

August UV Index in Grand Marais

In August, Grand Marais experiences a UV Index of 8, categorized as very high, indicating that sun protection is essential for anyone spending time outdoors. This month mirrors the intensity of July, where the UV levels peaked, showcasing a trend of increasing UV exposure as summer progresses. With a burn time of just 15 minutes, visitors and residents alike should be vigilant, particularly as days remain warm and sunny. As you enjoy the beauty of this lakeside town, don't forget to prioritize your skin's safety. For more information on UV exposure throughout the year, visit Grand Marais UV Index.

Maximum UV Index Levels in Grand Marais for August

The chart shows the monthly maximum UV Index (UVI) for Grand Marais in August, 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.
JanFebMarAprMayJunJulAugSepOctNovDec245689987521
Data source: Grand Marais August 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.

August Sunshine in Grand Marais

As summer slowly transitions to fall in Grand Marais, August brings a delightful 320 hours of sunshine, maintaining a stellar brightness that mirrors the peak summer months. Following July's impressive 357 hours, August still shines brightly, though a slight decrease signals the impending change of seasons. This pattern highlights the area's bountiful summer, where residents and visitors alike savor the long, sunlit days before autumn ushers in shorter daylight hours. Interestingly, August's sunshine begins to wane, reminiscent of the earlier months, particularly as the city prepares for September's 253 hours, a clear indicator of the shifting climate. In Grand Marais, August encapsulates the warmth and vibrancy of summer while hinting at the beauty that autumn will bring.

Monthly Sunshine Duration in Grand Marais: August Highlighted

The August sunshine duration represents the total number of hours Grand Marais experiences direct sunlight during the month of August, excluding cloudy or obstructed periods. This chart compares the sunshine duration of August with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec114h195h254h254h309h347h357h320h253h187h147h136h
Data source: Grand Marais August Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Grand Marais During August

In August, Grand Marais, United States, welcomes a 56% chance of sunny weather, making it one of the most favorable months for sunshine in the year. Following the peak of July, which boasts a 64% chance, August maintains a strong likelihood of clear skies, yet shows a slight dip that hints at the transition into the cooler months ahead. As summer begins to wane, the probability of sunny days remains remarkably high compared to the chillier months like December and January, where sunshine is scarce, dropping to 17%. Overall, August stands out for its vibrant summer weather, perfect for outdoor activities and enjoying the stunning landscapes this charming town has to offer.

Percentage of Sunny Days in August in Grand Marais

The chart illustrates the percentage of sunny days in Grand Marais throughout the year, with August 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 Grand Marais experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec26%25%45%33%44%44%64%56%49%31%32%17%
Data source: Grand Marais August chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Grand Marais in August

In Grand Marais, United States, the month of August marks a gentle transition as daylight begins to dwindle from the peak summer months, offering an average of 14 hours of sunlight. This slight decrease follows a pattern established in the preceding months of June and July, which enjoy 15 hours of daylight, the longest of the year. As summer gives way to autumn, the duration of daylight gradually reduces, with a noticeable drop to 12 hours in September. This trend reflects the shifting seasons, allowing residents and visitors alike to relish the warm, extended evenings of late summer before the daylight hours continue to shorten into fall.

Average Daylight Hours in Grand Marais for August

The chart illustrates the variation in daylight duration in Grand Marais throughout the year, with August highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec8h 53m10h 15m11h 56m13h 40m15h 10m15h 55m15h 30m14h 10m12h 30m10h 46m9h 15m8h 27m
Data source: Grand Marais daylight hours, calculated by summing the hours between sunrise and sunset for each day.

August Winds in Grand Marais

In August, Grand Marais experiences a refreshing change in its wind dynamics. The average wind speed rises to 4.4 m/s (10 mph), marking a subtle increase from the summer months, where the breezes were more subdued, averaging around 3.3 to 3.7 m/s (7 to 8 mph). This uptick in wind speed continues a trend that often follows the calmer July, hinting at the transition towards the more blustery conditions typical in autumn. As the days begin to shorten and the warmth lingers, the August winds serve as a gentle reminder of the changing seasons, invigorating the coastal landscape and enticing outdoor enthusiasts to embrace the beauty of this picturesque month in Grand Marais.

Average August Wind Speed in Grand Marais

The chart displays monthly wind speed patterns in Grand Marais, with values for each month shown alongside August's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how August's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec4.85.15.24.53.73.43.34.4 m/s4.04.35.76.0
Data source: Grand Marais August wind data, generated using information from the Copernicus Climate Change Service.

How August Weather in Grand Marais Compares to Other Months

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

August and January present starkly contrasting weather patterns. In August, temperatures generally range from a mild 10°C (50°F) at night to a warm 25°C (77°F) during the day, accompanied by 78 mm (3.1 in) of rainfall over about 10 days, with an average humidity of 71%. In sharp contrast, January features frigid conditions, with temperatures plummeting to a minimum of -28°C (-19°F) and averaging -9°C (15°F) during the day, all while receiving only 33 mm (1.3 in) of precipitation across 7 days, though the humidity is notably higher at 93%. This highlights how the summer warmth of August significantly differs from the biting cold of January. For more detailed information, check out Grand Marais weather in January.

August and February present stark contrasts in weather conditions. In August, temperatures range from a comfortable minimum of 10°C (50°F) to a pleasant maximum of 25°C (77°F), with an average of 17°C (62°F). The month experiences about 78 mm (3.1 in) of precipitation over 10 days, accompanied by a humidity level of 71%. On the other hand, February brings much colder temperatures, with a chilling minimum of -29°C (-20°F) and an average of -10°C (14°F), peaking at just 7°C (44°F). This winter month sees significantly less precipitation at 40 mm (1.6 in) over 9 days, but the humidity is notably high at 93%. For more detailed insights on February weather, visit Grand Marais weather in February.

The weather in August presents a stark contrast to that of March, showcasing the dramatic seasonal changes. In August, temperatures range from a mild 10°C (50°F) at night to a comfortable high of 25°C (77°F), accompanied by a moderate humidity level of 71%. Precipitation occurs on about ten days, totaling 78 mm (3.1 in). Conversely, March is characterized by much colder conditions, with temperatures plummeting to a minimum of -23°C (-10°F) and only reaching an average maximum of 8°C (47°F). The humidity is higher at 89%, and snowfall may contribute to the 42 mm (1.6 in) of precipitation that typically falls over six days. For more specific details regarding the March climate, you can refer to Grand Marais weather in March.

When comparing the weather in August and April, it’s evident that August is much warmer and more pleasant. In August, temperatures range from a cool 10°C (50°F) at the minimum to a comfortable maximum of 25°C (77°F), with an average of 17°C (62°F). In contrast, April experiences significantly lower temperatures, with minimums dropping to -11°C (12°F) and a maximum of just 12°C (54°F), averaging only 1°C (34°F). Both months see regular precipitation, but April's 67 mm (2.6 in) over 9 days and higher humidity at 85% create a much chillier and damp atmosphere compared to August’s 78 mm (3.1 in) over 10 days and 71% humidity. For more details about April weather, check out Grand Marais weather in April.

In comparing the weather between May and August, August presents significantly warmer temperatures, with a minimum of 10°C (50°F) and an average of 17°C (62°F), peaking at 25°C (77°F). This contrasts sharply with May, where temperatures range from a chilly -4°C (26°F) to a maximum of 17°C (63°F), with an average of only 7°C (44°F). Although both months experience precipitation on about 10 days, August sees slightly more rain, totaling 78 mm (3.1 in) compared to May's 67 mm (2.6 in). Humidity levels are relatively high in both months, with August at 71% and May slightly higher at 76%. For a closer look at May's climate specifics, you can refer to Grand Marais weather in May.

In comparing the weather between June and August, it’s clear that August is generally warmer with average temperatures reaching 17°C (62°F) compared to June's average of 11°C (53°F). The maximum temperature in August can soar up to 25°C (77°F), whereas in June, it peaks at 21°C (71°F). Both months experience similar levels of humidity at 71%, but August sees slightly more precipitation, averaging 78 mm (3.1 in) over 10 rainy days compared to June's 69 mm (2.7 in) over 11 days. For a detailed overview, you can check Grand Marais weather in June.

In comparing the weather between July and August, both months experience similar maximum temperatures, reaching up to 25°C (77°F). However, August tends to be slightly warmer on average, with temperatures ranging from a minimum of 10°C (50°F) to an average of 17°C (62°F), compared to July's minimum of 7°C (46°F) and average of 16°C (60°F). Precipitation is also higher in August, with 78 mm (3.1 in) over 10 days, compared to July's 63 mm (2.5 in) over 8 days. Humidity remains consistent, with August having a slight increase at 71% compared to July's 70%. For more details on July weather, you can check Grand Marais weather in July.

In comparing the weather of August and September, notable differences emerge. August typically experiences milder temperatures with a minimum of 10°C (50°F) and an average of 17°C (62°F), peaking at a maximum of 25°C (77°F). In contrast, September sees a considerable drop in minimum temperatures, reaching as low as 2°C (36°F) with an average of 13°C (56°F) and a high of 23°C (73°F). Additionally, September brings increased precipitation, totaling 103 mm (4.1 in) over 12 days, compared to August's 78 mm (3.1 in) over 10 days. While humidity levels remain similar, slightly higher in September at 73%, the overall feel of the weather shifts towards a cooler, wetter ambiance. For more detailed insights, you can check out Grand Marais weather in September.

August typically experiences milder temperatures, with a minimum of 10°C (50°F) and an average of 17°C (62°F), peaking at a comfortable 25°C (77°F). In contrast, October brings a notable drop in temperatures, starting as low as -5°C (24°F) and averaging only 7°C (45°F), while reaching a maximum of 18°C (64°F). Precipitation levels also increase, with October receiving 101 mm (4.0 in) over 12 days compared to August's 78 mm (3.1 in) over 10 days. Additionally, humidity rises slightly in October to 81%, compared to August's 71%. For more details about how October weather unfolds in this region, check out Grand Marais weather in October.

August and November present a stark contrast in weather conditions. In August, temperatures range from a comfortable minimum of 10°C (50°F) to a pleasant maximum of 25°C (77°F), with an average of 17°C (62°F). Despite experiencing rainfall on about 10 days, with a total precipitation of 78 mm (3.1 in), the humidity level of 71% often adds a warm, summery feel to the air.

In sharp comparison, November sees significantly cooler temperatures, with a minimum plunging to -14°C (7°F) and an average around -1°C (31°F). The maximum temperature barely reaches 13°C (55°F), and the month experiences less rainfall, totaling 54 mm (2.1 in) across 9 days, though the humidity is notably higher at 87%. This shift marks a transition into a colder, morewintry atmosphere, making November undeniably distinct from the warmth of August. For further details, you can check Grand Marais weather in November.

In August, the weather is much milder, with temperatures ranging from a minimum of 10°C (50°F) to a maximum of 25°C (77°F) and an average of 17°C (62°F). It experiences 78 mm (3.1 in) of precipitation over about 10 days, accompanied by a humidity level of 71%. In stark contrast, December brings significantly colder conditions, with temperatures plunging to a minimum of -27°C (-16°F) and an average of -6°C (21°F), peaking at just 9°C (48°F). Despite having slightly less rainfall at 63 mm (2.5 in), December's humidity rises to 91%, creating a much more frigid atmosphere. For more details, check out Grand Marais weather in December.

Compare Grand Marais's Climate with Cities Worldwide

Conclusion: What to Expect From August Weather in Grand Marais

In August, Grand Marais experiences a delightful transition as summer begins to wane. While the days often reach comfortable highs, the average temperature creates a pleasant atmosphere for outdoor adventures. Humidity levels are relatively moderate, providing a refreshing feel despite occasional rain, which tends to be more frequent this month compared to earlier summer weeks. With around 10 days of precipitation, it's a gentle reminder that nature is gearing up for the fall season. As you explore this charming lakeside town, you'll find that August strikes a perfect balance between warm summer days and the crispness of autumn on the horizon. For a deeper dive into the climatic characteristics of the region, make sure to check out Grand Marais Climate.