August Weather in Bar Harbor, United States

Last updated: February 24, 2025

August in Bar Harbor, United States is characterized by a warm and inviting climate, with a maximum temperature reaching 29°C (85°F) and a comfortable average of 20°C (68°F). As summer winds down, visitors can expect minimum temperatures of 12°C (53°F) during the cooler evenings. While the month sees an average precipitation amount of 73 mm (2.9 in) over 8 days, the humidity levels are fairly high at 74%, creating a lush and vibrant atmosphere. Whether you're exploring the scenic beauty of Acadia National Park or enjoying the local cuisine, August offers a delightful backdrop for outdoor adventures and relaxation in this coastal gem.

August Temperature in Bar Harbor

In August, Bar Harbor basks in the warmth of summer, with temperatures reaching a pleasant average of 20°C (68°F). The month begins with slightly higher minimum temperatures at 12°C (53°F) and can peak around 29°C (85°F), creating ideal conditions for outdoor activities and exploration. This trend of rising temperatures builds on the foundations set in July, which shares similar highs, making August a prime time for enjoying the stunning coastline and lush landscapes. As the month progresses, the warmth begins to give way to the cooler evenings of early autumn, setting the stage for a gradual transition into September's lower averages. Overall, August in Bar Harbor is characterized by its inviting warmth, perfect for both tourists and locals to revel in the natural beauty of this coastal gem.

August Weather in Bar Harbor: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Bar Harbor, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec252632425261676861524030
Data source: Temperature data for Bar Harbor 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.

August Precipitation in Bar Harbor

August in Bar Harbor experiences relatively moderate precipitation, with a total of 73 mm (2.9 in) over approximately 8 days. This marks a notable decrease in rainfall from the wetter months of spring and early summer, setting it apart as a drier month compared to both July and September. The trend of August's milder precipitation aligns with the overall pattern of decreasing rainfall as summer transitions into fall, providing a pleasant climate for outdoor activities. As the year progresses, late summer offers a brief respite from the heavier downpours that define earlier months, making it an ideal time for visitors to enjoy Bar Harbor's natural beauty.

August Precipitation Trends in Bar Harbor

The chart displays monthly precipitation patterns in Bar Harbor, 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.
JanFebMarAprMayJunJulAugSepOctNovDec9890731309279807395107131138
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Bar Harbor

In Bar Harbor, the month of August maintains a consistent trend in humidity, mirroring the slightly lower levels experienced in July at 74%. This summer month typically signals a peak in warmth and outdoor activities, yet humidity remains manageable compared to the chillier, moist winter months. As the year progresses, we observe a gradual decrease from the higher levels of 88% in January and February down to the more comfortable 74% by mid-summer. However, as autumn approaches in September, humidity rises again to 77%, hinting at the transition to more moisture-laden air. This moderate humidity level in August ensures that visitors can enjoy the stunning coastal scenery without overwhelming discomfort, making it an ideal time for exploration.

August Average Humidity in Bar Harbor

This chart illustrates the average monthly humidity levels in Bar Harbor, 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.
JanFebMarAprMayJunJulAugSepOctNovDec88%88%85%81%76%74%74%74%77%82%85%84%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Bar Harbor

In August, Bar Harbor experiences a UV Index of 8, categorizing it as very high and indicating a burn time of just 15 minutes for unprotected skin. This trend follows the rising UV levels seen throughout the summer months, peaking in June at 10. As summer winds down, the UV Index begins to taper, with September dropping to 7. Overall, from a low of 2 in January to the highs of summer, it's clear that UV exposure intensifies significantly during the warmer months. For more details on staying safe under the sun, check out the Bar Harbor UV Index.

Maximum UV Index Levels in Bar Harbor for August

The chart shows the monthly maximum UV Index (UVI) for Bar Harbor 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.
JanFebMarAprMayJunJulAugSepOctNovDec2457910887532
Data source: Bar Harbor 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 Bar Harbor

In Bar Harbor, United States, August shines brightly with an impressive 326 hours of sunshine, marking it as one of the sunniest months of the year. This trend of increasing sunlight begins in the winter months, gradually building through the spring and summer. From a modest 141 hours in January, the days lengthen significantly, culminating in the vibrant warmth of August. Following this peak, September sees a gentle decline to 281 hours, reminding visitors that even as summer fades, the light continues to linger. This consistent increase in sunlight throughout the warmer months not only enhances Bar Harbor's breathtaking scenery but also invites adventure, making it a prime destination for those seeking the perfect summer escape.

Monthly Sunshine Duration in Bar Harbor: August Highlighted

The August sunshine duration represents the total number of hours Bar Harbor 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.
JanFebMarAprMayJunJulAugSepOctNovDec141h188h257h244h292h316h318h326h281h224h184h170h
Data source: Bar Harbor August Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Bar Harbor During August

In Bar Harbor, the likelihood of sunny weather experiences a noticeable dip in August, with only 31% chance of sunshine. This contrasts sharply with the significantly higher likelihoods in March (57%) and November (55%), suggesting a shift as summer progresses. Interestingly, the peak summer months of June and July show even lower probabilities, at 39% and 25%, respectively, hinting that while August is typically associated with warm summer days, the reality is often more overcast. Notably, September rebounds to 39%, indicating a slight resurgence of sunny days as the region transitions into fall, providing a captivating glimpse into Bar Harbor's variable summer weather patterns.

Percentage of Sunny Days in August in Bar Harbor

The chart illustrates the percentage of sunny days in Bar Harbor 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 Bar Harbor experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec41%38%57%34%36%39%25%31%39%43%55%39%
Data source: Bar Harbor August chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Bar Harbor in August

In Bar Harbor during August, the days begin to shorten as summer gracefully transitions into fall, offering approximately 13 hours of daylight. This month follows the peak summer months of June and July, which boast the longest days with 15 hours of sunlight, inviting residents and visitors alike to bask in the vibrant outdoors. As daylight diminishes slightly in August, it signals a shift, but the lingering long evenings still provide ample opportunities for exploration and enjoyment. The trend observed from August onwards shows a steady decline in daylight hours, reminding us of nature's rhythm as we prepare for the cozy ambiance of autumn.

Average Daylight Hours in Bar Harbor for August

The chart illustrates the variation in daylight duration in Bar Harbor throughout the year, with August highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 15m10h 27m11h 57m13h 29m14h 48m15h 28m15h 6m13h 56m12h 27m10h 55m9h 34m8h 52m
Data source: Bar Harbor daylight hours, calculated by summing the hours between sunrise and sunset for each day.

August Winds in Bar Harbor

In Bar Harbor, the winds of August bring a notable calm, with an average speed of just 2.9 m/s (7 mph), marking the lowest point of the year. Following a gradual decline since mid-summer, this serene period contrasts sharply with the brisk winds of March that peak at 5.1 m/s (11 mph). Overall, the data reveals a fascinating seasonal pattern: as winter transitions to spring, wind speeds typically increase, peaking in late winter and early spring, before tapering off during the warmer summer months. As fall approaches in September and October, wind speeds regain some momentum, hinting at a return to the invigorating breezes characteristic of Bar Harbor’s colder seasons.

Average August Wind Speed in Bar Harbor

The chart displays monthly wind speed patterns in Bar Harbor, 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.
JanFebMarAprMayJunJulAugSepOctNovDec4.44.25.14.53.94.13.42.9 m/s3.73.84.34.6
Data source: Bar Harbor August wind data, generated using information from the Copernicus Climate Change Service.

How August Weather in Bar Harbor Compares to Other Months

The weather in Bar Harbor 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 Bar Harbor and find detailed weather information for every month.

The weather comparison between August and January reveals stark contrasts. In August, temperatures range from a comfortable 12°C (53°F) at night to a warm 29°C (85°F) during the day, accompanied by moderate humidity at 74% and 73 mm of precipitation over an average of 8 days. In contrast, January presents a much colder landscape, with minimum temperatures plunging to -23°C (-8°F) and daily highs reaching only 11°C (51°F). The winter month is also marked by greater humidity at 88% and slightly higher precipitation at 98 mm, occurring over 9 days. These differences highlight the dramatic seasonal shift in Bar Harbor's climate. For more details, you can check Bar Harbor weather in January.

August and February present stark contrasts in weather conditions. In August, temperatures range from a mild 12°C (53°F) at night to a warm 29°C (85°F) during the day, with an average temperature of 20°C (68°F). The month sees about 73 mm (2.9 in) of precipitation over 8 days, coupled with a humidity level of 74%, creating a warm and somewhat humid atmosphere.

In sharp contrast, February experiences significantly colder temperatures, with a minimum of -20°C (-4°F) and a maximum of 13°C (56°F), averaging around -3°C (26°F). This month is wetter in terms of total precipitation, accumulating 90 mm (3.6 in) over 10 days, and the humidity is higher at 88%, resulting in a chilly and damp environment. For more detailed weather data, you can check Bar Harbor weather in February.

August and March present stark contrasts in weather conditions. In August, temperatures range from a minimum of 12°C (53°F) to a maximum of 29°C (85°F), with an average of 20°C (68°F), fostering a warm and humid environment with 74% humidity and 73 mm of precipitation over about 8 days. In contrast, March is characterized by much colder temperatures, with a minimum of -18°C (0°F) and an average of 0°C (32°F), peaking at 14°C (58°F). The humidity is slightly higher at 85%, and precipitation remains comparable at 73 mm over 9 days. For a deeper look into the specifics of March weather, visit Bar Harbor weather in March.

When comparing the weather in August and April, it's clear that August is significantly warmer and drier. August boasts average temperatures ranging from a minimum of 12°C (53°F) to a maximum of 29°C (85°F), while April features much cooler temperatures with a range from -4°C (24°F) to 18°C (65°F). Precipitation levels are also notable; April receives 129 mm (5.1 in) of rain over 13 days, significantly more than August's 73 mm (2.9 in) over just 8 days. Humidity is higher in April at 81% compared to August's 74%. For a closer look at April's weather specifics, you can check out Bar Harbor weather in April.

When comparing the weather in August and May, notable contrasts emerge in both temperature and precipitation. August enjoys a warmer climate with average temperatures ranging from a minimum of 12°C (53°F) to a maximum of 29°C (85°F), while May presents cooler conditions, where temperatures range from 2°C (36°F) to 25°C (78°F) on average. Precipitation is slightly lower in August, measuring 73 mm (2.9 in) over 8 days, compared to May's 92 mm (3.6 in) across 11 days. Additionally, humidity levels remain relatively similar, averaging 74% in August and 76% in May. For more detailed weather information, check Bar Harbor weather in May.

In comparing the weather of August and June, we notice distinct patterns. August typically enjoys warmer temperatures with a minimum of 12°C (53°F) and an average of 20°C (68°F), while June starts off cooler at a minimum of 6°C (42°F) and an average of 16°C (61°F). Interestingly, June boasts a maximum temperature of 30°C (86°F), which is comparable to August's peak of 29°C (85°F). Regarding precipitation, June has slightly higher rainfall with 79 mm (3.1 in) over 9 days, compared to August's 73 mm (2.9 in) over 8 days. Both months share similar humidity levels at 74%. For those wanting to explore Bar Harbor's June climate in detail, refer to Bar Harbor weather in June.

The weather in August is characterized by slightly warmer temperatures compared to July, with an average of 20°C (68°F) and a maximum of 29°C (85°F), while July sees an average of 19°C (67°F) and a peak of 30°C (86°F). Both months maintain a similar level of humidity at 74%, but August experiences a decrease in precipitation, totaling 73 mm (2.9 in) over 8 days, compared to July's 80 mm (3.2 in) over 10 days. For those interested in a detailed overview of July's weather, please refer to Bar Harbor weather in July.

August typically brings warmer weather compared to September, with average temperatures around 20°C (68°F) and maximums reaching up to 29°C (85°F). In contrast, September sees a notable drop in temperature, averaging 16°C (61°F) and peaking at 27°C (81°F), with cooler minimums of 5°C (42°F). Precipitation in September is slightly higher at 95 mm (3.7 in) over 7 days, compared to August’s 73 mm (2.9 in) over 8 days, and humidity also increases slightly from 74% in August to 77% in September. To learn more about the specific weather conditions to expect, check out Bar Harbor weather in September.

August and October present stark contrasts in weather conditions. In August, temperatures are warmer, ranging from a minimum of 12°C (53°F) to a maximum of 29°C (85°F), making it a pleasant month with an average of 20°C (68°F). However, it also sees about 73 mm (2.9 in) of precipitation over 8 days, accompanied by a humidity level of 74%. In contrast, October ushers in cooler temperatures, with a minimum of 0°C (32°F) and an average of just 11°C (52°F), peaking at 21°C (70°F). This month experiences higher rainfall, totaling 107 mm (4.2 in) over 11 days, along with increased humidity at 82%. For more detailed insights, you can explore Bar Harbor weather in October.

August and November present stark contrasts in weather patterns. In August, temperatures range from a mild 12°C (53°F) at night to a warm 29°C (85°F) during the day, with an average of 20°C (68°F). The month experiences moderate precipitation of 73 mm (2.9 in) over about 8 days, with a relatively comfortable humidity level of 74%. In contrast, November brings much chillier temperatures, with a minimum of -15°C (6°F) and an average of just 4°C (40°F). The maximum temperature reaches 17°C (63°F), but the month is significantly wetter, receiving 130 mm (5.1 in) of rainfall over 12 days and higher humidity at 85%. For more detailed information, you can check Bar Harbor weather in November.

August and December present stark contrasts in weather. In August, the temperatures are much warmer, with a minimum of 12°C (53°F) and a maximum reaching up to 29°C (85°F), accompanied by a relatively moderate level of humidity at 74%. Precipitation is lower during this month, averaging around 73 mm (2.9 in) over 8 days. In contrast, December experiences frigid temperatures, with lows plummeting to -22°C (-7°F) and highs only reaching up to 15°C (59°F). The month sees a significant increase in precipitation, totaling 138 mm (5.4 in) over 11 days, along with higher humidity at 84%. For more details on December weather, you can visit Bar Harbor weather in December.

Compare Bar Harbor's Climate with Cities Worldwide

Conclusion: What to Expect From August Weather in Bar Harbor

August in Bar Harbor brings a delightful blend of warmth and occasional rain, setting it apart from the cooler months. With maximum temperatures reaching a comfortable 29°C (85°F), it's a time when the vibrant local scenery thrives under the sun. However, with an average temperature of 20°C (68°F), nights can be refreshingly cool, making it an inviting escape. Humidity levels hover around 74%, adding a touch of summer's warmth, while the 73 mm (2.9 in) of precipitation over 8 days reminds visitors to prepare for brief, refreshing showers. This combination creates the perfect atmosphere for outdoor adventures and enjoying the natural beauty that Bar Harbor has to offer. For more insights into how August fits into the overall climate, check out Bar Harbor Climate.