August Weather in Baltimore, United States

Last updated: February 24, 2025

Experience the vibrant August weather in Baltimore, where the city basks in an average temperature of 25°C (78°F), soaring up to a sizzling 33°C (92°F) during peak days. With a minimum of 16°C (62°F), the mornings offer a refreshing start to the day. However, be prepared for some rain—143 mm (5.6 in) of precipitation falls over roughly 16 days, contributing to the city's lush landscapes. The humidity hangs around a muggy 72%, adding a warm embrace to the summer atmosphere. Whether you're soaking up the sun or enjoying a summer storm, Baltimore in August promises a delightful mix of heat and refreshing rain.

August Temperature in Baltimore

In August, Baltimore experiences the height of summer with temperatures that reflect its warm climate. The average temperature settles around a balmy 25°C (78°F), while nighttime lows hover at a comfortable 16°C (62°F). As the days peak, highs can reach up to 33°C (92°F), often inviting residents and visitors alike to enjoy outdoor activities. This month marks a continuation of July's heat, although slightly milder, creating a perfect backdrop for enjoying the city's vibrant waterfront and bustling festivals. With these warm, humid days, August truly captures the essence of summer in Baltimore, making it a popular time for both relaxation and exploration.

August Weather in Baltimore: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Baltimore, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec363945556474807772624841
Data source: Temperature data for Baltimore 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 Baltimore

August in Baltimore sees significant precipitation, with an average of 143 mm (5.6 in) spread over 16 days—the highest number of rainy days in any month. This consistent rainfall is part of a summer trend, where preceding months like July feature even heavier precipitation at 151 mm (6.0 in), but August stands out for its frequency of rainy days. This pattern underscores the transition from the lush, wet late summer to the dryer, cooler fall months ahead, marked by a notable drop in both precipitation amount and rainy days in September and October. As the city prepares for autumn, August serves as a pivotal month, balancing warmth with ample moisture, allowing for vibrant late-summer foliage and a reminder of nature's cycles.

August Precipitation Trends in Baltimore

The chart displays monthly precipitation patterns in Baltimore, 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.
JanFebMarAprMayJunJulAugSepOctNovDec701179911414510615114311112390116
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Baltimore

In Baltimore, the humidity levels reflect a notable pattern throughout the year, with August experiencing one of the year’s lowest rates at 72%. This marks a gradual decline from the higher humidity levels observed in early summer, where July peaks at 74%. As residents and visitors enjoy the warmth of summer’s end, the comfortable humidity makes August an ideal month for outdoor activities. However, this dip is short-lived; as September approaches, humidity rises again to 75%, signaling the transition back toward the more humid conditions characteristic of late fall, which can reach as high as 85% in November and remain elevated through much of the winter months. This cyclical trend emphasizes Baltimore’s humid subtropical climate, showcasing the city's fluctuations and the comforts of late summer.

August Average Humidity in Baltimore

This chart illustrates the average monthly humidity levels in Baltimore, 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.
JanFebMarAprMayJunJulAugSepOctNovDec84%83%83%81%78%79%74%72%75%81%85%84%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Baltimore

In August, Baltimore experiences a UV Index of 9, categorized as very high, which means sun exposure can lead to sunburn in just 15 minutes. This trend is consistent with the peak summer months—June through July also registering a UV Index of 10. As summer wanes, the UV levels begin to drop, but August still presents considerable risks, making it essential for residents and visitors to stay vigilant with sun protection strategies. While the UV Index decreases slightly in September to 8, the overall theme throughout the summer months is a heightened need for caution under the intense sun. For more insights and updates, check the detailed Baltimore UV Index.

Maximum UV Index Levels in Baltimore for August

The chart shows the monthly maximum UV Index (UVI) for Baltimore 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.
JanFebMarAprMayJunJulAugSepOctNovDec357910101098753
Data source: Baltimore 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 Baltimore

In Baltimore, the month of August shines brightly with 329 hours of sunshine, continuing the summer trend of high sun exposure that began in June and reached its peak in July. This vibrant month is a delightful bridge between the sun-drenched days of summer and the gentle cooling of early fall, as it features a slight dip in sunshine compared to July's impressive 359 hours. As the year progresses, August's radiant days contribute to a gradual decline in sunlight hours that heralds the changing seasons, yet it remains one of the sunniest months, ensuring plenty of opportunities for outdoor activities and enjoyment before the crisp autumn air sets in.

Monthly Sunshine Duration in Baltimore: August Highlighted

The August sunshine duration represents the total number of hours Baltimore 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.
JanFebMarAprMayJunJulAugSepOctNovDec151h182h261h268h297h339h359h329h281h250h226h190h
Data source: Baltimore August Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Baltimore During August

In Baltimore, August tends to offer a 35% chance of sunny weather, which is among the lower probabilities of the year. This trend marks a noticeable dip compared to the sunnier months of March and July, where the chances soar to 53% and 51%, respectively. Interestingly, as summer peaks, August doesn't bask in the same sunlit glory as the preceding months. The likelihood of sunny days begins to rise again in September, hitting 54%, suggesting that summer's end may bring back some clearer skies. Overall, while August can share its fair share of sunshine, it remains one of the cloudier months in Baltimore, implying a transition towards fall.

Percentage of Sunny Days in August in Baltimore

The chart illustrates the percentage of sunny days in Baltimore 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 Baltimore experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec46%28%53%46%40%39%51%35%54%41%55%36%
Data source: Baltimore August chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Baltimore in August

As summer wanes in Baltimore, August brings a gradual shift in daylight, offering about 13 hours of sunlight—a slight decline from the peak brightness of June and July. This transition marks the beginning of the seasonal ebb, where longer days give way to the crisp, shorter daylight hours of fall. The gradual decrease from May's 14 hours to August's 13 hours highlights a natural rhythm of the year, reminding residents that while summer is still in full swing, the days are subtly growing shorter as they inch towards the golden hues of autumn. Following August, September will usher in 12 hours of daylight, continuing this annual pattern, as Baltimore enjoys the last bits of summer before embracing the cozy embrace of fall.

Average Daylight Hours in Baltimore for August

The chart illustrates the variation in daylight duration in Baltimore throughout the year, with August highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 45m10h 43m11h 58m13h 15m14h 19m14h 51m14h 34m13h 36m12h 23m11h 7m10h9h 26m
Data source: Baltimore daylight hours, calculated by summing the hours between sunrise and sunset for each day.

August Winds in Baltimore

In Baltimore, the August winds provide a gentle reprieve from the summer heat, averaging just 2.6 m/s (6 mph), making it the calmest month for breezes. This decline marks a noticeable trend as wind speeds gradually decrease from their early summer peaks, where July holds the title of the lowest average winds at 3.0 m/s (7 mph). Following this lull, the winds start to pick up again in September with an average of 3.5 m/s (8 mph), suggesting that while August may whisper softly, the coming months are ready to invigorate the city with more energetic gusts. As a result, August serves as a tranquil interlude, inviting residents to savor the stillness before the breezy transitions of autumn set in.

Average August Wind Speed in Baltimore

The chart displays monthly wind speed patterns in Baltimore, 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.
JanFebMarAprMayJunJulAugSepOctNovDec3.84.14.14.03.73.33.02.6 m/s3.53.73.93.4
Data source: Baltimore August wind data, generated using information from the Copernicus Climate Change Service.

How August Weather in Baltimore Compares to Other Months

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

August and January present strikingly contrasting weather conditions. In August, temperatures range from a mild 16°C (62°F) at night to a scorching 33°C (92°F) during the day, with an average of 25°C (78°F). This month also sees considerable precipitation, with 143 mm (5.6 in) spread over 16 days, resulting in a humidity level of 72%. Conversely, January is characterized by much colder temperatures, with a minimum of -13°C (9°F) and a maximum of 17°C (63°F), averaging just 2°C (36°F). The winter month receives less rainfall at 70 mm (2.8 in) over 8 days, but has higher humidity at 84%. For more specifics on January weather, you can visit Baltimore weather in January.

August and February present stark contrasts in weather patterns. In August, temperatures range from a mild 16°C (62°F) at night to a warm 33°C (92°F) during the day, accompanied by relatively high humidity at 72%. The month experiences considerable precipitation, averaging 143 mm (5.6 in) over 16 days. In contrast, February's temperatures plummet, with a minimum of -14°C (8°F) and a maximum of 20°C (69°F), leading to an average of just 4°C (39°F). Although it is colder, February has a slightly lower average precipitation of 117 mm (4.6 in) spread over 12 days, along with higher humidity at 83%. These differences highlight the distinct seasonal characteristics of each month. For more information on February weather, visit Baltimore weather in February.

August and March offer contrasting weather experiences. In August, temperatures range from a minimum of 16°C (62°F) to a maximum of 33°C (92°F), with an average of 25°C (78°F). This month also sees considerable humidity at 72% and significant rainfall, averaging 143 mm (5.6 in) over 16 days. In stark contrast, March features much cooler temperatures, with a minimum of -7°C (20°F) and a maximum of 24°C (75°F), averaging 7°C (45°F). March tends to be wetter than August, with 99 mm (3.9 in) of precipitation over 10 days, but slightly higher humidity at 83%. For more details, you can visit Baltimore weather in March.

April and August present contrasting weather patterns. In April, temperatures range from a chilly minimum of 0°C (32°F) to a mild maximum of 27°C (81°F), with an average temperature of 13°C (55°F). Rainfall is relatively moderate, totaling 114 mm (4.5 in) over 11 days, and the humidity is slightly higher at 81%. In comparison, August offers much warmer conditions, with temperatures varying from a low of 16°C (62°F) to a high of 33°C (92°F) and an average of 25°C (78°F). Despite the warmth, it sees more frequent rainfall, totaling 143 mm (5.6 in) over 16 days. Thus, while April embraces cooler and somewhat drier weather, August brings the heat with increased precipitation. For a detailed look at what to expect, you can visit Baltimore weather in April.

August and May present distinct weather patterns. In August, temperatures range from a minimum of 16°C (62°F) to a maximum of 33°C (92°F), averaging at 25°C (78°F), while May offers cooler temperatures with a minimum of 3°C (38°F) and a maximum of 30°C (87°F), averaging 18°C (65°F). Both months experience similar levels of precipitation, with August recording 143 mm (5.6 in) over 16 days and May slightly higher at 145 mm (5.7 in) over 14 days. Humidity is also noteworthy, with August's average at 72% compared to May’s 78%, indicating a slightly more humid atmosphere in the latter month. For a detailed look at the May climate, check out Baltimore weather in May.

In comparing the weather between August and June, August tends to be warmer with average temperatures around 25°C (78°F), peaking at 33°C (92°F), while June's average is slightly cooler at 23°C (74°F) with a maximum of 32°C (90°F). Although both months experience a similar number of days with precipitation, August sees a higher total rainfall of 143 mm (5.6 in) compared to June's 106 mm (4.2 in). Humidity levels are slightly lower in August at 72%, whereas June averages at 79%, indicating a more comfortable atmosphere during the later summer month. For a detailed look at June's weather, you can visit Baltimore weather in June.

Comparing the weather between July and August reveals some notable differences. In July, temperatures ranged from a minimum of 17°C (63°F) to a maximum of 35°C (96°F), with an average temperature of 27°C (80°F). This month also saw slightly more precipitation at 151 mm (6.0 in) over 13 days, accompanied by a humidity level of 74%. August, on the other hand, experienced a minimum temperature of 16°C (62°F) and a maximum of 33°C (92°F), yielding an average of 25°C (78°F). While August had a lower total precipitation of 143 mm (5.6 in), it featured more rainy days, totaling 16, and slightly decreased humidity at 72%. For further details on July's weather, you can check Baltimore weather in July.

August typically presents warmer temperatures than September, with daytime averages reaching around 25°C (78°F) compared to September's average of 22°C (72°F). While August can peak at a scorching 33°C (92°F), September's maximum temperature is slightly lower at 32°C (89°F). Precipitation is more frequent in August, occurring over 16 days with a total of 143 mm (5.6 in), whereas September sees reduced rainfall at 111 mm (4.4 in) over just 10 days. Humidity levels remain relatively high in both months, with August at 72% and September slightly higher at 75%. For more details on the weather specifics, you can check Baltimore weather in September.

August is characterized by warm temperatures, with an average of 25°C (78°F) and maximum highs reaching 33°C (92°F), making it a hot month. It experiences significant rainfall, totaling 143 mm (5.6 in) over about 16 days, and has a humidity level of 72%. In contrast, October ushers in cooler weather, featuring an average temperature of 17°C (63°F) and minimum values dropping down to 4°C (39°F). While October's maximum temperature can also reach up to 32°C (91°F), it generally presents a more temperate climate. October sees slightly less rainfall at 123 mm (4.8 in) spread over 11 days, with humidity rising to 81%. For more details on October's climate, visit Baltimore weather in October.

August and November exhibit stark contrasts in weather characteristics. In August, temperatures range from a minimum of 16°C (62°F) to a maximum of 33°C (92°F), with an average of 25°C (78°F). The month is relatively humid, with an average humidity of 72% and significant precipitation recorded over 16 days, totaling 143 mm (5.6 in). In sharp contrast, November experiences much cooler temperatures, with a minimum of -4°C (26°F), an average of 9°C (48°F), and a maximum of 23°C (73°F). This month sees lower precipitation levels at 90 mm (3.6 in), occurring over just 8 days, and a higher humidity of 85%. For more details, check this link: Baltimore weather in November.

August and December present strikingly different weather patterns. In August, temperatures range from a mild 16°C (62°F) to a scorching high of 33°C (92°F), with an average of 25°C (78°F). The month is relatively humid at 72%, accompanied by significant precipitation on 16 days, totaling 143 mm (5.6 in). In contrast, December experiences a much colder climate, with temperatures dipping as low as -9°C (16°F) and peaking at only 17°C (64°F), averaging around 5°C (41°F). Additionally, it enjoys less rainfall, with 116 mm (4.6 in) over just 9 days and a higher humidity level of 84%. For more information on December weather, you can check Baltimore weather in December.

Compare Baltimore's Climate with Cities Worldwide

Conclusion: What to Expect From August Weather in Baltimore

As summer reaches its peak, August in Baltimore is characterized by warm temperatures and higher humidity levels, distinguishing it from the milder conditions of spring and fall. With average temperatures hovering around a comfortable 25°C (78°F) and maximums occasionally soaring to 33°C (92°F), it's a time when the city experiences its most intense heat. This month also brings a notable amount of rainfall, with 16 days of precipitation, adding a refreshing contrast to the summer sun. Coupled with an average humidity of 72%, August can feel quite muggy. Those planning to visit or explore should be prepared for a mix of sunny days and sudden showers. For a more detailed look at weather patterns throughout the year, check the full guide on Baltimore Climate.