August Weather in Grant Park, United States

Last updated: February 24, 2025

In August, Grant Park experiences a warm and humid climate, with maximum temperatures soaring up to 35°C (95°F) and an average of 23°C (74°F), providing an ideal backdrop for summer activities. While the minimum temperature can drop to 11°C (52°F) during the night, residents and visitors alike can expect lush greenery owing to a total precipitation of 92 mm (3.6 in) across approximately 11 days. The air is often thick, with a humidity level hovering around 81%, adding to the vibrant atmosphere of the park during this lively month.

August Temperature in Grant Park

In August, Grant Park experiences a warm embrace, with temperatures peaking at a sizzling 35°C (95°F), perfectly contrasting the icy depths of winter. The month starts off on a mild note, with lows averaging around 11°C (52°F), which sets the stage for pleasant summer evenings. Overall, the average temperature stabilizes at a comfortable 23°C (74°F), making it one of the hottest months of the year. This warmth is part of a noticeable trend; as the seasons progress from January's frigid lows to the balmy heights of July and August, we see a steady ascent in warmth that culminates in the summer's peak. The transition to September then ushers in cooler days, reminding us of the cyclical nature of Grant Park’s climate.

August Weather in Grant Park: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Grant Park, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec272940506273767368554034
Data source: Temperature data for Grant Park 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 Grant Park

In August, Grant Park experiences a notable dip in precipitation, with an average of 92 mm (3.6 in) of rainfall spread over 11 days. This marks a slight decrease from the wetter months of late spring and early summer, suggesting a transition toward drier conditions as autumn approaches. Following a peak in May with 161 mm of precipitation, the rainfall trend gradually declines, reflecting a seasonal shift that many residents and visitors likely feel. Despite the reduced precipitation, August still holds a significant amount of rain compared to the earlier months of the year, indicating that while summer storms may lessen, there remains a consistent, if slightly moderated, presence of moisture in the air.

August Precipitation Trends in Grant Park

The chart displays monthly precipitation patterns in Grant Park, 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.
JanFebMarAprMayJunJulAugSepOctNovDec6971951201611249892771356459
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Grant Park

In Grant Park, August brings a slight dip in humidity to 81%, continuing a trend of relatively high levels throughout the summer months. After peaking in the spring with an 85% average in April, humidity begins to stabilize in the summer, with July at 80% and August close behind. This consistent moisture in the air creates a characteristic warmth, drawing in both locals and tourists seeking the lush beauty of summer. As we transition into September, humidity drops slightly to 80%, hinting at the onset of fall, but remains significantly higher than the colder months ahead. The overall trend illustrates a pattern of increased humidity during the first half of the year, making Grant Park a vibrant and lush destination amidst its seasonal shifts.

August Average Humidity in Grant Park

This chart illustrates the average monthly humidity levels in Grant Park, 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.
JanFebMarAprMayJunJulAugSepOctNovDec82%83%84%85%79%82%80%81%80%82%88%84%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Grant Park

In August, Grant Park experiences a UV Index of 9, categorized as very high, which necessitates caution when enjoying outdoor activities, as the burn time is a mere 15 minutes. This trend marks a slight decrease from the peak of 10 in June and July, yet it continues to reflect the intense summer sun. Compared to earlier months, like March with an index of 6 and a burn time of 25 minutes, it's clear that UV exposure risks remain significant throughout the summer months. As the season transitions into September, the UV Index will gradually decline, but awareness and protection from harmful rays remain essential during this time. For more details on managing UV exposure year-round, check out Grant Park UV Index.

Maximum UV Index Levels in Grant Park for August

The chart shows the monthly maximum UV Index (UVI) for Grant Park 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.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098642
Data source: Grant Park 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 Grant Park

In August, Grant Park basks in the warmth of 334 hours of sunshine, marking a slight dip from July's peak of 353 hours but still showcasing the vibrant summer atmosphere that defines the season. This month, with nearly 30 hours less sun than July, illuminates a transition period, hinting at the approaching fall while still holding onto the lingering warmth of summer. As daylight begins to wane, the drop in sunshine hours becomes more pronounced in September, falling to 287 hours, yet August remains a time of abundant light, enjoying the fruits of a sun-drenched summer. The gradual decline in sunlight across the months emphasizes a rhythm of seasonal change, encouraging both residents and visitors to relish every sun-soaked moment before the autumn coolness sets in.

Monthly Sunshine Duration in Grant Park: August Highlighted

The August sunshine duration represents the total number of hours Grant Park 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.
JanFebMarAprMayJunJulAugSepOctNovDec116h172h226h244h284h329h353h334h287h223h189h179h
Data source: Grant Park August Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Grant Park During August

In Grant Park, the month of August stands out with a 45% chance of sunny weather, tying it with March. This is part of a broader trend where the summer months generally see a rise in sunshine, with July and June hovering just below this mark at 43% and 42%, respectively. Interestingly, as the seasons transition, the likelihood of sunny days begins to climb significantly, spiking to 59% in September, providing a delightful segue into fall. Overall, August offers a promising opportunity for enjoying the outdoors, but as the season arrives at its peak, it's wise to stay prepared for the occasional cloud.

Percentage of Sunny Days in August in Grant Park

The chart illustrates the percentage of sunny days in Grant Park 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 Grant Park experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec25%31%45%40%33%42%43%45%59%33%46%38%
Data source: Grant Park August chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Grant Park in August

In Grant Park, United States, August marks a gentle shift in daylight duration as summer gives way to the approaching fall. With 13 hours of daylight, August maintains a robust glow, though slightly less than the sun-drenched days of June and July, which enjoy their peak at 15 and 14 hours respectively. As the year progresses, daylight gradually recedes; following August is September's 12 hours, indicating nature's subtle transition. This rhythmic fluctuation showcases a clear seasonal trend, from the brisk vitality of spring with 11 hours in March to the cozy embrace of winter, where daylight dwindles to just 9 hours in December. Embracing this cycle, August captures the essence of late summer, inviting longer evenings and the anticipation of autumn's arrival.

Average Daylight Hours in Grant Park for August

The chart illustrates the variation in daylight duration in Grant Park throughout the year, with August highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 34m10h 37m11h 58m13h 20m14h 30m15h 5m14h 46m13h 44m12h 24m11h 2m9h 50m9h 14m
Data source: Grant Park daylight hours, calculated by summing the hours between sunrise and sunset for each day.

August Winds in Grant Park

In Grant Park, August brings a noticeable decline in wind speed, averaging a gentle 2.7 m/s (6 mph)—the lowest point for the year. This summer softness contrasts sharply with the more spirited months that precede it; both March and November see much higher averages around 4.6 m/s (10 mph) and 4.2 m/s (9 mph), respectively. During the early summer months, particularly June (3.4 m/s) and July (3.0 m/s), winds remain mild but are still relatively stronger than August's calm. As the year transitions into the fall, wind speeds begin to rebound, illustrating a curious seasonal pattern where summer's stillness gives way to autumn's breezy revival. The August air offers a serene atmosphere, perfect for leisurely strolls through the park, capturing the essence of summer's gentle farewell.

Average August Wind Speed in Grant Park

The chart displays monthly wind speed patterns in Grant Park, 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.
JanFebMarAprMayJunJulAugSepOctNovDec3.84.44.64.03.63.43.02.7 m/s3.83.64.24.3
Data source: Grant Park August wind data, generated using information from the Copernicus Climate Change Service.

How August Weather in Grant Park Compares to Other Months

The weather in Grant Park 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 Grant Park and find detailed weather information for every month.

August and January present striking contrasts in weather. In August, temperatures range from a comfortable minimum of 11°C (52°F) to a scorching maximum of 35°C (95°F), with an average of 23°C (74°F). The month sees considerable humidity at 81%, along with 92 mm (3.6 in) of precipitation over 11 days. Conversely, January experiences frigid conditions, where temperatures can drop as low as -30°C (-22°F), with an average of -3°C (27°F) and a maximum of 17°C (63°F). Though it is drier, January still sees 69 mm (2.7 in) of precipitation over 8 days and a similar humidity level at 82%. For a specific look at January conditions, you can check out the details here: Grant Park weather in January.

August and February present stark contrasts in weather conditions. In August, temperatures range from a minimum of 11°C (52°F) to a scorching maximum of 35°C (95°F), with an average temperature of 23°C (74°F). The month experiences 92 mm (3.6 in) of precipitation over 11 days, accompanied by high humidity levels of 81%. In contrast, February showcases a much colder climate, with temperatures dipping as low as -31°C (-24°F) and peaking at 21°C (70°F), averaging -2°C (29°F). This month sees less precipitation, totaling 71 mm (2.8 in) over 10 days, but maintains a similar humidity level of 83%. For a detailed look at February's weather, visit Grant Park weather in February.

The weather in August and March presents a striking contrast. In August, temperatures soar with a minimum of 11°C (52°F) and a maximum reaching 35°C (95°F), averaging around 23°C (74°F), while humidity remains high at 81%. Precipitation is notable, with 92 mm (3.6 in) expected over 11 days. In contrast, March experiences much colder temperatures, featuring a low of -18°C (-1°F) and a high of 26°C (80°F), averaging only 5°C (41°F). However, precipitation remains similar, with 95 mm (3.7 in) falling over 12 days and humidity slightly higher at 84%. For more details on the specific weather conditions in March, you can check Grant Park weather in March.

In comparison, August enjoys warmer temperatures with a minimum of 11°C and an average of 23°C, peaking at a maximum of 35°C, while April experiences a significant chill, starting from a low of -7°C and averaging only 10°C, with highs reaching 29°C. Precipitation levels are slightly lower in August at 92 mm over 11 days compared to April's 120 mm over 13 days, indicating a wetter spring season. Interestingly, both months exhibit high humidity, with August at 81% and April slightly higher at 85%. For more detailed information on April weather, check out Grant Park weather in April.

In comparing the weather of August and May, August typically enjoys warmer temperatures with an average of 23°C (74°F), peaking at 35°C (95°F), while May experiences cooler averages at 17°C (62°F), with a maximum of 34°C (94°F). However, May sees a greater amount of precipitation, totaling 161 mm (6.3 in) over 15 days, compared to August's 92 mm (3.6 in) over just 11 days. Humidity levels are slightly higher in August at 81%, compared to 79% in May. For more detailed information, check out Grant Park weather in May.

When comparing the weather in August and June, we see some similarities and differences. Both months have an average temperature of around 23°C (74°F), with maximums reaching up to 35°C (95°F) on the hottest days. However, August typically experiences slightly lower precipitation, averaging 92 mm (3.6 in) over 11 days, compared to June, which has higher rainfall at 124 mm (4.9 in) across 13 days. The humidity levels are also quite comparable, with August at 81% and June at 82%. For more detailed information, you can check out Grant Park weather in June.

In comparing the weather of August and July, we observe some subtle differences. August typically sees slightly lower minimum temperatures at 11°C (52°F) compared to July's 13°C (56°F), while the average temperature in August is nearly identical at 23°C (74°F) versus July's 24°C (76°F). The maximum temperature in August reaches up to 35°C (95°F), which is just a tad higher than July's maximum of 34°C (94°F). Precipitation levels are fairly close, with August receiving 92 mm (3.6 in) over 11 days, while July has slightly more at 98 mm (3.9 in) over 12 days. Humidity remains relatively high in both months, with August at 81% and July slightly lower at 80%. For more detailed weather specifics, you can check Grant Park weather in July.

August tends to be warmer and more humid than September, with average temperatures reaching 23°C (74°F) and maximums peaking at 35°C (95°F). In contrast, September experiences a slight drop in temperature, averaging 20°C (69°F) with a maximum of 34°C (94°F). While August sees more precipitation (92 mm) over 11 days, September offers a slightly drier climate with 77 mm of rain over just 8 days, maintaining a comparable humidity level of 80%. For more detailed information on September weather, check out Grant Park weather in September.

August and October present stark contrasts in weather patterns. In August, temperatures range from a mild 11°C (52°F) at night to a sweltering 35°C (95°F) during the day, accompanied by high humidity at 81%. The month experiences occasional rain, totaling about 92 mm (3.6 in) over 11 days. Conversely, October brings cooler temperatures with a minimum of -3°C (28°F) and an average of 13°C (56°F), with daytime highs reaching 31°C (89°F). Precipitation increases to 135 mm (5.3 in) across 13 days, and humidity remains slightly elevated at 82%. For more detailed information on October weather, check out Grant Park weather in October.

August and November present a stark contrast in weather conditions. In August, temperatures range from a minimum of 11°C (52°F) to a sweltering maximum of 35°C (95°F), with an average temperature of 23°C (74°F). The month is relatively humid at 81% and experiences about 92 mm (3.6 in) of precipitation over 11 days. In comparison, November sees a significant drop in temperatures, with a minimum reaching -13°C (9°F) and an average of only 4°C (40°F), although it can peak at a milder 25°C (78°F). Precipitation decreases to 64 mm (2.5 in) over 8 days, and the humidity rises slightly to 88%. For more detailed weather information specific to November, you can visit Grant Park weather in November.

The weather in August contrasts sharply with that of December. In August, temperatures can soar with averages around 23°C (74°F) and highs reaching up to 35°C (95°F), accompanied by relatively high humidity at 81%. This month also sees considerable precipitation, with about 92 mm (3.6 in) falling over 11 days. In stark contrast, December experiences a much colder climate, with average temperatures plummeting to 1°C (34°F) and nighttime lows dropping to -20°C (-5°F). While precipitation is lower at 59 mm (2.3 in) over just 7 days, the humidity remains high at 84%. For more detailed insights into December's weather, you can visit Grant Park weather in December.

Compare Grant Park's Climate with Cities Worldwide

Conclusion: What to Expect From August Weather in Grant Park

As August rolls in, Grant Park experiences a distinct shift in weather that sets it apart from other months. The temperatures soar, reaching peaks that can make the average day feel quite warm and inviting, while the nights offer a cooler reprieve. However, with an increased likelihood of rain, the month brings along a surge in humidity, adding a tropical touch to the summer atmosphere. It’s a time when the landscape thrives, lush from the 92 mm of rainfall over 11 days, enhancing the park’s beauty. If you're keen to explore what makes Grant Park’s climate unique throughout the year, be sure to check out Grant Park Climate.