Last updated: February 24, 2025
Experience the breathtaking climate of the Grand Canyon in August, where temperatures can soar to a maximum of 38°C (100°F), providing an exhilarating backdrop for outdoor adventures. The average temperature hovers around 26°C (79°F), while the nights offer a cool respite, dipping to a minimum of 13°C (56°F). With only 15 mm (0.6 in) of rainfall spread over 3 days, August remains largely dry, complemented by a comfortable humidity level of 41%. This combination of warmth and low precipitation makes it an ideal time for hiking and exploring the stunning vistas of this natural wonder.
In August, the Grand Canyon experiences warm and inviting temperatures, with minimums around 13°C (56°F) and averages hovering at 26°C (79°F). Days are notably hot, reaching up to 38°C (100°F), making it one of the warmest months of the year. This summer heat builds on the rising trends seen since April, where temperatures gradually climb and peak mid-summer. The warmth of August is ideal for exploring the canyon's breathtaking vistas, though visitors should stay hydrated and seek shade during the hottest parts of the day. The climate shifts dramatically as September approaches, hinting at the cooler days of autumn ahead.
In August, the Grand Canyon experiences a notable shift in its precipitation patterns, with an average of 15 mm (0.6 in) of rain over just three days. This moderate rainfall is part of a transitional period leading into the late summer monsoon season, providing a brief respite from the dry conditions seen in June and early July. Compared to the heavier 48 mm (1.9 in) average in March and the 40 mm (1.6 in) typical in January, August's precipitation is relatively minor, reflecting a decrease in moisture following the peak summer rains. The canyon, known for its dramatic shifts in climate, continues to highlight the delicate balance between dry spells and seasonal storms, making each drop in summer a precious occurrence.
August in the Grand Canyon marks a shift in humidity, rising to 41% after the notably dry summer months of June and July, which recorded their lowest levels at 35% and 33%, respectively. This increase is a precursor to the return of moisture in the fall, contrasting sharply with the high humidity of the winter months, with January hitting a peak of 80%. As the year progresses, humidity gradually rises from summer lows, creating a more comfortable atmosphere compared to the parched heat of mid-summer. Overall, August serves as a transitional month, bridging the dry summer and heralding the approaching autumn's humidity increase.
In August, the UV Index at the Grand Canyon remains high, registering an extreme level of 11. This trend follows a summer of peak UV exposure, with July and June also experiencing the maximum rating of 12. As visitors revel in the stunning landscapes, it's vital to stay vigilant about sun protection, as burn time drops to just 10 minutes under these conditions. The summer months present a clear pattern of soaring UV levels, highlighting the importance of vigilance when enjoying this magnificent outdoor wonder. For more insights on sun safety and UV conditions, check out the Grand Canyon UV Index.
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In the Grand Canyon, August shines brightly with 356 hours of sunshine, continuing the trend of lush summer days typical for this iconic landscape. This month sits comfortably in the twilight of summer, following a peak in June with 379 hours, and only slightly below July's total of 371 hours. As the seasons shift, the sunlight begins to wane in September, dropping to 321 hours. The steady rise from January’s modest 181 hours through spring reflects the gradual approach of summer's warmth, peaking in mid-year before gently descending into autumn. Visitors in August are treated to a vibrant tapestry of colors and light, a perfect backdrop for exploring the canyon's breathtaking vistas.
In August, the Grand Canyon boasts a promising likelihood of sunny weather, with 69% chances of clear skies. Following a peak of summer heat in July, which dips to 43%, August sees a notable rebound, aligning more closely with the sunlit frequencies of spring and early summer months like April (74%) and May (79%). As summer gives way to early autumn, the trend indicates a gradual increase in sunshine, peaking again in September at 77%. Thus, August presents an inviting window for visitors hoping to experience the grandeur of this natural wonder under the brilliance of the sun, making it a delightful time to explore the canyon's stunning vistas.
In August, the Grand Canyon enjoys approximately 13 hours of daylight, a slight dip from the peak summer months of June and July, which bask in a full 14 hours. This gradual reduction in sunlight marks the transition towards fall, following a steady increase from the 10 hours in January and February. The daylight pattern reveals a clear seasonal trend: as the year progresses from winter to summer, daylight hours extend significantly, peaking mid-year before slowly receding. Visitors in August can still revel in ample light to explore the breathtaking landscapes, but as the days get shorter, the vibrant hues of sunset become more pronounced, signaling the beauty of summer's slow farewell.
In the Grand Canyon, August brings a gentle average wind speed of 2.6 m/s (6 mph), perfectly reflecting the calmness of late summer. As the year progresses, wind speeds typically rise from a low of 2.3 m/s in January to the peak of 3.3 m/s in both April and May, creating a refreshing breeze ideal for exploration. However, this trend of increasing winds begins to taper off during the warmer months, with a dip to 2.1 m/s in July followed by a slight uptick in August. This pattern suggests a shift towards more moderate breezes as summer wanes, which can be a welcome relief for hikers and adventurers seeking to soak in the breathtaking vistas without the added intensity of stronger winds. As autumn approaches, the wind speeds stabilized to around 2.8 m/s in October, setting the stage for a serene transition into the cooler months.
The weather in Grand Canyon 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 Canyon and find detailed weather information for every month.
August and January present strikingly contrasting weather conditions. In August, temperatures soar with a minimum of 13°C (56°F) and can reach as high as 38°C (100°F), accompanied by relatively low humidity at 41% and minimal precipitation of 15 mm (0.6 in) spread over just three days. In stark contrast, January experiences frigid conditions, with temperatures plummeting to a minimum of -17°C (2°F) and averaging around 2°C (36°F), while the maximum only climbs to 17°C (63°F). This winter month also encounters higher humidity at 80% and more precipitation, totaling 40 mm (1.6 in) across six days. For a detailed look at January weather, check out Grand Canyon weather in January.
August and February present strikingly contrasting weather conditions. August boasts warm temperatures, with averages around 26°C (79°F) and highs that can reach up to 38°C (100°F), accompanied by low humidity levels of 41% and minimal precipitation of only 15 mm over three days. In stark contrast, February experiences considerably colder temperatures, where averages drop to just 3°C (38°F) and lows can plummet to -16°C (4°F). This month also brings more significant precipitation, totaling 43 mm across seven days, coupled with high humidity at 83%. For those interested in learning more about the winter climate, check out Grand Canyon weather in February.
August and March present starkly contrasting weather conditions. In August, temperatures soar with a minimum of 13°C (56°F), an average of 26°C (79°F), and can reach up to a scorching 38°C (100°F). The month experiences relatively low precipitation, totaling just 15 mm (0.6 in) over about 3 days, accompanied by lower humidity at 41%. In contrast, March is defined by much cooler temperatures, ranging from a minimum of -14°C (7°F) to a maximum of 25°C (78°F), with an average of only 7°C (45°F). This month sees significantly higher precipitation at 48 mm (1.9 in) across about 8 days, and a much higher humidity level at 72%. For more detailed information on weather patterns during this month, check out Grand Canyon weather in March.
When comparing the weather in August and April, a striking contrast emerges. August boasts an average temperature of 26°C (79°F), peaking at a sweltering 38°C (100°F), while April's average is a cooler 13°C (56°F), with a maximum of 30°C (87°F). Precipitation levels are relatively similar, with August receiving 15 mm (0.6 in) over 3 days and April slightly less at 13 mm (0.5 in) over just 2 days. Additionally, humidity levels differ significantly; April is noticeably more humid at 63%, compared to August's 41%, creating a distinctly different atmosphere. For more detailed insights into April's weather, you can check out Grand Canyon weather in April.
August and May present contrasting weather conditions, reflecting a transition from early summer to late summer. In August, temperatures range from a minimum of 13°C (56°F) to a maximum of 38°C (100°F), resulting in an average of 26°C (79°F), whereas May experiences cooler temperatures, with a low of 1°C (34°F) and a high of 34°C (93°F), resulting in an average of 17°C (64°F). Precipitation levels are similar in both months, with August receiving 15 mm (0.6 in) and May slightly higher at 18 mm (0.7 in), both occurring over three days. Humidity is lower in August at 41%, compared to 46% in May, contributing to the distinct feel of each month. For more details on May weather conditions, you can check Grand Canyon weather in May.
In comparing the weather of August and June, August shows warmer average temperatures, ranging from a minimum of 13°C (56°F) to a maximum of 38°C (100°F), while June has a cooler range with a minimum of 7°C (45°F) and an average temperature of 24°C (76°F). Both months can reach similar maximum temperatures, but June tends to be drier, with only 3 mm (0.1 in) of precipitation and no rainy days, unlike August, which experiences 15 mm (0.6 in) over three days. Additionally, humidity levels are slightly higher in August at 41%, compared to June’s 35%. For more detailed information, you can check Grand Canyon weather in June.
In comparing the weather of August and July, both months experience similar minimum temperatures, with a low of 13°C (56°F). However, July tends to be slightly warmer overall, with an average temperature of 26°C (80°F) compared to August's average of 26°C (79°F) and a max temperature of 40°C (105°F) in July versus 38°C (100°F) in August. Precipitation is more frequent in July, totaling 24 mm (1.0 in) over 7 days, while August sees less rain at 15 mm (0.6 in) over just 3 days. Additionally, humidity levels are slightly higher in July at 33%, in contrast to August's 41%. For more detailed information about July conditions, you can check out Grand Canyon weather in July.
August tends to be warmer, with average temperatures reaching a comfortable 26°C (79°F) and highs peaking at 38°C (100°F). The month experiences relatively low humidity at 41% and light precipitation, totaling 15 mm over just three days. In contrast, September brings a noticeable drop in minimum temperatures, falling to 3°C (37°F) at night, while the average temperature settles at 22°C (71°F). Although September still sees max temperatures rise to 37°C (100°F), humidity increases to 59%, creating a different feel in the air. Rainfall is slightly lower in September, with 14 mm also spread over three days. For a detailed look at September's weather, visit Grand Canyon weather in September.
August and October present contrasting weather patterns. In August, temperatures soar with a minimum of 13°C (56°F) and an average of 26°C (79°F), hitting highs of up to 38°C (100°F), making it a warm month with relatively low humidity at 41% and minimal precipitation of 15 mm (0.6 in) over just three days. In stark contrast, October brings cooler temperatures, with a minimum dropping to -6°C (22°F) and an average of 14°C (57°F). The maximum temperature reaches a pleasant 30°C (86°F), but the month is marked by increased humidity at 70% and more precipitation, totaling 23 mm (0.9 in) over four days. This shift highlights the notable transition from the heat of summer to the crispness of autumn. For more details on what to expect, check out Grand Canyon weather in October.
August and November present strikingly different weather patterns. In August, temperatures range from a mild 13°C (56°F) at night to a sweltering 38°C (100°F) during the day, accompanied by low humidity at 41% and minimal precipitation of 15 mm over three days. In contrast, November experiences a significant drop in temperature, with minimums dipping to -8°C (17°F) and an average of only 8°C (47°F). While it's slightly wetter with 19 mm of precipitation over two days, the humidity is much higher at 79%, creating a stark shift in comfort and climate. For more information about weather conditions during this month, you can refer to Grand Canyon weather in November.
In August, the weather is typically warm, with temperatures ranging from a mild 13°C (56°F) at night to a scorching 38°C (100°F) during the day. With an average temperature of 26°C (79°F) and only 15 mm (0.6 in) of precipitation over about three days, the humidity remains relatively low at 41%. In contrast, December brings a dramatic shift, with temperatures plummeting to as low as -16°C (4°F) and averaging just 3°C (37°F). Rainfall increases to 33 mm (1.3 in) over six days, and the humidity rises significantly to 82%. For more detailed insights, check out Grand Canyon weather in December.
As August unfolds at the Grand Canyon, visitors can expect hot and dry conditions, with temperatures significantly higher than other months, often reaching maximums of 38°C (100°F). The average temperature hovers around a comfortable 26°C (79°F) during the day, while nights can cool off to a pleasant 13°C (56°F). Precipitation is minimal, with only a few rainy days, totaling about 15 mm (0.6 in), making this month ideal for those seeking sunshine and outdoor activities. Despite the heat, the relatively low humidity at 41% adds to the comfort of exploring this breathtaking landscape. For a deeper dive into what to expect throughout the year, check out our detailed Grand Canyon Climate page.