Last updated: February 24, 2025
In August, Tucson experiences sweltering temperatures, with maximums soaring to 42°C (108°F) and an average of 31°C (87°F), while nighttime lows offer a slight reprieve at 20°C (69°F). Despite the intense heat, the month sees some precipitation—approximately 35 mm (1.4 in) over 8 days, providing brief moments of relief. Moreover, the humidity, averaging 48%, adds a layer of complexity to the weather, making the warmth feel more pronounced. As the summer transitions towards fall, Tucson's August weather is a blend of hot days, occasional rains, and a characteristic desert charm.
In August, Tucson swelters under the summer sun, where temperatures reach their zenith. The month starts off warm with minimums around 20°C (69°F), setting a foundation for daytime highs that peak at a scorching 42°C (108°F). Despite consistent day warmth, the average temperature of 31°C (87°F) hints at the oppressive heat typical of a desert climate. As summer transitions into fall, these high temperatures mirror the trends seen from June through July, where maximums fluctuate only slightly, maintaining a vibrant, albeit hot, atmosphere. This period of intense warmth makes Tucson a perfect setting for evening activities as the evenings cool down, albeit marginally, creating an ideal backdrop for stargazing under the expansive desert sky.
In August, Tucson experiences a notable increase in precipitation, measuring 35 mm (1.4 in) over 8 days—a significant uptick compared to the preceding arid months. This pattern marks a mid-summer peak, with rainfall doubling from July's total of 54 mm (2.1 in) spread across 10 days. As the monsoon season unfolds, the consistent summer heat gives way to thunderstorms that quench the parched landscape, nurturing a lush vibrancy in the desert environment. Following August, the precipitation begins to taper, leading into September with a decrease in both amount and frequency. This trend highlights the transient nature of Tucson’s monsoon, where bursts of rain invigorate the region before the dry season resumes.
In Tucson, the humidity levels tell a vivid story throughout the year, with a noticeable decline from the winter months into summer. Starting at a high of 76% in January, the air becomes progressively drier, reaching a low of just 33% in June and 34% in July. Interestingly, as August rolls in, humidity begins to rise again, settling at 48%. This uptick suggests a transitional shift as the region approaches the onset of fall. By September, humidity jumps to 64%, indicating a return of moisture in the air, followed by even higher levels in the subsequent months. Overall, the data reveals a clear trend: Tucson's arid summer gives way to more humid conditions as the year advances toward autumn.
In August, Tucson experiences a notably high UV Index of 11, falling into the extreme exposure category, with a burn time of only 10 minutes for unprotected skin. This trend of extreme UV levels intensifies as summer peaks, following a gradual rise from a moderate index of 5 in January to highs of 12 in June and July. August maintains this intensity, reminding residents and visitors alike to prioritize sun safety during their outdoor activities. As the UV levels remain elevated, it's crucial to be aware of protection measures to enjoy the warm desert sun safely. For more in-depth information, visit Tucson UV Index.
UV Risk Categories
In Tucson, August shines brightly with an impressive 340 hours of sunshine, continuing the summer’s trend of abundant sunlight. Following the peak of 371 hours in both May and June, the city enjoys a slight dip in July’s 354 hours before leveling out in August. This pattern highlights Tucson’s consistently sunny climate, particularly in the summer months. As the year progresses, the sun gradually begins to wane, with September seeing 312 hours and October dropping further to 300 hours. Nevertheless, despite the eventual reduction in sunny days, Tucson maintains its reputation as a glorious sun-soaked destination for most of the year, inviting both locals and visitors to bask in its warm embrace.
In Tucson, August brings a 55% chance of sunny weather, making it one of the more variable months in the yearly cycle. Following the highs of May (88%) and the steep drop in July (34%), August seems to settle into a transition period as the summer begins to wane. While the sun still shines on many days, the likelihood of cloudier skies increases compared to the earlier summer months. This shift mirrors the overall trend of summer ending in Tucson, where the sunny probabilities begin to pick up again in September (66%) and maintain a respectable 81% as autumn sets in during October.
In August, Tucson experiences about 13 hours of daylight, maintaining the longer daylight trend established in the summer months. This duration is on par with July, highlighting the tail end of the sun-drenched season, where days are gradually starting to shorten as the year progresses. Following this month, September sees a slight decline in daylight to 12 hours, signaling the transition towards fall. Overall, the trend from January to August reflects a steady increase in daylight hours, peaking in June at 14 hours, before settling into the gradual decrease that characterizes the latter part of the year. This rhythmic ebb and flow of daylight not only marks the changing seasons but also enriches Tucson's vibrant outdoor lifestyle.
In August, Tucson experiences a gentle breeze, with an average wind speed of 2.1 m/s (5 mph), making it one of the calmer months alongside September. This slight dip in wind velocity, following a gradual decline from the more blustery months of March through May (peaking at 3.3 m/s or 7 mph), reflects the transition into the latter part of summer. July also saw a decrease, dipping to 2.2 m/s, suggesting that as the heat intensifies, the winds tend to ease. Overall, Tucson's wind patterns in summer showcase a trend toward tranquility, providing a serene environment ideal for enjoying the warm desert evenings.
The weather in Tucson 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 Tucson and find detailed weather information for every month.
August and January exhibit stark contrasts in weather. August features high temperatures with an average of 31°C (87°F) and peaks reaching up to 42°C (108°F), while January experiences milder conditions, with an average of 11°C (53°F) and a maximum of 25°C (77°F). Precipitation is relatively higher in August, with 35 mm (1.4 in) falling over 8 days, compared to January's 23 mm (0.9 in) over just 3 days. Humidity also varies significantly; August has a lower humidity level at 48%, whereas January tends to be much more humid, averaging 76%. For more details on January weather, check out this link: Tucson weather in January.
August and February present contrasting weather patterns. August experiences a warm climate with temperatures ranging from a minimum of 20°C (69°F) to a scorching maximum of 42°C (108°F), accompanied by average humidity at 48%. Despite some heat, precipitation occurs over eight days, totaling 35 mm (1.4 in). In sharp contrast, February features a much cooler environment, with temperatures spanning from a minimum of -3°C (27°F) to a maximum of 29°C (84°F). The month sees higher humidity at 79%, and precipitation is relatively minor, falling over just four days for a total of 34 mm (1.3 in). For more detailed insights, you can check Tucson weather in February.
August and March exhibit striking contrasts in weather patterns. In August, temperatures soar with a minimum of 20°C (69°F) and average highs reaching up to 31°C (87°F), peaking at an intense 42°C (108°F). The month sees some rainfall, with about 35 mm (1.4 in) over approximately 8 days, while humidity averages 48%. On the other hand, March experiences much cooler conditions, with temperatures ranging from a chilly 1°C (33°F) to a pleasant average of 16°C (62°F), and highs that don’t surpass 33°C (92°F). Precipitation is lighter in March, totaling around 15 mm (0.6 in) over just 3 days, accompanied by higher humidity levels averaging 67%. For a more detailed look at March weather, you can visit Tucson weather in March.
In comparing the weather of August and April, it's evident that August is significantly hotter, with average temperatures reaching 31°C (87°F) and maximums soaring to 42°C (108°F). In contrast, April enjoys milder conditions, with an average temperature of 22°C (71°F) and a maximum of 37°C (98°F). Additionally, August experiences more variability in precipitation, receiving 35 mm (1.4 in) over eight rainy days, while April is notably dry with only 2 mm (0.1 in) and no rain at all. Humidity levels are also slightly higher in April at 55%, compared to 48% in August. For more detailed insights, check out Tucson weather in April.
The weather in August is significantly warmer than in May, with average temperatures soaring to around 31°C (87°F) compared to May's more moderate 25°C (78°F). August experiences much higher maximum temperatures, reaching up to 42°C (108°F), while May peaks at 40°C (104°F). Additionally, August sees more humidity at 48%, compared to 40% in May, contributing to a more oppressive heat. Precipitation is also notably higher in August, with 35 mm over 8 days, whereas May only receives 3 mm over a single day. For more details on May weather, you can check out Tucson weather in May.
When comparing the weather in August to June, both months feature similar average temperatures around 31°C (88°F). However, August experiences higher minimum and maximum temperatures, with lows of 20°C (69°F) and highs reaching up to 42°C (108°F), contrasting with June's lower minimum of 17°C (62°F) and slightly higher maximum of 44°C (111°F). Additionally, August is characterized by more humidity at 48%, compared to June's drier atmosphere with only 33% humidity. Precipitation is more frequent in August, with 35 mm (1.4 in) over 8 days, while June remains exceptionally dry with just 8 mm (0.3 in) and no rainy days at all. For more detailed insights on June weather, you can visit Tucson weather in June.
In comparing August and July weather, both months exhibit similar temperature ranges, with minimum temperatures consistently around 20°C (69°F) and average temperatures hovering near 31°C (87°F). However, July tends to be a touch hotter, with a maximum temperature reaching up to 43°C (110°F), compared to August's peak of 42°C (108°F). Precipitation levels also differ, with July experiencing significantly more rain at 54 mm (2.1 in) over 10 days, while August sees only 35 mm (1.4 in) across 8 days. Additionally, humidity levels are notably higher in August at 48%, in contrast to July's lower 34%. For a more detailed overview, you can explore Tucson weather in July.
August typically brings warmer temperatures, with average highs reaching 31°C (87°F) and occasional peaks of 42°C (108°F), while September sees a slight cool down, with average highs of 28°C (83°F). Interestingly, September's minimum temperature dips to 13°C (56°F) compared to August's minimum of 20°C (69°F). Precipitation also varies; August experiences 35 mm (1.4 in) over 8 days, while September has less rainfall at 27 mm (1.1 in) over just 3 days. Additionally, September tends to be more humid, with humidity levels rising to 64% compared to August's 48%. For more detailed information, you can check the Tucson weather in September.
August and October exhibit significant contrasts in weather conditions. August is characterized by high temperatures, with a minimum of 20°C (69°F) and average peaks reaching 31°C (87°F), occasionally soaring up to a scorching 42°C (108°F). This month also sees higher humidity levels at 48% and more frequent rainfall, with a total of 35 mm (1.4 in) spread over 8 days. In contrast, October brings a much cooler climate, with minimum temperatures dropping to 4°C (39°F) and an average of 23°C (73°F), while the maximum can still reach 38°C (100°F). October experiences significantly less precipitation at just 10 mm (0.4 in) over 2 days but has a higher humidity level of 67%. For more detailed insights, you can check Tucson weather in October.
August and November present stark contrasts in weather, showcasing the transition from the hot summer to a milder fall. In August, temperatures soar with averages around 31°C (87°F) and highs reaching up to 42°C (108°F), accompanied by a relatively low humidity of 48%. Rainfall is modest, with about 35 mm (1.4 in) over 8 days. In contrast, November sees a significant drop in temperatures, with average highs of 17°C (64°F) and minimums falling to 2°C (36°F). The month is characterized by higher humidity levels at 77% and much less precipitation, totaling just 14 mm (0.6 in) over only 1 day. For a closer look at what to expect, check out Tucson weather in November.
August and December in Tucson present two starkly contrasting weather experiences. In August, temperatures soar, with averages around 31°C (87°F) and highs reaching up to 42°C (108°F), while humidity remains relatively moderate at 48%. The month sees about 35 mm (1.4 in) of precipitation spread over eight days, providing some relief from the heat. In contrast, December brings cooler conditions with average temperatures of 12°C (54°F) and lows dipping to -2°C (29°F). December's precipitation is slightly lower at 27 mm (1.0 in) over just four days, but the humid atmosphere increases to 82%. For more detailed insights, check out Tucson weather in December.
In August, Tucson experiences a unique blend of warmth and occasional rain, setting it apart from the drier months of summer. With daytime temperatures peaking around 42°C (108°F) and an average of 31°C (87°F), the heat can be intense, yet the evenings offer a pleasant cool down to 20°C (69°F). This month marks a transition as monsoon thunderstorms begin to roll in, bringing about 35 mm of rain over approximately 8 days, which provides a welcome relief from the dry Arizona heat. The humidity levels rise to 48%, creating a more tropical feel compared to the typically arid climate of the earlier summer months. For a deeper dive into what to expect throughout the year, check out the Tucson Climate information.