Last updated: February 24, 2025
In August, Houston experiences a sizzling summer with temperatures soaring to a maximum of 38°C (100°F), while the average hovers around 29°C (84°F), providing a warm backdrop for outdoor activities. Nights offer a mild respite, with temperatures dipping to a minimum of 21°C (70°F). However, the city also witnesses considerable precipitation, totaling 201 mm (7.9 in) over 19 days, contributing to the humid atmosphere with an average humidity of 68%. This combination of warmth and moisture defines the lively character of Houston's August, where sunshine and unexpected rains coexist, prompting residents and visitors alike to adapt and enjoy the vibrancy of the season.
In Houston, August brings a sizzling climax to summer, with temperatures soaring to an impressive average of 29°C (84°F). The month marks a transition from the peak heat of July, where the mercury can hit a scorching 38°C (100°F), to slightly cooler, yet still warm conditions as September approaches. Overnight lows typically hover around 21°C (70°F), ensuring sultry nights that often call for refreshing escapes. This consistent warmth throughout August illustrates Houston's characteristic humid subtropical climate, setting the stage for outdoor adventures, vibrant city life, and the ever-looming possibility of late-summer thunderstorms. Whether lounging by the pool or exploring the city's diverse attractions, August's heat invites residents and visitors alike to embrace the season’s long, sun-soaked days.
In August, Houston experiences a significant uptick in precipitation, averaging 201 mm (7.9 in) over 19 days, marking it as one of the wettest months of the year. This notable spike follows the already substantial rainfall from July and is only slightly overshadowed by September's 202 mm (8.0 in), indicating a trend of heightened moisture during the late summer months. Such intense rainfall patterns, driven by tropical systems, reflect the city's vulnerability to heavy storms, underscoring the importance of preparedness as the summer heat begins to wane. With these conditions, the lushness of the region's vegetation is nurtured, but the increased wet days can also lead to challenges in urban drainage and flood management.
In August, Houston experiences a noticeable dip in humidity, averaging 68%, which marks the lowest point of the year. This decrease follows a gradual decline from the previous months, where humidity levels were consistently higher, peaking at 81% in February and hovering around the 70s through the spring and early summer. As the summer winds down, the air gradually becomes less oppressive, providing a brief respite before humidity levels start to climb again in September and beyond. This trend highlights a shift in the seasonal climate, as Houston transitions towards the cooler months while still retaining a hint of lingering summer warmth.
In August, Houston experiences a UV Index of 11, placing it in the extreme exposure category with a burn time of just 10 minutes. This trend follows a summer pattern, with July and June also recording the highest indexes at 12. Notably, April and May also maintain an extreme classification, suggesting that the peak of summer intensifies sun exposure risks. As the year progresses, the UV Index begins to taper off in September, dropping to 10, signaling a return to very high levels. Residents and visitors should be vigilant and take protective measures during this sweltering month. For more details, check the Houston UV Index.
UV Risk Categories
August in Houston is a sun-soaked delight, boasting 322 hours of glorious sunshine. This month follows a remarkable trend seen throughout the summer, where daylight hours have consistently peaked. Starting from a modest 173 hours in January, sunshine steadily increases, hitting its zenith in July with 328 hours. Although August experiences a slight dip, it remains one of the sunniest months of the year, outshined only by the July peak. As the summer transitions into fall, September also holds strong with 278 hours, ensuring that Houstonians can bask in warm rays well into early autumn. This consistent abundance of sunlight fosters a vibrant outdoor lifestyle, making summer a cherished season in the heart of Texas.
August in Houston sees a 28% chance of sunny weather, marking it as one of the least favorable months for sunshine throughout the year. This trend aligns with the increasing cloud cover typical of mid-summer, following an already low 26% in July. Interestingly, as the seasons transition into fall, the likelihood of clear skies significantly improves, with September seeing a rebound to 47% and October reaching an even brighter 51%. Thus, while August may not offer many sunny days, the promise of clearer weather is just around the corner as summer fades.
In August, Houston basks in approximately 13 hours of daylight, mirroring the longer days of June and July. This mid-summer brightness is a significant highlight of the month, as daylight gradually starts to wane with the approach of fall. Following the peak of 14 hours in June, August's sunlight fosters a vibrant, outdoor atmosphere, perfect for enjoying the warm weather. As the transition into September approaches, daylight will begin to decrease, reflecting the natural cyclical patterns of the seasons. The consistency in daylight during these summer months underscores Houston's inviting climate, making August a time of abundant sunshine and longer evenings.
In Houston, August brings a noticeable lull in wind activity, with average speeds dipping to just 2.2 m/s (5 mph). This trend marks a continuation of the summer's calm conditions, as July experiences even lighter breezes at 2.1 m/s (5 mph). Comparatively, the earlier months of the year feature steadier winds, hovering around 3.6 m/s to 4.0 m/s (8-9 mph) from January through April. As the seasons transition towards fall, September witnesses a slight uptick to 2.5 m/s (6 mph), hinting at a return to more refreshing breezes. Overall, the August winds reflect the warm summer months, suggesting a gentle, laid-back atmosphere that characterizes this time of year in Houston.
The weather in Houston 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 Houston and find detailed weather information for every month.
August and January present starkly contrasting weather conditions. In August, temperatures soar with a minimum of 21°C (70°F) and average highs reaching up to 29°C (84°F), culminating in sweltering peaks of 38°C (100°F). This month also records significant rainfall, with 201 mm (7.9 in) falling over 19 days, contributing to a humidity level of 68%. In contrast, January offers a much cooler climate, with temperatures dipping to a minimum of -7°C (19°F) and averaging around 13°C (55°F), while highs can reach 28°C (83°F). Precipitation is considerably less frequent in January, totaling 91 mm (3.6 in) over just 9 days, and the humidity is slightly higher at 78%. For a more detailed look at the winter weather, check out Houston weather in January.
August and February present stark contrasts in weather conditions. August boasts significantly warmer temperatures, with a minimum of 21°C (70°F) and an average reaching 29°C (84°F), peaking at a scorching 38°C (100°F). The month also sees considerable rainfall, with 201 mm (7.9 in) spread across 19 days, and a humidity level of 68% that can make the heat feel even more intense.
In contrast, February offers a cooler climate, with temperatures ranging from a minimum of -12°C (11°F) to an average of 14°C (58°F), and a maximum of 30°C (86°F). Precipitation is less frequent, totaling 95 mm (3.8 in) over 14 days, with higher humidity at 81%. For more insights into February weather in Houston, check out Houston weather in February.
August and March present striking contrasts in weather. In August, temperatures soar with an average of 29°C (84°F) and highs reaching up to 38°C (100°F), while the humidity sits at a warm 68%. The month is also characterized by significant rainfall, totaling 201 mm (7.9 in) over 19 days. In contrast, March boasts milder temperatures, with an average of 19°C (66°F) and maximums of 30°C (87°F), but starts off much colder with minimums dipping to -1°C (31°F). Precipitation in March is lower at 86 mm (3.4 in) across 13 days, accompanied by higher humidity levels at 76%. For a detailed look at March weather, check out Houston weather in March.
When comparing the weather in August and April, significant differences emerge. August is characterized by much warmer temperatures, with averages reaching 29°C (84°F) and high spikes of up to 38°C (100°F), while April enjoys milder conditions, averaging 21°C (70°F) with maximums of 32°C (90°F). Additionally, August experiences nearly double the precipitation, with 201 mm (7.9 in) spread over 19 days, compared to April's 94 mm (3.7 in) over just 11 days. Humidity levels are also notable; April is more humid at 79%, versus August’s 68%. For a detailed look at Houston's weather in April, you can visit Houston weather in April.
When comparing the weather in August and May, we see notable differences in temperature and humidity. August is significantly warmer, with an average temperature of 29°C (84°F), peaking at a scorching 38°C (100°F), while May has a more moderate average of 25°C (77°F) and a maximum of 34°C (93°F). Precipitation is also a factor, as August experiences more rainfall with 201 mm (7.9 in) over 19 days compared to May's 176 mm (6.9 in) over 16 days. Interestingly, May has higher humidity at 79%, compared to August's 68%, making the earlier month feel more muggy. For more details, you can check out Houston weather in May.
In comparing June and August weather, some distinct differences emerge. August tends to be hotter, with average temperatures reaching 29°C (84°F) and maximums soaring up to 38°C (100°F), while June has a slightly cooler average of 28°C (82°F) and max temperatures of 35°C (95°F). Additionally, August experiences more precipitation, totaling 201 mm (7.9 in) over 19 days, compared to June's 171 mm (6.7 in) across 17 days. However, June has higher humidity at 74%, while August's levels are around 68%. For more detailed insights, you can check out Houston weather in June.
August tends to be slightly warmer than July, with average temperatures reaching 29°C (84°F) compared to July's 28°C (83°F). The maximum temperatures also peak higher in August at 38°C (100°F), while July's maximum is 37°C (99°F). However, August experiences significantly more rainfall, with 201 mm (7.9 in) of precipitation over 19 days, compared to July's 146 mm (5.8 in) over 16 days. Humidity levels are marginally lower in August at 68% versus 71% in July. For more detailed information, you can check Houston weather in July.
In comparing the weather between August and September, August tends to be hotter with average temperatures reaching up to 29°C (84°F) and maximums soaring to 38°C (100°F). In contrast, September sees a drop in minimum temperatures to 13°C (55°F) and an average of 27°C (80°F). Both months experience similar levels of precipitation, with August recording 201 mm over 19 days and September slightly higher at 202 mm over 15 days. Interestingly, September has a slightly higher humidity level at 73%, compared to August's 68%. For more detailed insights, you can refer to Houston weather in September.
August and October present a sharp contrast in weather patterns. In August, temperatures soar with averages around 29°C (84°F), peaking at a sweltering 38°C (100°F), while the humidity hovers at a considerable 68%. The month also experiences significant rainfall, accumulating 201 mm (7.9 in) across 19 days. In contrast, October brings a cooler climate, with average temperatures dropping to 22°C (73°F) and maximums reaching 34°C (93°F). Although October is wetter with 104 mm (4.1 in) of precipitation over 12 days, the overall atmosphere feels less oppressive, with humidity slightly higher at 75%. For more detailed insights, you can check Houston weather in October.
August and November present striking contrasts in weather conditions. In August, temperatures soar with a minimum of 21°C (70°F) and an average of 29°C (84°F), reaching as high as 38°C (100°F). This month also experiences substantial rainfall, with 201 mm (7.9 in) of precipitation spread over 19 days, combined with a humidity level of 68%. In stark contrast, November brings cooler temperatures, with a minimum of -1°C (30°F) and an average of 17°C (63°F), peaking at 31°C (88°F). Precipitation is significantly reduced to 82 mm (3.2 in) over just 10 days, alongside a higher humidity of 78%. For more details on the weather patterns in November, visit Houston weather in November.
The weather in August is marked by high temperatures, with averages around 29°C (84°F) and peaks reaching up to 38°C (100°F), making it one of the hottest months of the year. In contrast, December brings much cooler temperatures, with an average of 14°C (58°F) and a maximum of 28°C (83°F), highlighting a significant seasonal shift. While August experiences considerable rainfall averaging 201 mm (7.9 in) over 19 days, December sees reduced precipitation at 111 mm (4.4 in) over just 9 days, despite a higher humidity level of 84%. For those interested in a deeper dive into December weather patterns, Houston weather in December provides further insights.
As summer reaches its peak in Houston, August transforms the city into a sweltering oasis with some of the year's highest temperatures and humidity levels. Unlike the milder temperatures of the spring and fall months, residents can expect days filled with intense heat, often exceeding 38°C (100°F), paired with an average of 68% humidity that keeps the air thick and humid. Additionally, this month's frequent rainfall, with nearly 20 days of precipitation, adds an unexpected twist to the typically scorching days. With such variability, those familiar with Houston's weather know that August can demand both resilience and adaptability. For a deeper understanding of how Houston’s climate unfolds throughout the year, visit Houston Climate.