Last updated: February 24, 2025
In Half Moon Bay, United States, August weather offers a delightful mix of mild temperatures and refreshing coastal conditions. With maximum temperatures reaching 24°C (76°F) and an average of 16°C (61°F), it’s the perfect backdrop for outdoor activities. The minimum temperature rarely drops below 11°C (53°F), ensuring comfortable evenings. Notably, the region enjoys zero precipitation days this month, with only 3 mm (0.1 in) recorded, allowing for plenty of sunshine and clear skies. Coupled with an average humidity of 87%, the coastal charm invites visitors to explore its scenic beauty while basking in the pleasant weather.
In August, Half Moon Bay enjoys delightful temperatures that mark a peak in summer comfort. With a minimum of 11°C (53°F) and a maximum reaching 24°C (76°F), the weather creates a harmonious balance for outdoor activities and beach outings. The average temperature settles at a pleasant 16°C (61°F), which reflects a gradual warming trend as the summer progresses from June’s cooler 15°C (58°F) to the warmer highs of August. This month offers a perfect opportunity to savor the coastal charm of the area, as temperatures remain consistently mild, making it an ideal time for both visitors and locals to embrace the coastal lifestyle amidst a backdrop of stunning ocean vistas.
In August, Half Moon Bay experiences a significant slowdown in precipitation, with only 3 mm (0.1 in) of rain recorded across the month, marking it as one of the driest periods of the year. Notably, August shares this minimal rainfall with the preceding months of July and September, which also see virtually no rain, leading to a stretch of zero precipitation days during this summer season. This trend highlights the region's characteristic dry spell, contrasting sharply with the wetter months of January and February, where the cumulative precipitation peaks at over 100 mm. As the year progresses towards October, residents can expect a gradual return of rain, rekindling the lush beauty of the coast after the dry summer.
In August, Half Moon Bay experiences a notable peak in humidity, maintaining a level of 87%, which aligns with the trend set in July. This summer humidity is slightly elevated compared to the early months of the year, where figures ranged from 85% in January to 79% in April. Following August, September sees a slight dip to 86%, marking the start of the transition into a more moderate fall climate. Throughout the rest of the year, humidity gradually decreases, showcasing a cyclical pattern where summer months remain consistently more humid than their winter counterparts, which stay around the 79% mark. This progression not only highlights the coastal influences on Half Moon Bay's weather but also sets the stage for the comforting yet dynamic atmosphere typical of this charming seaside locale.
In August, Half Moon Bay experiences a UV Index of 10, categorizing the exposure as very high with a burn time of just 15 minutes. This showcases a slight decline from the intense summer peak of 11 observed in both June and July, but it remains a crucial period for sun safety. Interestingly, this trend indicates that as summer progresses, while the intensity slightly diminishes, the risks of prolonged UV exposure stay significant. Visitors and residents alike should stay vigilant, given the consistent high UV readings throughout the summer months, especially with the index still hovering above 9 before easing in September. For detailed insights on UV exposure trends throughout the year, check out Half Moon Bay UV Index.
UV Risk Categories
Half Moon Bay basks in a radiant embrace of sunshine throughout the year, with August offering a remarkable 320 hours of golden rays. This month, while slightly less sunny than the peak found in June (355 hours), still stands out as a delightful summer retreat. Following the trend from May to August, the sun-soaked days gradually decline from the summer peak, yet they remain significantly brighter compared to the winter months. As the year progresses into September, hours of sunlight dip to 299, marking the end of summer's vibrant light. This rhythm reflects a typical coastal climate, where long, sunlit days in summer transition into the more subdued days of fall, painting a beautiful portrait of seasonal change.
In Half Moon Bay, the likelihood of sunny weather in August hovers around 43%, reflecting a moderate chance of clear skies as summer peaks. This marks a slight decline from July, which experiences the sunniest conditions with only 30% sunshine. Interestingly, the sunny probabilities fluctuate throughout the year, with the highest chances occurring in late winter and early spring—60% in March and 56% in February. While August provides warmer temperatures and vibrant coastal scenery, residents and visitors alike should prepare for a mix of sun and fog, as the weather can shift dramatically into the fall months, where September (47%) and October (50%) offer a return to clearer days. This trend illustrates Half Moon Bay's distinctive coastal climate, where sunshine is cherished but never guaranteed, inviting exploration regardless of the weather.
In August, Half Moon Bay experiences a delightful 13 hours of daylight, marking the gradual transition from the sun-drenched days of summer to the cooler embrace of autumn. As we reflect on the year’s progression, it's evident that the longest daylight stretches peak in June and July, each boasting 14 hours, setting a vibrant stage for outdoor adventures. Yet, as August unfolds, the daylight begins to wane, signaling nature's shift towards shorter days. This month seamlessly bridges the warmth of summer and the crisp arrival of fall, inviting residents to relish the remaining long evenings before the days shrink further in September to 12 hours. The gentle ebb and flow of daylight throughout the year paints a beautiful picture of seasonal change, encouraging a deeper appreciation for each moment spent basking in the sun’s glow.
In August, Half Moon Bay experiences a gentle breeze, with an average wind speed of 3.3 m/s (7 mph), marking one of the calmer months of the year. This follows a modest increase in wind strength through the spring and early summer months, peaking in May at 5.4 m/s (12 mph) before gradually diminishing in July and hitting its lowest in August. Notably, this trend of declining wind speeds continues into the falling months of September and November, suggesting a seasonal shift towards more tranquil weather as summer gives way to autumn. Overall, August serves as a serene transition, inviting visitors to bask in the mild coastal air, perfect for leisurely days by the beach.
The weather in Half Moon Bay 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 Half Moon Bay and find detailed weather information for every month.
When comparing the weather in August and January, notable differences emerge. August boasts warmer temperatures ranging from a minimum of 11°C (53°F) to a pleasant maximum of 24°C (76°F), with an average of 16°C (61°F). This month typically enjoys dry conditions, receiving only 3 mm (0.1 in) of precipitation over zero rainy days and humidity levels around 87%. In contrast, January sees cooler temperatures, with a minimum of 5°C (41°F) and a maximum of 20°C (68°F), averaging 11°C (53°F). This winter month experiences significantly more precipitation, totaling 102 mm (4.0 in) over approximately 9 rainy days, while maintaining a similar humidity level of 85%. For a more detailed outlook, you can refer to Half Moon Bay weather in January.
August and February present contrasting weather patterns in Half Moon Bay. In August, the temperatures range from a mild minimum of 11°C (53°F) to a pleasant maximum of 24°C (76°F), with very little precipitation at just 3 mm (0.1 in) and no rainy days, resulting in a high humidity level of 87%. In contrast, February experiences cooler temperatures with a minimum of 5°C (41°F) and a maximum of 20°C (69°F). This month sees significantly more rain, accumulating 101 mm (4.0 in) over 9 rainy days, accompanied by a slightly lower humidity of 82%. For a more detailed look at what February has to offer, you can check Half Moon Bay weather in February.
In comparison, August experiences milder temperatures with a minimum of 11°C (53°F) and an average of 16°C (61°F), peaking at a maximum of 24°C (76°F). The month is notably dry, with only 3 mm (0.1 in) of precipitation and no rainy days, alongside a high humidity level of 87%. Conversely, March sees cooler temperatures, with a minimum of 7°C (44°F) and an average of 12°C (53°F), reaching a maximum of 19°C (67°F). It is significantly wetter, recording 77 mm (3.0 in) of precipitation over 11 days, while maintaining a slightly lower humidity level of 82%. For more details, check Half Moon Bay weather in March.
When comparing the weather in April and August, notable differences emerge. In April, temperatures range from a minimum of 7°C (45°F) to a maximum of 25°C (78°F), with an average of 12°C (55°F). The month is characterized by higher precipitation, averaging 34 mm (1.3 in) over approximately 5 rainy days, and a relative humidity of 79%. In contrast, August boasts a milder temperature range of 11°C (53°F) to 24°C (76°F), with an average of 16°C (61°F). It is markedly drier during this month, receiving only 3 mm (0.1 in) of precipitation over zero rainy days and featuring a higher humidity at 87%. For more details on how the weather varies in April, check out Half Moon Bay weather in April.
In comparing the weather of August and May, August generally experiences warmer temperatures, with averages reaching up to 16°C (61°F) and maximums of 24°C (76°F), compared to May's average of 13°C (56°F) and maximum of 21°C (69°F). Additionally, August is notably drier, with only 3 mm of precipitation and no rainy days, while May sees more moisture with 22 mm of precipitation over two days. Humidity levels are slightly higher in August at 87%, compared to May's 83%. This contrast highlights August's more stable and pleasant weather conditions, making it an ideal time for outdoor activities. For more detailed weather patterns, you can check Half Moon Bay weather in May.
In comparing the weather of August and June, both months exhibit relatively mild temperatures, but August tends to be slightly warmer overall. August sees average temperatures ranging from a minimum of 11°C (53°F) to a maximum of 24°C (76°F), while June maintains a slightly cooler profile with temperatures ranging from 10°C (51°F) to a maximum of 27°C (81°F). Precipitation is minimal in both months, with August receiving only 3 mm (0.1 in) and June slightly higher at 4 mm (0.2 in), although both report no rainy days. Humidity levels are also similar, with August at 87% and June at 84%, indicating a comfortable yet slightly more humid atmosphere in August. For more detailed information, you can refer to Half Moon Bay weather in June.
In comparing the weather of July and August, it's evident that August tends to be slightly warmer. The average temperature in August reaches 16°C (61°F), while July has a cooler average of 15°C (59°F). Additionally, August boasts a higher maximum temperature of 24°C (76°F) compared to July’s maximum of 20°C (69°F). Both months experience the same level of precipitation at 3 mm (0.1 in) and have no rainy days, and humidity remains consistent at 87%. For a detailed look at July's weather, you can refer to Half Moon Bay weather in July.
August and September share similar minimum temperatures, with August averaging 11°C (53°F) and September maintaining a slightly lower minimum of 11°C (52°F). Both months have an average temperature of around 16°C (61°F), but September experiences a notable increase in maximum temperatures, reaching 31°C (88°F) compared to August's 24°C (76°F). Precipitation levels remain consistent for both months, with only 3 mm (0.1 in) recorded and no rainy days. Humidity is similarly high, at 87% in August and slightly lower at 86% in September. For more details about the weather during this time, check out Half Moon Bay weather in September.
When comparing the weather between August and October, we see some notable differences. August tends to be milder, with average temperatures ranging from a minimum of 11°C (53°F) to a maximum of 24°C (76°F), accompanied by low precipitation and high humidity at 87%. On the other hand, October experiences slightly cooler minimum temperatures at 9°C (49°F) and an average of 15°C (60°F), but can reach higher maximums of 27°C (80°F). Notably, October also has increased precipitation, totaling 27 mm (1.1 in) over two days, and lower humidity at 80%. For more insights on what to expect, check out Half Moon Bay weather in October.
In comparing the weather of August and November, it's clear that August generally offers warmer temperatures, with daily averages around 16°C (61°F) and maximums reaching up to 24°C (76°F). In contrast, November sees a drop in both average and maximum temperatures, averaging 13°C (56°F) and peaking at 21°C (70°F), with a minimum of 7°C (45°F). Additionally, August is characterized by very little precipitation, often experiencing dry conditions, while November brings more rainfall, averaging 48 mm (1.9 in) over about five days. Humidity levels are slightly higher in August at 87%, compared to November's 79%. For more detailed insights, check Half Moon Bay weather in November.
The weather in August is generally warmer and drier compared to December. August features milder temperatures, with minimums around 11°C (53°F) and maximums reaching 24°C (76°F), all while enjoying minimal precipitation at just 3 mm (0.1 in) over zero days, accompanied by high humidity of 87%. In contrast, December sees cooler temperatures, with a range from a minimum of 6°C (44°F) to a maximum of 19°C (67°F). Additionally, December is much wetter, receiving 92 mm (3.6 in) of precipitation over 10 days and slightly lower humidity at 79%. For more details on the December weather, you can check Half Moon Bay weather in December.
In August, Half Moon Bay basks in a pleasant Mediterranean climate, characterized by relatively warm temperatures that contrast with the cooler coastal months. With average highs reaching a mild 24°C (76°F) and minimal rainfall—just 3 mm across the month—August presents a remarkable dry spell, allowing for ample sunshine and outdoor activities. The high humidity, hovering around 87%, keeps the coastal air refreshing, distinguishing this month from the cooler and wetter seasons that precede and follow it. For those looking to explore more about Half Moon Bay's weather patterns throughout the year, visit Half Moon Bay Climate.