Last updated: August 21, 2025
Experience the hot and humid summers of Niigata, Japan, where August showcases temperatures ranging from a sizzling maximum of 35°C (95°F) to a cozy minimum of 20°C (68°F), with an average of 27°C (81°F). This month is characterized by significant precipitation, receiving 247 mm (9.7 in) over approximately 15 rainy days, contributing to the region's high humidity levels of 92%. Visitors and locals alike should prepare for both the heat and the chance of rain as they navigate the vibrant summer landscape of this coastal city.
In August, Niigata, Japan, experiences some of its warmest temperatures of the year, marked by a minimum of 20°C (68°F) and soaring to a maximum of 35°C (95°F). The month's average temperature settles comfortably at 27°C (81°F), with this warmth mirroring the broader trend of rising temperatures from June through July, where the mercury begins its climb from a pleasant 20°C (69°F) to peak. The consistent warmth finds a slight contrast with the cooler August nights, but overall, this month stands out for its vibrant summer atmosphere, appealing to both locals and visitors alike. As temperatures transition into September, a notable drop occurs, hinting at the refreshing arrival of autumn just around the corner.
In August, Niigata, Japan, experiences a significant amount of precipitation, with 247 mm (9.7 in) falling over 15 days. This places August second only to July, which boasts the highest monthly precipitation at 271 mm (10.7 in). The trend indicates that summer months are notably wetter, with July and August collectively accounting for a substantial portion of the annual rainfall. Despite a slight reduction in the number of rainy days compared to July, August still showcases a robust rainfall pattern, contributing to the region's lush landscapes. As the summer heat persists, the abundant rainfall not only sustains the vibrant greenery but also sets the stage for the upcoming transition into the cooler, wetter months of September and October.
During the summer months, Niigata, Japan experiences notably high humidity levels, peaking in August at 92%, which mirrors the muggy conditions of July. This trend of elevated humidity begins in June and remains high until September, creating a sultry atmosphere characteristic of the region's summer climate. As the seasons transition into autumn, humidity gradually decreases, falling to 89% in September and further to 87% by October. This gradual decline signals a shift towards milder and more comfortable conditions as the year progresses. Overall, the consistency in high humidity during mid-summer highlights the importance of preparing for the sticky weather that defines this time in Niigata.
In August, Niigata experiences its peak UV Index of 11, categorized as extreme. This mirrors the intense conditions seen in July, where the Index reached the same level, suggesting a trend of heightened sun exposure during the summer months. During this time, the burn time drops to a mere 10 minutes, underscoring the urgency for protective measures against harmful UV rays. As the summer progresses into September, the UV Index decreases to 9, returning to very high levels, but still maintains the caution needed for sun safety. For more insights on UV exposure throughout the year, visit Niigata UV Index.
UV Risk Categories
August in Niigata, Japan, is a true highlight of the year, basking in 311 hours of glorious sunshine. This vibrant month stands out as the peak of the summer season, following a steady climb in sunlight from the winter's mere 140 hours in January. As the days grow longer, sunshine hours surge, with each month leading up to August revealing a consistent upward trend. From 246 hours in March to an impressive 308 hours in May, the warmth of summer envelops the region. Even as daylight begins to wane in early autumn, with 260 hours in September, the sun-soaked days of August leave a lasting impression, making it a cherished time for outdoor festivities and beach excursions in this picturesque coastal location.
In Niigata, Japan, the likelihood of sunny weather in August presents a notable trend within the yearly climate patterns. While the chance of sunshine in August stands at 29%, it marks a decline compared to the 46% seen in both July and September. This dip indicates that while summer days are often bright, August is slightly less reliable for sun-seekers. The preceding months illustrate a gradual increase in sun chances leading to July, but as summer wanes into August, residents and visitors alike might want to prepare for a mix of sun and clouds, keeping in mind that October subsequently offers a 38% chance, making it an interesting transition into fall.
In Niigata, Japan, the daylight duration exhibits a beautiful progression throughout the year, peaking in late spring and summer. In August, the day stretches to a generous 13 hours, slightly shorter than the longest days of summer but still offering ample sunlight for outdoor adventures. This month reflects a gradual decrease that begins in June, where the longest daylight duration is recorded at 14 hours. As summer transitions to autumn, daylight hours slowly wane to 12 hours in September and further decline into the shorter days of October and November. This rhythmic dance of sunlight not only marks the seasons but also creates a vibrant backdrop for activities and experiences unique to each time of year.
In August, the wind in Niigata, Japan begins to pick up slightly, with an average speed of 3.4 m/s (8 mph). This marks a subtle rise from the stagnant breezes of the preceding summer months in June and July, which both recorded lower winds of 2.7 m/s (6 mph). As the year progresses, we start to see a gradual increase in wind speeds, making August a transitional month that prepares the region for the more invigorating gusts of September and beyond. Interestingly, while the summer months tend to have calmer winds, the arrival of late summer hints at a refreshing shift, signaling the approach of autumn and the dynamic weather changes that accompany it.
Weather in Niigata varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Niigata, focusing on differences in temperature, rainfall, humidity, and UV levels.
August and January present strikingly different weather patterns. In August, temperatures soar with a minimum of 20°C (68°F) and an average of 27°C (81°F), peaking at a scorching 35°C (95°F). The month is notably humid, at 92%, with significant rainfall reaching 247 mm (9.7 in) over 15 days. In contrast, January brings frigid temperatures, with a minimum of -2°C (28°F) and an average of 5°C (41°F), only climbing to a maximum of 13°C (55°F). January also experiences considerable precipitation, accumulating 178 mm (7.0 in) across 23 days, while maintaining a slightly lower humidity level of 88%. For a detailed look at winter conditions, refer to Niigata weather in January.
August and February present starkly contrasting weather conditions. In August, temperatures typically range from a minimum of 20°C (68°F) to a blistering maximum of 35°C (95°F), with an average of 27°C (81°F). This month also sees significant rainfall, with 247 mm (9.7 in) of precipitation spread over 15 days, creating a lush and humid environment with humidity levels reaching 92%. Conversely, February brings much cooler temperatures, with averages hovering around 5°C (41°F) and a maximum of just 15°C (59°F). The minimum temperature can even dip down to -1°C (31°F), and while January experiences less precipitation overall—131 mm (5.1 in) over 24 days—it still maintains a high humidity level of 86%. For more details on February’s weather in Niigata, you can visit Niigata weather in February.
When comparing the weather in August and March, it is evident that August is significantly warmer. With minimum temperatures around 20°C (68°F) and averages soaring to 27°C (81°F), August can reach highs of 35°C (95°F). In contrast, March temperatures start much lower, with minimums at 0°C (33°F) and averages of only 8°C (46°F), peaking at 17°C (64°F). Precipitation levels also differ; August sees more rain, totaling 247 mm (9.7 in) over 15 days, while March has only 112 mm (4.4 in) across 16 days. Additionally, humidity is notably higher in August at 92% compared to 81% in March, making August feel much more oppressive. For more detailed information about weather conditions, check Niigata weather in March.
When comparing the weather in August and April, there are striking differences in temperature, precipitation, and humidity. August experiences significantly higher temperatures, with a minimum of 20°C (68°F) and an average of 27°C (81°F), peaking at 35°C (95°F). In contrast, April's temperatures are much cooler, ranging from a minimum of 4°C (39°F) to a maximum of 22°C (72°F) with an average of just 11°C (52°F). Precipitation also varies, with August receiving 247 mm (9.7 in) over 15 days, compared to April's 111 mm (4.4 in) over 14 days. Furthermore, humidity is notably higher in August at 92%, while April remains lower at 78%. For a more detailed look at April's weather, check out Niigata weather in April.
When comparing the weather in August and May, the differences are striking. August experiences much higher temperatures, with a minimum of 20°C (68°F) and an average of 27°C (81°F), reaching a maximum of 35°C (95°F). In contrast, May is cooler, with temperatures ranging from a minimum of 8°C (47°F) to an average of 16°C (62°F), peaking at 26°C (79°F). Additionally, August sees significantly more rainfall, totaling 247 mm (9.7 in) over 15 days, compared to May's 108 mm (4.3 in) over just 12 days. The humidity in August is notably higher at 92%, while May has a more comfortable 81%. For more details, check out Niigata weather in May.
In comparing the weather of June and August, it's clear that August is significantly warmer and more humid. While June experiences a cooler average temperature of 20°C (69°F), with a maximum of 28°C (83°F), August sees an increase to an average of 27°C (81°F) and peaks at 35°C (95°F). Additionally, August is notoriously wet, with 247 mm (9.7 in) of rain over 15 days, compared to June's lighter rainfall of 100 mm (4.0 in) over 12 days. The humidity is also higher in August at 92%, compared to June's 88%. For more detailed insights into the weather during this month, you can check Niigata weather in June.
In comparing the weather of August and July, we see some notable differences. August tends to be slightly warmer, with an average temperature of 27°C (81°F) compared to July's 25°C (78°F). The maximum temperatures are quite similar, reaching 35°C (95°F) in August and 34°C (94°F) in July. However, August experiences slightly less precipitation, totaling 247 mm (9.7 in) over 15 days, while July has a higher total of 271 mm (10.7 in) over 16 days. Both months exhibit high humidity levels of 92%. For more detailed information, you can check Niigata weather in July.
In comparing the weather of August and September, August tends to be warmer, with an average temperature of 27°C (81°F) and maximum highs reaching up to 35°C (95°F), while September cools down slightly to an average of 23°C (74°F) and a maximum of 34°C (94°F). Precipitation is more abundant in August, totaling 247 mm (9.7 in) over 15 days, whereas September sees a decrease to 158 mm (6.2 in), also spread across 15 days. Humidity levels remain high in both months, with August at 92% and September at 89%. For more detailed weather patterns, you can visit Niigata weather in September.
August and October offer distinctly different weather experiences. In August, temperatures reach a high of up to 35°C (95°F) with an average of 27°C (81°F), making it one of the warmest months of the year. The humidity is notably high at 92%, contributing to a sultry atmosphere, while the month sees significant rainfall, totaling 247 mm (9.7 in) over 15 days. In contrast, October brings cooler conditions, with temperatures ranging from a minimum of 12°C (53°F) to a maximum of 28°C (82°F) and an average of 18°C (65°F). While it still experiences rainfall with 170 mm (6.7 in) across 16 days, the humidity decreases slightly to 87%. To learn more about weather specifics in October, you can check out Niigata weather in October.
In August, the weather is characterized by warm temperatures, with a minimum of 20°C (68°F) and a maximum reaching 35°C (95°F), resulting in an average of 27°C (81°F). This month also experiences high humidity at 92% and considerable rainfall, with 247 mm (9.7 in) over approximately 15 days. In contrast, November sees a notable drop in temperature, with lows of 4°C (39°F) and highs of 21°C (70°F), averaging just 13°C (55°F). While the month still experiences precipitation, it is reduced to 161 mm (6.3 in) across 20 days, and humidity remains relatively high at 85%. For more detailed insights on November weather in Niigata, visit Niigata weather in November.
In August, the weather is characterized by warm temperatures, with a minimum of 20°C (68°F) and an average of 27°C (81°F), peaking at 35°C (95°F). The humidity is notably high at 92%, and the region experiences significant rainfall, totaling 247 mm (9.7 in) over approximately 15 days. In contrast, December brings much cooler conditions, with temperatures ranging from a minimum of 0°C (33°F) to an average of 7°C (45°F), reaching a maximum of 18°C (65°F). Although December has slightly less precipitation at 226 mm (8.9 in), it is spread over a greater number of days (27 days), and humidity levels are slightly lower at 86%. For more details, you can check Niigata weather in December.
August in Niigata brings a distinct twist to the city's weather, characterized by high temperatures and elevated humidity levels that create a warm and steamy atmosphere. Unlike the milder months of spring and early summer, August often sees maximum temperatures soaring, pushing residents and visitors alike to seek respite from the heat. The frequent rainfall, occurring on about half the days of the month, adds to the humid charm, making lush greenery a prominent feature of the landscape. This unique blend of conditions not only defines August but also sets the stage for a vibrant experience in Niigata. To learn more about the yearly variations in weather, check out Niigata Climate.