Last updated: August 21, 2025
In August, Shimabara, Japan, experiences a striking blend of heat and humidity, with maximum temperatures soaring to 39°C (102°F) and an average of 29°C (85°F). Nighttime brings a welcome reprieve, with temperatures dropping to a comfortable 20°C (68°F). However, the month is also marked by substantial rainfall, accumulating to 303 mm (11.9 in) over 14 days, contributing to a high humidity level of 91%. This climatic combination creates a unique atmosphere, ideal for those who appreciate the vibrancy of summer showers amidst the sultry heat.
In Shimabara, Japan, August sizzles with a notable warmth, reflecting the peak of summer. With minimum temperatures around 20°C (68°F), the days warm up significantly, reaching averages of 29°C (85°F) and soaring to a maximum of 39°C (102°F). This intense heat is a striking contrast to the winter months, where January temps dip as low as -2°C (29°F). As summer transitions into autumn, one can observe the gradual cooling in September, highlighting a pattern where temperatures gradually rise from the chilly air of winter to the sultry embrace of summer. August stands out as a climactic point in this seasonal progression, inviting both locals and travelers to bask in its warm embrace.
In August, Shimabara experiences a substantial precipitation amount of 303 mm (11.9 in), marking a notable dip from the torrential rains of July, which recorded an impressive 475 mm (18.7 in). Rain falls on about 14 days, providing a mix of wet and dry spells, while the cumulative rainfall for the summer months illustrates a clear trend of heavy precipitation that peaks in July and remains significant into August. This transition signifies the tail end of the rainy season, with August being pivotal in replenishing local water sources, setting the stage for drier autumn months ahead. Overall, the patterns of moisture in Shimabara reflect the region's vibrant, yet challenging, climate dynamics throughout the year.
In August, Shimabara experiences a notable peak in humidity, with levels averaging 91%. This marks a slight decrease from the sweltering 92% recorded in July, yet it remains one of the most humid months of the year. As summer progresses, the humidity tends to rise steadily, starting from 75% in January and culminating in the sticky heights of late summer. Following August, the humidity begins to taper off, dropping to 84% in September and gradually cooling down into the autumn months. This trend illustrates the transitional climate of Shimabara, where summer's oppressive moisture gives way to more comfortable conditions as the seasons change.
In August, Shimabara experiences a peak UV Index of 12, categorizing it as extreme and reducing the burn time to just 10 minutes. This trend of high UV levels marks a continuation from July, where the index also hit 12, emphasizing the necessity for sun protection during these summer months. Following the upward trajectory starting from February, which saw a UV Index of 6, the escalating values culminate in a significant risk of overexposure. As we transition into September, the UV Index slightly drops to 11, but remains in the extreme category. It's crucial for residents and visitors alike to stay informed and take necessary precautions during this time. For more detailed information, visit Shimabara UV Index.
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In August, Shimabara shines the brightest, basking in a remarkable 300 hours of sunlight, the highest of the year. This peak is a delightful contrast to the winter months, where sunlight hours hover around 180 to 234 hours. As spring warms up, March and April enjoy a steady increase, with hours reaching 264 and 282 respectively, signaling more cheerful days ahead. The summer months maintain this upward trend, with July contributing a solid 267 hours before August hits its stride. As autumn approaches, sunlight begins to wane slightly, with September and October seeing a drop to 257 and 258 hours. Overall, the sunshine in Shimabara not only brightens its summer but also highlights a dynamic rhythm throughout the year, surely energizing all who experience it.
In August, the likelihood of sunny weather in Shimabara, Japan drops to 27%, marking one of the lower points in the year. This trend is reflective of the transition from the typically warmer summer months, where July boasts a mere 20% chance of sunshine, to the more promising weather of October, which sees an impressive 64% chance of sun. Despite the heat, the prevalence of rainy days and overcast skies during this time can often overshadow the sunshine, making it a time for sporadic bursts of clarity amid the summer humidity. As the month progresses, residents and visitors alike look forward to the return of more reliable sunny days in the fall.
As summer reaches its zenith in August, Shimabara enjoys a generous 13 hours of daylight, providing ample opportunity for outdoor activities and exploration of the region’s stunning landscapes. This month marks a slight decline from the peak daylight duration of 14 hours experienced in both June and July. Following this sunlit interlude, daylight gradually diminishes as September and October approach, returning to 12 hours and 11 hours, respectively. The shifts in daylight throughout the year reflect the rich seasonal changes of Shimabara, inviting residents and visitors alike to cherish each moment of sunshine before the shorter days of autumn set in.
In August, the average wind speed in Shimabara, Japan reaches a gentle 2.7 m/s (6 mph), much like the preceding month of July. This slight increase from the mid-summer lull indicates a consistent breeziness that characterizes the season without becoming overwhelming. Notably, as the year progresses from June's calmest period of 1.6 m/s (4 mph) to the lively winds of August, there is a gradual upward trend in wind speed during the summer months. However, as autumn approaches, the wind speeds tend to decrease slightly again, highlighting a seasonal rhythm that gives Shimabara its unique charm. Overall, the winds during August are refreshing, making it an ideal time for outdoor activities amidst the warm summer days.
Weather in Shimabara varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Shimabara, focusing on differences in temperature, rainfall, humidity, and UV levels.
August and January present a stark contrast in weather conditions. In August, temperatures range from a minimum of 20°C (68°F) to a scorching maximum of 39°C (102°F), with an average of 29°C (85°F). The month also brings considerable precipitation, totaling 303 mm (11.9 in) over 14 days, and high humidity levels at 91%. In contrast, January is much cooler, with temperatures dipping as low as -2°C (29°F) and averaging around 8°C (46°F), peaking at 19°C (66°F). Precipitation is significantly lower in January, with only 53 mm (2.1 in) over 6 days and humidity at 75%. For more detailed information, visit Shimabara weather in January.
The comparison between August and February weather reveals stark contrasts in both temperature and precipitation. August experiences much warmer temperatures, with a range from a minimum of 20°C (68°F) to a maximum of 39°C (102°F), coupled with high humidity levels of 91%. In contrast, February is significantly cooler, with temperatures ranging from -2°C (29°F) to 22°C (71°F), and an average temperature of only 8°C (48°F). While August sees a substantial amount of rainfall, totaling 303 mm (11.9 in) over about 14 days, February has much less precipitation, amounting to 92 mm (3.6 in) over 9 days. For more detailed insights on February weather, refer to Shimabara weather in February.
In August, the weather is characterized by high temperatures, with a minimum of 20°C (68°F), an average of 29°C (85°F), and peaks reaching up to 39°C (102°F). This month is also marked by significant humidity at 91% and frequent rainfall, totaling 303 mm (11.9 in) over approximately 14 days. In contrast, March presents much cooler temperatures, with a minimum of 3°C (37°F) and an average of 12°C (55°F), while a maximum of 24°C (76°F) brings a pleasant warmth. Precipitation in March is lower, with 145 mm (5.7 in) falling over about 11 days, and humidity sits at a more comfortable 71%. For a detailed look at March weather, visit Shimabara weather in March.
August and April present stark contrasts in weather conditions. While August boasts high temperatures ranging from a minimum of 20°C (68°F) to a scorching maximum of 39°C (102°F) with an average of 29°C (85°F), April offers a much cooler climate, with temperatures ranging from 5°C (41°F) to a maximum of 29°C (84°F) and an average of 16°C (62°F). The summer month of August is also characterized by significant precipitation, totaling 303 mm (11.9 in) over 14 days at high humidity levels of 91%, whereas April sees considerably less rain, with 135 mm (5.3 in) falling over just 8 days and humidity at a more moderate 78%. For more detailed insights, you can check Shimabara weather in April.
In comparing the weather of August and May, it's clear that August is significantly warmer, with average temperatures soaring to 29°C (85°F) and a maximum reach of 39°C (102°F), contrasted with May's milder averages of 21°C (69°F) and a peak of 30°C (86°F). Additionally, August experiences a higher level of humidity at 91%, compared to May's 84%, contributing to a more oppressive feel during the summer month. Precipitation in August also exceeds that of May, with 303 mm (11.9 in) falling over 14 days, compared to 214 mm (8.4 in) over 12 days in May. For more details about the weather patterns in May, you can explore Shimabara weather in May.
When comparing the weather in June and August, it's clear that August is significantly warmer, with average temperatures reaching 29°C (85°F) compared to June's 24°C (75°F). August also boasts higher maximum temperatures, peaking at 39°C (102°F) versus June's 32°C (90°F). Precipitation levels are slightly greater in August at 303 mm (11.9 in) over 14 days, while June sees 262 mm (10.3 in) over 15 days. Additionally, humidity is notably higher in August at 91%, compared to June’s 86%, making the summer months feel even more intense. For a detailed look at June weather in this region, you can check Shimabara weather in June.
The weather in August is characterized by slightly higher average temperatures compared to July, with an average of 29°C (85°F) in August, as opposed to 27°C (82°F) in July. Additionally, August experiences a maximum temperature of 39°C (102°F), which is notably higher than July's peak of 37°C (99°F). However, despite the warmer temperatures in August, it has significantly less rainfall, with 303 mm (11.9 in) over 14 days compared to July's 475 mm (18.7 in) over 19 days, indicating that July is generally wetter. Humidity levels remain consistent, with 91% in August and 92% in July. For more detailed weather information, you can visit Shimabara weather in July.
In August, temperatures soar with a minimum of 20°C (68°F) and an average of 29°C (85°F), reaching a maximum of 39°C (102°F). However, it's also a month that sees significant rainfall, with precipitation totaling 303 mm (11.9 in) over 14 days, contributing to high humidity levels at 91%. In contrast, September experiences a more moderate climate, with minimum temperatures dropping to 16°C (62°F) and an average of 25°C (78°F), peaking at 35°C (94°F). While September still sees rainfall—228 mm (9.0 in) on 15 days—the humidity decreases to 84%, creating a more comfortable atmosphere. For more specific weather details in September, you can check Shimabara weather in September.
August and October reveal a striking contrast in weather conditions. In August, the temperatures soar with a minimum of 20°C (68°F) and can reach up to a sweltering 39°C (102°F), accompanied by high humidity at 91%. Additionally, this month experiences significant rainfall, accumulating 303 mm (11.9 in) over 14 days. In comparison, October's climate is notably cooler, with temperatures ranging from a minimum of 10°C (50°F) to a maximum of 33°C (91°F) and an average of 21°C (69°F). While it is still humid, the level decreases to 83%. Rainfall is also less frequent in October, totaling around 120 mm (4.7 in) over just 9 days. For more detailed information, you can refer to Shimabara weather in October.
August and November present a stark contrast in weather conditions. August experiences much warmer temperatures, with a minimum of 20°C (68°F) and an average high of 39°C (102°F), making it one of the hottest months of the year. In contrast, November sees cooler temperatures, with a minimum of 3°C (38°F) and an average maximum of 25°C (78°F). Additionally, August is characterized by high humidity at 91% and significant rainfall, accumulating 303 mm over 14 days, while November is drier with only 80 mm of precipitation over 8 days at a slightly lower humidity of 81%. For more details on November weather specifics, you can check out Shimabara weather in November.
August and December present starkly contrasting weather conditions. In August, temperatures soar with a minimum of 20°C (68°F) and an average high reaching 39°C (102°F), creating a hot and humid atmosphere with high precipitation levels of 303 mm (11.9 in) over 14 days. Humidity remains quite high at 91%, making the air feel even warmer. In contrast, December offers a significantly cooler climate, with temperatures ranging from a chilly minimum of 0°C (33°F) to a pleasant maximum of 24°C (76°F) and an average of 10°C (49°F). Precipitation decreases to 89 mm (3.5 in) spread over just 7 days, and humidity also drops to 79%. The seasonal shift highlights the dramatic differences in weather experienced in these two months. For more details, you can check Shimabara weather in December.
August in Shimabara is characterized by scorching temperatures and high humidity, setting it apart from the milder months surrounding it. With averages hitting around 29°C (85°F) and occasional peaks soaring to a sweltering 39°C (102°F), the heat can be quite intense. This month also sees significant rainfall, with approximately 303 mm falling over 14 days, adding to the oppressive atmosphere. The combination of high humidity (around 91%) and considerable precipitation creates a unique tropical climate that distinctly defines August. For more detailed insights into Shimabara's climate throughout the year, visit Shimabara Climate.