Last updated: August 21, 2025
In September, Ibaraki, Japan, experiences a dynamic shift in weather, characterized by maximum temperatures reaching up to 37°C (99°F) and an average of 25°C (78°F), creating a warm yet humid environment. With a minimum temperature of 15°C (59°F), the early fall nights can offer a refreshing contrast. Precipitation is notable this month, with approximately 169 mm (6.7 in) of rain falling over 15 days, contributing to a humidity level of 87%, which can make the air feel even warmer. This combination of warmth and moisture creates a lush backdrop for the vibrant autumn season ahead.
In September, Ibaraki, Japan, experiences a notable transition as the summer heat begins to wane, yielding to a more comfortable climate. With minimum temperatures averaging around 15°C (59°F) and maxing out at 37°C (99°F), the month is characterized by a balanced warmth, making it ideal for outdoor activities. The average temperature sits at a pleasant 25°C (78°F), which encourages locals and visitors alike to enjoy the lingering sunshine before autumn’s chill arrives. This month’s patterns reflect a gradual drop from the sweltering heat of August, as Ibaraki's vibrant landscapes prepare to don their autumn hues, enhancing the beauty of this transitional season.
In September, Ibaraki experiences a notable shift in precipitation, with 169 mm (6.7 in) of rainfall spread across 15 days; this marks a peak in the wet season following the typically intense summer months. After the heavy deluge of July and the substantial precipitation in August, September's rainfall, while less than July's 282 mm, maintains a significant level, ensuring the region remains lush and vibrant. The increase in rainy days from earlier months suggests a gradual transition towards the more moderate climates of October and November, which see a reduction in both total rainfall and precipitation days. This pattern highlights Ibaraki's dynamic weather, emphasizing its character as a region with pronounced seasonal changes.
In September, Ibaraki, Japan experiences a notable humidity level of 87%, characteristic of the late summer transition into autumn. This figure reflects a gradual decrease from the peak humidity of 93% in July, while still remaining relatively high compared to the winter months. As the seasons change, September’s humidity begins to mirror the patterns observed earlier in the year, notably with May's humid conditions also reaching 83%. The lingering moisture in the air hints at the summer's excitement, while the upcoming months promise a slight reprieve as October and November see an expected decline. Overall, September serves as a bridge, smoothly connecting the sultry warmth of summer to the crispness of fall.
As September arrives in Ibaraki, Japan, the UV Index maintains a very high rating of 10, indicating a persistent trend of elevated sun exposure following the intense summer months. With a burn time of 15 minutes, it's crucial for residents and visitors alike to be mindful of sun safety practices. This drop from July’s peak of 12 reveals a slight easing of the extreme conditions, yet it remains important to protect yourself from harmful rays. As autumn approaches, the UV Index begins to decline, transitioning to high levels in October, with a UV Index of 7. For more detailed information on Ibaraki's UV levels and how to stay protected, you can visit Ibaraki UV Index.
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September in Ibaraki, Japan, offers a charming balance of sun, with 242 hours of daylight illuminating the fading warmth of summer. This delightful month follows August’s peak of 305 hours, marking a gentle decline as autumn approaches. Overall, the trend for the year reveals a gradual increase in sunshine from January’s modest 185 hours, culminating in the vibrant summer months, before tapering off again in the cooler fall and winter seasons. Despite this decrease, September remains a bright spot in the calendar, ensuring that residents and visitors can bask in the lingering warmth of the sun as nature begins its transformation.
In Ibaraki, Japan, the likelihood of sunny weather in September stands at a modest 30%, reflecting a subtle shift in the seasonal patterns. This figure is notably lower than the average for the preceding months, where July and August show a dip in sunshine, with 32% and 28% respectively. As the region transitions into autumn, sunny days become less frequent, with September following closely behind June, which exhibits the lowest chance of clear skies at 24%. However, this trend begins to reverse as October approaches, with the sun's return hinted at by a noteworthy 53% likelihood. Thus, while September may not promise the sunniest days, the gradual shift towards brighter October weather offers a glimmer of hope for those seeking sunshine in Ibaraki’s early fall.
As summer fades into early autumn, September in Ibaraki, Japan, sees a notable shift in daylight duration. With 12 hours of sunlight, the month serves as a gentle transition from the longer days of summer—where sunlight stretched to about 14 hours in June and July. This gradual decline signals the approach of autumn, as daylight hours slowly decrease, reaching 11 hours by October. Interestingly, September's daylight mirrors the totals of early spring months, showcasing a rhythmic cycle in nature, where each season gracefully intertwines the warmth of summer's late rays with the promise of autumn’s coziness.
As September arrives in Ibaraki, Japan, the average wind speed settles at a gentle 2.2 m/s (5 mph), mirroring the calm breezes typical for early autumn. This slight decrease from the summer months reflects a broader trend, as the wind tends to soften post-peak summer, where July and August recorded slightly higher speeds. Interestingly, the transition from the sweltering heat of summer to the cooler embrace of autumn creates a refreshing atmosphere, inviting locals and visitors alike to enjoy the outdoors. Such moderate winds continue into October, maintaining the tranquil ambiance of the region as it prepares for the chill of winter.
Weather in Ibaraki varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Ibaraki, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present stark contrasts in weather patterns. In September, temperatures range from a mild 15°C (59°F) at night to a sizzling maximum of 37°C (99°F) during the day, with an average of 25°C (78°F). The month sees significant rainfall, amounting to 169 mm (6.7 in) over 15 rainy days, coupled with high humidity levels of 87%. Conversely, January experiences a drastic drop in temperatures, with nighttime lows plummeting to -3°C (26°F) and daytime highs averaging only 6°C (42°F), peaking at 18°C (64°F). Precipitation is much lower in January, totaling 46 mm (1.8 in) over just 6 days, and humidity is slightly reduced at 82%. This seasonal shift highlights the dramatic changes in climate from the warmth and wetness of September to the cold and drier conditions of January. For more specific insights into January weather, you can refer to Ibaraki weather in January.
In comparing the weather of September and February, it is evident that the two months present striking contrasts. September boasts warm temperatures, with a minimum of 15°C (59°F) and an average high reaching up to 37°C (99°F), coupled with high humidity at 87% and significant rainfall of 169 mm (6.7 in) over 15 days. In contrast, February experiences much cooler conditions, where temperatures drop to a minimum of -3°C (26°F) and average around 6°C (43°F), with a maximum of 20°C (68°F). Precipitation is also reduced in February, totaling 60 mm (2.3 in) over just 6 days, and the humidity levels drop to 79%. For further details on February weather, you can explore Ibaraki weather in February.
September and March present contrasting weather patterns, reflecting the transition from summer to autumn and winter to spring, respectively. In September, temperatures range from a minimum of 15°C (59°F) to a sweltering maximum of 37°C (99°F), with an average of 25°C (78°F). The month also sees significant precipitation, with about 169 mm (6.7 in) falling over 15 days and high humidity at 87%. In contrast, March experiences much cooler temperatures, with a minimum of -1°C (31°F) and a maximum of 23°C (73°F), averaging around 10°C (51°F). The month has lower precipitation levels at 109 mm (4.3 in) over 11 days and a humidity rate of 74%. For more detailed information, check Ibaraki weather in March.
September and April present distinctly different weather patterns. September boasts warmer temperatures with a minimum of 15°C (59°F), averaging around 25°C (78°F), and soaring up to a maximum of 37°C (99°F), making it noticeably hotter than April. In contrast, April experiences cooler temperatures, with a minimum of 3°C (37°F) and an average temperature of 15°C (59°F), peaking at 26°C (79°F).
Precipitation is also more frequent in September, averaging 169 mm (6.7 in) over 15 days compared to April's 135 mm (5.3 in) over just 10 days, resulting in a higher humidity level of 87% in September compared to April’s 76%. For a more detailed look at April weather specifics, visit Ibaraki weather in April.
September weather offers a more extreme temperature range compared to May, with minimums starting at 15°C (59°F) and reaching a sweltering maximum of 37°C (99°F). In contrast, May features cooler temperatures, with a minimum of 8°C (47°F) and a maximum of 31°C (88°F). Both months experience considerable rainfall, but September sees slightly more precipitation at 169 mm (6.7 in) over 15 days, whereas May has 150 mm (5.9 in) over 10 days. Humidity levels are also higher in September, averaging 87% compared to May's 83%. For a closer look at May's climate, you can check out Ibaraki weather in May.
In comparing the weather of September and June, we find that September tends to be hotter, with average temperatures reaching up to 25°C (78°F), while June's average is slightly cooler at 24°C (75°F). September also experiences higher maximum temperatures, soaring to 37°C (99°F) compared to June's peak of 32°C (89°F). Both months are similarly humid, maintaining a consistent humidity level of 87%. However, September sees more rainfall, accumulating 169 mm (6.7 in) over 15 days, whereas June has lower precipitation at 147 mm (5.8 in) over 12 days. For more specific details on the weather, you can visit Ibaraki weather in June.
In comparing September and July weather, September typically experiences slightly lower temperatures, with averages ranging from a minimum of 15°C (59°F) to a maximum of 37°C (99°F), while July maintains warmer nights with a minimum of 20°C (69°F) and an average max temperature of 37°C (99°F). Precipitation is notably higher in July, totaling 282 mm (11.1 in) over 18 days, compared to September’s 169 mm (6.7 in) spread across 15 days. Humidity is also higher in July at 93%, compared to September's 87%, contributing to a more stifling atmosphere during the peak summer month. For more detailed insights, check Ibaraki weather in July.
In September, the weather tends to be slightly cooler than in August, with minimum temperatures dropping to 15°C (59°F) compared to August's 19°C (66°F). The average temperature in September is 25°C (78°F), which is lower than August's average of 29°C (85°F). While both months experience similar maximum temperatures, September's peak is 37°C (99°F) just shy of August's 38°C (101°F). Precipitation levels in September are also quite notable, totaling 169 mm (6.7 in) over 15 days, whereas August sees slightly more rainfall at 183 mm (7.2 in) across 12 days. Humidity remains high in both months, though slightly lower in September at 87% compared to August's 91%. For more details, check Ibaraki weather in August.
In September, the weather tends to be quite warm, with temperatures ranging from a minimum of 15°C (59°F) to a maximum of 37°C (99°F) and an average temperature of 25°C (78°F). This month experiences significant precipitation, totaling 169 mm (6.7 in) across 15 days, alongside high humidity levels at 87%. In contrast, October brings a noticeable drop in temperatures, with minimums of 8°C (46°F), an average of 20°C (67°F), and maximums reaching 33°C (91°F). Although the month sees more precipitation at 230 mm (9.0 in), it occurs over just 12 days, while humidity remains relatively steady at 85%. For more detailed insights, you can check Ibaraki weather in October.
In September, the weather is significantly warmer, with temperatures ranging from a minimum of 15°C (59°F) to a scorching maximum of 37°C (99°F), and an average temperature of 25°C (78°F). This month also sees a high level of humidity at 87% and considerable precipitation totaling 169 mm (6.7 in) over 15 days, making it a rather wet and muggy period.
In contrast, November brings a much cooler atmosphere, with temperatures dropping to a minimum of 2°C (35°F) and an average high of 25°C (78°F), but with the average temperature only reaching 13°C (56°F). The month is drier, with only 44 mm (1.7 in) of precipitation recorded over just 6 days, and humidity slightly lower at 83%. For more detailed insights into November weather, you can visit Ibaraki weather in November.
In September, the weather is typically warm to hot, with temperatures ranging from a minimum of 15°C (59°F) to a maximum of 37°C (99°F), and an average of 25°C (78°F). This month also sees a considerable amount of rainfall, with 169 mm (6.7 in) falling over about 15 days, contributing to a high humidity level of 87%. On the other hand, December brings a stark contrast, characterized by much cooler temperatures that range from a minimum of -1°C (30°F) to a maximum of 22°C (71°F), with an average of 8°C (47°F). The precipitation decreases significantly to 57 mm (2.2 in) over just 6 days, accompanied by a slightly lower humidity of 83%. For more specific details about December weather, you can check out Ibaraki weather in December.
As September arrives in Ibaraki, the weather presents a unique transition from the sweltering heat of summer to the milder embrace of autumn. With temperatures peaking at a scorching 37°C, the month still retains a warm vibrancy, but the average temperature gently drops to a more comfortable 25°C, making it an ideal time for outdoor activities. However, expect the humidity to remain high, contributing to a humid atmosphere, and a notable increase in rainfall with nearly half the days experiencing precipitation. This combination of warmth and moisture sets September apart from its dryer and hotter summer predecessors. For more details on weather patterns, visit Ibaraki Climate.