September Weather in Tochigi, Japan

Last updated: August 21, 2025

September in Tochigi, Japan, brings a dynamic blend of temperatures and weather patterns. With maximum temperatures soaring up to 34°C (93°F) and an average of 22°C (72°F), the days can feel quite warm. However, the nights cool down significantly, dipping to a minimum of 12°C (53°F). This month also witnesses significant rainfall, with total precipitation reaching 225 mm (8.8 in) over 22 days, contributing to a high humidity level of 89%. As the summer transitions into autumn, visitors and residents alike can expect a mix of sunny days and frequent showers, creating a lush and vibrant landscape throughout Tochigi.

September Temperature in Tochigi

In September, Tochigi, Japan, experiences a delightful transition toward autumn, with temperatures reflecting a warm yet comfortable ambiance. The month starts with a minimum of 12°C (53°F) and peaks at a maximum of 34°C (93°F), allowing for plenty of enjoyable outdoor activities. The average temperature settles around 22°C (72°F), offering a pleasant balance that invites both locals and visitors to relish the natural beauty and vibrant scenery. This month signals a gradual shift from the sweltering summer heat of August, where temperatures consistently hovered around 36°C (96°F), to the cooler, crisp days of October. As nature prepares for the transformation of fall, September captures the essence of warmth and comfort, making it an ideal time to explore the picturesque landscapes of Tochigi.

September Weather in Tochigi: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Tochigi, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Tochigi, September typically has an average temperature of {2}°C ({3}°F), with highs reaching up to {4}°C ({5}°F) and lows dropping to around {6}°C ({7}°F).
JanFebMarAprMayJunJulAugSepOctNovDec384047556470778072625241
Data source: Temperature data for Tochigi generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Tochigi

September in Tochigi, Japan, brings a notable increase in precipitation, with 225 mm (8.8 in) of rain accumulated over 22 days, marking a peak as the region transitions into autumn. This month continues the trend established in the summer, characterized by high rainfall that started in July, but it slightly lessens compared to the previous month of August. The consistent number of rainy days highlights the persistent moisture in the air, suggesting an active weather pattern typical for this time of year. As autumn approaches, the gradual shift in precipitation sets the stage for a beautiful seasonal change, inviting the vibrant colors of fall while maintaining a rich atmospheric presence.

September Precipitation Trends in Tochigi

The chart displays monthly precipitation patterns in Tochigi, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Tochigi, September typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec38431411441601942962182252676754
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Tochigi

In Tochigi, Japan, September marks a transition in humidity, with levels at 89%, which reflects a slight decrease from the sweltering peak of 92% experienced in the prior two months. This dip signifies the onset of autumn, where the lingering warmth of summer begins to wane, yet the air remains notably moist. Throughout the year, humidity in Tochigi displays a fascinating pattern: it peaks during the summer months of July and August, then begins a gradual decline into the cooler months. As September ushers in a shift toward crispness, it offers a comfortable balance between lingering warmth and refreshing breezes, setting the stage for the refreshing months ahead.

September Average Humidity in Tochigi

This chart illustrates the average monthly humidity levels in Tochigi, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Tochigi is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%81%79%81%88%92%92%89%87%85%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Tochigi

September in Tochigi, Japan, marks a transition as summer wanes, yet the UV Index remains notably high at 9, categorizing exposure as very high. With a burn time of just 15 minutes, it's essential to stay vigilant under the sun. This month follows a summer of extreme UV levels, peaking at 11 in both June and July, before slightly easing in August. The gradual decline in UV intensity hints at the approach of autumn, but the need for sun protection persists. For outdoor enthusiasts, awareness of the UV Index is crucial; check the details here: Tochigi UV Index for safe sun exposure practices as the season changes.

Maximum UV Index Levels in Tochigi for September

The chart shows the monthly maximum UV Index (UVI) for Tochigi in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Tochigi typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579101111109653
Data source: Tochigi September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

September Sunshine in Tochigi

September in Tochigi, Japan, brings a gentle transition into autumn, with 224 hours of sunshine that reflects a subtle decline from the summer highs. This month, while slightly less sunny than its predecessor August, which boasted 269 hours, still holds onto fairly bright days reminiscent of the spring months, such as May with 278 hours. The trend showcases a gradual decrease in sunlight from the peak summer months, signaling the approach of cooler weather and shorter days. This progression, however, is balanced by the lingering warmth of late summer, making September a wonderful time to enjoy the vibrant landscapes of Tochigi before the chill of October sets in, which sees a further dip to 207 hours of sunshine.

Monthly Sunshine Duration in Tochigi: September Highlighted

The September sunshine duration represents the total number of hours Tochigi experiences direct sunlight during the month of September, excluding cloudy or obstructed periods. This chart compares the sunshine duration of September with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec190h238h264h277h278h262h227h269h224h207h232h231h
Data source: Tochigi September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Tochigi During September

When it comes to the likelihood of sunny weather in September in Tochigi, Japan, the chances sit at a modest 23%. This reflects a continuation of the trend seen through the summer months, where July and August also hover around the same percentage, indicating a notably cloudy season. Following this stretch of overcast days, September’s sun probability is lower compared to other months like January (53%) and November (62%), which suggests that while there are glimpses of sunshine, this period tends to favor cloud cover. As autumn approaches, the sunny days become more sporadic, making it essential for visitors to plan their outdoor activities accordingly.

Percentage of Sunny Days in September in Tochigi

The chart illustrates the percentage of sunny days in Tochigi throughout the year, with September highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Tochigi experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec53%70%41%48%24%19%24%24%23%45%62%67%
Data source: Tochigi September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Tochigi in September

As September arrives in Tochigi, Japan, daylight begins to gently wane, providing approximately 12 hours of sunshine—a subtle decline after the vibrant summer months. Following the peak of 14 hours during June and July, the transition into autumn is marked by a gradual reduction in daylight. This pattern continues as October approaches, where the daylight dips further to 11 hours. Throughout the year, Tochigi experiences a natural rhythm: the shorter days of winter contrast with the long, bright days of summer, creating a dynamic seasonal experience that encourages residents and visitors alike to savor the changing beauty of nature.

Average Daylight Hours in Tochigi for September

The chart illustrates the variation in daylight duration in Tochigi throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 58m10h 50m11h 57m13h 7m14h 5m14h 35m14h 20m13h 29m12h 23m11h 14m10h 13m9h 42m
Data source: Tochigi daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Tochigi

As September unfolds in Tochigi, Japan, the gentle breeze becomes a hallmark of the season, with an average wind speed of 1.7 m/s (4 mph). This subtle decrease from the summer's 1.9 m/s (4 mph) reflects a gradual shift towards the tranquil embrace of autumn. Throughout the year, Tochigi experiences a nuanced dance of winds, peaking in the early months with January's crisp 2.0 m/s (4 mph) and gradually tapering off during the summer, reaching its calmest in July at 1.4 m/s (3 mph). However, as the leaves begin to shift colors, a slight uptick in October to 1.8 m/s (4 mph) suggests that autumn breezes are on the horizon, promising a refreshing reprieve from the summer's stillness. This rhythm of wind captures the essence of Tochigi’s seasonal transitions, inviting all to revel in the serene beauty of nature's cycles.

Average September Wind Speed in Tochigi

The chart displays monthly wind speed patterns in Tochigi, with values for each month shown alongside September's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how September's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec2.02.62.32.22.01.81.41.91.7 m/s1.81.72.2
Data source: Tochigi September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Tochigi Compares to Other Months

Weather in Tochigi varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Tochigi, focusing on differences in temperature, rainfall, humidity, and UV levels.

In September, temperatures are significantly warmer, with a minimum of 12°C (53°F) and an average of 22°C (72°F), reaching as high as 34°C (93°F). However, this month also sees considerable precipitation, averaging 225 mm (8.8 in) over 22 days and high humidity at 89%. In stark contrast, January brings much colder weather, with temperatures dipping to a minimum of -12°C (11°F) and an average of just 3°C (38°F), peaking at 16°C (60°F). Precipitation is notably lower at 38 mm (1.5 in), occurring on only 5 days, while humidity remains relatively steady at 88%. For more detailed insights, you can visit Tochigi weather in January.

September and February present striking contrasts in weather. September enjoys a warm climate, with average temperatures around 22°C (72°F) and maximums reaching up to 34°C (93°F), while the month experiences significant rainfall, totaling 225 mm (8.8 in) over 22 rainy days and high humidity at 89%. In contrast, February brings much cooler conditions, featuring minimum temperatures plunging to -6°C (22°F) and an average of only 4°C (40°F). Precipitation is considerably lower in February, with only 43 mm (1.7 in) over 6 days and humidity slightly lower at 86%. For more detailed information, visit Tochigi weather in February.

In September, the weather is significantly warmer and more humid, with temperatures ranging from a chilly 12°C (53°F) at night to a scorching 34°C (93°F) during the day, averaging around 22°C (72°F). The month also sees considerable rainfall, accumulating to 225 mm (8.8 in) over 22 days, resulting in a high humidity level of 89%. In contrast, March offers a much cooler climate, with a minimum temperature of -5°C (24°F) and a maximum of 23°C (74°F), averaging 8°C (47°F). With only 141 mm (5.5 in) of precipitation spread across 11 days and a slightly lower humidity of 81%, March provides a stark change in weather, moving from the heat and humidity of late summer to the crispness of early spring. For a more detailed look at the weather in Tochigi during March, Tochigi weather in March.

September and April exhibit contrasting weather patterns, highlighting the transition from summer to autumn and winter to spring, respectively. In September, temperatures range from a mild 12°C (53°F) to a scorching 34°C (93°F), with an average of 22°C (72°F). The month is characterized by high humidity at 89% and considerable rainfall, totaling 225 mm (8.8 in) over 22 days, making it one of the wetter months. In contrast, April experiences much cooler conditions, with temperatures varying from a chilly -1°C (31°F) to a comfortable 28°C (83°F) and an average of just 13°C (55°F). The precipitation is lower at 144 mm (5.7 in) and occurs over 13 days, alongside comparatively lower humidity at 78%. These differences make September feel more sultry and rainy, while April feels brisk and refreshing. For more details on April's weather, you can visit Tochigi weather in April.

In comparing the weather between September and May, September tends to be warmer, with average temperatures ranging from a minimum of 12°C (53°F) to a maximum of 34°C (93°F), while May sees a cooler range, with minimums of 4°C (40°F) and maximums of 32°C (91°F). Additionally, September experiences significantly higher precipitation, totaling 225 mm (8.8 in) over 22 days, compared to May’s 160 mm (6.3 in) across 15 days. The humidity is also notably higher in September at 89%, compared to May's 81%, creating a more humid and potentially uncomfortable climate later in the year. For more detailed information, you can check out Tochigi weather in May.

September and June present similar temperature profiles, with average highs only slightly varying—September reaching a maximum of 34°C (93°F) compared to June’s 33°C (92°F). Both months experience a comfortable range of minimum temperatures, with September at 12°C (53°F) and June slightly cooler at 11°C (52°F). However, September is notably wetter, receiving 225 mm (8.8 in) of precipitation over 22 days, while June sees less rain at 194 mm (7.6 in) over 19 days. Humidity levels remain fairly consistent in both months, hovering around 88-89%. For more details on weather patterns in June, visit Tochigi weather in June.

In September, temperatures tend to be slightly cooler compared to July, with average lows of 12°C (53°F) and highs reaching up to 34°C (93°F). While both months experience high humidity, September's average humidity sits at 89%, just slightly lower than July's 92%. Moreover, September sees less rainfall total, accumulating around 225 mm (8.8 in) over 22 days, compared to July's higher precipitation of 296 mm (11.6 in) over 25 days. For a more detailed look at July's weather patterns, you can visit Tochigi weather in July.

In comparing the weather of September and August, September experiences slightly cooler temperatures with a minimum of 12°C (53°F) and an average of 22°C (72°F), compared to August's minimum of 15°C (59°F) and an average of 26°C (80°F). Maximum temperatures also decrease, with September peaking at 34°C (93°F), whereas August reaches up to 36°C (96°F). Precipitation levels are quite similar, with September receiving 225 mm (8.8 in) and August slightly less at 218 mm (8.6 in), both spread over 22 rainy days. Humidity remains high in both months, with September at 89% and August at 92%. For more detailed insights about August weather, visit Tochigi weather in August.

September typically experiences warmer temperatures, with a minimum of 12°C (53°F) and an average high of 34°C (93°F), while October sees a notable drop in temperatures, with a minimum of 4°C (39°F) and an average of 17°C (63°F). In terms of precipitation, October receives slightly more rainfall at 267 mm (10.5 in) over 17 days compared to September's 225 mm (8.8 in) over 22 days. Humidity levels are relatively similar, remaining high at 89% in September and slightly lower at 87% in October. For more detailed insights on October's weather in Tochigi, you can refer to Tochigi weather in October.

September weather is characterized by much warmer temperatures, with minimums around 12°C (53°F) and maximums reaching up to 34°C (93°F), while November brings a noticeable drop, with lows plummeting to -3°C (28°F) and highs peaking at 23°C (73°F). In addition to cooler temperatures, November experiences significantly less precipitation, totaling only 67 mm (2.6 in) over approximately 8 days, compared to September's 225 mm (8.8 in) over 22 days. Humidity remains relatively high in both months, but September edge out slightly at 89%, while November sees values around 85%. For more specific details about November weather, you can visit Tochigi weather in November.

September and December showcase stark contrasts in weather. In September, temperatures range from a minimum of 12°C (53°F) to a maximum of 34°C (93°F), with an average of 22°C (72°F), making it a warm and humid month with 225 mm (8.8 in) of precipitation over 22 days and a humidity level of 89%. In contrast, December experiences a significant drop in temperatures, with a minimum of -3°C (26°F), an average of 5°C (42°F), and a maximum of 18°C (65°F). Additionally, December is much drier, receiving only 54 mm (2.1 in) of precipitation over 6 days and maintaining a lower humidity level of 86%. For more details on the December weather, check Tochigi weather in December.

Compare Tochigi's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Tochigi

As summer gradually fades in Tochigi, September ushers in a unique blend of warm days and cooler nights, marked by a notable average temperature of 22°C. While the maximum heat can soar to 34°C, the evenings offer a refreshing break with lows around 12°C. This month is also characterized by increased rainfall, with precipitation occurring on nearly three-quarters of the days, resulting in a humid atmosphere that averages 89%. Unlike the dry heat of the preceding summer months, September's weather presents a more dynamic and moist climate, setting the stage for the vibrant autumn colors that follow. For more insights on the seasonal patterns, visit our detailed Tochigi Climate page.