Last updated: August 21, 2025
September in Matsuyama, Japan, presents a captivating blend of warm temperatures and notable humidity. With a maximum temperature reaching 33°C (91°F) and an average of 24°C (75°F), the days are pleasantly balmy, ideal for exploring the city's rich cultural heritage. However, nighttime cools down to a minimum of 14°C (58°F), offering a refreshing contrast. The month also sees considerable precipitation, with 212 mm (8.4 in) spread over 15 days, contributing to the region's lush landscapes. The high humidity at 85% creates a tropical ambiance, making September a unique time to experience Matsuyama’s vibrant atmosphere amidst occasional rain showers.
In September, Matsuyama, Japan, experiences a delightful transition towards autumn, with temperatures reflecting this seasonal shift. The minimum temperature hovers around a mild 14°C (58°F), while comfortable average highs reach up to 24°C (75°F), making it an ideal time for outdoor exploration. As summer's heat lingers, the maximum temperature can still peak at 33°C (91°F), offering warm days that appeal to sun-seekers. The combination of cooler mornings and pleasant afternoons creates a balanced climate, inviting locals and visitors alike to enjoy the changing scenery and vibrant atmosphere of the city. This month stands out as a perfect blend of late summer warmth and the crispness of emerging autumn, allowing travelers to relish the best of both worlds.
In September, Matsuyama experiences a notable increase in precipitation, with 212 mm (8.4 in) of rain falling over 15 days. This marks a significant shift from the drier summer months; while August recorded 197 mm, September's rains usher in the transition to autumn, where precipitation levels remain elevated as compared to those in earlier months like July and June. The balance of rainy days suggests that showers are more frequent, contributing to a lush landscape that prepares for the seasonal change. As the city heads into October with slightly lower precipitation at 204 mm, the rhythm of rainfall creates a vivid backdrop for Matsuyama’s vibrant fall foliage.
In September, Matsuyama, Japan, experiences a notable drop in humidity, settling at 85% after the peak summer months. This slight decrease offers a welcome respite from the sweltering conditions of July and August, which see humidity soaring to 91% and 88%, respectively. As summer transitions into autumn, the trend indicates a gradual decline in humidity levels, moving from the oppressive heat of mid-summer to more comfortable conditions. This month falls in line with the overall pattern of increasing humidity during the earlier months of the year, peaking in the summer, and then a steady reduction as the year progresses. Thus, September dances delicately between the lingering warmth of summer and the cooling embrace of autumn, making it a cherished time for locals and visitors alike.
As summer fades into September in Matsuyama, Japan, the UV Index remains notably high at 11, categorizing it as extreme and signaling a burn time of just 10 minutes for unprotected skin. This trend reflects a consistent peak in UV intensity throughout the summer months, with UV levels firmly established at 12 in July and August before a slight dip in October. As autumn approaches, awareness of UV exposure becomes essential, especially as the season transitions from the extreme levels seen in late summer to the very high range in October. Residents and visitors alike should be vigilant about sun protection during this time. For more details, visit Matsuyama UV Index.
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As September unfolds in Matsuyama, Japan, residents and visitors can bask in 269 hours of sunshine, marking a vibrant transition from the summer's peak. Following the bright 313 hours of August, this month experiences a slight dip in sunlight, yet still offers ample opportunities to enjoy the lingering warmth. The trend reveals a gradual decline from the height of summer, with months like May and June also boasting impressive daylight hours. As autumn approaches, October's 260 hours will continue this downward trend, but the glow of September serves as a reminder of the sun-soaked days soon to pass, creating a perfect backdrop for strolling through Matsuyama's charming streets and coastal views.
As September rolls into Matsuyama, Japan, the likelihood of sunny weather is moderately promising, with a 30% chance of clear skies. This marks a slight uptick from the summer months, where sun-chasing enthusiasts faced a challenging 24% to 28% chance. While the chance of sun in September remains lower than the spring months, it precedes a notable rebound in October, which boasts a 58% chance of sunshine. This gradual shift indicates a transition from the sultry summer into the more accommodating fall, suggesting that while September may hold some cloudy days, opportunities for delightful sunshine are on the horizon.
As summer transitions into autumn, September in Matsuyama, Japan, experiences a gentle decline in daylight, offering 12 hours of sunshine each day. This marks a shift from the 14 hours enjoyed in the peak of summer, reflecting the natural ebb and flow of the seasons. Following a vibrant June and July, where daylight reaches its zenith, the slightly reduced hours in September signal the onset of fall. The trend continues into October, with daylight tapering to 11 hours, as residents prepare for the cozy embrace of shorter days ahead. This gradual decrease from summer's abundance to autumn's mellow glow creates a beautiful backdrop for the changing foliage and cooler temperatures, inviting both reflection and adventure.
In September, Matsuyama experiences a gentle breeze with an average wind speed of 2.1 m/s (5 mph), marking a slight decline from the warmer summer months. This transition signals the onset of autumn, as winds gradually calm down from the earlier hustle of July and August, which boasted average speeds of 1.9 m/s and 2.3 m/s, respectively. Interestingly, September sets the stage for a gradual uptick in wind speeds as the season progresses, leading into the breezier months of November and December. This seasonal shift not only enhances the beauty of Matsuyama’s landscapes but also invites locals and visitors alike to enjoy the soft caress of the September wind.
Weather in Matsuyama varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Matsuyama, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present stark contrasts in weather conditions. In September, temperatures range from a comfortable 14°C (58°F) at night to a hot 33°C (91°F) during the day, with an average of 24°C (75°F). The month is characterized by high humidity at 85% and significant rainfall, receiving 212 mm (8.4 in) over 15 days. In contrast, January sees much colder temperatures, with a minimum of -4°C (25°F) and a maximum of 15°C (59°F), leading to an average of just 5°C (42°F). Additionally, January is much drier, with only 60 mm (2.4 in) of precipitation over 9 days and lower humidity at 74%. For more information on the January weather, you can visit Matsuyama weather in January.
September and February exhibit strikingly different weather patterns. September boasts warmer temperatures, with an average of 24°C (75°F) and highs reaching up to 33°C (91°F), while February experiences a much cooler climate, averaging just 6°C (43°F) and seeing lows dip to -4°C (24°F). Additionally, September is characterized by significant precipitation, with 212 mm (8.4 in) falling over 15 days, compared to February's milder 90 mm (3.6 in) across 11 days. The humidity also adds to the contrast, sitting at a high 85% in September versus a lower 70% in February. For those interested in more details about February's conditions, refer to Matsuyama weather in February.
September weather is characterized by significantly warmer temperatures, with averages around 24°C (75°F) and highs reaching up to 33°C (91°F), compared to a cooler March where temperatures range from a minimum of 0°C (33°F) to a maximum of 20°C (69°F). Additionally, September experiences higher humidity levels at 85% and more precipitation, with 212 mm (8.4 in) over about 15 days, whereas March has a lower humidity of 70% and 129 mm (5.1 in) of precipitation over 12 days. This makes September feel much more oppressive due to both heat and humidity, while March is cooler and more pleasant, though still subject to some rain. For a detailed look at March weather, you can explore Matsuyama weather in March.
When comparing September and April, it's clear that September is significantly warmer, with average temperatures reaching 24°C (75°F) compared to April's cooler 14°C (57°F). The maximum temperatures in September can soar to 33°C (91°F), while April peaks at a much milder 24°C (75°F). Additionally, September experiences more precipitation with 212 mm (8.4 in) over 15 days, while April sees less rain at 135 mm (5.3 in) across just 10 days. Humidity levels are also higher in September at 85%, compared to April's 76%. For more detailed insights on April weather, visit Matsuyama weather in April.
September and May present contrasting weather patterns, reflecting the transition between summer and autumn. In September, temperatures range from a minimum of 14°C (58°F) to a maximum of 33°C (91°F), with an average of 24°C (75°F), while May experiences cooler temperatures, with a minimum of 7°C (44°F) and a maximum of 28°C (82°F), averaging 18°C (65°F). Additionally, September sees increased precipitation, totaling 212 mm (8.4 in) over 15 days, compared to May's 153 mm (6.0 in) across 11 days. Humidity levels are slightly higher in September at 85%, compared to 82% in May, emphasizing the mugginess that often accompanies the late summer months. For those interested in more details on May weather, the following link provides helpful information: Matsuyama weather in May.
September generally experiences warmer temperatures compared to June, with average highs reaching 33°C (91°F) compared to June's maximum of 30°C (86°F). Both months have similar minimum temperatures, starting around 14°C (57°F to 58°F), and each features substantial precipitation, with September receiving 212 mm (8.4 in) across 15 days and June slightly more at 215 mm (8.5 in) over 14 days. Humidity levels remain high in both months, at 85% in September and 86% in June, indicating a persistently muggy atmosphere. For a more detailed look at June weather specifically, you can refer to Matsuyama weather in June.
In comparing the weather conditions of September and July, a few notable differences emerge. In July, the minimum temperature is slightly higher at 18°C (65°F), while September starts at a cooler minimum of 14°C (58°F). Both months enjoy a maximum temperature of 33°C (91°F), but September averages a more comfortable 24°C (75°F) compared to July's 26°C (79°F). Additionally, July experiences significantly more precipitation, with 374 mm (14.7 in) over 19 days, compared to September's 212 mm (8.4 in) over 15 days. Humidity levels are also higher in July at 91%, versus 85% in September. For more detailed information on July weather, you can check Matsuyama weather in July.
In comparing the weather between August and September, we can see several notable differences. September experiences a lower minimum temperature of 14°C (58°F) compared to August's warmer 20°C (68°F), with an average of 24°C (75°F) in September versus 27°C (81°F) in August. While both months share the same maximum temperature of 33°C (91°F), September sees an increase in precipitation, totaling 212 mm (8.4 in) across 15 days, slightly surpassing August's 197 mm (7.7 in) over the same number of days. Additionally, humidity levels are marginally lower in September at 85%, compared to 88% in August. For a detailed look at the weather specifics for August, you can visit Matsuyama weather in August.
September's weather is characterized by warmer temperatures, with minimums around 14°C (58°F) and maximums reaching 33°C (91°F), making it a hot month overall. In contrast, October sees a noticeable drop in temperature, with lows of 8°C (47°F) and highs of 29°C (84°F), leading to a much cooler average of 19°C (66°F). While both months experience significant rainfall, September has slightly higher precipitation at 212 mm (8.4 in) over 15 days compared to October's 204 mm (8.0 in) spread over 10 days. The humidity levels are also slightly lower in October at 82%, compared to September's humidity of 85%. For more detailed information, you can check Matsuyama weather in October.
September and November present striking contrasts in weather. In September, temperatures are notably warmer, ranging from a minimum of 14°C (58°F) to a maximum of 33°C (91°F), with an average of 24°C (75°F). The month experiences significant rainfall, totaling 212 mm (8.4 in) over 15 days, accompanied by high humidity levels of 85%. In contrast, November sees cooler temperatures, with a minimum of 3°C (37°F) and a maximum of 25°C (77°F), averaging just 13°C (55°F). Precipitation drops significantly to 61 mm (2.4 in) over 8 days, and humidity decreases to 79%. For more details on what to expect, you can visit Matsuyama weather in November.
September weather is generally warm and humid, with temperatures ranging from a minimum of 14°C (58°F) to a maximum of 33°C (91°F) and an average of 24°C (75°F). This month experiences significant rainfall, with a total of 212 mm (8.4 in) over approximately 15 days, contributing to a high humidity level of 85%.
In contrast, December brings a much cooler climate, with temperatures dropping to a minimum of -1°C (31°F) and an average of 8°C (46°F), peaking at a more moderate 22°C (71°F). Precipitation decreases considerably to 69 mm (2.7 in) across about 10 days, and humidity levels are lower at 77%. For more detailed information, check out Matsuyama weather in December.
September in Matsuyama stands out as a transitional month, where the warmth of summer lingers, yet the humidity begins to ease just a touch. With average temperatures around 24°C (75°F), the city enjoys a comfortable climate, contrasting sharply with the sweltering highs often seen in July and August. This month also ushers in a notable increase in precipitation, with rainy days marking its atmosphere, contributing to the lush landscapes that follow. While some may find the 85% humidity still quite palpable, the cooling breezes and vibrant foliage herald the approaching autumn. For more detailed insights into Matsuyama's weather throughout the year, explore Matsuyama Climate.