Last updated: August 21, 2025
In September, Numazu, Japan, showcases a warm climate characterized by an average temperature of 24°C (75°F), with highs reaching up to 30°C (85°F) and lows dipping to around 17°C (63°F). This month sees significant precipitation, totaling 242 mm (9.5 in), spread over approximately 17 days, contributing to a heightened humidity level of 86%. Visitors can expect a mix of warm, humid days along with occasional rain, making it a vibrant yet challenging time to explore the scenic beauty of this coastal city.
September in Numazu, Japan, marks a delightful transition towards autumn, with temperatures typically ranging from a minimum of 17°C (63°F) to a maximum of 30°C (85°F). This month features an average temperature of 24°C (75°F), reflecting a warm yet comfortable climate that invites outdoor exploration. As summer's heat gradually subsides, September showcases a perfect blend of warmth during the day while cooler evenings hint at the approaching fall. Visitors will appreciate the pleasant weather, making it an ideal time for enjoying Numazu's stunning landscapes and vibrant local culture. Overall, September serves as a gentle reminder of nature's cyclical embrace, merging the remnants of summer with the whispers of autumn.
In September, Numazu experiences a notable shift in its precipitation pattern, receiving 242 mm (9.5 in) of rain over 17 days. This month consistently follows the peak of the rainy season in July, which sees the highest rainfall of the year at 437 mm (17.2 in). The trend reflects a gradual decrease from the summer deluge, yet it remains significant, marking September as one of the wetter months. The rainfall not only sustains the lush landscapes typical of the region but also sets the stage for the wetter October, which averages 296 mm (11.6 in). As the rainy days continue, this month serves as a transitional period, balancing the remnants of summer's heat against the incoming autumn chill.
In September, Numazu, Japan experiences a notable humidity level of 86%, which marks a slight decline from the peak summer months of July and August, when humidity soared to 93% and 90%, respectively. This trend illustrates a gradual transition from the sweltering summer, characterized by high moisture levels, towards the more temperate autumn. The overall pattern reveals that as the year progresses, humidity levels fluctuate, peaking during the height of summer and descending through early fall, ultimately stabilizing in the fall months of October and November, which hover around the low 80s. This rhythm of rising and falling humidity creates a distinct seasonal climate, deeply influencing the atmosphere and natural beauty of Numazu throughout the year.
September in Numazu, Japan, sees a UV Index of 10, marking a return to very high exposure levels after the extreme peaks of summer. With a burn time of just 15 minutes, it’s essential to stay vigilant when enjoying outdoor activities. This month’s UV Index reflects a slight decline from the summer months, yet still demands proper sun protection to prevent skin damage. The trend shows a gradual reduction in UV intensity as fall approaches, with October bringing a lower index of 7, which transitions into the cooler months. For comprehensive insights on UV levels throughout the year, visit Numazu UV Index.
UV Risk Categories
September in Numazu, Japan, offers a delightful blend of warmth and sunshine, boasting 236 hours of sunlight. This month marks a slight decline from the sun-kissed heights of August, which saw an impressive 285 hours. However, September shines brighter than the earlier summer months, such as July and June, where sunlight peaked at 229 and 253 hours respectively. The steady progression from the cold of January, starting at just 189 hours, to the balmy, sun-rich days of late summer and early fall highlights a captivating seasonal trend. As fall approaches, the gentle transition brings a comforting balance of warm days and cool evenings, making September a particularly enjoyable time to bask in the sun’s golden rays.
In September, the likelihood of enjoying sunny weather in Numazu, Japan, stands at 33%, which is slightly lower than the summer months of July and August. This drop aligns with the transition from summer to autumn, where the chance of sunshine begins to decrease. Interestingly, while September may not boast the sunniest skies, it is a modest improvement compared to the rainy season of June and July, when the chances of a sunny day plummet to 24% and 31%, respectively. As autumn sets in, the likelihood of clear skies gradually picks up again in October, reaching 47%, making September a herald of change in the weather patterns.
In Numazu, Japan, the progression of daylight duration throughout the year reveals a captivating rhythm of change. As summer fades into autumn, September ushers in a gentle decline in daylight, with 12 hours illuminating the days. This marks a subtle transition from the peak summer months of June and July, where daylight lingers at an impressive 14 hours. Following the vibrant spring—boasting 13 hours in April and 14 hours in May—September showcases a harmonious blend of brightness and the impending coziness of fall. As the days continue to shrink towards the 11 hours seen in October, the gradual retreat of daylight invites reflection and preparation for the cozy months ahead. The evolving daylight not only sets the backdrop for seasonal activities but also underscores the beauty of nature's cycles in this picturesque locale.
In September, Numazu experiences a gentle shift in wind patterns, with an average wind speed of 3.2 m/s (7 mph). This mirrors the lighter breezes of August, suggesting a transitional phase as summer yields to the cooler embrace of autumn. Interestingly, the lowest wind speeds are noted during the peak summer months of June and July, where the breezes barely stir at 2.2 m/s (5 mph) and 2.4 m/s (5 mph), respectively. As the year approaches its end, a slight uptick is observed, with speeds reaching 4.0 m/s (9 mph) in December, hinting at the invigorating winds of winter. Overall, September’s winds provide a consistent and refreshing backdrop, conducive to enjoying the last warm days before the cooler months set in.
Weather in Numazu varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Numazu, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present a stark contrast in weather conditions. In September, temperatures range from a minimum of 17°C (63°F) to a maximum of 30°C (85°F), with an average of 24°C (75°F) and high humidity at 86%. This month is also quite wet, receiving 242 mm (9.5 in) of precipitation over 17 days. In contrast, January experiences much cooler temperatures, with a minimum of 0°C (32°F), an average of 8°C (46°F), and a maximum of 17°C (62°F). Precipitation drops significantly to 71 mm (2.8 in) over just 6 days, accompanied by a lower humidity of 76%. For more details about January weather, visit Numazu weather in January.
September and February exhibit stark contrasts in weather conditions. September typically boasts warmer temperatures, with a minimum of 17°C (63°F), averaging around 24°C (75°F), and peaking at 30°C (85°F). However, it also experiences considerable rainfall, totaling 242 mm (9.5 in) over 17 days, paired with high humidity levels at 86%. In contrast, February is much cooler, with temperatures ranging from a minimum of 1°C (33°F) to a maximum of 17°C (63°F), averaging only 8°C (46°F). Precipitation is significantly lower in February, at 99 mm (3.9 in) over just 8 days, and humidity sits at a more moderate 74%. For more detailed information on February weather, you can visit Numazu weather in February.
September and March present quite distinct weather patterns. In September, temperatures range from a minimum of 17°C (63°F) to a maximum of 30°C (85°F), offering an average of 24°C (75°F). This month is marked by high humidity at 86% and significant rainfall, with 242 mm (9.5 in) spread over 17 days. In contrast, March sees much cooler temperatures, with a minimum of 3°C (38°F) and a maximum of 19°C (67°F), averaging around 11°C (52°F). The precipitation is slightly lower at 219 mm (8.6 in) over 13 days, and the humidity is more moderate at 70%. For a more detailed look at the March weather, you can check Numazu weather in March.
September and April showcase contrasting weather patterns. In September, temperatures range from a minimum of 17°C (63°F) to a maximum of 30°C (85°F), with an average of 24°C (75°F). The month is characterized by high humidity at 86% and significant rainfall, totaling 242 mm (9.5 in) over 17 days. In stark contrast, April experiences cooler temperatures, with a range from 5°C (42°F) to 22°C (72°F) and an average of 14°C (57°F). It also sees less precipitation at 226 mm (8.9 in), spread over just 11 days, and a lower humidity level of 74%. For more insights on April weather in the region, check Numazu weather in April.
In comparing the weather of September and May, September tends to be warmer, with average temperatures ranging from a minimum of 17°C (63°F) to a maximum of 30°C (85°F), while May has milder temperatures, with a minimum of 12°C (53°F) and a maximum of 24°C (76°F). Additionally, September experiences higher humidity at 86%, compared to May's 81%. Both months see a similar amount of precipitation, with September recording 242 mm (9.5 in) over 17 days and May slightly less at 236 mm (9.3 in) over 12 days. For more detailed information, you can refer to Numazu weather in May.
In comparing the weather patterns of September and June, we find that September tends to be warmer with average temperatures reaching 24°C (75°F) compared to June's average of 21°C (70°F). Both months experience significant rainfall, but September has slightly less precipitation at 242 mm (9.5 in) over 17 days, while June sees 286 mm (11.3 in) across 16 days. Humidity levels are also similar, with September at 86% and June slightly higher at 88%. For more detailed information about June weather in Numazu, you can visit Numazu weather in June.
In comparing the weather of September and July, it is clear that both months experience warm temperatures, but there are some notable differences. September has a slightly lower minimum temperature of 17°C (63°F) compared to July’s 19°C (67°F), although the average temperatures for both months are quite similar, hovering around 24°C (75°F). July is characterized by a higher maximum temperature of 31°C (87°F), versus September's peak of 30°C (85°F). Precipitation is notably higher in July, with 437 mm (17.2 in) falling over 21 days, compared to September’s 242 mm (9.5 in) over 17 days. Additionally, humidity levels are greater in July at 93%, while September sees a humidity level of 86%. For more details on July weather specifics, you can check Numazu weather in July.
In September, the weather shifts slightly as the temperatures cool down, with a minimum of 17°C (63°F) and an average of 24°C (75°F), compared to August's warmer minimum of 21°C (70°F) and average of 26°C (80°F). While both months see significant rainfall, September has a total precipitation of 242 mm (9.5 in) over 17 days, which is slightly higher than August’s 223 mm (8.8 in) over 16 days. Humidity remains high in both months, with September at 86% and August slightly higher at 90%. For more detailed information about August weather in Numazu, you can check out Numazu weather in August.
In September, the weather features warmer temperatures, with minimums averaging 17°C (63°F) and maximums reaching up to 30°C (85°F). The month experiences significant rainfall, totaling 242 mm (9.5 in) over 17 days, contributing to a high humidity level of 86%. In contrast, October brings cooler conditions, with minimum temperatures dropping to 13°C (55°F) and maximums peaking at 27°C (81°F). Rainfall increases slightly to 296 mm (11.6 in) over 16 days, while humidity decreases to 83%. For more details on October conditions, check out Numazu weather in October.
In September, the weather is warm and humid, with temperatures ranging from a minimum of 17°C (63°F) to a maximum of 30°C (85°F), coupled with an average of 24°C (75°F). The month experiences significant precipitation, with about 242 mm (9.5 in) falling over 17 days, and humidity levels reaching 86%. In contrast, November brings a noticeable change, as temperatures drop to a minimum of 6°C (43°F) and an average of 15°C (59°F), peaking at 22°C (71°F). Rainfall is reduced to 102 mm (4.0 in) over just 10 days, and humidity decreases slightly to 80%. For more detailed information about November weather, you can visit Numazu weather in November.
September and December present stark contrasts in weather conditions. In September, temperatures range from a mild 17°C (63°F) at night to a warm 30°C (85°F) during the day, accompanied by high humidity levels of 86% and significant rainfall totaling 242 mm (9.5 in) over 17 days. In contrast, December sees much cooler temperatures, with a minimum of 1°C (35°F) and a maximum of 19°C (67°F), alongside a drop in precipitation to 84 mm (3.3 in) spread over just 8 days. The humidity also decreases to 78%, making December feel considerably drier than the humid September. For more detailed insights, you can check Numazu weather in December.
As summer transitions into autumn, September in Numazu brings a shift in weather patterns that sets it apart from the warmer months. With average temperatures dipping to a comfortable 24°C, the days can still feel warm, yet the humidity remains high at 86%, intensifying the tropical feel of this coastal city. The month is also marked by significant rainfall, with nearly half of September experiencing precipitation, contributing to a total of 242 mm. This notable increase in rain not only refreshes the surroundings but also signals the onset of the wet season. In contrast to the more stable weather of July and August, September's blend of warm days, high humidity, and frequent showers creates a unique atmosphere that is perfect for enjoying the lush landscapes of Numazu. For a deeper dive into seasonal weather patterns, check out Numazu Climate.