Last updated: August 21, 2025
In September, Narita, Japan experiences a dynamic climate characterized by temperatures ranging from a warm maximum of 35°C (94°F) to a cooler minimum of 14°C (58°F), with an average temperature settling around 24°C (75°F). This month is also marked by significant precipitation, totaling 186 mm (7.3 in) over 17 days, contributing to a rather humid atmosphere with humidity levels hovering at approximately 83%. Visitors can expect a mix of warm days interspersed with rainy spells, making this a time of lush greenery and vibrant landscapes in the region.
In September, Narita, Japan, experiences a delightful transition into early autumn, with temperatures showcasing a comfortable range. The month starts with a minimum of 14°C (58°F), providing a mild backdrop for outdoor activities, and reaches an inviting average of 24°C (75°F). With maximum temperatures peaking at a warm 35°C (94°F), the lingering warmth of summer is still felt, making it one of the last chances to enjoy sunny days before cooler weather sets in. As the month progresses, a noticeable drop in temperature hints at the upcoming autumn chill, marking a smooth shift from the scorching heat of July and August to the more temperate climate of October. Overall, September in Narita encapsulates a perfect blend of warmth and comfort, ideal for exploration and relaxation.
In Narita, Japan, September marks the onset of a particularly wet phase in the year, with an average precipitation of 186 mm (7.3 in) over approximately 17 days of rain. This substantial rainfall is part of a broader trend observed from June through early fall, characterized by significantly increased precipitation levels, peaking in July with 223 mm. Following the lush summer months, September maintains a high volume of rainfall, though it's slightly less than October's impressive 254 mm. As the seasons transition, the combination of increased rainfall and persistent wet days in September not only refreshes the surrounding landscape but also sets the stage for the robust precipitation typical of the autumn months.
In September, Narita experiences a notable shift in humidity levels, with an average of 83%, reflecting the lingering warmth of summer as it transitions into autumn. This month sees a slight decrease from the peak of 94% in July and 87% in August, yet remains comfortably high compared to the earlier months of the year, such as 68% in March and 70% in January. The gradual increase from 81% in May to 88% in June suggests the onset of the rainy season, peaking in July before the humidity begins to moderately decline. As October approaches, humidity levels continue to drop, marking the start of a more refreshing climate that is characteristic of Narita's autumn, showcasing a beautiful balance between warmth and comfort in late summer.
As September rolls into Narita, Japan, the UV Index registers a notable 9, placing it in the very high exposure category. This signals a slight dip from the intense conditions experienced in the preceding summer months, where the UV Index peaked at 11, classifying it as extreme with a rapid burn time of just 10 minutes. Now, residents and visitors can expect a more manageable burn time of 15 minutes as the weather begins its gradual shift toward autumn. Nonetheless, vigilance is still key, as the UV Index remains high enough to warrant protection during outdoor activities. For continuous updates on UV levels and safety, check out Narita UV Index.
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As summer gracefully transitions into autumn, September in Narita, Japan, boasts an impressive 245 hours of sunshine. This month sees a subtle decline from the peak of 302 hours in August, yet it remains a vibrant time to enjoy the outdoors. The sunshine hours showcase a distinct upward trend through spring, peaking in a radiant summer before slightly dipping into fall. With September's forecast, residents and visitors alike can relish in the warm glow of late-season sun, perfectly positioned between the lush exuberance of summer and the crisp charm of autumn. This delightful blend of weather invites exploration and outdoor activities, allowing everyone to soak up the last rays before the days grow shorter.
In Narita, Japan, the likelihood of sunny weather in September is relatively low, with only a 27% chance of sunshine. This trend marks a noticeable dip compared to the summer months, where July and August offer slightly higher probabilities of clear skies at 34% and 37%, respectively. As the seasons transition into autumn, the sun becomes increasingly elusive, though the chance of sunny days begins to recover in October, climbing back to 47%. Overall, September serves as a bridge between the sunnier summer and the more promising fall months, making it a time when potential rain may be on the horizon.
As autumn approaches, September in Narita, Japan, experiences a noticeable shift in daylight duration, with 12 hours of sunlight illuminating the day. This marks a gentle decline from the summer months, where the days were vibrant and extended at 14 hours in July and June. Following this peak, August saw a slight decrease to 13 hours, indicating the gradual transition toward shorter days. The trend reveals a rhythmic ebb and flow of daylight throughout the year, with March hinting at the forthcoming spring's lengthening days at 11 hours, and October signaling a further decline to 11 hours as winter approaches. The interplay of light and dark in Narita encapsulates the beauty of changing seasons.
As September unfolds in Narita, Japan, the average wind speed hovers around 3.3 m/s (7 mph), marking a gentle shift in the breeze as summer transitions to autumn. This slight decrease from the summer months, where wind speeds peaked at 4.0 m/s (9 mph) in May, suggests a calming effect in the atmosphere. Interestingly, the month serves as a bridge, showing a small dip compared to August but remaining slightly elevated compared to the quieter months of winter, such as December and January, where speeds drop to 3.2 m/s (7 mph) or lower. With its mild winds, September in Narita creates a soothing backdrop for the vibrant fall foliage that begins to grace the landscape, capturing the delicate balance between the lingering warmth of summer and the crispness of the upcoming season.
Weather in Narita varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Narita, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather is significantly warmer and more humid, with temperatures ranging from a minimum of 14°C (58°F) to a scorching maximum of 35°C (94°F) and an average temperature of 24°C (75°F). This month also sees considerable rainfall, with a total of 186 mm (7.3 in) over about 17 days, making it one of the wetter months of the year with humidity levels at 83%.
In contrast, January experiences much cooler temperatures, with a minimum of -6°C (21°F) and a maximum of 17°C (64°F), averaging just 5°C (42°F). The precipitation drops significantly to 52 mm (2.1 in) over just 6 days, and the humidity falls to 70%, resulting in a drier and crisper winter atmosphere. For more details on January weather, you can check Narita weather in January.
September weather is characterized by warm temperatures, ranging from a minimum of 14°C (58°F) to a maximum of 35°C (94°F), with an average of 24°C (75°F). The month experiences significant rainfall, totaling 186 mm (7.3 in) over 17 days and a high humidity level of 83%. In contrast, February offers a much cooler climate, with temperatures dipping to a minimum of -3°C (28°F) and peaking at 20°C (68°F), averaging only 6°C (44°F). Precipitation is also less frequent in February, with only 46 mm (1.8 in) of rainfall over 8 days and a lower humidity of 69%. For more detailed insights on February weather, visit Narita weather in February.
September and March exhibit significantly different weather patterns. In September, temperatures range from a minimum of 14°C (58°F) to an average of 24°C (75°F) and can peak at 35°C (94°F), accompanied by high humidity at 83%. The month also sees considerable rainfall, with 186 mm (7.3 in) of precipitation over 17 days. In contrast, March experiences much cooler temperatures, with a minimum of -1°C (31°F) and an average of 10°C (51°F), peaking at 23°C (74°F). Precipitation is lower in March, totaling 136 mm (5.4 in) over 13 days and with a humidity level of 68%. For more details on March weather, you can visit Narita weather in March.
When comparing the weather in September and April, notable differences in temperature and precipitation stand out. September tends to be much warmer, with average temperatures reaching 24°C (75°F) and highs soaring up to 35°C (94°F), while April has a cooler average of 14°C (58°F) and maximum temperatures of 27°C (81°F). Additionally, September experiences significantly more rainfall, with 186 mm (7.3 in) over 17 days compared to April's 116 mm (4.6 in) over just 11 days. Furthermore, humidity levels are higher in September at 83%, compared to 73% in April. For a detailed look at April's weather specifics, you can check the link: Narita weather in April.
In September, temperatures range from a minimum of 14°C (58°F) to a sweltering maximum of 35°C (94°F), resulting in an average temperature of 24°C (75°F). The month is characterized by significant rainfall, with 186 mm (7.3 in) spread over 17 days, contributing to a high humidity level of 83%. In contrast, May presents much milder weather, with temperatures starting from a minimum of 8°C (47°F) and reaching a maximum of 32°C (90°F), leading to an average of 19°C (67°F). Although May also experiences precipitation, it totals 128 mm (5.0 in) over fewer days, only 12, with slightly lower humidity at 81%. You can explore more details about May weather at Narita weather in May.
In comparing the weather between September and June, we find that September tends to be slightly warmer, with average temperatures reaching 24°C (75°F) compared to June's 22°C (72°F). September also experiences more variability in temperature, with maximums hitting 35°C (94°F) compared to June's 33°C (91°F). However, September brings more precipitation, with an average of 186 mm (7.3 in) spread over 17 days, while June sees less rain with 161 mm (6.3 in) over just 13 days. Additionally, humidity is higher in June at 88%, while September averages 83%. For more details, check out Narita weather in June.
In comparing the weather between September and July, September tends to be slightly cooler, with minimum temperatures averaging 14°C (58°F) compared to July's 18°C (65°F). While the average temperature in September reaches 24°C (75°F), July is warmer at 26°C (79°F), peaking at a maximum of 36°C (98°F) in July versus 35°C (94°F) in September. Precipitation levels are also notable; September receives 186 mm (7.3 in) of rain over 17 days, while July has a slightly higher precipitation of 223 mm (8.8 in) across the same number of days. Humidity levels in July are higher at 94%, compared to 83% in September. For more detailed information on July weather specifically, visit Narita weather in July.
In August, temperatures are generally warmer, with a minimum of 18°C (64°F), an average of 28°C (82°F), and a maximum reaching 36°C (97°F). The month is characterized by higher humidity levels at 87% and less precipitation, totaling 102 mm (4.0 in) over 14 days. In contrast, September sees a drop in average temperature to 24°C (75°F) and a minimum of 14°C (58°F), while the maximum remains similarly warm at 35°C (94°F). However, rainfall increases significantly to 186 mm (7.3 in) over 17 days, and humidity remains high at 83%. For more insights on weather specifics during August, you can visit Narita weather in August.
In September, the weather is typically warmer, with temperatures ranging from a minimum of 14°C (58°F) to a maximum of 35°C (94°F) and an average of 24°C (75°F). The month experiences considerable rainfall, totaling 186 mm (7.3 in) over 17 days, and humidity levels are high at 83%. In contrast, October sees cooler temperatures, with a minimum of 9°C (48°F), an average of 19°C (66°F), and a maximum of 31°C (88°F). Although it is cooler, October is wetter, with precipitation reaching 254 mm (10.0 in) over 14 days, and humidity decreases slightly to 78%. For more details on October weather, you can check Narita weather in October.
September and November present a striking contrast in weather conditions. In September, temperatures range from a minimum of 14°C (58°F) to a maximum of 35°C (94°F), with an average of 24°C (75°F), making it a warm month. However, it is also characterized by high humidity at 83% and significant rainfall, with 186 mm (7.3 in) of precipitation over 17 days. In contrast, November sees much cooler temperatures, with a minimum of 3°C (37°F), an average of 14°C (57°F), and a maximum of 23°C (75°F). The month is drier, with only 101 mm (4.0 in) of rainfall over 10 days and lower humidity at 74%. For more detailed information on the weather in November, you can check Narita weather in November.
September and December present strikingly contrasting weather conditions. In September, temperatures range from a mild 14°C (58°F) at night to a scorching high of 35°C (94°F) during the day, with an average of 24°C (75°F). This month also experiences significant rainfall, totaling 186 mm (7.3 in) over about 17 days, combined with high humidity at 83%. In contrast, December brings much cooler temperatures, where nighttime lows can drop to -3°C (27°F) and daytime highs reach a maximum of 21°C (71°F), averaging just 8°C (46°F). Precipitation is far lighter, with 71 mm (2.8 in) falling over only 8 days and a lower humidity level of 72%. For more insights on the weather specifics, you can visit Narita weather in December.
As September unfolds in Narita, the weather showcases a unique blend of transition, marking a departure from the summer heat. With maximum temperatures peaking at a sweltering 35°C and a more comfortable average of 24°C, the month embraces a gradual cooling trend. However, the lingering humidity at 83% adds a subtropical touch, making the air feel heavier. Rainfall is also prevalent, with 186 mm captured over 17 days, offering much-needed relief from the residual summer warmth while ensuring the lush landscapes remain vibrant. For an in-depth understanding of Narita's weather patterns, visit Narita Climate.