Last updated: August 21, 2025
In Nagasaki, Japan, January offers a chilly yet captivating winter experience, with average temperatures hovering around 8°C (47°F). Daily highs can reach up to 18°C (65°F), providing brief moments of warmth against the winter chill, while nighttime lows can dip to 0°C (32°F). This month sees 61 mm (2.4 in) of precipitation over approximately 8 days, contributing to a relatively high humidity level of 73%. Visitors can expect a mix of brisk weather, scenic coastal views, and the enchanting atmosphere that winter brings to this historic city.
In Nagasaki, January brings a cool, refreshing climate, with temperatures ranging from a brisk 0°C (32°F) at night to a pleasant 18°C (65°F) during the day. The average temperature hovers around 8°C (47°F), making it an ideal time for visitors to explore the city's rich history without the sweltering heat of summer. As the month progresses into February, temperatures show a slight upward trend, with averages rising to 9°C (48°F), yet nighttime lows remain steady at 0°C (33°F). This pattern of gradual warming continues into March, where milder weather starts to emerge, setting the stage for the approaching spring. Overall, January serves as a gateway to the warmer seasons, enticing travelers with its crisp air and inviting temperatures.
In Nagasaki, January typically ushers in a modest precipitation total of 61 mm (2.4 in), making it one of the drier months of the year. With rain falling on about 8 days, January sits at a lower end of the spectrum compared to the subsequent months, where precipitation significantly increases, especially in July, which sees a striking 442 mm (17.4 in) over 18 days. This trend indicates a gradual buildup in precipitation as the year progresses, peaking during the summer months. By June, for instance, the city experiences 272 mm (10.7 in) across 14 days, marking a notable transition from January's light showers to a season of heavy rainfall.
January in Nagasaki, Japan, brings an average humidity of 73%, setting the stage for a gradual increase as the year progresses. Following the chill of winter, February sees a slight dip to 69%, but as spring approaches, the humidity rises again to 71% in March. A notable surge occurs in April, with levels climbing to 79%, signaling the onset of a more humid climate as the city heads into the summer months. The humidity peaks dramatically in July at 97%, creating a lively, yet sticky atmosphere. Even as autumn begins to settle in, September's 84% keeps the lingering warmth, before tapering to a mild 79% in October and then 75% in November. By December, humidity drops slightly to 72%, offering a brief respite before the cycle begins anew. Overall, Nagasaki's humidity exhibits a clear trend of rising through the warmer months, reflecting the city's distinctive maritime climate.
In Nagasaki, Japan, January ushers in a moderate UV Index of 4, indicating a relatively safe period for sun exposure, with a burn time of 30 minutes for fair-skinned individuals. As the months progress, the UV Index steadily climbs, peaking at an extreme level of 12 from July to August, where just 10 minutes of sun exposure can lead to burns. Notably, the transition from winter to spring brings significant changes: February and March see the UV Index rise to 6 and 8 respectively, along with increasingly aggressive burn times. The persistent extreme levels during summer make it essential for residents and visitors to adopt sun safety measures. As winter returns, December echoes January's levels with another moderate index of 4. For a detailed monthly analysis and tips on how to stay safe under the sun, visit Nagasaki UV Index.
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In Nagasaki, Japan, January marks the beginning of the year with a modest 167 hours of sunshine, setting a quieter tone compared to the upcoming months. As winter transitions into spring, the days gradually grow brighter, culminating in March with 261 hours of sunlight. The sun’s embrace continues to strengthen, reaching its peak in August, where residents bask in an impressive 302 hours before the days start to shorten again. This upward trend from January through to the summer highlights a vibrant seasonal rhythm, while the gradual decline in sunlight during the fall months reminds us of nature's cyclical beauty. Overall, January serves as a gentle precursor to a sunlit year ahead, inviting anticipation for the warmth and brightness the following months will bring.
In Nagasaki, January welcomes a modest 37% chance of sunny weather, marking a period where the sunshine is more elusive compared to the preceding months. As the winter season settles in, the likelihood of clear skies lags behind February's slightly brighter 44%, reflecting a gradual increase in sunshine as winter transitions into spring. This trend continues through March, where the chances dip to 38%, before reaching a healthier 42% in April—setting the stage for a rebirth of sunlight as the year progresses. Interestingly, the chance of sunny days drops to its lowest point during the summer, reflecting the region's unique weather patterns, but it swings back to a more favorable 65% in October, hinting at a tangible shift toward more consistent sunny days. Thus, while January may not be the sunniest month, the gradual rise in sunshine following winter offers hope for brighter days ahead.
In Nagasaki, Japan, January ushers in 10 hours of daylight, marking the shortest days of the year. As winter transitions into early spring, daylight gradually increases, with February and March each witnessing 11 hours of sunlight. This steady progression continues into April and May, where the daylight reaches a delightful 12 and 13 hours, respectively, providing more opportunities to enjoy the awakening natural beauty. The longest days occur in June and July, with 14 hours of radiant sunshine, perfect for summer adventures. However, as August approaches, daylight begins to taper off slightly, transitioning back to 13 hours. This decline continues through the fall and into November, where daylight dwindles back to 10 hours, before once again resting at the winter threshold in December. This rhythmic dance of daylight showcases the shifts of the seasons, inviting residents and visitors alike to revel in the changes.
In Nagasaki during January, a brisk wind greets residents and visitors with an average speed of 5.2 m/s (12 mph), marking it as one of the year's windiest months. This lively breeze sets the stage for a gradual decline in wind speeds as winter transitions into spring; by February, the average drops slightly to 5.1 m/s (12 mph), and continues to wane through the early months of the year. As spring takes hold, the wind calms significantly, plummeting to an average of just 4.5 m/s (10 mph) in March and further diminishing to 4.2 m/s (9 mph) by April. This gentle retreat continues into the warmer months, where June sees the calmest winds at 2.7 m/s (6 mph). Despite a brief uptick in July and August, the overall trend reflects a gradual easing of wind intensity, culminating in a tranquil atmosphere ideal for enjoying the scenic beauty of Nagasaki as the year progresses.
Weather in Nagasaki varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Nagasaki, focusing on differences in temperature, rainfall, humidity, and UV levels.
In January, temperatures in Nagasaki range from a minimum of 0°C (32°F) to a maximum of 18°C (65°F), with an average of 8°C (47°F). The month typically experiences 61 mm (2.4 in) of precipitation over 8 days and has a humidity level of 73%. In contrast, February sees a slight increase in average temperature to 9°C (48°F), with a minimum still at 0°C (33°F) and a maximum of 17°C (63°F). However, February is generally wetter, receiving 106 mm (4.2 in) of precipitation over 10 days, and humidity levels decrease slightly to 69%. For more detailed information, you can check Nagasaki weather in February.
In January, the weather is notably cooler, with temperatures ranging from a minimum of 0°C (32°F) to a maximum of 18°C (65°F) and an average temperature of 8°C (47°F). There are about 8 days of precipitation, totaling 61 mm (2.4 in), and humidity levels are relatively high at 73%. In contrast, March brings a noticeable warming trend, with temperatures starting at a minimum of 5°C (41°F) and reaching up to 20°C (68°F), averaging 12°C (54°F). However, March also sees increased precipitation, with 157 mm (6.2 in) distributed over approximately 12 days and humidity remaining slightly lower at 71%. For more detailed information about the weather during this time, you can check Nagasaki weather in March.
In January, the weather in Nagasaki is generally cooler, with temperatures ranging from a minimum of 0°C (32°F) to a maximum of 18°C (65°F) and an average of 8°C (47°F). The month sees about 61 mm (2.4 in) of precipitation over approximately 8 days, with a humidity level of 73%. By April, the climate shifts significantly, with warmer temperatures ranging from a minimum of 7°C (46°F) to a maximum of 23°C (73°F) and an average of 15°C (60°F). Precipitation increases to 143 mm (5.6 in) over 9 days, accompanied by a slight rise in humidity to 79%. For more detailed information on weather conditions during this month, you can check out Nagasaki weather in April.
In comparison to January, May experiences significantly warmer temperatures, with averages rising from 8°C (47°F) in January to 19°C (67°F) in May. The minimum in May starts at a comfortable 12°C (54°F) and peaks at a pleasant 25°C (77°F). However, May also brings increased precipitation, with 229 mm (9.0 in) over 11 days, compared to January's 61 mm (2.4 in) and 8 rainy days. Additionally, humidity levels are higher in May at 87%, compared to January's 73%. For a detailed look at May weather in Nagasaki, visit Nagasaki weather in May.
January and June in Nagasaki present dramatically different weather conditions. In January, temperatures range from a chilly 0°C (32°F) at night to a mild 18°C (65°F) during the day, with an average of 8°C (47°F). The month sees about 61 mm (2.4 in) of precipitation over approximately 8 days, contributing to a humidity level of 73%. In contrast, June enjoys much warmer temperatures, with minimums of 18°C (64°F) and maximums reaching 27°C (81°F), averaging 22°C (73°F). However, it is also the wettest month, accumulating 272 mm (10.7 in) of rainfall across 14 days, and a higher humidity level of 91%. The stark differences in temperature and precipitation highlight the transition from winter to summer. For more details on June weather, visit Nagasaki weather in June.
In January, the weather in Nagasaki is quite cool, with temperatures ranging from a minimum of 0°C (32°F) to a maximum of 18°C (65°F) and an average of 8°C (47°F). The month sees about 61 mm (2.4 in) of precipitation over approximately 8 days, accompanied by a humidity level of 73%. In contrast, July boasts much warmer temperatures, with a minimum of 21°C (70°F), an average of 26°C (79°F), and a high of 32°C (89°F). The summer month is also considerably wetter, recording 442 mm (17.4 in) of rainfall over roughly 18 days, along with a high humidity of 97%. For more details, check out Nagasaki weather in July.
In January, Nagasaki experiences cooler temperatures, with a minimum of 0°C (32°F) and an average of 8°C (47°F), while the maximum can reach up to 18°C (65°F). The month is relatively dry, with a total precipitation of 61 mm (2.4 in) spread over about 8 days, accompanied by a humidity level of 73%. In stark contrast, August brings much warmer weather, with temperatures ranging from a minimum of 21°C (69°F) to an average of 28°C (82°F), peaking at a maximum of 33°C (93°F). This summer month has a significantly higher total precipitation of 326 mm (12.8 in) over approximately 14 days, along with an increased humidity level of 94%. For more detailed insights into August weather, you can visit Nagasaki weather in August.
In January, the weather is notably cooler, with temperatures ranging from a minimum of 0°C (32°F) to a maximum of 18°C (65°F), and an average of 8°C (47°F). This month experiences about 61 mm (2.4 in) of precipitation spread over 8 days, contributing to a humidity level of 73%. In contrast, September brings warmer weather, with temperatures starting at a minimum of 19°C (66°F) and peaking at 32°C (90°F), averaging around 25°C (77°F). The increase in rainfall is significant, with 225 mm (8.9 in) recorded over approximately 14 days, resulting in a higher humidity of 84%. For more insights on September weather, check out Nagasaki weather in September.
January and October showcase contrasting weather patterns. January features cooler temperatures, with a minimum of 0°C (32°F) and an average of 8°C (47°F), while October enjoys milder conditions, starting at a minimum of 14°C (57°F) and an average of 20°C (69°F). Precipitation during January totals 61 mm (2.4 in) over 8 days, whereas October sees a significant increase to 117 mm (4.6 in) over the same number of days. Humidity levels also differ slightly, with January at 73% and October at 79%, contributing to a more humid feel as the year progresses. For more detailed information, you can check Nagasaki weather in October.
January weather is notably cooler than that of November, with temperatures ranging from a chilly minimum of 0°C (32°F) to a maximum of 18°C (65°F), while November enjoys milder temperatures, starting at a minimum of 8°C (46°F) and peaking at 23°C (74°F). Precipitation levels also vary, with January receiving 61 mm (2.4 in) over 8 days compared to November's 81 mm (3.2 in) across 9 days, indicating a slightly wetter month. Humidity levels are quite similar, with January at 73% and November slightly higher at 75%. For more detailed information about November weather, you can visit Nagasaki weather in November.
In January, the weather is generally cooler compared to December, with minimum temperatures dropping to around 0°C (32°F) and maximum temperatures peaking at 18°C (65°F). The average temperature in January is about 8°C (47°F), while December experiences slightly milder conditions with an average of 10°C (51°F) and maximums reaching 22°C (71°F). Moreover, January receives 61 mm (2.4 in) of precipitation over 8 days, which is less rainy than December, which has 92 mm (3.6 in) of precipitation also over the same number of days. The humidity levels are quite similar, hovering around 73% in January and 72% in December. For a more detailed understanding of the weather conditions in December, you can visit Nagasaki weather in December.
As January rolls into Nagasaki, the city experiences a refreshing change from the milder months of autumn. This winter month brings cool temperatures that average around 8°C (47°F), with brisk days and chilly nights. Precipitation is moderate, occurring on approximately eight days, which adds a touch of moisture to the air and increases the humidity levels to about 73%. Compared to the warmer months, January presents a cooler, more subdued atmosphere, inviting locals and visitors alike to partake in the seasonal charm unique to this time of year. For a deeper dive into how Nagasaki's weather unfolds throughout the year, explore the comprehensive details at Nagasaki Climate.