Last updated: August 21, 2025
In January, Atami, Japan experiences a diverse range of temperatures, with a maximum of 18°C (64°F) and a minimum dipping to -2°C (29°F). The average temperature hovers around a cool 7°C (44°F), making it a brisk month. January witnesses 68 mm (2.7 in) of precipitation across approximately five days, contributing to the area's 76% humidity. This blend of mild temperatures and seasonal rain creates a unique, refreshing atmosphere for visitors exploring the beauty of Atami during winter.
In January, Atami, Japan, experiences a cool and crisp climate, with temperatures ranging from a brisk -2°C (29°F) to a pleasant 18°C (64°F). This lively coastal city sees an average temperature of about 7°C (44°F), indicative of the winter chill while still allowing for mild afternoons. As the month progresses into February, temperatures barely shift, maintaining a similar range but gradually inching up toward 19°C (67°F) during the day. The transition into March showcases a slight warming trend, with average temperatures climbing to 11°C (51°F), hinting at the approaching spring. As you move into the following months, the temperature steadily rises, peaking in the summer’s embrace, yet January remains a cozy starting point for the year, perfectly balancing winter's chill and the coming warmth of renewal.
January sees Atami, Japan experiencing a relatively mild start to the year with a total precipitation of 68 mm (2.7 in) spread over just 5 days. This sets the stage for a gradual increase as the months progress—February brings slightly higher rainfall, but it's March that marks a significant uptick, with precipitation soaring to 196 mm (7.7 in) over 13 days. The trend continues into the warmer months, peaking in July with a staggering 326 mm (12.8 in) across 19 days. This seasonal pattern underscores Atami's distinct climate, where early winter yields to a dynamic spring and a sultry summer marked by heavy downpours, ultimately tapering off into drier months as the year winds down.
In January, Atami experiences a humidity level of 76%, setting the stage for a moist winter ambiance. This trend shows a gradual decrease in humidity until March, reaching 70%, before it begins to rise again as spring approaches. From May, humidity surges to 81%, indicating the onset of the warmer months, which culminate in the peak summer humidity of 93% in July. Following this peak, humidity levels remain high throughout late summer and early autumn, with August and September hovering around 90% and 86%, respectively. As the year draws to a close, humidity begins a steady decline, yet it remains significantly elevated in the 78% range by December, showcasing Atami's characteristic maritime climate. This pattern illustrates not only the seasonal shifts but also the region's commitment to lush, verdant landscapes year-round.
In January, Atami, Japan experiences a moderate UV Index of 4, indicating a burn time of about 30 minutes for most individuals. This sets the stage for a gradual increase in UV radiation as winter transitions into spring. By February, the UV Index rises to 6, categorized as high, with a reduced burn time of 25 minutes. The trend continues sharply into March and April, where the Index leaps to 8 and 10, respectively, both marked as very high, which significantly shortens the safe sun exposure time to just 15 minutes. As spring gives way to summer, this intensity peaks in May and June at an extreme 11, where sun protection becomes crucial, as the risk of burning drops to just 10 minutes. July and August maintain this extreme level, while September sees a slight decrease to a very high 10. October and November offer a reprieve with moderate UV levels of 7 and 5, allowing for safer outdoor activities with 25 and 30 minutes of burn time. December rounds off the year similar to January with a UV Index of 4. To navigate these fluctuations safely, check out the detailed guide here: Atami UV Index.
UV Risk Categories
In Atami, Japan, the turn of the year brings a cozy 189 hours of sunshine in January, setting the stage for a gradual increase as the seasons transition. As February rolls in, sunshine hours soar to 225, and March begins to shine brighter still with 249 hours. The trend continues into spring, with April basking in 260 hours, leading to May’s peak at 282 hours—the sun truly embraces Atami during this time. As summer arrives, August takes the crown with an impressive 285 hours, offering sunny beach days aplenty. However, as the year progresses towards autumn, the sunlight gently wanes, dropping to 236 hours in September and tapering off to 201 hours by October. Despite the decline, November and December sustain a respectable amount of sunshine, with 223 and 227 hours, respectively. Overall, Atami's sunshine pattern reflects the warmth and vibrancy of its four seasons, inviting visitors to experience its radiant charm throughout the year.
In Atami, Japan, January brings a favorable 59% chance of sunny weather, making it one of the more promising months for sun seekers. While February sees an upward trend, boasting a 66% likelihood of sunshine, the following months experience a gradual decline, particularly in spring and summer, where March drops to 39% and May falls to a mere 25%. Interestingly, as the year progresses, the chances of sunny days rebound in the fall, with November reaching 62% and December peaking at 72%. Overall, January offers a bright start to the year, dotted with opportunities for sunshine amidst the shifting patterns of weather that Atami experiences throughout the seasons.
In January, Atami, Japan enjoys 10 hours of daylight, setting the stage for a gradual shift towards longer days. This duration remains consistent into February, but as March approaches, daylight begins to expand, reaching 11 hours. The trend continues into the spring months, with April offering a welcoming 13 hours, and May peaking at a vibrant 14 hours of daylight. This abundance persists through June and July, maintaining the 14-hour mark, before slightly tapering off in August to 13 hours. As autumn arrives, daylight diminishes gradually, with 12 hours in September and declining further to 10 hours by November. By December, days shorten to just 9 hours, marking a seasonal retreat before the cycle begins again. Overall, Atami experiences a harmonious rhythm of daylight that beautifully transitions from winter's brief illumination to the generous brightness of summer.
In Atami, Japan, the winds of January bring a gentle embrace, with an average speed of 3.3 m/s (7 mph), setting a tranquil tone for the year ahead. As the seasons transition into February, the winds pick up slightly, reaching 3.7 m/s (8 mph), before dipping to their calmest in summer months—2.0 m/s (4-5 mph) in both June and July. Interestingly, autumn sees a resurgence in wind speed, climbing back to 3.1 m/s (7 mph) in November, harmonizing with the energy of changing leaves. December mirrors January's gentle breeze, wrapping up the year at 3.3 m/s (7 mph). This pattern reveals that while January's winds are a harbinger of winter's serenity, the overall trend illustrates a subtle ebb and flow throughout the year, marked by invigorating bursts amidst tranquil periods.
Weather in Atami varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Atami, focusing on differences in temperature, rainfall, humidity, and UV levels.
January and February exhibit similar average temperatures, with January featuring a minimum of -2°C (29°F) and a maximum of 18°C (64°F), while February sees slightly milder temperatures, ranging from -1°C (30°F) to 19°C (67°F). Precipitation levels also increase from January to February, rising from 68 mm (2.7 in) over 5 days in January to 83 mm (3.2 in) over 8 days in February. Despite these differences, both months maintain a relatively high humidity, around 76% for January and slightly lower at 74% for February. For a closer look at the weather patterns, you can check Atami weather in February.
In January, temperatures in Atami range from a chilly -2°C (29°F) to a mild 18°C (64°F), with an average of 7°C (44°F). The month sees about 68 mm (2.7 in) of precipitation over approximately 5 days, while humidity levels hover around 76%. In contrast, March brings noticeably warmer weather, with temperatures ranging from 1°C (34°F) to a high of 22°C (72°F) and an average of 11°C (51°F). However, it also sees a significant increase in rainfall, totaling 196 mm (7.7 in) over 13 days, although humidity decreases slightly to 70%. For more detailed information on March weather in Atami, you can visit Atami weather in March.
In January, the weather tends to be quite cold, with temperatures ranging from a minimum of -2°C (29°F) to a maximum of 18°C (64°F) and an average of 7°C (44°F). The month sees approximately 68 mm (2.7 in) of precipitation over about 5 days, coupled with a high humidity level of 76%. In contrast, April offers a much milder climate, with temperatures starting at a minimum of 3°C (38°F) and peaking at 24°C (76°F), averaging around 14°C (57°F). However, it also brings increased rainfall, totaling 168 mm (6.6 in) across 11 days, while humidity remains relatively similar at 74%. For more details on April's weather, you can check Atami weather in April.
In January, the weather is quite cool with temperatures ranging from a chilly -2°C (29°F) at night to a mild maximum of 18°C (64°F) during the day. The month experiences moderate precipitation, totaling 68 mm (2.7 in) over about five days, alongside a humidity level of 76%. In contrast, May brings much warmer temperatures, with a minimum of 9°C (48°F) and a daytime average of 18°C (65°F) peaking at 28°C (82°F). However, May is significantly wetter, with 194 mm (7.6 in) of precipitation spread across 12 days and a higher humidity level of 81%. This stark difference in both temperature and rainfall highlights the transition from winter to early summer. For more details on May weather, you can check out Atami weather in May.
In January, the weather is quite chilly, with temperatures ranging from a minimum of -2°C (29°F) to a maximum of 18°C (64°F), and an average of 7°C (44°F). This month sees about 68 mm (2.7 in) of precipitation over 5 days, accompanied by a humidity level of 76%. In stark contrast, June brings much warmer conditions, with temperatures starting at a minimum of 15°C (59°F) and reaching up to 29°C (85°F), averaging around 21°C (71°F). The month is also significantly wetter, experiencing 263 mm (10.3 in) of rain over 17 days, along with higher humidity at 88%. For more details on the weather in June, visit Atami weather in June.
In January, the weather is typically cool, with temperatures ranging from a minimum of -2°C (29°F) to a comfortable maximum of 18°C (64°F). Precipitation is relatively light, totaling 68 mm (2.7 in) over about 5 days, and the humidity hovers around 76%. In contrast, July brings much warmer conditions, with temperatures reaching between 18°C (65°F) and a maximum of 33°C (92°F), and an average of 25°C (77°F). July also sees significantly more rainfall, with precipitation totaling 326 mm (12.8 in) across 19 days, leading to higher humidity levels of 93%. For more specific insights into July weather, you can check Atami weather in July.
The weather in January is characterized by cool temperatures, with minimums reaching as low as -2°C (29°F) and average highs around 18°C (64°F). In contrast, August brings warmth, with temperatures ranging from a minimum of 20°C (68°F) to a sweltering maximum of 34°C (94°F), making it significantly warmer than January. Additionally, January experiences lower humidity levels at 76% and less precipitation, averaging 68 mm (2.7 in) over about 5 days, whereas August sees a much higher total of 176 mm (6.9 in) spread across 17 days, along with increased humidity of 90%. For more detailed insights, check out Atami weather in August.
The weather in January is characterized by much cooler temperatures, with averages ranging from a chilly -2°C (29°F) at night to a mild 18°C (64°F) during the day. In contrast, September brings a noticeable warmth, with temperature lows around 15°C (60°F) and daytime highs reaching up to 33°C (91°F). Additionally, January experiences moderate precipitation of 68 mm (2.7 in) over just 5 days, while September sees significantly more rainfall totaling 221 mm (8.7 in) spread across 20 days. The humidity also increases from 76% in January to 86% in September, contributing to a distinctly different atmosphere. For more specific details, you can check out Atami weather in September.
January and October present contrasting weather patterns. In January, temperatures range from a chilly -2°C (29°F) at night to a mild average of 7°C (44°F) during the day, peaking at 18°C (64°F). Precipitation is relatively low, with about 68 mm (2.7 in) falling over just 5 days and humidity levels at 76%. In stark contrast, October boasts much warmer temperatures, beginning at a comfortable minimum of 11°C (52°F), averaging 19°C (66°F), and reaching a high of 29°C (84°F). However, it also brings significantly more rainfall, totaling 305 mm (12.0 in) across 16 days and a slightly higher humidity of 83%. For those interested in specifics, check out Atami weather in October.
January and November exhibit distinct differences in weather patterns. In January, temperatures range from a chilly minimum of -2°C (29°F) to a mild maximum of 18°C (64°F), averaging 7°C (44°F). In contrast, November experiences milder conditions, with temperatures ranging from a minimum of 3°C (38°F) to a warmer maximum of 22°C (72°F) and an average of 14°C (58°F). Additionally, January sees lower precipitation at 68 mm (2.7 in) over 5 days, while November receives more rain at 94 mm (3.7 in) across 10 days, and the humidity levels are slightly higher in November at 80% compared to January’s 76%. For more insights on November weather, you can visit Atami weather in November.
In January, temperatures in Atami range from a chilly minimum of -2°C (29°F) to a maximum of 18°C (64°F), with an average of around 7°C (44°F). The month experiences about 68 mm (2.7 in) of precipitation over 5 days, and the humidity is relatively high at 76%. In contrast, December offers milder weather, with minimum temperatures at 0°C (32°F) and maximums reaching 21°C (69°F) for an average of 9°C (49°F). The precipitation in December is slightly higher at 74 mm (2.9 in), observed over 8 days, and the humidity is marginally elevated at 78%. For more detailed insights, you can explore Atami weather in December.
In January, Atami's weather offers a refreshing shift from the warmer months, with cooler temperatures and a notable increase in humidity. As the average temperature hovers around a brisk 7°C (44°F), visitors can expect the serene beauty of the coastline accompanied by occasional rainfall, totaling about 68 mm over just a handful of days. This winter month contrasts sharply with the more temperate climate of spring and summer, inviting travelers to experience Atami's unique charm while embracing its crisp air. For a deeper dive into the annual trends, check out Atami Climate.