Saga Climate

Last updated: January 18, 2025

Saga, Japan, showcases a Cfa Köppen-Geiger climate classification, characterized by warm summers and mild winters. The region experiences a minimum temperature of -4°C (25°F) in February, while average temperatures hover around 17°C (63°F) throughout the year. The peak of summer brings sweltering conditions, with maximum temperatures reaching up to 38°C (100°F) in August. This dynamic temperature range highlights the seasonal contrasts that define Saga's climate, influencing both local ecosystems and human activities.

Saga temperature by month

Saga, Japan experiences distinct seasonal temperature patterns throughout the year, beginning with chilly winters where January and February see minimum temperatures plummet to -4°C (25°F), gradually rising to an average of 7°C (45°F). As spring approaches in March, temperatures begin to warm, with averages hitting 11°C (53°F), and by April, pleasant conditions emerge, reaching up to 29°C (84°F) during the day. The summer months of June, July, and August bring the peak heat, with average highs soaring to 28°C (83°F) and extreme maximums touching 38°C (100°F). With the arrival of autumn in September, temperatures start to cool down again, drifting back to 25°C (76°F) on average, before settling into cooler conditions once more in November and December, where the cycle concludes with temperatures varying from -2°C (28°F) to 14°C (57°F). This dramatic fluctuation not only highlights the region's climatic diversity but also shapes the lifestyle and agricultural practices of its inhabitants.

Monthly Temperatures in Saga, Japan

The chart illustrates Saga's temperature patterns throughout the year, with values aggregated from various locations across the region. It highlights seasonal variations and temperature changes across the months.
JanFebMarAprMayJunJulAugSepOctNovDec444552596773808376675748
Data source: Saga temperature data aggregated from multiple regional locations, generated using Copernicus Climate Change Service information.
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The average of daily temperatures (24 hours) calculated across all days in the month.

Arita and Imari experience the same temperature range, with minimums dropping to -2°C (28°F) in January and maximums soaring to 38°C (100°F) in August, as detailed in their respective climate links: monthly temperatures in Arita and monthly temperatures in Imari. In contrast, Karatsu has slightly milder winter conditions, with a minimum temperature of -1°C (31°F) in January and a lower maximum of 33°C (92°F) in August, which can be explored further at monthly temperatures in Karatsu.

Precipitation Patterns in Saga

Saga, Japan experiences a varied precipitation pattern throughout the year, with the wettest months occurring during the height of summer. In July, the region receives a substantial 398 mm (15.7 in) of rain, accompanied by an average of 18 rainy days, which characterizes its humid, subtropical climate. The monsoon influence is further evident in August, where precipitation remains high at 311 mm (12.3 in) with 14 rainy days. Conversely, the winter months maintain relatively lower rainfall, with January receiving only 57 mm (2.2 in) across 7 days, providing a stark contrast to the summer deluge.

As spring transitions into summer, precipitation levels increase noticeably, particularly in May, which averages 188 mm (7.4 in) of rainfall over 11 days. This trend continues into June, where 219 mm (8.6 in) are recorded over 13 days, leading into the peak rainfall period in July. Meanwhile, early autumn months like September also retain significant rainfall at 217 mm (8.5 in), although the number of rainy days decreases compared to July. Overall, with an annual precipitation total heavily skewed towards the warmer months, the climate in Saga supports both lush vegetation and diverse agricultural activities.

Monthly Average Precipitation in Saga, Japan

The average monthly precipitation in Saga, providing insights into seasonal rainfall patterns and the region's precipitation trends throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec57841381251882193983112171176077
Data source: Saga precipitation data aggregated from multiple regional locations, generated using Copernicus Climate Change Service information.
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Sunshine Duration in Saga

In Saga, Japan, sunshine duration exhibits a clear seasonal rhythm, with a marked increase from winter to summer. January welcomes the year with only 170 hours of sunshine, gradually brightening into February with 229 hours. As spring unfolds, March sees a substantial rise to 260 hours, culminating in April, where the average reaches 279 hours. May carries this momentum forward, peaking at 282 hours, as the days grow longer and warmer, offering a delightful precursor to the summer months ahead.

The summer season truly shines in Saga, with August standing out as the sunniest month, boasting an impressive 297 hours of sunlight. Despite slight dips in sunshine during the transition months of June and July, which receive 263 hours and 268 hours respectively, the trend remains positive. As autumn sets in, sunshine hours begin to decline, with September and October both garnering 253 hours, leading into November's 232 hours and December's 206 hours. This cyclical variation not only enhances the region’s beauty but also plays a critical role in agricultural practices, influencing crop growth and seasonal activities throughout the year.

Monthly Sunshine in Saga, Japan

Monthly sunshine duration represents the total hours of direct sunlight Saga receives each month, excluding periods when the sun is obscured by clouds or other obstructions.
JanFebMarAprMayJunJulAugSepOctNovDec170h229h260h279h282h263h268h297h253h253h232h206h
Data source: Saga sunshine duration data aggregated from multiple regional locations, generated using Copernicus Climate Change Service information.

Saga UV Index Trends

In Saga, Japan, the UV Index reflects significant seasonal variation, with levels steadily rising from winter to summer. Starting in January, the UV Index registers at 4, indicating a moderate exposure category with a burn time of 30 minutes. As winter transitions into spring, February sees an increase to 6, classified as high. March marks a pivotal shift, where the UV Index peaks to 8, falling into the very high category, resulting in a reduced burn time of just 15 minutes as the sun's intensity begins to strengthen.

The summer months of June, July, and August witness the highest UV Index readings, consistently hitting 11 or 12, indicating extreme exposure and necessitating quick protective measures with a burn time of only 10 minutes. Even as autumn approaches, September retains a high UV Index of 11, before gradually declining to 7 in October and 6 in November, shifting back to a more moderate 4 by December. Such fluctuations underscore the importance of sun safety awareness throughout the year, particularly during the peak summer months when protective skincare becomes crucial for outdoor activities.

Monthly Maximum UV Index for Saga, Japan

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Saga. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec468111111121211764
Data source: Saga UV Index data aggregated from multiple regional locations, generated using Copernicus Climate Change Service information.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

Daylight Hours in Saga

In Saga, Japan, daylight duration exhibits a clear seasonal pattern, with a gradual increase from winter to summer. January and February both provide approximately 10 hours of daylight, featuring shorter days and a sense of winter's grip. As spring progresses into March, daylight begins to extend, reaching 11 hours, and continues to blossom into April, where it reaches 12 hours. May heralds longer days, boasting 13 hours of daylight as the region fully transitions into spring, setting the stage for the longer days of summer.

The peak daylight duration occurs in June and July, offering 14 hours of sunshine, creating ideal conditions for outdoor activities and fostering a vibrant landscape. As summer wanes, daylight gradually diminishes, dropping to 13 hours in August and 12 hours in September before contracting to 11 hours in October. This decline continues into the winter months, with daylight clocking in at 10 hours in November and shrinking further to 9 hours by December. Overall, these shifts in daylight duration significantly influence the lifestyle and activities of Saga’s residents, marking the rhythm of the seasons throughout the year.

Average Monthly Daylight Hours in Saga, Japan

This chart shows the total daylight hours Saga receives each month, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec612h658h718h779h831h857h844h799h740h679h625h598h
Data source: Saga daylight hours, calculated based on aggregated data for various regional locations, determined by the times between sunrise and sunset.

Climate Highlights of Saga's Popular Destinations

Arita, Japan experiences a range of temperatures throughout the year, with January's lows plummeting to -2°C (28°F) and July peaking at 36°C (97°F). The region sees significant rainfall, particularly in July with 385 mm (15.2 in), while May and June also contribute to high precipitation levels. Sunshine hours vary, with the peak in August at 297 hours, offering bright warm days. Overall, Arita's climate showcases a tropical influence with mild winters and hot, humid summers, making it a unique destination for visitors. For more detailed information, visit Arita climate.

Imari, Japan, experiences a temperate climate with significant variations in temperature and precipitation throughout the year. Winters are relatively cool, with January averaging around 7°C (44°F) and a maximum of 18°C (64°F), while summers can be hot and humid, peaking in July with an average of 27°C (80°F) and maximum temperatures reaching up to 36°C (97°F). Rainfall is abundant, particularly in July, which receives an average of 385 mm (15.2 in) of precipitation. Despite high rainfall in summer, Imari enjoys a considerable amount of sunshine, especially in August, with 297 hours recorded. For more detailed information, visit Imari climate.

The climate in Karatsu, Japan, features distinct seasonal variations, with cold winters and hot, humid summers. January sees temperatures ranging from -1°C to 18°C, while July and August peak with highs around 33°C. Precipitation levels are highest in July at 323 mm, contributing to the humid summer months, whereas November experiences the least rainfall at 53 mm. Sunshine is abundant, particularly in August, which enjoys approximately 305 hours of sunlight. For more details, visit Karatsu climate.

Kashima, Japan experiences a temperate climate characterized by distinct seasons. Winters are cool, with January and February recording minimum temperatures around -1°C (31°F) and moderate precipitation peaking at 89 mm (3.5 in) in February. Summers are warm and humid, especially in July and August, where maximum temperatures can reach 34°C (93°F). Rainfall is abundant during these months, particularly in July with 409 mm (16.1 in), while sunshine is plentiful, especially in August with 297 hours. For more details, visit Kashima climate.

Ureshino, Japan experiences a temperate climate with distinct seasons. Winters are cool, with January temperatures ranging from -2°C (28°F) to 18°C (64°F), while summers are hot and humid, peaking in August with temperatures reaching up to 38°C (100°F). Precipitation is abundant, particularly during July, when it averages 385 mm (15.2 in). Sunshine is prominent from late spring to early summer, with May enjoying about 281 hours of sunlight. For more detailed climate information, visit Ureshino climate.

Conclusion

In conclusion, Saga, Japan, presents a fascinating climate characterized by its seasonal fluctuations in temperature, precipitation, sunshine duration, UV Index, and daylight hours. From the chilly, shorter days of winter to the sweltering heat and abundant sunshine of summer, the region's climatic patterns significantly shape its natural environment and the daily lives of its inhabitants. Understanding these diverse climatic conditions not only highlights the unique beauty of Saga throughout the year but also underscores the importance of adapting lifestyle choices and activities to make the most of each distinct season. As residents navigate the varying levels of UV exposure, rainfall, and daylight, the seamless interplay of these factors continues to define the rhythm of life in Saga, enhancing both the agricultural landscape and the cultural vibrancy of this remarkable region.

Discover the Climate of Saga's Places

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