🇯🇵 Shizuoka Prefecture Weather Report – Month-by-Month Overview
❄️ January
Cool and dry. Shizuoka City averages 4–12°C. Snow is rare in coastal areas but possible in mountain regions like the Southern Alps. Skies are mostly clear, and rainfall is minimal.
🌨️ February
Still mild. Highs reach 12–14°C, with lows around 5°C. Occasional frost inland. Rainfall remains low, and sunshine hours increase slightly.
🌱 March
Spring begins. Temperatures rise to 13–18°C. Plum blossoms bloom, and rainfall increases. Coastal areas warm faster, while inland valleys stay crisp.
🌸 April
Mild and vibrant. Highs reach 18–23°C. Cherry blossoms peak across the prefecture, especially around Sunpu Castle and along the Abe River. Rain showers alternate with sunny spells.
🌼 May
Warm and pleasant. Temperatures climb to 21–26°C. Rainfall is light, and skies are mostly clear. Ideal for hiking, tea field visits, and countryside travel.
☀️ June
Start of the rainy season. Highs range from 24–29°C. Humidity rises, and afternoon showers are frequent. Rivers swell, and vegetation flourishes.
🔥 July
Hot and humid. Temperatures reach 28–34°C. Rainfall peaks early, then tapers off. Summer festivals begin, and evenings stay warm and muggy.
🏖️ August
Still hot. Highs remain between 29–35°C. Rain is infrequent, and sunshine dominates. Beaches and coastal towns like Shimoda are popular for swimming and fireworks.
🍂 September
Transition to autumn. Temperatures ease to 25–31°C. Rain returns gradually, and typhoon activity may affect coastal areas. Nights begin to cool.
🌦️ October
Cooler and clearer. Highs drop to 19–26°C. Rainfall decreases, and autumn foliage begins in the mountains. Ideal for travel and photography.
🌫️ November
Chilly and dry. Highs hover around 14–21°C, with lows near 9°C. Rain is minimal, and foggy mornings are common. Fall colors peak inland.
🎄 December
Winter returns. Temperatures range from 6–13°C. Snow is rare, but mountain areas may see frost. Skies are mostly clear, and festive lights appear in towns.
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Shizuoka, Japan: Monthly Weather ReportShizuoka, located in Japan’s Chubu region along the Pacific coast, experiences a humid subtropical climate (Köppen classification: Cfa), characterized by mild winters, hot and humid summers, and significant rainfall throughout the year. Positioned in Suruga Bay, between Nagoya and Tokyo, Shizuoka benefits from its coastal location and the protection of the nearby Akaishi Mountains and Mount Fuji, which moderate its winter temperatures. This report provides a detailed breakdown of Shizuoka’s weather by month, based on climate data averaged over recent decades (1991–2020), including temperature, precipitation, sea temperature, daylight hours, and sunshine, with insights into the best and worst times to visit. Data is primarily sourced from the Japan Meteorological Agency, Weather Atlas, and other reliable climate resources. 
JanuaryJanuary is Shizuoka’s coldest month, with an average temperature of 6.9°C (44.4°F), ranging from a minimum of 2°C (35.7°F) to a maximum of 8.9°C (48°F). The city experiences mild winters compared to inland Japan, with rare snowfall due to its coastal location and southern exposure. Precipitation is relatively low, averaging 71 mm (2.8 inches) over 11 days, making it one of the driest months. Daylight lasts about 10 hours and 5 minutes, with 6.5 hours of sunshine daily (66% of the time). The sea temperature averages 16.3°C (61.3°F), too cold for swimming. Humidity is moderate at 57%, and wind speeds average 7 mph. January’s cool and relatively dry conditions make it less ideal for outdoor activities, favoring indoor exploration. FebruaryFebruary remains cool, with an average temperature of 7.2°C (46°F), ranging from 2.5°C (36.5°F) to 9.7°C (49.5°F). It is the month with the coldest sea temperature at 15.4°C (59.7°F), unsuitable for aquatic activities. Precipitation increases slightly to 99 mm (3.9 inches) over 12 days. Daylight extends to 10 hours and 55 minutes, with 6.5 hours of sunshine (60% of the time). Humidity stays at 57%, and winds remain at 7 mph. The gradual increase in daylight hints at the approaching spring, but February’s chilly conditions make it less hospitable for outdoor plans, similar to January. MarchMarch marks the transition to spring, with average temperatures rising to 10.6°C (51°F), ranging from 4.8°C (40.7°F) to 12.6°C (54.7°F). Precipitation increases significantly to 211 mm (8.3 inches) over 17 days, reflecting the onset of wetter spring weather. The sea temperature is 15.5°C (59.9°F), still cold for swimming. Daylight reaches 12 hours, with 6 hours of sunshine (51% of the time). Humidity rises to 62%, and winds remain at 7 mph. March’s milder temperatures and blooming cherry blossoms (peaking around March 30) make it a more inviting time for visitors, especially for hanami (cherry blossom viewing). AprilApril brings pleasant spring weather, with an average temperature of 15°C (59°F), ranging from 9.2°C (48.5°F) to 16.6°C (61.9°F). Precipitation is high at 236 mm (9.3 inches) over 16 days, but the warming trend enhances outdoor appeal. Sea temperatures rise to 17.3°C (63.1°F), still cool for swimming. Daylight extends to 13 hours and 5 minutes, with 6 hours of sunshine (47% of the time). Humidity increases to 65%, and winds average 7 mph. April’s blossoming landscapes and moderate temperatures make it one of the best months to visit, particularly for springtime activities. MayMay sees warmer conditions, with an average temperature of 18.3°C (67°F), ranging from 13.5°C (56.3°F) to 20.5°C (68.9°F). Precipitation remains high at 221 mm (8.7 inches) over 17 days. The sea warms to 19.3°C (66.7°F), approaching suitability for swimming. Daylight reaches 14 hours, with 6 hours of sunshine (43% of the time). Humidity rises to 71%, and winds drop slightly to 6 mph. May’s pleasant temperatures and vibrant greenery make it an excellent time for outdoor exploration, though rainfall requires planning. JuneJune ushers in summer, with an average temperature of 21.8°C (73°F), ranging from 17.9°C (64.2°F) to 23.3°C (73.9°F). It is one of the wettest months, with 284 mm (11.2 inches) of rain over 20 days, driven by the summer monsoon. Sea temperatures reach 21.8°C (71.2°F), barely acceptable for swimming. Daylight peaks at 14 hours and 30 minutes, but sunshine drops to 4.5 hours (32% of the time) due to cloud cover. Humidity climbs to 77%, and winds remain at 6 mph. June’s warm, muggy conditions are less ideal for visitors, but the lush scenery attracts some travelers. JulyJuly is hot and humid, with an average temperature of 25.7°C (80°F), ranging from 21.9°C (71.4°F) to 27°C (80.5°F). Precipitation peaks at 279 mm (11 inches) over 20 days, and typhoons may occur. The sea temperature rises to 25.5°C (77.9°F), ideal for swimming. Daylight lasts 14 hours and 10 minutes, with 5 hours of sunshine (35% of the time). Humidity reaches 87%, and winds are at 6 mph. July’s warm sea and long daylight hours make it appealing for beach activities, despite frequent rain. AugustAugust is the warmest month, with an average temperature of 27.8°C (82°F), ranging from 22.9°C (73.3°F) to 27.9°C (82.3°F). It also has the highest sea temperature at 26.6°C (79.9°F), perfect for swimming. Precipitation is high at 244 mm (9.6 inches) over 18 days, with a risk of typhoons. Daylight lasts 13 hours and 30 minutes, with 6.5 hours of sunshine (48% of the time), the sunniest summer month. Humidity remains high at 86%, and winds are at 6 mph. August is a prime time for coastal activities, though typhoon risks require vigilance. SeptemberSeptember marks the start of autumn, with an average temperature of 24.2°C (77°F), ranging from 20.4°C (68.7°F) to 25.3°C (77.5°F). It is the wettest month, with 305 mm (12 inches) of rain over 19 days, and typhoons are common. Sea temperatures remain warm at 25.8°C (78.4°F), suitable for swimming. Daylight drops to 12 hours and 24 minutes, with 5 hours of sunshine (40% of the time). Humidity is 83%, and winds are at 6 mph. September’s warmth is inviting, but heavy rain and typhoon risks make it less favorable. OctoberOctober offers pleasant autumn weather, with an average temperature of 19.4°C (67°F), ranging from 15.4°C (59.7°F) to 20.8°C (69.4°F). Precipitation decreases to 170 mm (6.7 inches) over 17 days. Sea temperatures cool to 23.7°C (74.7°F), still viable for swimming. Daylight lasts 11 hours and 18 minutes, with 5 hours of sunshine (44% of the time). Humidity drops to 79%, and winds remain at 6 mph. October’s comfortable temperatures and colorful foliage make it an excellent time to visit. NovemberNovember brings cooler weather, with an average temperature of 14.4°C (58°F), ranging from 9.8°C (49.6°F) to 16°C (60.9°F). Precipitation is 135 mm (5.3 inches) over 12 days. Sea temperatures drop to 20.9°C (69.6°F), less suitable for swimming. Daylight shortens to 10 hours and 24 minutes, with 5.5 hours of sunshine (53% of the time). Humidity is 75%, and winds are at 6 mph. November’s crisp air and scenic beauty make it a great time for outdoor activities. DecemberDecember is cool, with an average temperature of 9.4°C (49°F), ranging from 4.6°C (40.2°F) to 11.1°C (52.1°F). It is the driest month, with 61 mm (2.4 inches) of rain over 10 days. Sea temperatures fall to 17.9°C (64.2°F), too cold for swimming. Daylight is shortest at 9 hours and 54 minutes, with 6.5 hours of sunshine (66% of the time). Humidity is 67%, and winds are at 6 mph. December’s chilly weather is less ideal for outdoor pursuits, favoring indoor activities. Best and Worst Times to VisitThe best times to visit Shizuoka are mid-April to mid-May and late October to mid-November, offering pleasant temperatures (15–20°C), vibrant scenery, and moderate rainfall. Cherry blossoms in late March to early April add appeal. August is also favorable for beach activities due to warm sea temperatures (26.6°C) and more sunshine, though typhoon risks persist. The least favorable months are December to February, with cooler temperatures (6.9–7.2°C), shorter daylight (9.8–10.9 hours), and less outdoor-friendly conditions. September’s heavy rainfall (305 mm) and typhoon risks also make it less appealing. Recent TrendsRecent posts on X highlight extreme heat in Japan, with temperatures reaching 41.8°C (107°F) in Isesaki on August 5, 2025, suggesting Shizuoka may experience similar heatwaves in summer. These anomalies underscore the importance of monitoring real-time forecasts, especially in August and September when typhoons and heatwaves are risks.ConclusionShizuoka’s climate offers diverse experiences, from mild winters to hot, rainy summers. Spring and autumn provide the most comfortable conditions for visitors, while summer suits beachgoers despite monsoon and typhoon challenges. Winter is quieter, better for indoor activities. With annual precipitation of 2,300–2,569 mm and temperatures ranging from 5.1°C to 27.8°C, Shizuoka’s weather is dynamic, requiring tailored planning for travel.
