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Aichi Weather by Month
Aichi Prefecture, located in central Japan, experiences a humid subtropical climate with four distinct seasons: mild springs, hot and humid summers, pleasant autumns, and cool, dry winters. Below is a month-by-month breakdown of the weather, including temperatures, conditions, clothing suggestions, and travel recommendations.
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January
- Average Temperatures: Min 1°C (34°F), Max 11°C (52°F)
- Weather: January is the coldest month in Aichi, with mostly sunny and dry days. Snow is rare in Nagoya and lowland areas but may occur lightly in higher elevations like the Okumikawa region. Humidity is low, around 59%.
- Clothing: Pack a thick winter coat, gloves, scarf, and warm layers like sweaters or long-sleeve shirts. Waterproof boots are useful for occasional rain or rare snow.
- Best Locations to Visit: Nagoya Castle is stunning in the crisp winter air, and Atsuta Shrine is lively with New Year celebrations. Inuyama Castle, one of Japan’s oldest, is less crowded this month.
- Locations to Avoid: Avoid mountainous areas like Okumikawa if unprepared for potential light snow, as roads can be slippery.
- Record Data:
- Record Low: -7.7°C (18°F) in Nagoya (1981)
- Record High: 21.0°C (70°F) in Nagoya (2002)
- Record Rainfall: 121 mm (4.8 inches) in a single day (1976)
- Record Snow: Light dustings, typically less than 5 cm (2 inches) in lowlands.
- Record Wind: 25 m/s (56 mph) during winter storms.
February
- Average Temperatures: Min 2°C (36°F), Max 12°C (54°F)
- Weather: Similar to January, February is cold, sunny, and dry with occasional light rain or snow. Snow clears by mid-month in most areas, and chilly winds are common.
- Clothing: A heavy coat, scarf, gloves, and layered clothing are essential. A hat or ear muffs helps with wind chill.
- Best Locations to Visit: The Nagoya Port area offers indoor attractions like the aquarium, ideal for cold days. Korankei Valley is serene with fewer crowds.
- Locations to Avoid: Coastal areas like the Atsumi Peninsula can feel colder due to sea winds.
- Record Data:
- Record Low: -7.3°C (19°F) in Nagoya (1984)
- Record High: 22.6°C (73°F) in Nagoya (1998)
- Record Rainfall: 115 mm (4.5 inches) in a day (1990)
- Record Snow: Up to 10 cm (4 inches) in rare events in higher elevations.
March
- Average Temperatures: Min 5°C (41°F), Max 15°C (59°F)
- Weather: March marks the transition to spring with milder temperatures and increasing cloud cover. Rainfall is moderate, and cherry blossoms begin blooming late in the month.
- Clothing: Layered clothing, including a medium-weight jacket, long-sleeve shirts, and pants. A light raincoat is useful for showers.
- Best Locations to Visit: Tsuruma Park in Nagoya is perfect for early cherry blossom viewing. The Toyota Commemorative Museum of Industry and Technology is a great indoor option.
- Locations to Avoid: Avoid rural areas without proper rain gear, as showers can be frequent.
- Record Data:
- Record Low: -4.5°C (24°F) in Nagoya (1996)
- Record High: 25.1°C (77°F) in Nagoya (2018)
- Record Rainfall: 150 mm (5.9 inches) in a day (2004).
April
- Average Temperatures: Min 10°C (50°F), Max 20°C (68°F)
- Weather: April is warm and sunny, with cherry blossoms in full bloom early in the month. Rainfall increases slightly, with occasional afternoon showers.
- Clothing: Light jackets, long-sleeve shirts, and comfortable pants. A portable umbrella or raincoat is recommended.
- Best Locations to Visit: Inuyama Castle and the Kiso River are ideal for hanami (cherry blossom viewing). Higashiyama Zoo and Botanical Gardens in Nagoya are vibrant.
- Locations to Avoid: None specifically, though crowded cherry blossom spots like Yamazaki River may be packed.
- Record Data:
- Record High: 28.3°C (83°F) in Nagoya (1998)
- Record Rainfall: 180 mm (7.1 inches) in a day (2001).
May
- Average Temperatures: Min 15°C (59°F), Max 24°C (75°F)
- Weather: May is pleasantly warm with moderate humidity. Rainfall increases as the rainy season approaches, but sunny days are common.
- Clothing: T-shirts, light cardigans, and breathable fabrics. Carry a light raincoat or umbrella.
- Best Locations to Visit: The Tokugawa Art Museum in Nagoya is excellent for indoor exploration. Gamagori’s Takeshima Island is scenic and less crowded.
- Locations to Avoid: Avoid coastal areas like Mikawa Bay during early typhoon activity.
- Record Data:
- Record High: 32.5°C (90°F) in Nagoya (2019)
- Record Rainfall: 190 mm (7.5 inches) in a day (2010).
June
- Average Temperatures: Min 19°C (66°F), Max 27°C (81°F)
- Weather: The rainy season (tsuyu) begins, bringing frequent rain and high humidity. Sunny intervals occur, but overcast skies dominate.
- Clothing: Lightweight, breathable clothing, waterproof shoes, and a sturdy umbrella or raincoat.
- Best Locations to Visit: Indoor attractions like the SCMAGLEV and Railway Park in Nagoya. Okazaki Castle is charming in the rain.
- Locations to Avoid: Outdoor sites like Korankei Valley can be muddy and less enjoyable.
- Record Data:
- Record Rainfall: 256 mm (10.1 inches) in a day in Toyohashi (2000)
- Record High: 35.0°C (95°F) in Nagoya (2018).
July
- Average Temperatures: Min 23°C (73°F), Max 31°C (88°F)
- Weather: The rainy season continues into early July, with high humidity and frequent showers. Late July brings hotter, sunnier days.
- Clothing: Short-sleeve shirts, shorts, and UV-protective hats. A light raincoat is still useful.
- Best Locations to Visit: The Nagoya Sumo Tournament in mid-July is a cultural highlight. Mikawa Bay’s beaches are great for summer activities.
- Locations to Avoid: Avoid low-lying areas prone to flooding during heavy rain.
- Record Data:
- Record Rainfall: 230 mm (9.1 inches) in a day (1994)
- Record High: 38.0°C (100°F) in Nagoya (2018).
August
- Average Temperatures: Min 24°C (75°F), Max 34°C (93°F)
- Weather: August is the hottest and sunniest month, with high humidity and occasional typhoons. Expect 203 hours of sunshine.
- Clothing: Light, airy clothing like tank tops and shorts. Sunglasses, hats, and sunscreen are essential.
- Best Locations to Visit: The Atsumi Peninsula’s beaches are perfect for swimming. Nagoya’s summer festivals, like the World Cosplay Summit, are vibrant.
- Locations to Avoid: Avoid urban areas like central Nagoya without air-conditioned breaks due to intense heat.
- Record Data:
- Record High: 39.0°C (102°F) in Nagoya (2018)
- Record Rainfall: 200 mm (7.9 inches) in a day (2003).
September
- Average Temperatures: Min 21°C (70°F), Max 30°C (86°F)
- Weather: The wettest month, with 209 mm of rainfall over 18 rainy days due to typhoon season. Humidity remains high, but sunny spells occur.
- Clothing: Light clothing with a waterproof jacket and umbrella. Breathable fabrics help with humidity.
- Best Locations to Visit: Indoor sites like the Nagoya City Science Museum. Inuyama’s festivals are lively despite rain.
- Locations to Avoid: Coastal areas like the Atsumi Peninsula during typhoon warnings.
- Record Data:
- Record Rainfall: 300 mm (11.8 inches) in a day during Typhoon Morakot (2009)
- Record High: 36.5°C (98°F) in Nagoya (2010).
October
- Average Temperatures: Min 15°C (59°F), Max 24°C (75°F)
- Weather: Pleasant and mild with moderate rainfall. Autumn foliage begins in higher areas like Korankei.
- Clothing: Light sweaters, long-sleeve shirts, and comfortable pants. A light jacket for evenings.
- Best Locations to Visit: Korankei Valley for early autumn colors. The Nagoya Festival in mid-October is a cultural must-see.
- Locations to Avoid: None specifically, as October is ideal for most areas.
- Record Data:
- Record High: 32.0°C (90°F) in Nagoya (2004)
- Record Rainfall: 210 mm (8.3 inches) in a day (2004).
November
- Average Temperatures: Min 10°C (50°F), Max 18°C (64°F)
- Weather: Cool, dry, and sunny with vivid autumn foliage. Rainfall decreases significantly.
- Clothing: Medium-weight jackets, sweaters, and layered clothing for cooler evenings.
- Best Locations to Visit: Korankei Valley for peak autumn foliage. Okazaki Park is scenic and less crowded.
- Locations to Avoid: None, as November is one of the best months to visit.
- Record Data:
- Record High: 26.5°C (80°F) in Nagoya (1999)
- Record Rainfall: 140 mm (5.5 inches) in a day (1982).
December
- Average Temperatures: Min 4°C (39°F), Max 13°C (55°F)
- Weather: Cold, dry, and sunny with minimal rainfall (59 mm). Light snow is possible but rare in lowlands.
- Clothing: Heavy coat, scarf, gloves, and warm layers. Waterproof shoes for occasional rain.
- Best Locations to Visit: Nagoya’s winter illuminations at Noritake Garden. Meiji Mura in Inuyama for historical charm.
- Locations to Avoid: Avoid high-altitude areas without proper gear due to potential snow.
- Record Data:
- Record Low: -6.8°C (20°F) in Nagoya (1985)
- Record Rainfall: 130 mm (5.1 inches) in a day (1995)
- Record Snow: Up to 8 cm (3 inches) in rare lowland events.
Best and Worst Times to Visit
- Best Time to Visit: April and November are ideal due to mild temperatures, low rainfall, and seasonal beauty (cherry blossoms in April, autumn foliage in November). October is also excellent for pleasant weather and cultural events.
- Worst Time to Visit: September is the least favorable due to heavy rainfall (209 mm) and typhoon risks, which can disrupt travel plans. June and July are also challenging due to the rainy season’s humidity and frequent showers.
Additional Notes
Aichi’s climate offers diverse experiences, from vibrant spring blooms to colorful autumn leaves. Nagoya’s urban attractions, like museums and shopping districts, are year-round options, while rural areas like Korankei and Inuyama shine during specific seasons. Always check weather forecasts, especially during typhoon season (August–September), and be prepared for humidity in summer. For winter, lowland areas like Nagoya are manageable, but higher elevations require extra caution for rare snow.
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