Aichi Prefecture Free Weather Report 2025

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🇯🇵 Aichi Prefecture Weather Report – Month-by-Month Overview

❄️ January
Cool and dry. Nagoya averages 2–9°C. Snow is rare in lowland areas but possible in mountainous regions like Toyota and Shinshiro. Skies are mostly clear, with low humidity and minimal rainfall.

🌨️ February
Still chilly. Highs reach 10–12°C, with lows around 3°C. Occasional frost inland. Rainfall remains low, and sunshine hours gradually increase.

🌱 March
Spring begins. Temperatures rise to 12–17°C. Plum blossoms bloom, and rainfall increases slightly. Coastal areas warm faster, while inland valleys stay crisp.

🌸 April
Mild and vibrant. Highs reach 17–22°C. Cherry blossoms peak across the prefecture, especially in Nagoya Castle Park and Okazaki. 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, countryside travel, and outdoor festivals.

☀️ 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. Coastal towns and river retreats are popular for summer outings.

🍂 September
Transition to autumn. Temperatures ease to 25–31°C. Rain returns gradually, and typhoon activity may affect the region. Nights begin to cool.

🌦️ October
Cooler and clearer. Highs drop to 19–26°C. Rainfall decreases, and autumn foliage begins in parks and temple grounds. 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 5–12°C. Snow is rare, but mountain areas may see frost. Skies are mostly clear, and festive lights brighten city streets.

Aichi Prefecture Free Weather Report 2025

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Weather in Aichi, Japan: A Month-by-Month AnalysisAichi Prefecture, located in the Chubu region of Japan, is a vibrant area centered around the bustling city of Nagoya. Known for its industrial significance, cultural heritage, and diverse landscapes, Aichi experiences a humid subtropical climate (Köppen classification: Cfa), characterized by hot, humid summers, mild winters, and significant rainfall throughout the year. This report provides a detailed month-by-month analysis of Aichi’s weather, focusing on temperature, precipitation, humidity, and seasonal characteristics, with data drawn from reliable sources to guide residents, travelers, and planners.JanuaryJanuary is Aichi’s coldest month, marking the heart of winter. Average high temperatures in Nagoya, a key city in Aichi, hover around 7.5°C (45.5°F), while lows dip to approximately 1.0°C (33.8°F). Precipitation is minimal, with an average of 20.6 mm (0.81 inches) of rainfall across about 3.6 days, making it one of the driest months. Snow is rare but possible, with about 1 cm of snowfall across 2 days. Humidity levels are relatively low at around 69%, and northwest winds prevail at an average speed of 24.1 km/h. The weather is generally tolerable but chilly, requiring warm clothing, especially for outdoor activities. Days are shorter, with about 7.7 hours of sunshine, making indoor attractions like Nagoya’s museums a good choice.

FebruaryFebruary remains firmly in winter, with slightly warmer conditions than January. Average highs reach 8.7°C (47.7°F), and lows average 1.5°C (34.7°F). Precipitation increases to 39.2 mm (1.54 inches) over 5.6 days, with occasional snow (1 cm across 4 days). Humidity stays around 68%, and northwest winds blow at 23.6 km/h. The weather ranges from poor in some areas to tolerable in others, like Kikaijiima, where temperatures can reach 19°C. February’s cold and occasional wet days make it less ideal for outdoor exploration, but early cherry blossom events in warmer areas may start attracting visitors.

MarchMarch signals the transition to spring, with noticeable warming. Average highs climb to 12.4°C (54.3°F), and lows reach 4.4°C (39.9°F). Precipitation rises significantly to 63.1 mm (2.48 inches) across 8.6 days, reflecting the onset of Japan’s rainy season precursors. Humidity averages 69%, and northwest winds ease to 21.0 km/h. The weather in Nagoya becomes unpleasant at times, but other areas like Kikaijiima can be pleasant with highs up to 21°C. Cherry blossoms begin to bloom late in March, particularly in Nagoya, making it a picturesque time to visit despite variable weather.

AprilApril brings pleasant spring weather, ideal for tourism. Average highs in Nagoya reach 16.9°C (62.4°F), with lows at 8.8°C (47.8°F). Rainfall increases to 95.3 mm (3.75 inches) over 9.3 days, but dry days remain common (about 6 days). Humidity rises to 71%, and winds shift to a westerly direction at 20.3 km/h. The cherry blossom season peaks, drawing crowds to parks like Tsuruma in Nagoya. The pleasant temperatures and vibrant scenery make April one of the best months to visit Aichi, though rain gear is advisable.

MayMay continues the springtime appeal with warmer and more stable weather. Average highs reach 22.5°C (72.4°F), and lows are at 13.9°C (56.9°F). Precipitation is significant at 99.7 mm (3.92 inches) across 7.9 days, but dry days (around 4 days) allow ample outdoor time. Humidity increases to 71%, and southwest winds blow at 18.5 km/h. Nagoya’s weather is pleasant, with temperatures occasionally hitting 25°C, making it ideal for festivals and outdoor activities like hiking in Aichi’s hilly areas.

JuneJune marks the start of the rainy season (tsuyu), bringing wetter conditions. Average highs are 25.2°C (77.3°F), with lows at 18.0°C (64.4°F). Rainfall peaks at 120.4 mm (4.74 inches) across 12 days, with a 18.0% chance of precipitation during daylight hours. Humidity climbs to 78%, and south winds prevail at 16.8 km/h. The weather ranges from poor in Ono to tolerable in Nagoya, where temperatures can hit 28°C. Visitors should expect frequent showers and plan for indoor attractions like the Toyota Automobile Museum.

JulyJuly is a summer month with hot and humid conditions. Average highs soar to 29.1°C (84.3°F), with lows at 22.2°C (72.0°F), though Nagoya can reach 32°C. Precipitation is the highest of the year at 180.7 mm (7.11 inches) across 16.4 days, reflecting the tail end of the rainy season. Humidity peaks at 80%, and south or west winds blow at 16.1 km/h. The heat and humidity can be oppressive, so light clothing and hydration are essential. Outdoor festivals, like Nagoya’s Sumo Tournament, occur, but heatstroke precautions are critical.

AugustAugust is Aichi’s warmest month, with average highs of 31.4°C (88.4°F) and lows at 24.1°C (75.3°F), sometimes hitting 38°C. Rainfall remains high at 92.5 mm (3.64 inches) over 13.2 days, but sunny days are frequent, offering 12.7 hours of sunshine. Humidity averages 75%, and southeast winds blow at 18.1 km/h. The weather ranges from poor in Ono to tolerable in Gamagori, with Nagoya hitting 34°C. August’s bright skies are perfect for beach trips to Minamichita, but heat and humidity require careful planning.

SeptemberSeptember remains warm but begins transitioning to autumn. Average highs are 27.3°C (81.1°F), with lows at 20.5°C (68.9°F). Precipitation is significant at 120.1 mm (4.73 inches) across 11.9 days, with September being the wettest month in some areas (209 mm). Humidity averages 75%, and south winds blow at 17.1 km/h. The weather can be poor in Nagoya but tolerable in Nara, with temperatures up to 30°C. Typhoon season peaks, so travelers should monitor forecasts.

OctoberOctober offers pleasant autumn weather, ideal for sightseeing. Average highs drop to 21.7°C (71.0°F), with lows at 14.9°C (58.8°F). Rainfall decreases to 122.3 mm (4.81 inches) over 9.7 days, with 11 dry days. Humidity is 74%, and northwest winds return at 18.7 km/h. Nagoya’s weather is pleasant, making it a prime time for festivals and exploring historical sites like Inuyama Castle. Fall foliage begins to appear, enhancing Aichi’s scenic beauty.

NovemberNovember brings cooler autumn weather, with average highs of 15.8°C (60.4°F) and lows at 9.4°C (48.9°F). Precipitation drops to 44.7 mm (1.76 inches) across 6.4 days, making it the driest month. Humidity is 71%, and northwest winds blow at 19.6 km/h. The weather ranges from unpleasant in Ono to pleasant in Nagoya, with vibrant fall colors attracting visitors. Light jackets are recommended for comfortable exploration.

DecemberDecember ushers in winter, with average highs of 9.8°C (49.6°F) and lows at 3.9°C (39.0°F). Precipitation is low at 34.9 mm (1.37 inches) across 5 days, with 18 dry days. Humidity averages 71%, and northwest winds strengthen to 23.5 km/h. The weather is unpleasant in Nagoya but pleasant in Kikaijiima, with highs up to 21°C. Winter illuminations and indoor activities like visiting Nagoya Castle are popular.

ConclusionAichi’s climate is diverse, with distinct seasonal shifts. Spring (April-May) and autumn (October-November) are the best times to visit due to pleasant temperatures and vibrant scenery, though rainfall is common. Summer (June-August) is hot and humid, with significant precipitation, while winter (December-February) is cold but dry. Travelers should prepare for rain year-round, especially during the June-July rainy season and September’s typhoon risks. For precise weather data, use codes like RJGG for Chubu Centrair International Airport or AccuWeather’s ASI|JP|JA024|CHUBU for regional forecasts. This analysis, supported by historical data, equips visitors and residents to plan effectively for Aichi’s dynamic weather.

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