Weather Underground provides local & long-range weather forecasts, weather reports, maps & tropical weather conditions for locations worldwide The China Weather Map below shows the weather forecast for the next 10 days. Note that seasonal normals in contrast with those observed in Sapporo (Hokkaido) in march with a maximum record of 63°F in 2015 and a minimum record of -0°F in 2011. Use the near real-time water temperature data with discretion, because they may contain errors. Animated hourly and daily weather forecasts on map But this is reasonably and you will not be too bothered by it. The climate is rather cool in this city in this month, but it is liveable by dressing warm. With 4.6in over 11 days, rainfall can happen throughout your stay. In april, the mean temperature in Tokyo is 61°F (maximum temperature is 67°F and minimum temperature is 56°F).

Japan.

General Information on Climate of Japan Japan has four distinct seasons with a climate ranging from subarctic in the north to subtropical in the south. Sea water temperature in some cities of Japan is above 20°C/68°F and it is enough for comfortable bathing. Conditions are different between the Pacific side and the Sea of Japan side. Thus, the mean temperature average on this month of march in Sapporo (Hokkaido) is 31°F. The 5 main islands are Hokkaido, Honshu, Kyushu, Shikoku and Okinawa.There are 6,847 'remote islands'.
Average temperature, rainfall and snowfall information is available for the following climate stations in Japan

Japan is an island country comprising a stratovolcanic archipelago over 3,000 km (1,900 mi) along East Asia's Pacific coast. The territory extends 377,975.24 km 2 (145,937.06 sq mi). The Office of Satellite and Product Operations (OSPO) is part of the National Environmental Satellite Data and Information Service (NESDIS). NESDIS is part of the National Oceanic and Atmospheric Administration (NOAA), and the Department of Commerce. Water Temperature Table of the Northern Atlantic Coast (Google Maps-based Web page) Last Updated: Tue Jun 16, 05:02:45 UTC 2020 Location Recent Temperatures JUN 1-15 JUN 16-30 JUL 1-15 JUL 16-31 AUG 1-15 AUG 16-31 SEP 1-15 SEP It consists of 6,852 islands. Temperature in Japan decreased to 4.06 celsius in December from 9.28 celsius in November of 2015. Temperature in Japan averaged 11.95 celsius from 1841 until 2015, reaching an all time high of 26.64 celsius in August of 2010 and a record low of -2.26 celsius in January of 1922. Current weather in Tokyo and forecast for today, tomorrow, and next 14 days
On average, the recorded minimum temperature is 25°F.