Overall, the rainiest areas, where annual precipitation exceeds 2, millimeters 80 inches , are the central-western part of the island of Honshu where precipitation is abundant even in winter because of the north-west monsoon , the Kii Peninsula where the summer monsoon is actually more pronounced , also the inland and southern areas of Shikoku and the central-southern part of Kyushu which are affected by the summer monsoon as well.
The least rainy area is the northernmost part of Hokkaido, where precipitation drops below 1, mm 40 in per year, both because of the cold winter and the reduced influence of the summer monsoon. Summer , which begins in mid-June, is hot and muggy in much of the country, except in Hokkaido and the northern part of Honshu, where the temperatures are typically more pleasant. August is the hottest month on the main islands, while on the small southern islands there is no difference between July and August.
Owing to both the high humidity and the so called "urban heat island" effect, the heat is hardly bearable in Tokyo, Osaka and in the big cities of southern Honshu and Kyushu. In most of Japan, summer is the rainiest season of the year. There are two rainiest periods. The average hourly wind speed in Tokyo experiences mild seasonal variation over the course of the year. The windier part of the year lasts for 4. The windiest month of the year in Tokyo is March , with an average hourly wind speed of 9.
The calmer time of year lasts for 7. The calmest month of the year in Tokyo is July , with an average hourly wind speed of 7. The wind is most often from the south for 4. The wind is most often from the east for 2. The wind is most often from the north for 7. Tokyo is located near a large body of water e. This section reports on the wide-area average surface temperature of that water. The average water temperature experiences significant seasonal variation over the course of the year.
The time of year with warmer water lasts for 2. The time of year with cooler water lasts for 4. To characterize how pleasant the weather is in Tokyo throughout the year, we compute two travel scores.
Based on this score, the best times of year to visit Tokyo for general outdoor tourist activities are from mid May to mid June and from early September to late October , with a peak score in the first week of October. Based on this score, the best time of year to visit Tokyo for hot-weather activities is from late July to early September , with a peak score in the third week of August.
For each hour between AM and PM of each day in the analysis period to , independent scores are computed for perceived temperature, cloud cover, and total precipitation.
Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed. Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.
Our precipitation score , which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0. The growing season in Tokyo typically lasts for 11 months days , from around February 12 to around December 30 , rarely starting after March 5 , or ending before December Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature.
Based on growing degree days alone, the first spring blooms in Tokyo should appear around March 24 , only rarely appearing before March 11 or after April 6. This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents.
Shortwave radiation includes visible light and ultraviolet radiation. The average daily incident shortwave solar energy experiences significant seasonal variation over the course of the year. The brighter period of the year lasts for 4. The brightest month of the year in Tokyo is May , with an average of 5. The darker period of the year lasts for 3.
The darkest month of the year in Tokyo is December , with an average of 2. For the purposes of this report, the geographical coordinates of Tokyo are The topography within 2 miles of Tokyo contains only modest variations in elevation, with a maximum elevation change of feet and an average elevation above sea level of feet.
Within 10 miles also contains only modest variations in elevation feet. Lightweight, breathable fabrics should make up the bulk of your suitcase. Summer's extreme temperatures start to fade in September, giving way to cooler temperatures and breezy weather. By the end of fall, temperatures typically range from 45 to 50 degrees Fahrenheit 8 to 10 degrees Celsius throughout most the country.
Fall is mostly dry. It's also a favorite season for concerts, sporting events, and other exhibitions. What to Pack: Fall is generally quite pleasant—not too hot, not too cold. While there will still be warmer days, cooler temperatures make it appropriate to wear sweaters, light layers, and pants. Like any time of year, good walking shoes are still crucial. Winter in Japan is dry and sunny, with temperatures that rarely drop below freezing—except for the country's northern reaches of Sapporo and the like.
Snowfall occurs the further north you go, with central Japan receiving light dustings as well. Winter in Southern Japan is mild. What to Pack: Japan can have freezing winters, depending on where you visit, which means winter staples like a heavy coat, a scarf, gloves, and hat, are all must-packs. If you're visiting the northern region of the country, where several feet of snow is common, make sure to pack sturdy, waterproof boots or shoes. According to the Japan Meteorological Agency, there are more than active volcanoes in Japan.
Please be aware of volcanic warnings and restrictions when you visit any volcanic areas in Japan. While Japan is a great country to visit during any time of the year, you should take precautions to stay safe if you plan to visit the country during a time when perilous weather is common. Actively scan device characteristics for identification.
Use precise geolocation data. Select personalised content. Create a personalised content profile. Measure ad performance. Select basic ads. Hokkaido is an attractive destination in June as it is least affected by the rainy season. Also, the weather in Okinawa takes a dramatic turn to the better after the end of the rainy season there in late June.
The rainy season tsuyu typically ends in the first half of July. It is hot and humid in most of Japan, and just standing outdoors can make you sweat. The conditions are more comfortable in higher elevations and in Hokkaido , a highly popular destination among outdoor lovers during the summer months. Many local festivals and fireworks are held. Mount Fuji is opened for climbing. Cormorant fishing can be observed.
It is also a very good time of the year for beach holidays in Okinawa. With the summer school holidays from late July through August, domestic travel activity increases considerably. August is hot and humid in most of Japan. Many local festivals and fireworks are held in August. Travel activity is high during the entire month due to summer school holidays, but is especially intensive during the Obon week in mid August. The typhoon season reaches its peak in August and September.
Typhoons usually hit the coasts of Okinawa , Kyushu and Shikoku and cause strong rain and wind in wide parts or all of Japan for about two days.
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