Yokohama sits on the Pacific coast of Honshu, 30 km south of Tokyo, and shares the same humid subtropical climate (Köppen Cfa). The city gets 1,730 mm of rain annually, about the same as Tokyo. Summers are hot and sticky with the rainy season (tsuyu) from mid-June to late July, and typhoons between August and October account for the wettest months. Winters are mild and dry with occasional sunny days reaching 10-12°C. Here’s the month-by-month breakdown with actual numbers. See our best time to visit guide for more details.
Yokohama Weather by Month: January
January is Yokohama’s coldest month with an average high of 10°C (50°F) and a low of 2°C (36°F). You’ll get about 6 hours of sunshine per day and only 65 mm of rain across 6 wet days. Humidity averages 55%, so the cold feels dry rather than penetrating. Frost is possible on clear nights but snow is rare, Yokohama sees measurable snow maybe once every 3-4 years. The sea temperature drops to 16°C (61°F). Pack a medium-weight coat, layers, and a scarf for evening walks along the waterfront. See our things to do guide for more details.
Yokohama Weather by Month: February
February is nearly identical to January: average high 10°C (50°F), low 3°C (37°F), and 70 mm of rain across 7 wet days. Sunshine increases slightly to 6.5 hours per day. The plum blossoms at Sankeien Garden start opening in mid-February, the first sign of spring. Sea temperature is at its annual minimum of 14°C (57°F). Dress the same as January. Hotel rates are low outside of Chinese New Year when Yokohama Chinatown gets busy. See our events and festivals calendar for more details.
Yokohama Weather by Month: March
March brings noticeable warming: average high 13°C (55°F), low 6°C (43°F). Rainfall jumps to 120 mm across 12 wet days as spring rains begin. Cherry blossoms (sakura) typically bloom from March 25 to April 5 in Yokohama, drawing crowds to Sankeien Garden, Negishi Forest Park, and the Yamashita Park waterfront. Daytime temperatures are comfortable for walking but evenings still need a jacket. Sunshine averages 6 hours per day. This is one of the most popular times to visit. See our neighborhoods guide for more details.
Yokohama Weather by Month: April
April is mild and pleasant: average high 18°C (64°F), low 11°C (52°F). Rain totals 135 mm across 11 wet days. Sunshine increases to 7 hours per day. Cherry blossoms give way to fresh greenery by mid-April. This is peak tourist season, book hotels 2-3 months ahead. Daytime is t-shirt weather, but bring a light jacket for evenings on the Minato Mirai waterfront. Sea temperature rises to 17°C (63°F). See our where to stay guide for more details.
Yokohama Weather by Month: May
May is one of the best months to visit: average high 22°C (72°F), low 15°C (59°F), and 140 mm of rain across 12 days. Humidity is still moderate at 65%. Sunshine averages 7.5 hours. The Golden Week holiday (April 29 to May 5) brings domestic crowds and higher hotel prices, avoid these dates if possible. After Golden Week, crowds thin and the weather is near-perfect for walking the Yamate Bluff, strolling Yamashita Park, or cycling around the port area. See our travel tips and FAQ for more details.
Yokohama Weather by Month: June
June marks the start of tsuyu (rainy season): average high 25°C (77°F), low 19°C (66°F), and 190 mm of rain across 14 days. Humidity climbs to 78% and it rains roughly every other day, usually as steady drizzle rather than downpours. Sunshine drops to 5 hours per day. You’ll need an umbrella and waterproof shoes. The upside: temples and gardens are lush green, indoor attractions like the Cup Noodles Museum and Shin-Yokohama Ramen Museum are unaffected, and hotel rates drop to some of the lowest of the year.
Yokohama Weather by Month: July
Tsuyu ends by mid-July and the heat kicks in: average high 29°C (84°F), low 23°C (73°F), and 160 mm of rain across 12 days. Humidity stays high at 80%, making it feel several degrees hotter. Sea temperature rises to 23°C (73°F) , warm enough for swimming at Yamashita Park Beach (though most locals head to nearby Zushi or Hayama beaches). Sunshine returns to 6.5 hours. The Yokohama Sparkling Twilight fireworks display runs on July 17, and the Kanagawa Shimbun Fireworks Festival draws 200,000 spectators.
Yokohama Weather by Month: August
August is the hottest month: average high 31°C (88°F), low 24°C (75°F), with 170 mm of rain across 11 days. Humidity peaks at 82% and the heat index can reach 38°C (100°F). Sea temperature hits 27°C (81°F). Typhoon season begins in earnest , expect 1-2 typhoon-related disruptions with heavy rain and wind. The Pikachu Outbreak event fills Minato Mirai with Pokemon parades and light shows in early August. Stay hydrated, carry a small towel, and duck into air-conditioned shopping malls like Queen’s Square and Landmark Plaza during midday heat.
Yokohama Weather by Month: September
September is the wettest month of the year: 240 mm of rain across 14 days as typhoon activity peaks. Average high drops to 27°C (81°F), low 21°C (70°F), but humidity remains high at 78%. Two to three typhoons typically pass near or over Yokohama in September, bringing torrential rain and transport disruptions. Between typhoons you’ll get clear, hot days. The Yokohama Oktoberfest at the Red Brick Warehouse runs late September to early October. Pack a sturdy umbrella and check JR East train status before heading out.
Yokohama Weather by Month: October
October is one of the best months: average high 22°C (72°F), low 15°C (59°F), and 210 mm of rain across 12 days. The first half still sees typhoon risk; the second half delivers crisp autumn weather with 5.5 hours of sunshine. Humidity drops to 68%. The Yokohama Jazz Promenade and Yokohama Oktoberfest draw big crowds. Sea temperature is still 22°C (72°F). This is ideal weather for walking the Kishamichi Promenade and exploring the Yamate district’s autumn foliage.
Yokohama Weather by Month: November
November is autumn at its best: average high 17°C (63°F), low 10°C (50°F), and only 100 mm of rain across 8 days. Sunshine averages 6 hours. The autumn foliage peaks in mid-to-late November , Sankeien Garden and Mitsuike Park put on stunning displays. Humidity drops to a comfortable 60%. This is the dry season and one of the most pleasant months for outdoor sightseeing. A light jacket is all you need during the day. Hotel prices remain moderate between the autumn rush and year-end holidays.
Yokohama Weather by Month: December
December brings winter back: average high 12°C (54°F), low 5°C (41°F), and only 65 mm of rain across 6 days. It’s the driest month with 6.5 hours of sunshine. Humidity drops to 52%. The Minato Mirai area lights up with winter illuminations, and Yokohama’s Christmas Market at the Red Brick Warehouse runs from late November through December 25. Sea temperature is 18°C (64°F). New Year’s Eve at Yokohama’s waterfront draws crowds for the countdown. Pack warm layers and expect clear, crisp days.
| Month | High (°C/°F) | Low (°C/°F) | Rain (mm) | Sun (hrs) | Sea (°C) |
|---|---|---|---|---|---|
| Jan | 10/50 | 2/36 | 65 | 6.0 | 16 |
| Feb | 10/50 | 3/37 | 70 | 6.5 | 14 |
| Mar | 13/55 | 6/43 | 120 | 6.0 | 15 |
| Apr | 18/64 | 11/52 | 135 | 7.0 | 17 |
| May | 22/72 | 15/59 | 140 | 7.5 | 19 |
| Jun | 25/77 | 19/66 | 190 | 5.0 | 22 |
| Jul | 29/84 | 23/73 | 160 | 6.5 | 25 |
| Aug | 31/88 | 24/75 | 170 | 7.0 | 27 |
| Sep | 27/81 | 21/70 | 240 | 5.0 | 25 |
| Oct | 22/72 | 15/59 | 210 | 5.5 | 22 |
| Nov | 17/63 | 10/50 | 100 | 6.0 | 20 |
| Dec | 12/54 | 5/41 | 65 | 6.5 | 18 |
