Yokohama weather in August
August in Yokohama: sweltering, rainy, with muggy air — a gamble, with 37°C afternoons.
Updated September 2026 · climate normals from ERA5 reanalysis
#11 of 12 months in Yokohama · #1057 of 1413 destinations to visit in August · comfort 62/100 (tier C)
- Days
- 32°C
- Nights
- 25°C
- Wet days
- 13
- Sun
- 10 h
- Humidity
- 85%
- Daylight
- 14 h

Traveller notes on Yokohama in August
Notes from nearby Tokyo (29 km away)
Yokohama doesn't have its own notes for August yet — these are about Tokyo, close enough to share the season.
Tokyo-forum threads asking if August really is that hot get a consistent yes, posters comparing the combination of heat and humidity to Houston or Dallas at their peak, occasionally worse. A long, steady multi-day soak is called rare unless a typhoon happens to track nearby - the more typical pattern is a sudden, heavy afternoon squall once the air turns oppressively muggy, clearing within an hour or so. The Obon holiday falls mid-month, when many businesses close and inter-city trains get noticeably more crowded. Regulars recommend planning around the worst midday heat - museums, department stores and shaded shrine grounds over long outdoor stretches - and treating frequent convenience-store stops for cold drinks as a genuine survival strategy. The record: 32.1C days feeling like a punishing 37C, 24.6C nights, 116mm across 11.6 days, an 28.8C sea, 80 percent humidity and 9.9 hours of sun.
Other months in Yokohama
Forum posters consistently describe November as one of the driest months in Japan, making it excellent for sightseeing and walking around Yokohama - one visitor reported temperatures starting in the 20sC early in the month and dropping into the teens by month's end, with just a handful of drizzly days and nothing torrential across the whole stretch. Posters comparing October and November describe November as slightly cooler but drier, with the added draw of autumn foliage coming into its own. Posters generally recommend layering for the temperature drop as the month progresses, since a trip spanning early to late November can feel like two different seasons. Posters generally rate November as one of the best overall months to visit Yokohama.
Japan-forum regulars call May one of the best windows to visit the greater Tokyo/Yokohama area - it's before the rainy season, which typically doesn't arrive until around June 7-10. The catch is that May itself is changeable: posters describe stretches of 3 sunny days followed by a day or two of rain, and by late May it can turn briefly hot and humid before settling back down. The standard advice is to pack for everything - short sleeves, a long-sleeve layer, a light jacket and a compact rain parka. For Yokohama itself, the Minato Mirai waterfront and Sankeien Garden are the most-recommended stops, and it's called worth a full day beyond a quick side trip from Tokyo.
Add your own note from Yokohama's card on the map.
Yokohama climate normals — August
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Yokohama in August
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
BusySummer break (natsuyasumi) in Japan, school holidays in 3 of the markets that fill it(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Yokohama's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Toughest weatherYokohama's best weather comes in April, May and November — separate windows, not one continuous season.
August coincides with Typhoon season.
Best weatherFair weatherToughest weather
What's on in Yokohama in August
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Hazard
Typhoon season
1 Aug – 30 Sep · usuallyClosuresThe bay is exposed and the waterfront is the part that shuts — the piers, the ferris wheel and the harbour cruises go before the trains do. Source ↗
Nearby, and something's on
Within 300 km of Yokohama — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Yokohama?
Yokohama in August — FAQ
- Is August a good time to visit Yokohama?
- August in Yokohama: sweltering, rainy, with muggy air — a gamble, with 37°C afternoons. It ranks #11 of 12 months for Yokohama on SeasonMap's comfort score (62/100).
- What is the weather like in Yokohama in August?
- In August, Yokohama averages a daily high of 32.3°C and a low of 25.3°C, with about 116.8 mm of rain over roughly 12.6 rainy days.
- What is the air quality in Yokohama in August?
- Yokohama has a mean US Air Quality Index of about 63 in August.
Within 300 km: Fujikawaguchiko's Mount Fuji climbing season on 1 Jul – 10 Sep, and Matsumoto's Kamikochi open season around 17 Apr – 15 Nov.