Japan Yokohama Weather in August — Climate Guide
August in Yokohama is fair
Yokohama Weather in August — Quick Answer
As of 2026- Avg temp
- 30° / 24°
- Rainfall
- 140mm · 8 days
- Crowds
- Very busy
As of 2026, Yokohama in August averages a high of 30°C and low of 24°C with 140mm of rain over about 8 days. Year's hottest month + UV 10 — daytime 30-33°C, humidity 75%, felt temperature 35°C+. Quick-dry short-sleeves, shorts, dresses, SPF 50, sunglasses, hat, handheld fan, water bottle, light cardigan for ferocious AC. Outdoor stamina drops to 1-2 hours per session. Half the itinerary needs to live indoors.
August is fair for Yokohama.
August brings Yokohama's most extreme weather and its most expensive travel week. Daytime 30°C, 75% humidity, felt temperature 35°C+ — and Obon (August 13-16) shuts down the country for domestic travel, sending shinkansen, flights, and hotel rates into emergency mode.
August signatures: Yokohama Fireworks Festival (early August, over Minato Mirai harbor), Chinatown's summer night market (year-round Chinatown at its most vibrant), late-evening walks at Yamashita Park, after-dark Cosmo World, and the Shin-Yokohama Ramen Museum's air-conditioned refuge. The smart pattern is outdoor activity in early morning (8-11) and after sunset (after 18:00), with midday parked in malls, museums, or hotel pools.
Travel score
Year's hottest month + Obon — skip the week if you can
August Weather at a Glance
August averages 86°F / 30°C highs and 75°F / 24°C lows — Yokohama's hottest. Sea breeze keeps Minato Mirai 1-2°C cooler than inland Tokyo but felt temperature still hits 35°C+. 140mm rainfall is less than July, but late-month typhoons appear. UV index 10. Sunrise 4:55 AM, sunset 6:30 PM.
August Travel Advice
Obon (August 13-16) is Japan's annual travel crush — avoid both arrival and departure within that window. Heat exhaustion is real: 1-2 hour outdoor stretches max + constant hydration + handheld fan. Zushi and Kamakura beaches peak in August but late-month typhoons can disrupt — keep day-trip plans flexible.
Flying In from Overseas
Obon overlaps with the back half of Western summer holidays — regional + global demand stacks. Flights from Seoul (2.5h) $500-1,000 Obon week, $400-700 other weeks. Singapore $600-1,000, Sydney $700-1,200, San Francisco $1,200-1,800, London $1,200-1,800. August 6-12 and August 17-24 are the workable windows.
August Pricing Trends
Business hotels $60-100/night non-Obon, $130-220/night Obon. 4-star Minato Mirai $190-310/night non-Obon, $400+/night Obon. USD 1 ≈ JPY 148.
Yokohama August Weather Stats
Avg High
30°C
Avg Low
24°C
Rainy Days
8
140mm total
Sunshine
6h
Daily avg
Humidity
75%
humid
UV Index
10
Very high
Wind
9 km/h
Gusts 25
Sea Temp
26°C
swimming season peak
Crowds
Very busy
At attractions
August Sunrise & Sunset
Air Quality
PM2.5
25 μg/m³
PM10
42 μg/m³
Status
moderate
Feels-Like Temperature & Wind
Feels like
Daytime
35°C
Nighttime
26°C
Humidity and wind affect how the actual temperature feels.
Wind
9 km/h
Max gust 25 km/h
Activities Recommended for August
August Travel Pros & Cons
Pros
- Yokohama Fireworks Festival (early August)
- Chinatown summer night market at peak energy
- Zushi + Kamakura beaches at peak swim season
Cons
- Year's most extreme heat — felt temperature 35°C+
- Obon (August 13-16) — 2-3x pricing on flights and hotels
- Late-August typhoon season starts
August Events & Festivals
- Obon (August 13-16) — Japan's biggest domestic travel week
- Yokohama Fireworks Festival (early August)
- Chinatown summer night market (August)
- Late-August typhoon season begins
Yokohama in August — Full Picture
August brings Yokohama's most extreme weather and its most expensive travel week. Daytime 30°C, 75% humidity, felt temperature 35°C+ — and Obon (August 13-16) shuts down the country for domestic travel, sending shinkansen, flights, and hotel rates into emergency mode.
August signatures: Yokohama Fireworks Festival (early August, over Minato Mirai harbor), Chinatown's summer night market (year-round Chinatown at its most vibrant), late-evening walks at Yamashita Park, after-dark Cosmo World, and the Shin-Yokohama Ramen Museum's air-conditioned refuge. The smart pattern is outdoor activity in early morning (8-11) and after sunset (after 18:00), with midday parked in malls, museums, or hotel pools.
Obon (August 13-16) is the trap — international travelers unaware of the holiday walk into 2-3x pricing for flights and hotels. The August 6-12 and August 17-24 windows are the workable value zones. Late August adds typhoon risk that can shut down Haneda direct flights for 24-48 hours. Travel insurance with cancellation coverage matters this month.
For swimmers: Zushi and Kamakura beaches (1 hour from Yokohama Station) hit peak season — best month for day-trip swimming if heat tolerance is high.
What to Wear & What to Pack
Year's hottest month + UV 10 — daytime 30-33°C, humidity 75%, felt temperature 35°C+. Quick-dry short-sleeves, shorts, dresses, SPF 50, sunglasses, hat, handheld fan, water bottle, light cardigan for ferocious AC. Outdoor stamina drops to 1-2 hours per session. Half the itinerary needs to live indoors.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
18.7°C
10°C
10.3/mo
Summer (Jun·Jul·Aug)
Current28°C
22°C
10.3/mo
Autumn (Sep·Oct·Nov)
22°C
15.7°C
9.3/mo
Winter (Dec·Jan·Feb)
11°C
3.3°C
5.3/mo
Yokohama Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| 10° | 2° | 5d·55mm | 6h | 53% | 2 | Quiet | Low season | |
| 11° | 3° | 6d·60mm | 6h | 55% | 3 | Quiet | Low season | |
| March (Best) | 14° | 5° | 10d·115mm | 6h | 58% | 5 | Very busy | Peak |
| April (Best) | 19° | 10° | 11d·125mm | 6h | 62% | 6 | Very busy | Peak |
| May (Best) | 23° | 15° | 10d·138mm | 6h | 67% | 7 | Busy | Shoulder |
| 25° | 19° | 12d·175mm | 4h | 75% | 8 | Quiet | Low season | |
| 29° | 23° | 11d·155mm | 5h | 78% | 10 | Busy | Peak | |
| 30° | 24° | 8d·140mm | 6h | 75% | 10 | Very busy | Peak | |
| 27° | 21° | 11d·230mm | 4h | 76% | 7 | Moderate | Shoulder | |
| 22° | 16° | 10d·235mm | 5h | 72% | 5 | Busy | Peak | |
| November (Best) | 17° | 10° | 7d·100mm | 5h | 65% | 3 | Very busy | Peak |
| December (Best) | 12° | 5° | 5d·65mm | 6h | 56% | 2 | Very busy | Peak |
View Other Months
Yokohama August Hotel Picks
Frequently Asked Questions
Is August a good time to visit Yokohama?
Yokohama in August is fair. Tourist crowds are very busy and flight/hotel prices are peak.
What's the average temperature in Yokohama in August?
Yokohama August averages a high of 30°C and a low of 24°C.
Does it rain much in Yokohama in August?
Yokohama August averages 140mm of rainfall over about 8 rainy days.
What should I wear in Yokohama in August?
Year's hottest month + UV 10 — daytime 30-33°C, humidity 75%, felt temperature 35°C+. Quick-dry short-sleeves, shorts, dresses, SPF 50, sunglasses, hat, handheld fan, water bottle, light cardigan for ferocious AC. Outdoor stamina drops to 1-2 hours per session. Half the itinerary needs to live indoors.
What time are sunrise and sunset in Yokohama in August?
Yokohama August sunrise is 04:55 and sunset is 18:30, with 13h 35min of daylight.
What's the air quality like in Yokohama in August?
Yokohama August air quality (AQI) averages 52, rated Moderate. PM2.5 averages 25μg/m³.
What activities are recommended in Yokohama in August?
In August, Yokohama is great for Yokohama Fireworks Festival, Chinatown night market, Zushi / Kamakura beach day trip.
Is August peak season in Yokohama?
Yokohama August crowds are very busy and prices are peak. Advance reservations are strongly recommended.
Best Months to Visit Yokohama
View Other Months
Planning a August trip to Yokohama?
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Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.