When summer hits Japan, the heat and humidity can make many regions feel stifling. However, Hokkaido and the mountainous areas of Honshu, such as Karuizawa and Kamikochi, stand out as the most comfortable destinations. With cooler temperatures and pleasant conditions, these spots offer a refreshing escape from the typical summer swelter.
Hokkaido’s Summer: A Cool Retreat at 26°C
In Hokkaido, Japan’s northernmost island, summer temperatures are a welcome relief. Cities like Sapporo and Asahikawa boast an average high of around 26°C (79°F), significantly cooler than most of Japan. This mild climate, paired with low humidity, makes Hokkaido an ideal spot for travelers seeking comfort. Whether you’re strolling through Sapporo’s famous lavender fields or soaking in the hot springs of Noboribetsu, you’ll enjoy a summer experience that’s both relaxing and invigorating.
Mountainous Regions: Even Cooler at 23°C
For an even cooler escape, head to Honshu’s mountainous regions. In Kamikochi, nestled at a high elevation, the average summer high is just 23°C (73°F), thanks to its 1,500-meter altitude. Similarly, Karuizawa, at 1,000 meters, averages around 28°C (82°F) but cools off significantly at night. These areas are perfect for outdoor enthusiasts, offering crisp air and stunning scenery for hiking and nature observation.
Regional Highlights: What Makes These Areas Special
Each of these cool summer destinations has unique features that enhance their appeal:
Hokkaido:
As Japan’s northern gem, Hokkaido stays breezy and dry even in summer. Beyond its climate, visitors can explore lavender fields in Furano, unwind in hot springs, or enjoy outdoor activities in cities like Asahikawa and Hakodate—all while staying cool.
Mountainous Areas:
High-altitude retreats like Karuizawa and Kamikochi offer more than just lower temperatures. Karuizawa, a historic summer getaway, is known for shopping and art, while Kamikochi’s pristine landscapes are a hiker’s paradise. At night, the chill (as low as 12°C–13°C in Kamikochi) adds a refreshing twist.
Tohoku Region:
Areas like Aomori in Tohoku hover around 27°C (81°F) in summer—slightly warmer than Hokkaido but still cooler than central Japan. Highlights include the vibrant Nebuta Festival, though humidity can occasionally creep in.
Key Considerations for Your Summer Trip
While Hokkaido and the mountains shine in summer, other parts of Japan can be less inviting:
Central Japan and Okinawa:
Cities like Tokyo, Kyoto, and Osaka, along with Okinawa, see average highs of 31°C–33°C (88°F–91°F) with sticky humidity. These conditions can feel oppressive, especially for outdoor exploration.
Nighttime in the Mountains:
High-altitude areas cool down significantly after sunset (e.g., Kamikochi’s lows of 12°C–13°C). Pack a light jacket or sweater to stay comfortable.
Why These Regions Stand Out in Japan’s Summer Season
Japan’s summer, spanning June to August, often brings high temperatures and humidity across the country. Yet, Hokkaido and mountainous regions buck this trend with their cooler climates. Based on data from sources like japan-guide.com and weather-and-climate.com, here’s a snapshot of average highs and lows in July and August:
|
Region/City
|
July High (°C)
|
July Low (°C)
|
August High (°C)
|
August Low (°C)
|
|---|---|---|---|---|
|
Sapporo (Hokkaido)
|
25
|
17
|
26
|
19
|
|
Aomori (Tohoku)
|
27
|
19
|
27
|
21
|
|
Karuizawa (Mountains)
|
27
|
17
|
28
|
18
|
|
Kamikochi (Mountains)
|
23
|
12
|
23
|
13
|
|
Tokyo (Central)
|
29
|
23
|
31
|
24
|
|
Osaka (Central)
|
31
|
24
|
33
|
25
|
|
Naha (Okinawa)
|
31
|
26
|
31
|
26
|
Plan Your Cool Summer Getaway to Japan
If you’re dreaming of a summer trip to Japan without the heat, Hokkaido and its mountainous counterparts are your best bets. From Sapporo’s mild days to Kamikochi’s crisp mountain air, these destinations deliver a refreshing break from the norm. Pack light layers, plan some nature adventures, and enjoy Japan’s coolest summer spots!
