AUGUST AT JIGOKUDANI · QUIET · 10TH OF TWELVE
The hottest month, and the same empty water
August adds Japanese holiday traffic to July’s conditions. The monkeys are still there; the scene the park is famous for is not.
25.4 °C is the 1991–2020 mean for Nagano city at 418 m. The park is at 850 m and runs two to three degrees colder, so read it as about 22.4 to 23.4 °C. No snow falls in an average August in the city.

The April–October timetable. The same.
The ticket, in detail湯THE GUIDED DAY, YEAR-ROUND$136 (≈¥21,200)PER PERSON · $273 (≈¥42,600) FOR ONE · ¥800 (≈$5.1) AT THE GATEOne price in all twelve months. What changes is what is at the end of it.
Live dates in AugustWhat the calendar does to August
QUIETEverything on this list is published by the park or by Nagaden and changes on a date. The same.
What the monkeys are doing in August
August is July with more people on the trail. The quiet part of the year. The air is warm enough on its own, so the pool is mostly empty — wardens sometimes throw food in to bring the troop down at all, and the ones that get in are mostly the young, playing.
In the warm months the monkeys are rarely in the pool — the air is warm enough on its own; wardens sometimes throw food into the water to encourage them in, and the ones that do get in are mostly the young, playing.
The park publishes a predicted time for the monkeys coming down from the mountain and asks visitors to check before traveling and again on the day, through its live cameras and social accounts — which is the only thing that answers «will they be there today», and it is free.
A tour cannot beat the August traffic
Read before bookingThe roads and the trains fill for the Japanese holidays. A coach sits in the same queue as a car.
NOTHING ON SALE CHANGES THIS Park staff work to attract the monkeys during opening hours, but the monkeys may not show up at all on certain days; appearances are particularly sporadic in autumn. Seven of the 21 tours on this site include the ¥800 (≈$5.1) gate fee in the price and the rest leave it at the gate; not one of them includes a monkey.
LIVE DATES · AUGUST · FROM NAGANO · ¥800 (≈$5.1) AT THE GATE
August, priced and dated
8:30–17:00 at the gate, 7 a day, reportedly on the express bus, and the same. Everything else about the day is the same in every month, and is priced on the pages below.
OR JULY INSTEAD · SEPTEMBER INSTEAD · SUMMER AS A WHOLE · ALL TWELVE COMPARED