The best time to see the snow monkeys
Snow monkeys get into the water for one reason, and the reason is cold. From roughly December to March the troop at Jigokudani soaks most days, while in the warm months it sits beside the pool and seldom gets in. This guide walks through the year season by season, then covers the time of day, how snow affects the coach and how far ahead to book.
Four seasons at one pool
The troop at Jigokudani Yaen-koen comes down to the valley floor most days of the year because park staff put out food for it. What the calendar changes is whether the monkeys get into the water. Japanese macaques bathe to keep warm, so the famous pictures of red faces in rising steam belong to the cold months. In warm weather the troop sits around the pool, grooms and plays, and rarely gets wet. No operator promises a sighting, and none promises a bath, in any month.
| Months | Snow on the trail | Monkeys in the pool | Crowds | Daytime highs |
|---|---|---|---|---|
| December to March | Deep, icy underfoot | Most days | Busiest, holidays sell out | 32–37 °F (0–3 °C) |
| April to June | Gone by mid-April, mud in the thaw | Rarely | Golden Week in early May | Mild |
| July to September | None | Rarely, the troop may sit higher up | Steady | About 82 °F (28 °C) |
| October and November | Rare until the cold sets in | More likely as nights cool | Quiet | Cooling fast |
December to March, the bathing months
This is the season the park is known for. Daytime highs sit around 32–37 °F (0–3 °C), nights fall to about 14–23 °F (-10 to -5 °C), and the valley holds deep snow. The monkeys spend long spells in the pool on most days, which is when the photographs everyone has seen get taken. Even now nothing is promised; on a mild afternoon the troop may stay on the rocks.
It is also the busiest season. The New Year holidays and the weeks around them fill the coaches and the private cars, so book weeks ahead for holiday dates. The H.I.S. coach, from ~$150, adds a stop at the Kamakura snow huts, a field of illuminated snow domes, from late January to the end of February, with entry included. Snowfall and road closures can slow the coach on the expressway, and recent reviewers describe 4–5 hours for the drive back in traffic. The trail is icy all winter, so read what to wear and bring before you pack; cleats are sold on the H.I.S. bus.
From mid-March on, H.I.S. says bathing depends on the weather. A reviewer on that coach still saw monkeys in the water at the end of March, so late winter is not a lost cause, only less certain.
Winter by coach, snow huts included
From late January through February the H.I.S. day trip pairs about 2 hours at the park with the illuminated snow huts of Kamakura no Sato, plus a sukiyaki lunch and a live guide, from ~$150. Cancel free until 24 hours before, and pay later on either site.
April to June, blossom and babies
Snow leaves the trail by about mid-April, and for a few weeks the path is mud instead. Cherry blossom reaches Nagano city in mid-to-late April; a reviewer on a private car found the trees in flower at the Matsushiro castle ruins in April. The pool is quiet in those weeks. The troop is usually around it, especially at feeding times, but it seldom goes in once the air warms.
The reward is the nursery. Babies arrive from about late April to June, and the sight of mothers carrying newborns across the rocks draws visitors who never cared about steam. Our guide to the macaques covers what to watch for. Golden Week, the string of holidays in early May, brings crowds to Nagano and to the expressway, so skip it or start early. A reviewer on a private car in late May saw plenty of monkeys with no snow on the ground and advised leaving Tokyo early, while it was still cool. The per-person private car, from ~$127, can do that; the coaches cannot.
July to September, green and hot
Summer highs in the valley reach about 82 °F (28 °C). The forest is deep green and the trail is dry. The monkeys do not need the pool and may spend part of the day higher up the slopes, so a visit can mean a smaller group near the water. A reviewer with a private driver in mid-August saw monkeys with no snow, and one on a long private tour in September called it the wrong season for them. Both are true at once. You will probably see macaques; you will almost certainly not see them bathe.
Summer has its own packing list, with a rain jacket, bug spray, water and a sun hat replacing the cleats. If the season is fixed and the pool is not the point, the stops in Nagano carry more of the day, since Zenko-ji and Obuse are as good in July as in January and the park is a shorter visit.
October and November, foliage and quiet
Autumn colors reach the valley in late October and November, the crowds thin and the nights turn cold again. The park switches to winter hours, roughly 9 am to 4 pm, from November, which shortens the afternoon for any tour that arrives late. The monkeys tend to use the pool more as the cold returns, though the deep-snow scenes wait for December. This is a good season for a private car that can get you there early and add a temple on the way back.
Time of day
Every tour from Tokyo reaches the park late morning to early afternoon. The H.I.S. coach spends about 3.5 hours on the road and an hour at lunch first; the JTB Shinkansen tour, from ~$293, meets at Nagano Station just before 10 am and visits Zenko-ji before driving up to the valley. By then the first visitors have been and gone. Private cars are the exception. Luxurious Travel Master's car, from ~$535 per group, and the per-person car above can leave your hotel at 6 or 7 am and reach the trailhead before the coaches, which a reviewer recommended in warm weather. In winter the opening hour matters less than the light, which goes early in a narrow valley.
Booking lead and the Nagano-start option
Viator's own figure for the JTB tour is an average lead of about 49 days, and winter weekends on the coach go early too. The four main tours all allow a free cancellation a day ahead and a booking without payment, which makes a provisional date free to keep until the forecast settles. What each tour costs sets the four side by side, and snow monkeys with kids explains why families lean toward spring.
Travelers who ride the Shinkansen themselves have two more choices that start in Nagano. The Zenko-ji, snow monkey and sake day tour, from ~$142, runs about 8 hours and has over a thousand reviews; Yadoroku's park, Shibu Onsen and soba lunch tour, from ~$130, takes 6–7 hours with admission and lunch included. The catch with both is the start point, since you book your own train and must be in Nagano on time. Doing it without a tour covers the trains, and the three ways from Tokyo compares them with the coach.