Our verdict
The best time to visit Nagano is September-November
In summer, temperatures can reach as high as 31℃ (88℉) in the middle of the day. The weather in the winter, especially around January, can reach a minimum of -9℃ (16℉).
If you’re a sun-chaser and want to visit Nagano when the days are longest, you should visit in August. On average it rains the most days in July, making it the wettest month of the year. Although it’s the wet season, it can often rain a little bit during the day or evening but have fine weather for a majority of the day too, so don’t let this put you off.
Keep reading to find out when the best times to travel to Nagano are for whatever trip you’re planning. By the time you finish, you’ll have all the info you need, and you’ll be ready to start booking. Don’t know where to look or who to book with? Don’t stress! We’ve hand-picked our favourite online travel tools we use, know and love so you can rest assured you’re in safe hands. Happy reading!
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Nagano seasons
Before you continue, it’s important to know when the seasons are in Nagano as they might be different to yours depending on where in the world you’re travelling from. Nagano is in the Northern Hemisphere, so the seasons fall during these months:
| Season | Months |
|---|---|
| Summer | June to August |
| Autumn/fall | September to November |
| Winter | December to February |
| Spring | March to May |
Average temperatures in Nagano
If the temperature is a big factor for you to help you decide when to visit, the chart below shows the average minimum and maximum temperatures in Nagano for each month side-by-side so you can easily see the difference in weather throughout the year. To see the temperatures in both Celsius (°C) and Fahrenheit (°F), hover or tap the shaded boxes on the graph.
Nagano climate by month
If you already have a rough idea about which months you might want to travel, the section below shows a detailed breakdown of the climate in Nagano for each month so you can see if it all suits your wants and needs. Scroll down, or use the quick menu below to jump to your preferred month.
Jump to:
Nagano in January
- Average temperature: -3℃ (27℉)
- Average high temperature: 1℃ (33℉)
- Average low temperature: -6℃ (20℉)
- Average humidity: 87%
- Average sunny days: 6 days
- Average rainfall: 68mm (3") over 10 days
- Average snow days: 21 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Nagano in January, make sure you pack a thick snow/winter jacket, thermals and some extra layers as it's always very cold.
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Nagano in February
- Average temperature: -2℃ (28℉)
- Average high temperature: 2℃ (35℉)
- Average low temperature: -6℃ (21℉)
- Average humidity: 86%
- Average sunny days: 8 days
- Average rainfall: 49mm (2") over 10 days
- Average snow days: 15 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Nagano in February, make sure you pack a thick snow/winter jacket, thermals and some extra layers as it's always very cold.
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Nagano in March
- Average temperature: 2℃ (36℉)
- Average high temperature: 6℃ (44℉)
- Average low temperature: -3℃ (28℉)
- Average humidity: 80%
- Average sunny days: 9 days
- Average rainfall: 61mm (2") over 15 days
- Average snow days: 10 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Nagano in March, make sure you pack a thick snow/winter jacket, thermals and some extra layers as it's always very cold.
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Nagano in April
- Average temperature: 8℃ (46℉)
- Average high temperature: 12℃ (54℉)
- Average low temperature: 2℃ (36℉)
- Average humidity: 76%
- Average sunny days: 11 days
- Average rainfall: 57mm (2") over 15 days
- Average snow days: 2 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Nagano in April, make sure you pack a thick snow/winter jacket, thermals and some extra layers as it's always very cold.
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Nagano in May
- Average temperature: 14℃ (57℉)
- Average high temperature: 20℃ (67℉)
- Average low temperature: 8℃ (46℉)
- Average humidity: 72%
- Average sunny days: 12 days
- Average rainfall: 58mm (2") over 16 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Nagano in May, make sure you pack a warm jacket or coat.
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Nagano in June
- Average temperature: 17℃ (63℉)
- Average high temperature: 22℃ (72℉)
- Average low temperature: 12℃ (53℉)
- Average humidity: 80%
- Average sunny days: 9 days
- Average rainfall: 85mm (3") over 19 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Nagano in June, make sure you pack a coat or jumper for the evenings and some light clothes for the daytime.
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Nagano in July
- Average temperature: 21℃ (71℉)
- Average high temperature: 26℃ (79℉)
- Average low temperature: 17℃ (63℉)
- Average humidity: 83%
- Average sunny days: 5 days
- Average rainfall: 138mm (5") over 24 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Nagano in July, make sure you pack t-shirts for the daytime and maybe a light jumper for the evenings as it cools down a bit.
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Nagano in August
- Average temperature: 22℃ (72℉)
- Average high temperature: 27℃ (81℉)
- Average low temperature: 18℃ (64℉)
- Average humidity: 82%
- Average sunny days: 5 days
- Average rainfall: 108mm (4") over 24 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Nagano in August, make sure you pack t-shirts for the daytime and maybe a light jumper for the evenings as it cools down a bit.
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Nagano in September
- Average temperature: 18℃ (64℉)
- Average high temperature: 23℃ (73℉)
- Average low temperature: 13℃ (56℉)
- Average humidity: 83%
- Average sunny days: 9 days
- Average rainfall: 70mm (3") over 18 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Nagano in September, make sure you pack a light jumper or hoodie for the evenings and some light clothes for the daytime.
Nagano in October
- Average temperature: 12℃ (54℉)
- Average high temperature: 17℃ (63℉)
- Average low temperature: 8℃ (46℉)
- Average humidity: 83%
- Average sunny days: 10 days
- Average rainfall: 83mm (3") over 16 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Nagano in October, make sure you pack a warm jacket or coat.
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Nagano in November
- Average temperature: 6℃ (43℉)
- Average high temperature: 11℃ (51℉)
- Average low temperature: 2℃ (36℉)
- Average humidity: 82%
- Average sunny days: 11 days
- Average rainfall: 47mm (2") over 17 days
- Average snow days: 1 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Nagano in November, make sure you pack a thick snow/winter jacket, thermals and some extra layers as it's always very cold.
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Nagano in December
- Average temperature: 1℃ (33℉)
- Average high temperature: 4℃ (39℉)
- Average low temperature: -3℃ (27℉)
- Average humidity: 83%
- Average sunny days: 7 days
- Average rainfall: 66mm (3") over 16 days
- Average snow days: 14 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Nagano in December, make sure you pack a thick snow/winter jacket, thermals and some extra layers as it's always very cold.
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