Nagano Temperatures: Monthly Averages and Year-Round Insights
On this page, we’ll explore Nagano’s temperature statistics in detail, including day and night variations and monthly averages. We’ll also compare the annual temperature to other cities in Japan.
Monthly Temperature Averages
Visitors to Nagano can expect significant temperature changes throughout the year. Average maximum daytime temperatures range from a comfortable 29°C in August, the warmest time of the year, to a chilly 3°C during cooler months like January. At night, minimum temperatures typically average around -6°C during these months.
The chart below illustrates the average maximum day and minimum night temperatures in Nagano by month:
The lowest temperatures typically occur between 4 AM and 6 AM, while the peak temperatures are generally observed around 3 PM, coinciding with the sun’s strongest heating effect. August, the city’s warmest month, enjoys 206 hours of sunshine.
The chart below shows the average temperature throughout the year:
January, the city’s coldest month, sees about 155 mm of rainfall spread over roughly 24 days. It records 128 hours of sunshine of sunshine.
Annual Temperatures in Japan Compared
The map below shows the annual temperature across Japan. You can also select the different months in case you are interested in a specific month.
very warm
warm
pleasant
moderate
cold
very cold
Nagano Temperatures Compared World Wide
Nagano’s average annual maximum temperature is 16°C. Let’s compare this with some popular tourist destinations:
Athens, Greece, experiences an average annual temperature of 23°C, with hot summers and mild winters typical of a Mediterranean climate.
In Toronto, Canada, the average annual temperature is 13°C, with snowy winters and warm summers.
Chicago, USA, has a significant seasonal range, with an average annual temperature of 15°C.
Melbourne, Australia, has a slightly cooler climate, with an average annual temperature of 20°C.
How does the temperature feel?
Humidity is an essential factor in how you experience temperature. When a warm period is accompanied by high humidity, it results in a higher perceived temperature. This is especially true when temperatures exceed 25°C, as it can cause greater discomfort.
On the other hand, in cooler months, especially when temperatures dip below 10°C, high humidity can intensify the cold. This makes the air feel much colder than it really is.
In Nagano, during the coolest month, January, you will experience 78% humidity, which is considered high. This is accompanied by an average maximum temperature of 3°C. In the warmest month, August, the humidity is 72% combined with an average maximum temperature of 29°C, which creates a high-feel temperature. Explore our detailed page on humidity levels for further details.
How are these Temperatures Measured?
Generally, temperature data depicting climate is usually given over a 30-year average in order to reduce short-term fluctuations and reveal better long-term trends in climate conditions.
This temperature data is taken from land-based thermometers, ocean buoys, ships, and satellites. These measurements are transmitted to weather stations and climate centers around the globe where they are processed, averaged, and analyzed in order to monitor the trends and create climate models.
Temperatures in the Mountains
Although not all regions have mountains, elevated areas exhibit distinct temperature variations.
- Sun Exposure: Sunlit slopes tend to be warmer, while shaded areas remain cooler.
- Altitude Effects: Temperatures drop by approximately 6°C for every 1,000 meters of elevation, creating distinct microclimates.
For more detailed information about Nagano’s weather, including monthly rainfall, sunshine hours, and humidity levels, visit our Nagano climate page.
Current temperature in Nagano
2 m/s
partly cloudy and slight snow
4 m/s
partly cloudy and snow
2 m/s
partly cloudy and no rain
