Naganohara Temperature by Month
Naganohara, Gunma, Japan has an average annual maximum temperature of 15°C (59°F), ranging from 3°C (37°F) in January to 28°C (82°F) in August. Below you'll find a full monthly breakdown and a comparison with cities worldwide.
Naganohara Monthly Temperatures
Visitors to Naganohara will encounter a climate influenced by big temperature differences across the year. Nighttime temperatures range from 19°C (66°F) in August to -6°C (21°F) in January.
The chart below illustrates the average maximum day and minimum night temperatures in Naganohara by month:
The minimum temperature is often recorded between 4 AM and 6 AM, while the highest temperature is usually reached at 3 PM, when the sun's heating effect is strongest. August, the warmest month, gets 206 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Naganohara vs Japan
The map below shows the annual temperature across Japan. You can also select individual months if you want to compare a specific time of year.
very warm
warm
pleasant
moderate
cold
very cold
Naganohara vs World: Temperature Compared
Naganohara's average annual maximum temperature is 15°C (59°F). To put that in context, here's how it compares to a few well-known destinations:
Rome, Italy averages 20°C (68°F) annually, with reliably warm summers and comfortable winters.
Queenstown, New Zealand averages 10°C (50°F) annually — remember seasons are flipped, so its coldest months fall in June and July.
Buenos Aires, Argentina averages 23°C (73°F) a year, with hot summers and mild winters — and seasons reversed compared to Europe.
Perth, Australia averages 25°C (77°F) annually, with a classic Mediterranean climate — hot dry summers and mild wet winters.
What Does the Temperature Feel Like in Naganohara?
Temperature alone doesn't tell the whole story — humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.
In the cooler months, when temperatures drop below 10°C, high humidity makes the cold feel more cutting than it would in dry conditions.
In Naganohara, January is the coolest month, with average highs of 3°C (37°F) and humidity around 78% — considered high. In August, the warmest month, temperatures average 28°C (82°F) with 72% humidity — conditions that feel high. For a full picture, see our humidity page.
Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.
The readings come from a range of sources — land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.
For cities and regions with significant elevation, altitude is one of the biggest factors shaping local temperatures. As a rule of thumb, temperatures fall by around 6°C for every 1,000 metres gained — so a city at 2,000 metres will typically be around 12°C cooler than a city at sea level in the same region. Higher ground also tends to see more dramatic day-to-night temperature swings, since thinner air loses heat faster after sunset.
For more on Naganohara's weather — including monthly rainfall, sunshine hours, and humidity — visit our Naganohara climate page.
