Chikuma Temperature by Month
Chikuma in Nagano Prefecture, Japan sees significant seasonal temperature differences, with daytime highs between 3°C (37°F) in January and 29°C (84°F) in August, averaging 16°C (61°F) annually. Explore the full monthly breakdown below.
Chikuma Monthly Temperatures
In Chikuma, temperatures can shift dramatically between warm in summer and cold in winter. Nights follow the same pattern, with lows ranging 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 Chikuma by month:
The coolest part of the day is typically between 4 AM and 6 AM, while 3 PM is usually the warmest, when solar heating is at its peak. August, the city's warmest month, averages 206 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Chikuma 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
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moderate
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Chikuma vs World: Temperature Compared
Chikuma's average annual maximum temperature is 16°C (61°F). To put that in context, here's how it compares to a few well-known destinations:
Lisbon, Portugal averages 21°C (70°F) annually — warm summers, mild winters, and rain mainly in the cooler months.
On the cooler end, Oslo, Norway averages just 10°C (50°F) annually, with pleasant summers but long, cold winters.
Boston, USA averages 16°C (61°F) annually, with four distinct seasons and cold winters that rival northern Europe.
Melbourne, Australia averages 20°C (68°F) annually — known for unpredictable weather, with four seasons sometimes happening in one day.
What Does the Temperature Feel Like in Chikuma?
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 Chikuma, 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 29°C (84°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.
Seasonal temperature shifts influence more than just how warm it feels — they also drive changes in rainfall, cloud cover, and wind patterns throughout the year.
Warmer air holds more moisture, which tends to mean heavier or more frequent rain during the warmer months. When temperatures drop in winter, any precipitation that does fall is more likely to come as snow or sleet, though in Chikuma this rarely lasts long on the ground.
For more on Chikuma's weather — including monthly rainfall, sunshine hours, and humidity — visit our Chikuma climate page.
