Nagano
December
Weather in Nagano for December 2025
Your guide to Nagano weather in December - trends and predictions
Nagano is transformed into a snow paradise in December, with more than 20 snowy days on average.
In general, the average temperature in Nagano at the beginning of December is 7.4 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 3.3 °C by the end of December.
Is December a good time to visit Nagano? check out the best time to travel to Nagano page.
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Snow Forecast ❄️
Temperatures
More
3
Dry days
3
Rainy days
25
Snow days
5°/-3°
Temperatures
8 km/h
Avg max wind
82 %
Avg humidity
Nagano in December average weather
Move between months or click on a day
| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  7° | 2  7° | 3  9° | 4  7° | 5  6° | 6 9° | 7 7° |
| 8 6° | 9  9° | 10  9° | 11 7° | 12 8° | 13 7° | 14 6° |
| 15  6° | 16 6° | 17  5° | 18 1° | 19 2° | 20 3° | 21 5° |
| 22 2° | 23 2° | 24 4° | 25 3° | 26 3° | 27 2° | 28 4° |
| 29  5° | 30 4° | 31 2° |
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Temperatures trend during December in Nagano
See the weather trend as well as the moving average line
December weather day by day
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| Date | Weather | Temperatures | Rain | Snow | More |
|---|---|---|---|---|---|
| 1 Dec. | Moderate or heavy rain shower | 7° /-2° | 9.6 mm | 0.7 cm | |
| 2 Dec. | Patchy moderate snow | 7° /-2° | 3.3 mm | 0.4 cm | |
| 3 Dec. | Sunny | 9° /-2° | 0.8 mm | 0 cm | |
| 4 Dec. | Heavy rain at times | 7° /-1° | 7.6 mm | 0.6 cm | |
| 5 Dec. | Light freezing rain | 6° /-2° | 1 mm | 0 cm | |
| 6 Dec. | Moderate rain at times | 9° /-2° | 6.3 mm | 0.5 cm | |
| 7 Dec. | Moderate or heavy rain shower | 7° /-1° | 14.2 mm | 4.3 cm | |
| 8 Dec. | Moderate or heavy rain shower | 6° /-1° | 14.4 mm | 3.4 cm | |
| 9 Dec. | Partly cloudy | 9° /-3° | 0.5 mm | 0.1 cm | |
| 10 Dec. | Patchy rain possible | 9° /-2° | 0.2 mm | 0 cm | |
| 11 Dec. | Patchy rain possible | 7° /0° | 5.2 mm | 0.7 cm | |
| 12 Dec. | Heavy rain at times | 8° /0° | 6.5 mm | 0.2 cm | |
| 13 Dec. | Light freezing rain | 7° /-1° | 5.9 mm | 0.2 cm | |
| 14 Dec. | Moderate or heavy rain shower | 6° /-3° | 11.1 mm | 3.3 cm | |
| 15 Dec. | Moderate or heavy snow showers | 6° /-3° | 11.2 mm | 2.2 cm | |
| 16 Dec. | Patchy moderate snow | 6° /-2° | 11.1 mm | 3.5 cm | |
| 17 Dec. | Moderate snow | 5° /-4° | 15.2 mm | 5.7 cm | |
| 18 Dec. | Moderate or heavy snow showers | 1° /-5° | 9.7 mm | 5.4 cm | |
| 19 Dec. | Moderate or heavy snow showers | 2° /-7° | 7.4 mm | 4.4 cm | |
| 20 Dec. | Light freezing rain | 3° /-6° | 4.1 mm | 2.2 cm | |
| 21 Dec. | Light freezing rain | 5° /-6° | 3.2 mm | 1.9 cm | |
| 22 Dec. | Moderate or heavy snow showers | 2° /-6° | 14.4 mm | 9.1 cm | |
| 23 Dec. | Moderate or heavy snow showers | 2° /-7° | 2.6 mm | 1.8 cm | |
| 24 Dec. | Moderate or heavy snow showers | 4° /-7° | 8.8 mm | 5.4 cm | |
| 25 Dec. | Moderate snow | 3° /-6° | 13.7 mm | 6.1 cm | |
| 26 Dec. | Light freezing rain | 3° /-7° | 9.3 mm | 5.3 cm | |
| 27 Dec. | Light freezing rain | 2° /-6° | 8.5 mm | 5.3 cm | |
| 28 Dec. | Patchy rain possible | 4° /-6° | 6.7 mm | 4.1 cm | |
| 29 Dec. | Overcast | 5° /-5° | 5.3 mm | 2.8 cm | |
| 30 Dec. | Moderate or heavy snow showers | 4° /-6° | 12.3 mm | 4.6 cm | |
| 31 Dec. | Light freezing rain | 2° /-6° | 14.9 mm | 7.3 cm | |
| Next | |||||
Important Notice
Our weather forecast for Nagano in December is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Nagano forecast closer to your planned date for the most up-to-date weather information.
Nagano in December - FAQ
What are the expected maximum and minimum temperatures in Nagano during December?
Brace for cold days with temperatures not exceeding 5° and nights that are likely to be freezing. Winter clothing is essential for comfort and safety.
How much rainfall should be expected in Nagano during December?
Significant rainfall exceeding 245.6 mm is expected in Nagano during December, occurring over more than 3 days. Preparing for wet conditions is recommended in your planning.
Will it snow in Nagano in December 2025?
Nagano experiences an average snowfall of 83.2805 cm during December, occurring over 25 days.
What are the typical wind conditions in Nagano during December?
The average wind speed in Nagano during December is 8 km/h, suggesting breezy to windy conditions, depending on your activities.
What to pack to Nagano in December?
As you prepare for your trip to Nagano in December, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Nagano, during December, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Warm Clothing: Sweaters, hoodies, long pants
- Rain Gear: Lightweight, waterproof clothing
- Thermal Wear: Base layers for cold destinations
- All-Weather Jacket: Waterproof and breathable
- Footwear
- Waterproof Shoes
- Insulated Boots: For snowy and extremely cold temperatures
- Accessories
- Scarves: To protect you from the cold wind
- Gloves/Mittens: Essential for cold weather
- Warm Hats: Warm hats for insulation in cold weather
- Umbrellas/Raincoats: For rainy days
Nagano snow forecast December 2025
Track daily snowfall levels and discover Nagano’s snowy potential this December ❄️
December rainfall patterns in Nagano
Explore the daily rainfall trends and prepare for Naganos December weather 💧
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