Nagano
December
Weather in Nagano for December 2026
Your guide to Nagano weather in December - trends and predictions
The climate of Nagano in December is quite snowy, averaging 14 snowy days.
In general, the average temperature in Nagano at the beginning of December is 7.2 °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.
✨ Is December a good time to visit Nagano? – Ask the AI Weatherman
Snow Forecast ❄️
Temperatures
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10
Dry days
7
Rainy days
14
Snow days
5°/-4°
Temperatures
8 km/h
Avg max wind
83 %
Avg humidity
Nagano Weather December
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What’s the Weather Like in Nagano This December?
Discover the average temperatures and weather trends across Nagano’s cities this December.
Temperatures trend during December in Nagano
See the weather trend as well as the moving average line
December weather in Nagano day by day
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| Date | Weather | Temperatures | Rain | Snow | More |
|---|---|---|---|---|---|
| 1 Dec. |  Moderate or heavy rain shower | 8° /-1° | 7.7 mm | 0.6 cm | |
| 2 Dec. |  Light rain | 8° /-1° | 2.7 mm | 0.3 cm | |
| 3 Dec. |  Light rain shower | 9° /-2° | 2.2 mm | 0.3 cm | |
| 4 Dec. |  Heavy rain at times | 6° /-2° | 8.6 mm | 2.3 cm | |
| 5 Dec. |  Light freezing rain | 5° /-3° | 3.6 mm | 2 cm | |
| 6 Dec. | Moderate rain at times | 8° /-3° | 5.1 mm | 0.4 cm | |
| 7 Dec. |  Moderate rain | 6° /-2° | 11.4 mm | 3.5 cm | |
| 8 Dec. | Moderate rain | 6° /-1° | 12.8 mm | 2.8 cm | |
| 9 Dec. |  Partly cloudy | 8° /-3° | 0.9 mm | 0.4 cm | |
| 10 Dec. | Patchy rain possible | 8° /-2° | 0.3 mm | 0 cm | |
| 11 Dec. | Light rain | 8° /-1° | 5.9 mm | 0.6 cm | |
| 12 Dec. | Heavy rain at times | 7° /-1° | 7.3 mm | 1.5 cm | |
| 13 Dec. | Light freezing rain | 6° /-2° | 4.9 mm | 0.2 cm | |
| 14 Dec. | Moderate rain | 5° /-3° | 12.1 mm | 3.2 cm | |
| 15 Dec. |  Light snow | 5° /-3° | 12.4 mm | 4 cm | |
| 16 Dec. | Light snow | 5° /-3° | 9.3 mm | 2.9 cm | |
| 17 Dec. | Light freezing rain | 5° /-4° | 14.2 mm | 4.8 cm | |
| 18 Dec. |  Moderate or heavy snow showers | 1° /-5° | 8.9 mm | 5 cm | |
| 19 Dec. | Light snow | 2° /-7° | 6.1 mm | 3.6 cm | |
| 20 Dec. | Light freezing rain | 4° /-5° | 3.4 mm | 1.8 cm | |
| 21 Dec. | Light freezing rain | 6° /-5° | 4.3 mm | 1.6 cm | |
| 22 Dec. | Moderate or heavy snow showers | 2° /-5° | 12.6 mm | 7.9 cm | |
| 23 Dec. | Light snow | 3° /-6° | 2.2 mm | 1.5 cm | |
| 24 Dec. | Light snow | 4° /-6° | 8.7 mm | 4.5 cm | |
| 25 Dec. |  Moderate snow | 3° /-5° | 13.2 mm | 5.1 cm | |
| 26 Dec. | Light freezing rain | 3° /-6° | 11.8 mm | 7.2 cm | |
| 27 Dec. | Light freezing rain | 2° /-7° | 7.1 mm | 4.4 cm | |
| 28 Dec. | Light rain | 3° /-6° | 5.6 mm | 3.5 cm | |
| 29 Dec. | Light snow | 5° /-5° | 4.4 mm | 2.4 cm | |
| 30 Dec. | Light snow | 4° /-5° | 10.8 mm | 3.9 cm | |
| 31 Dec. | Moderate or heavy snow showers | 2° /-5° | 13.2 mm | 6.6 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.
Change Month
Nagano weather in December vs November vs January
Compare December weather in Nagano with the previous and following months. See how temperature, rainfall, wind, and other conditions change throughout the year to help you plan your visit.
| November | December | January | |
|---|---|---|---|
| Weather | Patchy rain possible | Moderate snow | Moderate snow |
| Temperatures | 12°/2° | 5°/-4° | 2°/-7° |
| Rainfall | 145 mm | 234 mm | 217 mm |
| Snowfall | 7 cm | 88 cm | 112 cm |
| Wind | 8.2 km/h | 7.9 km/h | 8.6 km/h |
| Humidity | 78% | 83% | 86% |
| Rainy days | 13 days | 7 days | 4 days |
| Snow days | 3 days | 14 days | 21 days |
| Dry days | 14 days | 10 days | 6 days |
Planning a trip to Nagano? Discover the best time to visit
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 233.8 mm is expected in Nagano during December, occurring over more than 7 days. Preparing for wet conditions is recommended in your planning.
Will it snow in Nagano in December 2026?
Nagano experiences an average snowfall of 88.5 cm during December, occurring over 14 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.
Nagano snow forecast December 2026
Track daily snowfall levels and discover Nagano’s snowy potential this December ❄️
On average, Nagano sees 14 snowy days during December, with approximately 88.5 cm of total snowfall.
December rainfall patterns in Nagano
Explore the daily rainfall trends and prepare for Naganos December weather 💧
Typically, Nagano has 7 rainy days in December with a total of 233.8 mm of rainfall.
What to pack to Nagano in December?
Cold & raw · highs around 5 °C, frequent showers
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.
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