Weather in Shinjuku for December 2025
Until now, December 2025 in Shinjuku has been nearly identical to the historical average, with a temperature of 14.2 °C (showing only a slight deviation of 0.1 °C).
The forecast for the next days in Shinjuku predicts temperatures to be around 13 °C, close to the historical average.
In general, the average temperature in Shinjuku at the beginning of December is 14.9 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 11.6 °C by the end of December.
Precipitation in Shinjuku during December is a rare event, with an average of fewer than 2 rainy days.
Is December a good time to visit Shinjuku? check out the best time to travel to Shinjuku page.
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Shinjuku Weather December
Temperatures trend during December in Shinjuku
December weather in Shinjuku day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Dec. |  Sunny | 17° /11° | 0 mm | 5 | |
| 2 Dec. |  Partly cloudy | 16° /13° | 0 mm | 5 | |
| 3 Dec. | Sunny | 17° /10° | 0.6 mm | 5 | |
| 4 Dec. |  Overcast | 13° /9° | 0.1 mm | 4 | |
| 5 Dec. |  Patchy rain possible | 14° /10° | 0.1 mm | 4 | |
| 6 Dec. | Sunny | 14° /10° | 0 mm | 4 | |
| 7 Dec. | Overcast | 13° /9° | 0 mm | 4 | |
| 8 Dec. | Patchy rain possible | 15° /10° | 0.1 mm | 4 | |
| 9 Dec. | Overcast | 11° /8° | 0 mm | 3 | |
| 10 Dec. | Overcast | 12° /9° | 0.1 mm | 3 | |
| 11 Dec. | Overcast | 14° /10° | 0 mm | 4 | |
| 12 Dec. | Overcast | 13° /6° | 0 mm | 4 | |
| 13 Dec. | Overcast | 13° /7° | 0 mm | 3 | |
| 14 Dec. |  Heavy rain | 14° /6° | 46.2 mm | 0.2 | |
| 15 Dec. | Sunny | 13° /10° | 0 mm | 0.4 | |
| 16 Dec. | Sunny | 11° /8° | 0 mm | 0.4 | |
| 17 Dec. | Sunny | 12° /10° | 0 mm | 0.4 | |
| 18 Dec. | Patchy rain possible | 12° /9° | 0.1 mm | 0.3 | |
| 19 Dec. | Partly cloudy | 13° /10° | 0.1 mm | 4 | |
| 20 Dec. | Patchy rain possible | 17° /13° | 0.8 mm | 4 | |
| 21 Dec. |  Moderate rain | 15° /13° | 7.2 mm | 3 | |
| 22 Dec. | Patchy rain possible | 11° /10° | 0.6 mm | 3 | |
| 23 Dec. | Heavy rain | 19° /12° | 25.1 mm | 4 | |
| 24 Dec. | Patchy rain possible | 14° /13° | 0.6 mm | 3 | |
| 25 Dec. | Sunny | 15° /12° | 0 mm | 4 | |
| 26 Dec. | Sunny | 10° /8° | 0 mm | 3 | |
| 27 Dec. | Partly cloudy | 9° /7° | 0 mm | 3 | |
| 28 Dec. | Partly cloudy | 11° /6° | 0 mm | 4 | |
| 29 Dec. | Sunny | 12° /7° | 0 mm | 4 | |
| 30 Dec. | Overcast | 10° /6° | 0 mm | 3 | |
| 31 Dec. | Overcast | 14° /8° | 0 mm | 3 | |
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Shinjuku weather in December vs November vs January
| November | December | January | |
|---|---|---|---|
| Weather | Patchy rain possible |  Cloudy | Cloudy |
| Temperatures | 17°/14° | 13°/8° | 10°/6° |
| Rainfall | 193 mm | 5 mm | 60 mm |
| Wind | 33.3 km/h | 32 km/h | 30.4 km/h |
| Humidity | 65% | 52% | 52% |
| Rainy days | 11 days | 1 days | 4 days |
| Dry days | 19 days | 30 days | 27 days |
Planning a trip to Shinjuku? Discover the best time to visit
Shinjuku in December - FAQ
What to pack to Shinjuku in December?
As you prepare for your trip to Shinjuku 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 Shinjuku, during December, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Warm Clothing: Sweaters, hoodies, long pants
- Accessories
- Scarves: To protect you from the cold wind
- Gloves/Mittens: Essential for cold weather
- Warm Hats: Warm hats for insulation in cold weather
December rainfall patterns in Shinjuku
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Where is Shinjuku?Get accurate weather forecasts for Shinjuku, located at latitude 35.295 and longitude 139.571. Stay updated with localized weather information tailored for Shinjuku.