Climate averages 1991–2020
Tsubame weather
in December.
A cold, very wet month: the 10th warmest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a cold month in Tsubame: daytime highs average 7.3°C and nights cool to about 1.7°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 182 mm of rain on roughly 23 days, which makes December a very wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 9 h 37 min on an average December day.
The nearest other city in this atlas is Sanjō (6 km away). In December its highs average 7.1°C, about as warm as Tsubame, with 202 mm of rain.
Among the 303 cities listed in Japan, Tsubame ranks joint 253rd of 303 for the warmest December highs and joint 284th of 303 for the driest December (rainfall, lowest first). The mean December high of those 303 cities is 9.5°C; Tsubame is 2.2°C cooler than that mean.
From December to January, average highs fall by 3.2°C to 4.0°C, and monthly rainfall falls from 182 mm to 172 mm.
The annual picture
December in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Tsubame climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 4.0°C-0.9°C | -0.9°C | 172 | 24.8 | 9.910 h |
| February | 4.7°C-1.4°C | -1.4°C | 118 | 20.1 | 10.811 h |
| March | 8.9°C1.0°C | 1.0°C | 121 | 19.3 | 11.912 h |
| April | 14.8°C5.5°C | 5.5°C | 91 | 13.8 | 13.113 h |
| May | 20.3°C11.0°C | 11.0°C | 96 | 12.0 | 14.214 h |
| June | 23.9°C16.2°C | 16.2°C | 117 | 12.1 | 14.715 h |
| July | 27.2°C20.9°C | 20.9°C | 214 | 15.8 | 14.514 h |
| August | 28.8°C22.3°C | 22.3°C | 149 | 13.7 | 13.614 h |
| September | 25.0°C18.6°C | 18.6°C | 139 | 14.3 | 12.512 h |
| October | 19.2°C12.4°C | 12.4°C | 146 | 14.6 | 11.311 h |
| November | 13.3°C6.6°C | 6.6°C | 156 | 18.6 | 10.210 h |
| December, selected | 7.3°C1.7°C | 1.7°C | 182 | 23.3 | 9.610 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
December in nearby cities
- Sanjō in DecemberJapan · 6 kmHigh 7.1°C · Low 0.6°C · 202 mm rain
- Nagaoka in DecemberJapan · 25 kmHigh 7.0°C · Low 0.2°C · 181 mm rain
- Niigata in DecemberJapan · 30 kmHigh 7.5°C · Low 2.7°C · 195 mm rain
- Kashiwazaki in DecemberJapan · 47 kmHigh 7.4°C · Low 0.8°C · 208 mm rain
- Shibata in DecemberJapan · 48 kmHigh 6.4°C · Low 0.7°C · 233 mm rain
- Jōetsu in DecemberJapan · 84 kmHigh 7.4°C · Low 1.2°C · 247 mm rain
- Aizu-Wakamatsu in DecemberJapan · 92 kmHigh 5.2°C · Low -0.8°C · 93 mm rain
- Yonezawa in DecemberJapan · 108 kmHigh 4.7°C · Low -1.6°C · 181 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Tsubame) is explained once on the Tsubame year overview and on the Sources, method and limits page.