Climate averages 1991–2020
Ōsaki weather
in December.
A cold, moderately wet month: the 10th warmest and the 3rd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a cold month in Ōsaki: daytime highs average 6.2°C and nights cool to about -1.5°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 58 mm of rain on roughly 10 days, which makes December a moderately wet month (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 9 h 32 min on an average December day.
The nearest other city in this atlas is Tome (21 km away). In December its highs average 6.3°C, about as warm as Ōsaki, with 52 mm of rain.
Among the 303 cities listed in Japan, Ōsaki ranks joint 268th of 303 for the warmest December highs and joint 60th of 303 for the driest December (rainfall, lowest first). The mean December high of those 303 cities is 9.5°C; Ōsaki is 3.3°C cooler than that mean.
From December to January, average highs fall by 2.6°C to 3.6°C, and monthly rainfall falls from 58 mm to 56 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
Ōsaki climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 3.6°C-4.2°C | -4.2°C | 56 | 9.2 | 9.810 h |
| February | 4.5°C-4.2°C | -4.2°C | 48 | 8.2 | 10.711 h |
| March | 8.6°C-1.3°C | -1.3°C | 89 | 11.0 | 11.912 h |
| April | 14.6°C3.9°C | 3.9°C | 97 | 11.4 | 13.213 h |
| May | 19.6°C9.8°C | 9.8°C | 109 | 11.4 | 14.314 h |
| June | 22.6°C14.6°C | 14.6°C | 132 | 12.8 | 14.815 h |
| July | 25.8°C19.0°C | 19.0°C | 188 | 16.7 | 14.615 h |
| August | 27.2°C20.4°C | 20.4°C | 165 | 15.5 | 13.714 h |
| September | 23.6°C16.7°C | 16.7°C | 168 | 14.0 | 12.512 h |
| October | 18.2°C9.9°C | 9.9°C | 141 | 10.7 | 11.211 h |
| November | 12.2°C3.4°C | 3.4°C | 65 | 8.5 | 10.110 h |
| December, selected | 6.2°C-1.5°C | -1.5°C | 58 | 9.6 | 9.510 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
- Tome in DecemberJapan · 21 kmHigh 6.3°C · Low -0.9°C · 52 mm rain
- Ishinomaki in DecemberJapan · 34 kmHigh 7.5°C · Low 2.6°C · 56 mm rain
- Sendai in DecemberJapan · 37 kmHigh 6.9°C · Low 0.3°C · 58 mm rain
- Ichinoseki in DecemberJapan · 39 kmHigh 5.3°C · Low -1.9°C · 58 mm rain
- Natori-shi in DecemberJapan · 48 kmHigh 7.6°C · Low 1.7°C · 55 mm rain
- Ōshū in DecemberJapan · 64 kmHigh 4.9°C · Low -1.9°C · 68 mm rain
- Yamagata in DecemberJapan · 66 kmHigh 3.9°C · Low -3.0°C · 120 mm rain
- Kitakami in DecemberJapan · 78 kmHigh 3.7°C · Low -3.0°C · 86 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 Ōsaki) is explained once on the Ōsaki year overview and on the Sources, method and limits page.