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Hitachi Sea Temperature in December

Japan

November Hitachi year-round → January

Average sea temperature for Hitachi, Japan across December, based on 10 years of daily readings.

Average

17.43° C

High

20.62° C

Low

14.11° C

At this temperature, water will feel cold compared to a swimming pool, but with a bit of experience and practice most people will find the water relatively comfortable to swim in.

December is the 8th warmest of 12 months at Hitachi. On average the water sits 1.5° than the year-round mean of 18.95° C.

Compared to November, December is 2.1° cooler than (19.51° C in November). By January the water is usually 15.48° C.

Hitachi Day-by-Day Water Temperature in December

10-year low, average and high

13.0° C
15.3° C
17.5° C
19.8° C
22.0° C
1
5
10
15
20
25
31
Day-by-day low and high band with the 10-year daily average through December. Range Average

Each vertical bar above is one day of December. The shaded band covers the range the water has reached on that day across the last 10 years — the lowest reading at the bottom, the highest at the top. The line running through the bars is the daily average over those 10 years, so you can see the typical shape of the month at Hitachi.

A narrow band means the temperature on that day has stayed close to the average year on year. A taller band means it has swung more, often because of changeable weather around that time of year. Hovering a day pulls up its low, average, and high.

December Water Temperature Table for Hitachi

10-year daily averages

Day Average Low High
December 1 18.35° C 15.66° C 20.32° C
December 2 18.3° C 15.64° C 20.62° C
December 3 18.25° C 16.05° C 20.61° C
December 4 18.19° C 15.88° C 20.27° C
December 5 18.11° C 15.91° C 19.88° C
December 6 17.94° C 15.9° C 19.97° C
December 7 18.12° C 15.73° C 20.18° C
December 8 18.22° C 15.51° C 19.94° C
December 9 18.09° C 15.35° C 19.98° C
December 10 18.1° C 15.31° C 20.58° C
December 11 18.02° C 14.94° C 20.45° C
December 12 17.99° C 14.76° C 20.56° C
December 13 17.87° C 15.09° C 20.17° C
December 14 17.74° C 14.95° C 19.36° C
December 15 17.51° C 14.79° C 19.42° C
December 16 17.41° C 14.64° C 19.58° C
December 17 17.39° C 14.55° C 19.94° C
December 18 17.33° C 14.53° C 19.92° C
December 19 17.17° C 14.5° C 19.39° C
December 20 16.93° C 14.25° C 18.84° C
December 21 16.76° C 14.12° C 18.4° C
December 22 16.72° C 14.11° C 18.23° C
December 23 16.73° C 14.29° C 18.27° C
December 24 16.78° C 14.87° C 18.26° C
December 25 16.79° C 15.41° C 18.08° C
December 26 16.74° C 15.65° C 17.93° C
December 27 16.64° C 15.57° C 17.54° C
December 28 16.7° C 15.49° C 17.57° C
December 29 16.59° C 15.44° C 17.43° C
December 30 16.4° C 15.48° C 17.14° C
December 31 16.41° C 15.52° C 17.12° C

Where December Sits in the Year

December highlighted

6.5° C
12.5° C
18.5° C
24.5° C
30.5° C
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
15.48° C
14.28° C
14.33° C
15.19° C
17.53° C
20.24° C
22.67° C
24.95° C
24.3° C
21.55° C
19.51° C
17.43° C
10-year monthly history for Hitachi. Bars span historical low to high; the line marks the monthly average. Range Average
January → February → March → April → May → June → July → August → September → October → November → December →

Nearby Locations in December

Compare other Japan water for the same month

Hitachi Location

36.5991, 140.6505

36.59913, 140.65047 View on OpenStreetMap →

Hitachi sits at 36.5991°N, 140.6505°E, on the coast of Japan. The marker on the map shows the spot the readings on this page come from. It usually sits a short distance from the town centre, out on the open water itself, so the numbers stay tied to the coast rather than a generic point inland.

Coastlines bend, headlands focus the water, and the temperature can run noticeably differently between two beaches that look close together on a map. Comparing nearby locations is a quick way to see how local geography is shaping the readings.

Nearest locations to Hitachi