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Aonae Sea Temperature in December

Hokkaido, Japan

November Aonae year-round → January

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

Average

11.57° C

High

15.09° C

Low

7.79° C

Water at this temperature is cold and will feel very cold initially, but the body will get used to it and longer swims are possible. Experienced swimmers can manage several hours of swimming, however hypothermia is still a real risk.

December is the 8th warmest of 12 months at Aonae. On average the water sits 3.2° than the year-round mean of 14.81° C.

Compared to November, December is 2.4° cooler than (13.99° C in November). By January the water is usually 9.87° C.

Aonae Day-by-Day Water Temperature in December

10-year low, average and high

6.5° C
9.0° C
11.5° C
14.0° C
16.5° 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 Aonae.

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 Aonae

10-year daily averages

Day Average Low High
December 1 12.06° C 8.55° C 14.66° C
December 2 11.91° C 8.01° C 14.82° C
December 3 11.91° C 7.79° C 14.81° C
December 4 12.19° C 9.41° C 14.88° C
December 5 12.33° C 10.53° C 14.97° C
December 6 12.31° C 9.35° C 15.09° C
December 7 12.34° C 9.49° C 14.91° C
December 8 12.31° C 9.26° C 14.32° C
December 9 12.19° C 8.93° C 14.14° C
December 10 12.07° C 8.56° C 14.01° C
December 11 12.14° C 9.08° C 14.2° C
December 12 12.14° C 9.32° C 14.59° C
December 13 12.19° C 9.29° C 14.64° C
December 14 11.87° C 9.14° C 14.52° C
December 15 11.7° C 8.74° C 14.33° C
December 16 11.56° C 8.67° C 14.2° C
December 17 11.51° C 8.69° C 14.16° C
December 18 11.3° C 8.53° C 14.02° C
December 19 11.18° C 8.45° C 13.86° C
December 20 11.13° C 8.44° C 13.83° C
December 21 11.07° C 8.87° C 13.93° C
December 22 11.18° C 9.17° C 14.02° C
December 23 11.17° C 9.25° C 13.85° C
December 24 11.01° C 8.91° C 13.1° C
December 25 10.9° C 8.7° C 12.5° C
December 26 10.93° C 9.35° C 12.88° C
December 27 10.94° C 9.28° C 13.05° C
December 28 10.87° C 9.31° C 13.03° C
December 29 10.77° C 9.14° C 13.11° C
December 30 10.72° C 8.98° C 13.21° C
December 31 10.62° C 8.83° C 13.19° C

Where December Sits in the Year

December highlighted

2.5° C
9.3° C
16.0° C
22.8° C
29.5° C
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
9.87° C
8.8° C
8.54° C
9.51° C
12.08° C
16.42° C
20.98° C
23.68° C
23.24° C
19° C
13.99° C
11.57° C
10-year monthly history for Aonae. 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

Aonae Location

42.0500, 139.4500

42.05000, 139.45000 View on OpenStreetMap →

Aonae sits at 42.0500°N, 139.4500°E, on the coast of Hokkaido, 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 Aonae