Hamilton — Water Temperature in January

Water Temperature Range

18°C

minimum

21°C

average

23°C

maximum

Get instant access to real-time water temperatures for this and all other locations with our iOS and Android apps.

Water Temperature Chart for Month

The chart shows the average daily water temperature for each day of the month based on historical data.

Table of Water Temperatures by Day of the Month for Previous Years

Day	2026	2025	2024	2023
JAN 1	21°C	20°C	21°C	22°C
JAN 2	21°C	21°C	22°C	22°C
JAN 3	21°C	21°C	22°C	22°C
JAN 4	21°C	21°C	22°C	22°C
JAN 5	21°C	21°C	22°C	21°C
JAN 6	20°C	21°C	21°C	21°C
JAN 7	20°C	20°C	22°C	21°C
JAN 8	20°C	20°C	21°C	22°C
JAN 9	20°C	20°C	22°C	21°C
JAN 10	20°C	20°C	22°C	21°C
JAN 11	21°C	20°C	21°C	21°C
JAN 12	20°C	19°C	21°C	21°C
JAN 13	20°C	19°C	22°C	21°C
JAN 14	20°C	20°C	22°C	21°C
JAN 15	20°C	20°C	21°C	21°C
JAN 16	20°C	19°C	21°C	21°C
JAN 17	20°C	20°C	21°C	21°C
JAN 18	20°C	19°C	21°C	21°C
JAN 19	20°C	19°C	21°C	21°C
JAN 20	20°C	20°C	21°C	21°C
JAN 21	21°C	19°C	21°C	21°C
JAN 22	21°C	19°C	21°C	21°C
JAN 23	21°C	19°C	21°C	21°C
JAN 24	21°C	19°C	21°C	21°C
JAN 25	20°C	19°C	21°C	21°C
JAN 26	20°C	19°C	21°C	21°C
JAN 27	21°C	19°C	22°C	21°C
JAN 28	21°C	19°C	20°C	21°C
JAN 29	21°C	19°C	21°C	21°C
JAN 30	21°C	20°C	21°C	21°C
JAN 31	21°C	19°C	21°C	21°C

January: Climate and Swimming Opportunities

Average Night Air Temperature

15°C

Average Day Air Temperature

21°C

Precipitation Amount per Month

134 mm

Number of Rainy Days

Daylight per Day

10 hrs

Sunshine per Day

6 hrs

Average Wind Speed

23 km/h

Average Humidity

82%

With such a ratio between the average monthly temperatures of water and air, swimming feels warm and comfortable even if the day isn’t hot. The water can feel warmer than the air, so getting out may feel a bit cool.