Niigata — Water Temperature in June

Water Temperature Range

15°C

minimum

19°C

average

25°C

maximum

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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
JUN 1	-10°C	18°C	16°C	16°C
JUN 2	19°C	17°C	16°C	17°C
JUN 3	19°C	17°C	16°C	17°C
JUN 4	20°C	17°C	15°C	18°C
JUN 5	19°C	18°C	16°C	18°C
JUN 6	20°C	17°C	16°C	18°C
JUN 7	20°C	18°C	18°C	18°C
JUN 8	19°C	18°C	18°C	18°C
JUN 9	-10°C	18°C	17°C	18°C
JUN 10	19°C	18°C	17°C	18°C
JUN 11	19°C	19°C	17°C	19°C
JUN 12	19°C	19°C	18°C	20°C
JUN 13	20°C	19°C	18°C	20°C
JUN 14	20°C	19°C	18°C	20°C
JUN 15	20°C	19°C	18°C	20°C
JUN 16	21°C	19°C	18°C	20°C
JUN 17	21°C	20°C	18°C	21°C
JUN 18	21°C	20°C	19°C	21°C
JUN 19	22°C	20°C	19°C	21°C
JUN 20	23°C	20°C	19°C	20°C
JUN 21	22°C	21°C	21°C	22°C
JUN 22	22°C	21°C	21°C	20°C
JUN 23	22°C	21°C	21°C	20°C
JUN 24	22°C	21°C	21°C	21°C
JUN 25	22°C	21°C	20°C	22°C
JUN 26	22°C	21°C	21°C	21°C
JUN 27	21°C	21°C	21°C	22°C
JUN 28	21°C	21°C	20°C	23°C
JUN 29	22°C	21°C	21°C	23°C
JUN 30	22°C	22°C	22°C	23°C

June: Climate and Swimming Opportunities

Average Night Air Temperature

15°C

Average Day Air Temperature

27°C

Precipitation Amount per Month

129 mm

Number of Rainy Days

Daylight per Day

14 hrs

Sunshine per Day

5 hrs

Average Wind Speed

9 km/h

Average Humidity

75%

With such a ratio between the average monthly temperatures of water and air, the swim feels brisk and very refreshing. The air is warm enough to make the cool water easy to handle, especially for short swims.