Joetsu Water Temperature

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Joetsu is a city close to Sea of Japan. August is the month with the hottest water temperature at 80.1°F / 26.7°C. The coldest month is March with an ø water temperature of 49.1°F / 9.5°C. May is the month with the lowest precipitation of 1.2in / 31.5mm and January with the highest precipitation in a year with 11.1in / 282mm. The avg. air temperature is around 76.8°F / 24.9°C, August is the month with the highest temperature. January is the coolest with 32.2°F / 0.1°C average air temperature. August, September, June, July would be the best time to visit. mild temperate climate with hot summer would be the climate here.

Joetsu Summary

Description	Value
Current water temperature	/
Warmest Month Water Temperature:	August with 26.7°C / 80.1°F
Coldest Month Water Temperature:	March with 9.5°C / 49.1°F
Warmest Month Air Temperature:	August with 24.9°C / 76.8°F
Coldest Month Air Temperature:	January with 0.1°C / 32.2°F
Wettest Month:	January with 282mm / 11.1in
Driest Month:	May with 31.5mm / 1.2in
Highest Humidity	July with 85.2%
Lowest Humidity	May with 74.8%
Best Time to Visit:	August, September, June, July
Climate Classification	mild temperate climate with hot summer

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Joetsu water temperature by month

°C

Sea of Japan water temperature by month

	Max. Water Temperature (°C)	ø. Water Temperature (°C)	Min. Water Temperature (°C)
January	13.3	12.1	11
February	11	10.2	9.7
March	9.9	9.5	9.3
April	12.2	10.6	9.5
May	17.1	14.4	12.4
June	21.3	19.4	17
July	25.7	23.4	21.4
August	26.9	26.5	25.8
September	26.2	24.9	23.3
October	23.2	21.5	19.9
November	19.8	18.2	16.6
December	16.5	14.9	13.4

°F

Sea of Japan water temperature by month

	Max. Water Temperature (°F)	ø. Water Temperature (°F)	Min. Water Temperature (°F)
January	55.9	53.8	51.8
February	51.8	50.4	49.5
March	49.8	49.1	48.7
April	54	51.1	49.1
May	62.8	57.9	54.3
June	70.3	66.9	62.6
July	78.3	74.1	70.5
August	80.4	79.7	78.4
September	79.2	76.8	73.9
October	73.8	70.7	67.8
November	67.6	64.8	61.9
December	61.7	58.8	56.1

The warmest water temperature are in August with around 80.1°F / 26.7°C. The coldest in March with an average water temperature of 49.1°F / 9.5°C.

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Joetsu weather today & 14-day weather forecast

7-day weather forecast
+9-day forecast

7-day weather forecast

Date	Weather	Max. F Min. F	Max. C Min. C	Windspeed Windir.	Precip. Rainrisk	Rel. Humidity
Dec. 31	Mix snow/rain	49 °F 38°F	9 °C 3°C	4mph (6km/h) southwest	0in (8mm) 80 %	71%
Jan. 01	Mix snow/rain	44 °F 37°F	7 °C 3°C	3mph (5km/h) west-southwest	0in (1mm) 30 %	63%
Jan. 02	Mix snow/rain	39 °F 36°F	4 °C 2°C	1mph (2km/h) southeast	1in (19mm) 90 %	85%
Jan. 03	Mix snow/rain	40 °F 33°F	4 °C 1°C	1mph (2km/h) east	0in (4mm) 65 %	78%
Jan. 04	Mix snow/rain	36 °F 31°F	2 °C -0°C	1mph (2km/h) south-southwest	1in (31mm) 95 %	82%
Jan. 05	Light snow	32 °F 19°F	0 °C -7°C	1mph (2km/h) south	0in (2mm) 85 %	85%
Jan. 06	Broken clouds	35 °F 21°F	2 °C -6°C	2mph (3km/h) south	0in (0mm) 0 %	81%

+9-day forecast

Date	Weather	Max. F Min. F	Max. C Min. C	Windspeed Windir.	Precip. Rainrisk	Rel. Humidity
Jan. 07	Mix snow/rain	36 °F 27°F	2 °C -3°C	2mph (3km/h) south-southwest	0in (11mm) 90 %	89%
Jan. 08	Heavy snow	35 °F 28°F	2 °C -2°C	2mph (4km/h) west-northwest	1in (38mm) 100 %	94%
Jan. 09	Heavy snow	28 °F 21°F	-2 °C -6°C	2mph (3km/h) west	1in (21mm) 100 %	88%
Jan. 10	Broken clouds	27 °F 26°F	-3 °C -3°C	2mph (3km/h) south	0in (0mm) 0 %	81%
Jan. 11	Flurries	31 °F 29°F	-1 °C -2°C	1mph (2km/h) south	0in (0mm) 30 %	86%
Jan. 12	Light snow	33 °F 32°F	0 °C 0°C	1mph (2km/h) south-southwest	0in (2mm) 85 %	93%
Jan. 13	Heavy snow	28 °F 27°F	-2 °C -3°C	1mph (2km/h) west	2in (39mm) 100 %	92%
Jan. 14	Heavy snow	26 °F 25°F	-4 °C -4°C	0mph (1km/h) southeast	1in (37mm) 100 %	97%
Jan. 15	Heavy snow	28 °F 28°F	-2 °C -2°C	2mph (3km/h) north-northwest	1in (22mm) 100 %	95%

Joetsu weather by month / climate table

°C

	Max. Temperature °C	ø. Temperature °C	Min. Temperature (°C)	Precip. (mm)	Rainy Days (d)	Rel. Humidity (%)
January	4.1	0.1	-3.8	282	27	83.1%
February	6.5	0.4	-4.2	159.4	22	81.5%
March	10.5	3.3	-2.7	95.9	21	78.2%
April	18.2	9.4	1.5	50.5	7	75.1%
May	23	15.6	8.2	31.5	3	74.8%
June	26.1	19.9	12.1	100.8	13	79.2%
July	29	23.6	18.2	258.9	23	85.2%
August	30.6	24.9	19.8	147	19	81.9%
September	28.3	21	14.3	156.6	14	83.1%
October	22.4	14.9	7.8	105.7	0	81.6%
November	17	8.9	3	131.9	17	82.7%
December	10.5	3	-2.6	235	25	84.2%

°F

	Max. Temperature °F	ø. Temperature °F	Min. Temperature (°F)	Precip. (in)	Rainy Days (d)	Rel. Humidity (%)
January	39.4	32.2	25.2	11.1	27	83.1%
February	43.7	32.7	24.4	6.3	22	81.5%
March	50.9	37.9	27.1	3.8	21	78.2%
April	64.8	48.9	34.7	2	7	75.1%
May	73.4	60.1	46.8	1.2	3	74.8%
June	79	67.8	53.8	4	13	79.2%
July	84.2	74.5	64.8	10.2	23	85.2%
August	87.1	76.8	67.6	5.8	19	81.9%
September	82.9	69.8	57.7	6.2	14	83.1%
October	72.3	58.8	46	4.2	0	81.6%
November	62.6	48	37.4	5.2	17	82.7%
December	50.9	37.4	27.3	9.3	25	84.2%

The hottest avg. temperature is around 76.8°F / 24.9°C, August is the month with the highest temperature. January is the coolest with 32.2°F / 0.1°C average temperature. May is the month with the lowest precipitation of 1.2in / 31.5mm and January with the maximum precipitation in a year with 11.1in / 282mm.

Activities & POI in Joetsu

Type of Activity	List
Attraction	上越市立水族博物館

Sea of Japan