Climate and monthly weather forecastJoetsu, Japan
Climate and monthly weather forecast
Weather in January
January, like December, in Joetsu, Japan, is a wintry winter month, with an average temperature ranging between max 2.8°C (37°F) and min -1.6°C (29.1°F). January, having an average high-temperature of 2.8°C (37°F) and an average low-temperature of -1.6°C (29.1°F), is the coldest month. Weather in January »Weather in February
February, the last month of the winter in Joetsu, is also an icy month, with temperature in the range of an average high of 3.4°C (38.1°F) and an average low of -1.9°C (28.6°F). The high-temperature average in February for Joetsu is a still cold 3.4°C (38.1°F), staying closely aligned with January's conditions. Weather in February »Weather in March
The first month of the spring, March, is a chilly month in Joetsu, Japan, with an average temperature ranging between max 7°C (44.6°F) and min 0.9°C (33.6°F). Joetsu observes a slight ascent in average high-temperatures during March, adjusting from an icy 3.4°C (38.1°F) in February to a chilly 7°C (44.6°F). Weather in March »Weather in April
April in Joetsu, Japan, is a cool spring month, with temperature in the range of an average high of 12.3°C (54.1°F) and an average low of 5.3°C (41.5°F). Joetsu's transition into April sees a rise in the average high-temperature, advancing from a chilly 7°C (44.6°F) in March to a fresh 12.3°C (54.1°F). Weather in April »Weather in May
May, the last month of the spring in Joetsu, is an enjoyable month, with an average temperature ranging between min 10.8°C (51.4°F) and max 18.8°C (65.8°F). Observing a rise in May, the average high-temperature goes from April's cool 12.3°C (54.1°F) to a refreshing 18.8°C (65.8°F). Weather in May »Weather in June
The first month of the summer, June, is a pleasant month in Joetsu, Japan, with temperature in the range of an average high of 22.3°C (72.1°F) and an average low of 14.6°C (58.3°F). The beginning of June signals a minor rise in the average high-temperature, moving from an enjoyable 18.8°C (65.8°F) in May to an agreeable 22.3°C (72.1°F). Weather in June »Weather in July
July in Joetsu, Japan, is a moderately hot summer month, with an average temperature fluctuating between 26.2°C (79.2°F) and 19.5°C (67.1°F). Joetsu, Japan, observes a slight uplift in the average high-temperature with the onset of July, adjusting from June's agreeable 22.3°C (72.1°F) to a moderately hot 26.2°C (79.2°F). Weather in July »Weather in August
The last month of the summer, August, is another warm month in Joetsu, Japan, with an average temperature ranging between min 20.9°C (69.6°F) and max 27.8°C (82°F). August brings the highest temperatures, with an average high of 27.8°C (82°F) and an average low of 20.9°C (69.6°F). For most parts of August, the heat index is calculated to be a tropical 32°C (89.6°F). Weather in August »Weather in September
The first month of the autumn, September, is still a warm month in Joetsu, Japan, with an average temperature varying between 16.6°C (61.9°F) and 23.3°C (73.9°F). The shift from August to September includes a small decrease in the average high-temperature, from a warm 27.8°C (82°F) to a still moderately hot 23.3°C (73.9°F). Weather in September »Weather in October
October, the same as September, is another refreshing autumn month in Joetsu, Japan, with an average temperature varying between 18°C (64.4°F) and 11.3°C (52.3°F). The arrival of October corresponds with a temperature reduction, down from September's moderately hot 23.3°C (73.9°F) to an enjoyable 18°C (64.4°F). Weather in October »Weather in November
The last month of the autumn, November, is another cool month in Joetsu, Japan, with an average temperature varying between 11.8°C (53.2°F) and 6.4°C (43.5°F). With November's arrival, Joetsu sees a decrease in average high-temperatures, moving from a comfortable 18°C (64.4°F) in October to a fresh 11.8°C (53.2°F). Weather in November »Weather in December
December, the first month of the winter in Joetsu, is also an icy month, with an average temperature fluctuating between 1.1°C (34°F) and 5.8°C (42.4°F). December's onset brings a reduction in the average high-temperature, from a cool 11.8°C (53.2°F) in November to a cold 5.8°C (42.4°F). Weather in December »Updated: Jan 31, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
With average temperatures fluctuating between a high of 2.8°C (37°F) and a low of -1.6°C (29.1°F), January stands out as the coldest month in Joetsu, Japan.
January is the most humid month in Joetsu, with an average relative humidity of 84%.
In Joetsu, during the entire year, the rain falls for 200.6 days and collects up to 1190mm (46.85") of precipitation.
Months with snowfall in Joetsu, Japan, are January through April, November and December.
The month with the most snowfall in Joetsu, Japan, is January, when snow falls for 17.4 days and typically aggregates up to 466mm (18.35") of snow.
In Joetsu, Japan, during the entire year, snow falls for 50.4 days and aggregates up to 1229mm (48.39") of snow.
January has the least sunshine of the year in Joetsu, Japan, with an average of 2.7h of sunshine.
January and December, with an average maximum UV index of 1, are months with the lowest UV index.
The month with the coldest seawater is March, with an average sea temperature of 10.3°C (50.5°F).
With an average relative humidity of 74%, May is the least humid month in Joetsu, Japan.
May is the month with the least rainfall. Rain falls for 13.8 days and accumulates 57mm (2.24") of precipitation.
In Joetsu, Japan, snow does not fall in May through October.
The month with the longest days in Joetsu, Japan, is June, with an average of 14h and 42min of daylight.
June through August, with an average maximum UV index of 6, are months with the highest UV index.
The month with the most rainfall in Joetsu is July, when the rain falls for 21.6 days and typically aggregates up to 142mm (5.59") of precipitation.
In Joetsu, temperatures reach their average annual highs in August, measuring 27.8°C (82°F) and a minimum average of 20.9°C (69.6°F).
The month with the warmest seawater in Joetsu, Japan, is August, with an average sea temperature of 27°C (80.6°F).
With an average of 10.3h of sunshine, August has the most sunshine of the year.
December has the shortest days of the year in Joetsu, with an average of 9h and 42min of daylight.
Joetsu, Japan, does not utilize Daylight Saving Time (DST). JST timezone is used over the entire year.
Average temperature
Joetsu, Japan
The warmest month (with the highest average high temperature) is August (27.8°C).
The month with the lowest average high temperature is January (2.8°C).
The month with the highest average low temperature is August (20.9°C).
The coldest month (with the lowest average low temperature) is February (-1.9°C).
Average pressure
Joetsu, Japan
- Average pressure in January:
1017.9mbar - Average pressure in February:
1019mbar - Average pressure in March:
1017mbar - Average pressure in April:
1014.9mbar - Average pressure in May:
1012.2mbar - Average pressure in June:
1009.2mbar
- Average pressure in July:
1009.5mbar - Average pressure in August:
1010.2mbar - Average pressure in September:
1013.9mbar - Average pressure in October:
1017.6mbar - Average pressure in November:
1019.2mbar - Average pressure in December:
1017.6mbar
The month with the highest atmospheric pressure is November (1019.2mbar).
The month with the lowest atmospheric pressure is June (1009.2mbar).
Average wind speed
Joetsu, Japan
- Average wind speed in January:
15.4km/h - Average wind speed in February:
14.1km/h - Average wind speed in March:
12.8km/h - Average wind speed in April:
11.3km/h - Average wind speed in May:
9.5km/h - Average wind speed in June:
8.4km/h
- Average wind speed in July:
7.7km/h - Average wind speed in August:
7.7km/h - Average wind speed in September:
9km/h - Average wind speed in October:
10.5km/h - Average wind speed in November:
12.1km/h - Average wind speed in December:
15.4km/h
The windiest months (with the highest average wind speed) are January and December (15.4km/h).
The calmest months (with the lowest average wind speed) are July and August (7.7km/h).
Average humidity
Joetsu, Japan
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is May (74%).
Average rainfall
Joetsu, Japan
The wettest month (with the highest rainfall) is July (142mm).
The driest month (with the least rainfall) is May (57mm).
Average rainfall days
Joetsu, Japan
- Average rainfall days in January:
14.3 days - Average rainfall days in February:
10.3 days - Average rainfall days in March:
16.3 days - Average rainfall days in April:
15.5 days - Average rainfall days in May:
13.8 days - Average rainfall days in June:
16 days
- Average rainfall days in July:
21.6 days - Average rainfall days in August:
19.4 days - Average rainfall days in September:
16.5 days - Average rainfall days in October:
17.5 days - Average rainfall days in November:
19.4 days - Average rainfall days in December:
20 days
The month with the highest number of rainy days is July (21.6 days).
The month with the least rainy days is February (10.3 days).
Average snowfall
Joetsu, Japan
The month with the highest snowfall is January (466mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days
Joetsu, Japan
- Average snowfall days in January:
17.4 days - Average snowfall days in February:
14.3 days - Average snowfall days in March:
7.5 days - Average snowfall days in April:
0.8 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0 days - Average snowfall days in November:
0.3 days - Average snowfall days in December:
10.1 days
The month with the highest number of snowfall days is January (17.4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature
Joetsu, Japan
The best month for swimming (with the highest average sea temperature) is August (27°C).
The coldest month (with the lowest average sea temperature) is March (10.3°C).
Average daylight / Average sunshine
Joetsu, Japan
- Average daylight in January:
9h and 54min - Average daylight in February:
10h and 48min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 12min - Average daylight in May:
14h and 12min - Average daylight in June:
14h and 42min
- Average daylight in July:
14h and 24min - Average daylight in August:
13h and 36min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 12min - Average daylight in November:
10h and 12min - Average daylight in December:
9h and 42min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in January:
2h and 42min - Average sunshine in February:
3h and 24min - Average sunshine in March:
5h and 42min - Average sunshine in April:
8h and 48min - Average sunshine in May:
9h and 36min - Average sunshine in June:
9h and 42min
- Average sunshine in July:
9h and 18min - Average sunshine in August:
10h and 18min - Average sunshine in September:
8h and 18min - Average sunshine in October:
6h and 42min - Average sunshine in November:
4h and 42min - Average sunshine in December:
3h and 24min
The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 2h and 42min).
Average sunshine days
Joetsu, Japan
- Average sunshine days in January:
4.3 days - Average sunshine days in February:
6.9 days - Average sunshine days in March:
8.7 days - Average sunshine days in April:
12.8 days - Average sunshine days in May:
15.1 days - Average sunshine days in June:
11.9 days
- Average sunshine days in July:
7.4 days - Average sunshine days in August:
8.3 days - Average sunshine days in September:
11.5 days - Average sunshine days in October:
11.6 days - Average sunshine days in November:
9.4 days - Average sunshine days in December:
5 days
The month with the most sunshine days is May (15.1 days).
The month with the least sunshine days is January (4.3 days).
Average UV index
Joetsu, Japan
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover
Joetsu, Japan
The month with the most cloud cover is January (Cloud cover 74).
The month with the least cloud cover is May (Cloud cover 35).
Average visibility
Joetsu, Japan
The months with the highest visibility are October and November (10km).
The month with the lowest visibility is January (8km).
