May weather forecastJoetsu, Japan
May
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).Temperature
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). In Joetsu, the average temperature during the nights of May drops to a fresh 10.8°C (51.4°F).Humidity
The least humid month in Joetsu is May, with an average relative humidity of 74%.Rainfall
May is the month with the least rainfall. Rain falls for 13.8 days and accumulates 57mm (2.24") of precipitation.Snowfall
May through October are months without snowfall in Joetsu, Japan.Sea temperature
In Joetsu, the average seawater temperature in May is 14.8°C (58.6°F).Note: Dipping into 14.8°C (58.6°F) below 10°C (50°F) is possible with the right protection; absent that, anticipate cold shock and hampered breathing. Swimming momentarily at 13°C (55.4°F) can be jarring.
Daylight
In Joetsu, the average length of the day in May is 14h and 10min.On the first day of May, sunrise is at 04:52 and sunset at 18:36. On the last day of the month, sunrise is at 04:28 and sunset at 19:00 JST.
Sunshine
In Joetsu, Japan, the average sunshine in May is 9.6h.UV index
The average daily maximum UV index in May in Joetsu, Japan, is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: In May, a daily maximum UV index of 4 leads to the following instructions:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Joetsu, Japan
- Average high temperature in May: 18.8°C
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).
- Average low temperature in May: 10.8°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 in May
Joetsu, Japan
- Average pressure in May: 1012.2mbar
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 in May
Joetsu, Japan
- Average wind speed in May: 9.5km/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 in May
Joetsu, Japan
- Average humidity in May: 74%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is May (74%).
Average rainfall in May
Joetsu, Japan
- Average rainfall in May: 57mm
The wettest month (with the highest rainfall) is July (142mm).
The driest month (with the least rainfall) is May (57mm).
Average rainfall days in May
Joetsu, Japan
- Average rainfall days in May: 13.8 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 in May
Joetsu, Japan
- Average snowfall in May: 0mm
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 in May
Joetsu, Japan
- Average snowfall days in May: 0 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 in May
Joetsu, Japan
- Average sea temperature in May: 14.8°C
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 in May /
Average sunshine in May
Joetsu, Japan
- Average daylight in May: 14h and 12min
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 May: 9h and 36min
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 in May
Joetsu, Japan
- Average sunshine days in May: 15.1 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 in May
Joetsu, Japan
- Average UV index in May: 4
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 in May
Joetsu, Japan
- Average cloud cover in May: 35
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 in May
Joetsu, Japan
- Average visibility in May: 9km
The months with the highest visibility are October and November (10km).
The month with the lowest visibility is January (8km).
