Contents
- Weather in January
- Frequently asked questions
- Average temperature in January
- Average pressure in January
- Average wind speed in January
- Average humidity in January
- Average rainfall in January
- Average rainfall days in January
- Average snowfall in January
- Average snowfall days in January
- Average daylight in January
- Average sunshine in January
- Average sunshine days in January
- Average UV index in January
- Average cloud cover in January
- Average visibility in January
January
Weather in January
Temperature
With average high temperatures of 6.7°C (44.1°F) and lows of 0.1°C (32.2°F), January is the coldest month.Humidity
The average relative humidity in January is 77%.Rainfall
January is the month with the least rainfall. Rain falls for 15.3 days and accumulates 56mm (2.2") of precipitation.Snowfall
January through April and December are months with snowfall in Koyasan. The month with the most snowfall is January, when snow falls for 11.1 days and typically aggregates up to 90mm (3.54") of snow.Daylight
The average length of the day in January is 10h and 10min.On the first day of January, sunrise is at 07:03 and sunset at 16:58. On the last day of the month, sunrise is at 06:56 and sunset at 17:25 JST.
Sunshine
January and February, with an average of 5.2h of sunshine, are months with the least sunshine in Koyasan, Japan.UV index
January, February and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: An average UV index of 2 in January transforms into this advice:
Children, infants, and individuals with sensitive skin should be constantly protected from extended sun exposure. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What time of the year is the coldest in Koyasan?
How cold is January in Koyasan?
What is the average humidity in January in Koyasan?
What is the driest month in Koyasan?
How many days does it rain in January in Koyasan?
What is the snowiest month in Koyasan?
How many days does it snow in January in Koyasan?
What is the average length of the day in January in Koyasan?
When are sunrise and sunset in January in Koyasan?
What is the month with the least sunshine in Koyasan?
How many hours of sunshine does Koyasan have in January?
When is the lowest UV index in Koyasan?
What is the UV index intensity in January in Koyasan?
Average temperature in January
Koyasan, Japan
- Average high temperature in January: 6.7°C
The warmest month (with the highest average high temperature) is August (29.9°C).
The month with the lowest average high temperature is January (6.7°C).
- Average low temperature in January: 0.1°C
The month with the highest average low temperature is August (22.3°C).
The coldest month (with the lowest average low temperature) is January (0.1°C).
Average pressure in January
Koyasan, Japan
- Average pressure in January: 1019.4mbar
The month with the highest atmospheric pressure is February (1019.5mbar).
The month with the lowest atmospheric pressure is June (1008.8mbar).
Average wind speed in January
Koyasan, Japan
- Average wind speed in January: 9.5km/h
The windiest month (with the highest average wind speed) is January (9.5km/h).
The calmest months (with the lowest average wind speed) are June and August (6.2km/h).
Average humidity in January
Koyasan, Japan
- Average humidity in January: 77%
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is May (74%).
Average rainfall in January
Koyasan, Japan
- Average rainfall in January: 56mm
The wettest month (with the highest rainfall) is July (179mm).
The driest month (with the least rainfall) is January (56mm).
Average rainfall days in January
Koyasan, Japan
- Average rainfall days in January: 15.3 days
The month with the highest number of rainy days is July (21.1 days).
The month with the least rainy days is February (13.8 days).
Average snowfall in January
Koyasan, Japan
- Average snowfall in January: 90mm
The month with the highest snowfall is January (90mm).
The months with the least snowfall are May, June, July, August, September, October and November (0mm).
Average snowfall days in January
Koyasan, Japan
- Average snowfall days in January: 11.1 days
The month with the highest number of snowfall days is January (11.1 days).
The months with the least snowfall days are May, June, July, August, September, October and November (0 days).
Average daylight in January /
Average sunshine in January
Koyasan, Japan
- Average daylight in January: 10h and 1min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in January: 5h and 1min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The months with the least sunshine are January and February (Average sunshine: 5h and 12min).
Average sunshine days in January
Koyasan, Japan
- Average sunshine days in January: 9.6 days
The month with the most sunshine days is May (14.3 days).
The month with the least sunshine days is July (7.9 days).
Average UV index in January
Koyasan, Japan
- Average UV index in January: 2
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in January
Koyasan, Japan
- Average cloud cover in January: 46
The month with the most cloud cover is January (Cloud cover 46).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in January
Koyasan, Japan
- Average visibility in January: 9km
The months with the highest visibility are January, February, March, April, May, August, September, October, November and December (9km).
The months with the lowest visibility are June and July (8km).
