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
Koyasu's January weather, with an average high temperature of 9.8°C (49.6°F) and an average low temperature of 5.3°C (41.5°F), tends to be the coldest of the year.Humidity
With an average relative humidity of 61%, January is the least humid month in Koyasu.Rainfall
In Koyasu, during January, the rain falls for 6.5 days and regularly aggregates up to 43mm (1.69") of precipitation. Throughout the year, there are 151.7 rainfall days, and 886mm (34.88") of precipitation is accumulated.Snowfall
Months with snowfall in Koyasu, Japan, are January through March. January is the first month it typically snows. Throughout January, in the average 0.1 snowfall days, it receives 6mm (0.24") of snow. Throughout the year, there are 0.7 snowfall days, and 17mm (0.67") of snow is accumulated.Daylight
In January, the average length of the day is 10h and 4min.On the first day of the month, sunrise is at 06:51 and sunset at 16:40. On the last day of January, in Koyasu, sunrise is at 06:43 and sunset at 17:08 JST.
Sunshine
In Koyasu, the average sunshine in January is 6.4h.UV index
The months with the lowest UV index in Koyasu are January, February and December, with an average maximum UV index of 3. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for average individuals.Note: In January, an average UV index of 3 transforms into the following instructions:
Exercise prevention - Warding off sunburn is urged. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest time of year in Koyasu?
What are January temperatures in Koyasu?
What is the least humid month in Koyasu?
What is the average humidity in January in Koyasu?
How many days does it rain in January in Koyasu?
When does it start to snow in Koyasu?
How many hours of daylight does Koyasu have in January?
What time are sunrise and sunset in January in Koyasu?
How many hours of sunshine does Koyasu have in January?
What is the month with the lowest UV index in Koyasu?
What is the UV index reading in January in Koyasu?
Average temperature in January
Koyasu, Japan
- Average high temperature in January: 9.8°C
The warmest month (with the highest average high temperature) is August (28.8°C).
The month with the lowest average high temperature is January (9.8°C).
- Average low temperature in January: 5.3°C
The month with the highest average low temperature is August (25.3°C).
The coldest month (with the lowest average low temperature) is January (5.3°C).
Average pressure in January
Koyasu, Japan
- Average pressure in January: 1016.1mbar
The month with the highest atmospheric pressure is November (1017.9mbar).
The month with the lowest atmospheric pressure is June (1009.1mbar).
Average wind speed in January
Koyasu, Japan
- Average wind speed in January: 19km/h
The windiest month (with the highest average wind speed) is March (20.8km/h).
The calmest month (with the lowest average wind speed) is June (15.9km/h).
Average humidity in January
Koyasu, Japan
- Average humidity in January: 61%
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is January (61%).
Average rainfall in January
Koyasu, Japan
- Average rainfall in January: 43mm
The wettest month (with the highest rainfall) is September (125mm).
The driest months (with the least rainfall) are February and December (39mm).
Average rainfall days in January
Koyasu, Japan
- Average rainfall days in January: 6.5 days
The month with the highest number of rainy days is June (16.5 days).
The month with the least rainy days is January (6.5 days).
Average snowfall in January
Koyasu, Japan
- Average snowfall in January: 6mm
The month with the highest snowfall is February (10mm).
The months with the least snowfall are April, May, June, July, August, September, October, November and December (0mm).
Average snowfall days in January
Koyasu, Japan
- Average snowfall days in January: 0.1 days
The month with the highest number of snowfall days is February (0.5 days).
The months with the least snowfall days are April, May, June, July, August, September, October, November and December (0 days).
Average daylight in January /
Average sunshine in January
Koyasu, Japan
- Average daylight in January: 10h and 1min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in January: 6h and 2min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 5h and 30min).
Average sunshine days in January
Koyasu, Japan
- Average sunshine days in January: 23.2 days
The month with the most sunshine days is January (23.2 days).
The month with the least sunshine days is September (11.2 days).
Average UV index in January
Koyasu, Japan
- Average UV index in January: 3
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 3).
Average cloud cover in January
Koyasu, Japan
- Average cloud cover in January: 30
The months with the most cloud cover are March, June and October (Cloud cover 43).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in January
Koyasu, Japan
- Average visibility in January: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
