January weather forecastHiroshima, Japan
January
Weather in January
In Hiroshima, January sees frozen soil as snowfall reaches up to 50mm (1.97") over around 9 days. When compared to February, temperatures ride the low end of the thermometer, amplifying icy conditions. It is particularly chilly in the mornings with frosts a common sight. Hiroshima's weather in January is marked by short daylight hours, with the sun not staying around too long. The chilly weather couples with the dampness resulting from the rain, which comes strong and frequent.Temperature
Hiroshima's January weather, with an average high temperature of 9.7°C (49.5°F) and an average low temperature of 1.7°C (35.1°F), tends to be the coldest of the year.Humidity
In January, the average relative humidity is 68%.Rainfall
In Hiroshima, in January, during 19 rainfall days, 45mm (1.77") of precipitation is typically accumulated. Throughout the year, there are 190 rainfall days, and 1538mm (60.55") of precipitation is accumulated.Snowfall
Months with snowfall are January through March and December. The month with the most snowfall in Hiroshima is January, when snow falls for 8.7 days and typically aggregates up to 50mm (1.97") of snow.Sea temperature
In Hiroshima, in January, the average water temperature is 14.3°C (57.7°F).Note: Entering waters of 14.3°C (57.7°F) is life-endangering. A mere moment in 13°C (55.4°F) waters feels piercing cold, and below 10°C (50°F) it can lead to immediate cold shock and cessation of breathing control, depending on body resilience.
Daylight
The average length of the day in January in Hiroshima is 10h and 9min.On the first day of January, sunrise is at 07:16 and sunset at 17:10. On the last day of the month, sunrise is at 07:09 and sunset at 17:37 JST.
Sunshine
With an average of 4.4h of sunshine, January has the least sunshine of the year in Hiroshima.UV index
The months with the lowest UV index in Hiroshima are January and December, with an average maximum UV index of 3. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: The daily maximum UV index of 3 in January interprets into the following advice:
Be vigilant - A duty to shield skin and eyes from injury exists. The Sun's radiation is especially intense around midday; try to stay in shade during this period. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. Notice! The UV radiation of the Sun can be intensified nearly twofold due to the reflective quality of snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in January
Hiroshima, Japan
- Average high temperature in January: 9.7°C
The warmest month (with the highest average high temperature) is August (32.5°C).
The month with the lowest average high temperature is January (9.7°C).
- Average low temperature in January: 1.7°C
The month with the highest average low temperature is August (24.8°C).
The coldest month (with the lowest average low temperature) is January (1.7°C).
Average humidity in January
Hiroshima, Japan
- Average humidity in January: 68%
The month with the highest relative humidity is July (74%).
The month with the lowest relative humidity is April (63%).
Average rainfall in January
Hiroshima, Japan
- Average rainfall in January: 44.6mm
The wettest month (with the highest rainfall) is July (258.6mm).
The driest month (with the least rainfall) is December (41.2mm).
Average rainfall days in January
Hiroshima, Japan
- Average rainfall days in January: 19 days
The month with the highest number of rainy days is January (19 days).
The month with the least rainy days is October (12 days).
Average snowfall in January
Hiroshima, Japan
- Average snowfall in January: 50mm
The month with the highest snowfall is January (50mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).
Average snowfall days in January
Hiroshima, Japan
- Average snowfall days in January: 8.7 days
The month with the highest number of snowfall days is January (8.7 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average sea temperature in January
Hiroshima, Japan
- Average sea temperature in January: 14.3°C
The best month for swimming (with the highest average sea temperature) is August (26.8°C).
The coldest month (with the lowest average sea temperature) is February (12.4°C).
Average daylight in January /
Average sunshine in January
Hiroshima, Japan
- Average daylight in January: 10h and 12min
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: 4h and 24min
The month with the most sunshine is August (Average sunshine: 6h and 48min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average UV index in January
Hiroshima, Japan
- Average UV index in January: 3
The month with the highest UV index is July (UV index 11).
The months with the lowest UV index are January and December (UV index 3).
