January weather forecast
Hachioji, Japan

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Weather in January

The chilly period of the year in Hachioji, Japan begins in January with average day temperatures around 8.5°C (47.3°F). During this period, locals and tourists can expect cooler nights, while the coat-clad daytime offers a moderate relief from the cold. It is important to pack warm, as snowfall is anticipated during this month. Notable fluctuation between temperatures at day and night is experienced during this period. Humidity and atmospheric pressure are quite stable, making the overall weather rather predictable for those planning a visit.

Temperature

January, marked by an average high-temperature of 8.5°C (47.3°F) and a low-temperature of 2°C (35.6°F), is the coldest month.

Humidity

January is the least humid month, with an average relative humidity of 59%.

Rainfall

In Hachioji, in January, it is raining for 4.1 days, with typically 23mm (0.91") of accumulated precipitation. In Hachioji, during the entire year, the rain falls for 138 days and collects up to 580mm (22.83") of precipitation.

Snowfall

Months with snowfall in Hachioji, Japan, are January through March and November. January is the first month it typically snows. Throughout January, in the average 0.6 snowfall days, it receives 8mm (0.31") of snow. In Hachioji, during the entire year, snow falls for 2.8 days and aggregates up to 47mm (1.85") of snow.

Daylight

In January, the average length of the day in Hachioji is 10h and 4min.
On the first day of the month, sunrise is at 06:52 and sunset at 16:39. On the last day of January, in Hachioji, Japan, sunrise is at 06:43 and sunset at 17:08 JST.

Sunshine

In Hachioji, the average sunshine in January is 6.7h.

UV index

The month with the lowest UV index in Hachioji, Japan, is January, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: During January, 2 as the daily maximum UV index converts into the following advice:
Though extended exposure to the sun typically does not concern most people, it is crucial to always shield children, infants, and those with sensitive skin. Avoiding the Sun during its peak radiation time around midday is a healthy practice. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.

Frequently asked questions

What part of the year is the coldest in Hachioji?

In Hachioji, January is known for its average lowest temperatures, reaching a high of 8.5°C (47.3°F) and a low of 2°C (35.6°F).

What is the temperature in January in Hachioji?

In Hachioji, in January, the average high-temperature is 8.5°C (47.3°F), and the average low-temperature is 2°C (35.6°F).

What is the least humid month in Hachioji?

The least humid month in Hachioji, Japan, is January, with an average relative humidity of 59%.

What is the average humidity in January in Hachioji?

In January, the average relative humidity in Hachioji is 59%.

How many days does it rain in January in Hachioji?

In Hachioji, during January, the rain falls for 4.1 days and regularly aggregates up to 23mm (0.91") of precipitation.

When does it start to snow in Hachioji?

January is the first month it typically snows. Throughout January, in the average 0.6 snowfall days, it receives 8mm (0.31") of snow.

How many hours of daylight does Hachioji have in January?

The average day length in January is 10h and 4min.

What time are sunrise and sunset in January in Hachioji?

On the first day of January in Hachioji, sunrise is at 06:52 and sunset at 16:39. On the last day of the month, sunrise is at 06:43 and sunset at 17:08 JST.

How many hours of sunshine does Hachioji have in January?

The average sunshine duration in January in Hachioji is 6.7h.

When is the lowest UV index in Hachioji?

The month with the lowest UV index in Hachioji, Japan, is January, with an average maximum UV index of 2.

What is the UV index intensity in January in Hachioji?

In January, the average daily maximum UV index in Hachioji, Japan, is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover

Average temperature in January
Hachioji, Japan

Average temperature in January - Hachioji, Japan
  • Average high temperature in January: 8.5°C

The warmest month (with the highest average high temperature) is August (31.9°C).
The month with the lowest average high temperature is January (8.5°C).

  • Average low temperature in January: 2°C

The month with the highest average low temperature is August (24.9°C).
The coldest month (with the lowest average low temperature) is January (2°C).

Average pressure in January
Hachioji, Japan

Average pressure in January - Hachioji, Japan
  • Average pressure in January: 1016.4mbar

The month with the highest atmospheric pressure is November (1018.2mbar).
The month with the lowest atmospheric pressure is June (1009.2mbar).

Average wind speed in January
Hachioji, Japan

Average wind speed in January - Hachioji, Japan
  • Average wind speed in January: 11.8km/h

The windiest month (with the highest average wind speed) is April (12.6km/h).
The calmest month (with the lowest average wind speed) is November (9.7km/h).

Average humidity in January
Hachioji, Japan

Average humidity in January - Hachioji, Japan
  • Average humidity in January: 59%

The month with the highest relative humidity is July (75%).
The month with the lowest relative humidity is January (59%).

Average rainfall in January
Hachioji, Japan

Average rainfall in January - Hachioji, Japan
  • Average rainfall in January: 23mm

The wettest month (with the highest rainfall) is October (79mm).
The driest month (with the least rainfall) is December (19mm).

Average rainfall days in January
Hachioji, Japan

Average rainfall days in January - Hachioji, Japan
  • Average rainfall days in January: 4.1 days

The month with the highest number of rainy days is June (15.7 days).
The month with the least rainy days is January (4.1 days).

Average snowfall in January
Hachioji, Japan

Average snowfall in January - Hachioji, Japan
  • Average snowfall in January: 8mm

The month with the highest snowfall is February (33mm).
The months with the least snowfall are April, May, June, July, August, September, October and December (0mm).

Average snowfall days in January
Hachioji, Japan

Average snowfall days in January - Hachioji, Japan
  • Average snowfall days in January: 0.6 days

The month with the highest number of snowfall days is February (1.8 days).
The months with the least snowfall days are April, May, June, July, August, September, October and December (0 days).

Average daylight in January /
Average sunshine in January
Hachioji, Japan

Average daylight in January / Average sunshine in January - Hachioji, 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 4min

The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 6h and 0min).

Average sunshine days in January
Hachioji, Japan

Average sunshine days in January - Hachioji, Japan
  • Average sunshine days in January: 26 days

The month with the most sunshine days is January (26 days).
The month with the least sunshine days is June (11.9 days).

Average UV index in January
Hachioji, Japan

Average UV index in January - Hachioji, Japan
  • Average UV index in January: 2

The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is January (UV index 2).

Average cloud cover in January
Hachioji, Japan

Average cloud cover in January - Hachioji, Japan
  • Average cloud cover in January: 26

The months with the most cloud cover are June and October (Cloud cover 44).
The month with the least cloud cover is January (Cloud cover 26).

Average visibility in January
Hachioji, Japan

Average visibility in January - Hachioji, Japan
  • Average visibility in January: 10km

The months with the highest visibility are January, February, March, April, May, August, October, November and December (10km).
The months with the lowest visibility are June, July and September (9km).

Hachioji, Japan

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