Gunma Weather in January

Average temperatures, rainfall, sunshine and the best places to visit in Gunma, Japan in January.

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Minakami Kusatsu Shibukawa Takasaki

Planning a getaway to Gunma, Japan this January and curious about the weather you should prepare for? Discover all the vital details you need on this page, solving your puzzle:

What to Expect in Gunma in January

Gunma, Japan is a region in Japan. January in Gunma generally has temperatures that range from very cold to cold, with precipitation levels ranging from moderate to high. January is a winter month.

Temperatures

Based on our climate data spanning from 1990-2020, the average maximum temperature is very cold in Katashina at 1°C (34°F) to cold in Ota at 9°C (48°F). Nighttime temperatures generally drop to -1°C (30°F) in Ota and -7°C (19°F) in Katashina. In general, this month stands out as the coldest period throughout the year. Given the lower temperatures, it's essential to be well-prepared. Packing the right winter clothing and necessary accessories can make a significant difference in ensuring your comfort and well-being during this chilly season.

To explore the conditions in Gunma, Japan in more detail, check the map below.

Precipitation

In January, precipitation varies across different areas. From moderate snow/rainfall in Ota with an average of 59 mm (2.3 in) to high snow/rainfall in Kusatsu with 114 mm (4.5 in).

Average sunshine

Many locations offer abundant sunshine during this month. For instance, Minakami enjoys approximately 192 hours of sunlight, ideal for those seeking sunny weather.

Explore Gunma by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Best Places to Visit in Gunma in January

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Gunma.

Conditions Temperatures Precipitation
perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

Popular Destinations in Gunma

What is the weather like in January for some of the most popular destinations in Gunma, Japan?

Temperature range in Gunma (January)

Precipitation variation in Gunma (January)

Minakami

In January Minakami generally has low temperatures with maximum daytime temperatures around 3°C (37°F), minimum nighttime temperatures around -5°C (23°F) and high monthly snow/rainfall. So on average the conditions are poor that month.

« December
January
February »
December
January
February
Max temperature
6°C (43°F)
3°C (37°F)
4°C (39°F)
Min temperature
-2°C (28°F)
-5°C (23°F)
-5°C (23°F)
Monthly sun hours
186 hours
192 hours
177 hours
Monthly snow/rainfall
95 mm (3.7 in)
109 mm (4.3 in)
108 mm (4.3 in)
Monthly rainy days
17 days
19 days
18 days
Weather conditions
poor
poor
poor
Climate in Minakami →

Kusatsu

In January Kusatsu generally has low temperatures with maximum daytime temperatures around 2°C (36°F), minimum nighttime temperatures around -6°C (21°F) and high monthly snow/rainfall. So on average the conditions are poor that month.

« December
January
February »
December
January
February
Max temperature
5°C (41°F)
2°C (36°F)
3°C (37°F)
Min temperature
-3°C (27°F)
-6°C (21°F)
-6°C (21°F)
Monthly sun hours
137 hours
128 hours
130 hours
Monthly snow/rainfall
101 mm (4 in)
114 mm (4.5 in)
112 mm (4.4 in)
Monthly rainy days
19 days
22 days
21 days
Weather conditions
poor
poor
poor
Climate in Kusatsu →

Shibukawa

In January Shibukawa generally has low temperatures with maximum daytime temperatures around 6°C (43°F), minimum nighttime temperatures around -3°C (27°F) and moderate monthly snow/rainfall. So on average the conditions are poor that month.

« December
January
February »
December
January
February
Max temperature
9°C (48°F)
6°C (43°F)
7°C (45°F)
Min temperature
0°C (32°F)
-3°C (27°F)
-3°C (27°F)
Monthly sun hours
186 hours
192 hours
177 hours
Monthly snow/rainfall
69 mm (2.7 in)
81 mm (3.2 in)
88 mm (3.5 in)
Monthly rainy days
13 days
15 days
15 days
Weather conditions
poor
poor
poor
Climate in Shibukawa →

Takasaki

In January Takasaki generally has low temperatures with maximum daytime temperatures around 8°C (46°F), minimum nighttime temperatures around -1°C (30°F) and moderate monthly snow/rainfall. So on average the conditions are poor that month.

« December
January
February »
December
January
February
Max temperature
11°C (52°F)
8°C (46°F)
9°C (48°F)
Min temperature
2°C (36°F)
-1°C (30°F)
-1°C (30°F)
Monthly sun hours
186 hours
192 hours
177 hours
Monthly snow/rainfall
65 mm (2.6 in)
75 mm (3 in)
87 mm (3.4 in)
Monthly rainy days
9 days
10 days
12 days
Weather conditions
unpleasant
poor
poor
Climate in Takasaki →

Tsumagoi

In January Tsumagoi generally has low temperatures with maximum daytime temperatures around 3°C (37°F), minimum nighttime temperatures around -6°C (21°F) and moderate monthly snow/rainfall. So on average the conditions are poor that month.

« December
January
February »
December
January
February
Max temperature
6°C (43°F)
3°C (37°F)
4°C (39°F)
Min temperature
-3°C (27°F)
-6°C (21°F)
-6°C (21°F)
Monthly sun hours
137 hours
128 hours
130 hours
Monthly snow/rainfall
83 mm (3.3 in)
94 mm (3.7 in)
97 mm (3.8 in)
Monthly rainy days
18 days
21 days
20 days
Weather conditions
poor
poor
poor
Climate in Tsumagoi →

Is your destination not in the list? Have a look at all destinations in Gunma, in Japan.

In our records: Japan January extremes

Notable January records observed across cities in Japan in our climate database (1976 – 2026). Historic readings can vary in quality, so treat these as illustrative.

  • In our records, the coldest January daytime high in Japan was -15°C (5°F) in Mount Fuji on January 18, 2004.

Popular cities in January

Day & night temperatures, rainfall and average weather in Gunma in January.

City Weather Day temp Night temp Rainfall
Minakami 3°C (37°F) -5°C (23°F) 109 mm (4.3 in)
Kusatsu 2°C (36°F) -6°C (21°F) 114 mm (4.5 in)
Shibukawa 6°C (43°F) -3°C (27°F) 81 mm (3.2 in)
Takasaki 8°C (46°F) -1°C (30°F) 75 mm (3 in)
Tsumagoi 3°C (37°F) -6°C (21°F) 94 mm (3.7 in)
Nakanojo 3°C (37°F) -5°C (23°F) 103 mm (4.1 in)

Gunma weather in January: frequently asked questions

What is the weather like in Gunma, Japan in January?

Expect poor weather across Gunma, Japan in January. The popular destination of Minakami averages 3°C (37°F) by day and -5°C (23°F) at night during this winter month.

What is the average temperature in Gunma, Japan in January?

In Minakami, the average daytime high in January is 3°C (37°F), while nighttime temperatures drop to around -5°C (23°F).

Does Gunma, Japan get a lot of snow/rain in January?

Gunma, Japan sees substantial snow/rainfall in January. Minakami typically averages about 109 mm (4.3 in), a mix of wet and dry days, but bring an umbrella.

Is January a Good Time to Visit Gunma, Japan?

In our opinion, January may not be the ideal time to visit Gunma, Japan due to the typically poor weather in Minakami.

On average, the best time to visit Gunma, Japan is in May, June and August with generally pleasant weather in Minakami. On the other hand, the weather in January, February, March and December tend to be poor.

Interested in more climate information?

We have much more information about the climate in Gunma.

Weather and climate has detailed information for every country in the world. Are you going to Japan? Get detailed historical weather averages for many cities in Japan.

Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.

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