Nakanojō weather in January

In January, Nakanojō sees average daytime highs of 2°C and overnight lows near -5°C, with 78 mm of precipitation across 14.6 wet days and about 9.8 hours of daylight. It is the 12th-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 2°C through the month. The sky is clear or mostly clear about 22% of the time in January, and the air most often feels dry.

Daylight stretches from about 9 h 30 min at the start of January to 10 h 06 min by month's end. Set against the rest of the year, January is Nakanojō's 3rd-clearest and 1st-windiest month. For the whole year in context, see Nakanojō's year-round climate.

Daytime high
12th warmest
Overnight low
-5°
1st coldest
Precipitation
78 mm
14.6 wet days
Daylight
9 h 48 min
7:01 AM – 4:47 PM
Cloud cover
59%
3rd clearest
Wind
9 km/h
1st windiest
Solar energy
2.8 kWh/m²
Travel score
0.0
out of 10

Nakanojō is town in Agatsuma District, Gunma Prefecture, Japan.

Density
35/km²
people per km²
Founded
1889

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 2°C through the month.

A typical January day in Nakanojō reaches about 2°C in the afternoon and slips back to -5°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between -2°C and 6°C. Set against its neighbours, January runs about 3°C cooler than December and about 1°C cooler than February.

-10°-5°10°151015202531
Avg high (°C)Avg low (°C)
13-4
23-4
33-4
43-4
53-4
62-4
72-5
82-5
92-5
102-5
112-5
122-5
132-5
142-5
152-5
162-5
172-5
182-5
192-5
202-5
212-5
222-5
232-6
242-6
252-6
262-6
272-6
282-6
292-6
302-6
312-6

How January really feels in Nakanojō

Once humidity and wind are folded in, January averages 0 days that feel above 32°C and 31 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
31
wind chill below the day's low

The story in January is cold — wind chill drags the overnight "feels like" below the raw low.

Nakanojō weather by month

How January compares with the rest of the year at a glance. January is the 12th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -5°7814.616.49.80.0
Feb / -5°7413.51410.60.0
Mar / -2°11515.611.811.70.8
Apr13° / 121153.412.93.2
May18° / 10°16016.80.313.94.9
Jun21° / 14°22722014.54.4
Jul25° / 18°27324.2014.24.4
Aug26° / 19°21623.5013.44.6
Sep22° / 15°21519.7012.24.9
Oct16° / 17815.60.211.14.5
Nov11° / 7811.63.5102.5
Dec / -2°6713.512.49.50.2

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 22% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 31% of January, with mostly cloudy or overcast conditions the remaining 47%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15842
25842
35743
45743
55842
65743
75644
85644
95545
105446
115347
125248
135248
145149
155050
165050
175050
184951
194951
204951
214951
225050
235149
245149
255248
265248
275248
285347
295347
305446
315446

Chance of precipitation in January

Any precipitationSnow

Nakanojō gets around 78 mm of rain and snow over 14.6 wet days in January. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 47% and peaks near 48% on the wettest days, and about 16 days bring snow.

0%20%40%60%151015202531
Rain chance (%)Snow chance (%)
14652
24652
34652
44652
54652
64652
74652
84652
94652
104651
114751
124751
134751
144751
154751
164751
174752
184852
194852
204853
214853
224854
234854
244855
254855
264855
274855
284855
294855
304855
314854

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

Most of January feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, January lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)
1100
2100
3100
4100
5100
6100
7100
8100
9100
10100
11100
12100
13100
14100
15100
16100
17100
18100
19100
20100
21100
22100
23100
24100
25100
26100
27100
28100
29100
30100
31100

Wind in January

Winds average 9 km/h in January, the windiest month of the year.

Across January, daily wind ranges from about 9 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm
319calm

Sunrise & sunset in January

DaylightNight

Daylight runs from about 9 h 30 min at the start of January to 10 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 36 minutes over January. Sunrise moves from 7:02 AM to 6:54 AM, and sunset from 4:34 PM to 5:02 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.57:024:34
29.57:024:35
39.67:024:35
49.67:024:36
59.67:024:37
69.67:024:38
79.67:024:39
89.67:024:39
99.67:024:40
109.67:024:41
119.77:024:42
129.77:024:43
139.77:024:44
149.77:024:45
159.77:014:46
169.87:014:47
179.87:014:48
189.87:014:49
199.87:004:50
209.87:004:51
219.97:004:52
229.96:594:53
239.96:594:54
249.96:584:55
2510.06:584:56
2610.06:574:57
2710.06:574:58
2810.06:564:59
2910.16:555:00
3010.16:555:01
3110.16:545:02

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 2.8 kWh/m².

For context, solar energy here swings from a low near 2.38 kWh/m² to a high of 5.53 kWh/m² in May across the year — January's 2.8 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
12.6Moderate
22.6Moderate
32.6Moderate
42.6Moderate
52.6Moderate
62.6Moderate
72.6Moderate
82.6Moderate
92.6Moderate
102.6Moderate
112.7Moderate
122.7Moderate
132.7Moderate
142.7Moderate
152.7Moderate
162.7Moderate
172.8Moderate
182.8Moderate
192.8Moderate
202.8Moderate
212.9Moderate
222.9Moderate
232.9Moderate
242.9Moderate
253.0Moderate
263.0Moderate
273.0Moderate
283.1Moderate
293.1Moderate
303.1Moderate
313.2Moderate
Planning a trip in January

Hazard calendar for Nakanojō

In seasonPeak

None of Nakanojō's seasonal hazards are active in January. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Nakanojō's rainy season runs May–October, when most of the year's rain falls.

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

Is January a good time to visit Nakanojō?

Our two travel scores rate January for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

0.0
Sightseeing
11th-best month of the year
0.0
Beach & pool
9th-best month of the year

January is a weaker month for outdoor sightseeing in Nakanojō.

What to pack for Nakanojō in January

From January's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In January, Nakanojō sees daytime highs around 2°C and nights near -5°C. Pack a warm layer, a heavy coat and rain gear. About 15 days see rain.

a warm layera heavy coatrain gear

UV index in Nakanojō in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 2. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Nakanojō peaks around July 18 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateJul 18UV 10Dec 23UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar6High
Apr7High
May8Very high
Jun9Very high
Jul10Very high
Aug9Very high
Sep9Very high
Oct6High
Nov3Moderate
Dec2Moderate

Air quality in Nakanojō in January

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where January falls, not just the annual average.

Air quality in Nakanojō is worst in April — around 21 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (December, 10 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1821 µg/m³Dec 1610 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb14Moderate
Mar19Moderate
Apr21Moderate
May20Moderate
Jun18Moderate
Jul15Moderate
Aug13Moderate
Sep12Good
Oct12Good
Nov11Good
Dec10Good
Location & terrain

Where is Nakanojō?

Nakanojō sits at 36.6°N, 138.8°E, 371 m above sea level, in Japan. The nearest listed city is Minakami, 17 km away.

Topography around Nakanojō

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Nakanojō.

Within 3 km, the terrain around Nakanojō has significant variations in elevation — a maximum elevation change of 454 m around an average of 421 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,443 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,852 m.

The land around Nakanojō is covered by trees (61%) within 3 km, trees (89%) within 16 km, and trees (81%) within 80 km.

3 km
454 m
16 km
1,443 m
80 km
2,852 m
treesgrasslandcroplandartificial surfaceswater
January weather nearby: Minakami 17 km · Shibukawa 18 km · Numata 19 km · Ogura 20 km · Kanekomachi 24 km · Annaka 29 km · Maebashi 30 km · Karuizawa 32 km

Japan travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type A / B
100 V · 50 / 60 Hz
Prices
≈ 65% of US
price level, 2025
GDP per capita
$35,951
2025
Happiness
6.1 / 10
World Happiness, 2025
Safe drinking water
99%
of population, 2024
Homicide rate
0.2
per 100k, 2023
Road deaths
3.6
per 100k/yr, 2019
Income group
High
World Bank
English
Very low
EF EPI 446
Religion
Shintoism 49%Buddhism 46%other 4%Christianity 1%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Nakanojō (36.5872°, 138.8408°, elevation 371 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).