Nanto-shi weather in January

In January, Nanto-shi sees average daytime highs of 3°C and overnight lows near -4°C, with 230 mm of precipitation across 24.2 wet days and about 9.8 hours of daylight. It is the 12th-warmest and 6th-wettest month of the year here.

Day-to-day highs hold fairly steady near 3°C through the month. The sky is clear or mostly clear about 7% 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 Nanto-shi's 10th-clearest and 5th-windiest month. For the whole year in context, see Nanto-shi's year-round climate.

Daytime high
12th warmest
Overnight low
-4°
1st coldest
Precipitation
230 mm
24.2 wet days
Daylight
9 h 48 min
7:09 AM – 4:54 PM
Cloud cover
75%
10th clearest
Wind
7 km/h
5th windiest
Solar energy
2.37 kWh/m²
Travel score
0.0
out of 10

Nanto-shi is city in Toyama Prefecture, Japan.

Density
72/km²
people per km²
Founded
2004

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 3°C through the month.

A typical January day in Nanto-shi reaches about 3°C in the afternoon and slips back to -4°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between -1°C and 7°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)
14-4
24-4
34-4
43-4
53-4
63-4
73-4
83-4
93-4
103-4
113-4
123-4
133-4
143-4
153-4
163-4
173-4
183-4
193-4
203-4
213-4
223-4
233-4
243-4
253-4
263-4
273-4
283-4
293-4
303-4
313-4

How January really feels in Nanto-shi

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.

Nanto-shi weather by month

How January compares with the rest of the year at a glance. January is the 12th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -4°23024.222.19.80.0
Feb / -4°17920.217.610.60.0
Mar / -1°20720.212.911.71.2
Apr15° / 17515.83.212.93.9
May21° / 10°18615.40.113.95.6
Jun24° / 16°24718.1014.45.3
Jul28° / 20°33221.7014.24.4
Aug29° / 21°24920.4013.44.3
Sep24° / 16°28918.5012.25.2
Oct19° / 10°223170.211.15.0
Nov13° / 19918.44.310.12.7
Dec / -2°23722.816.39.50.4

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 7% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 13% of January, with mostly cloudy or overcast conditions the remaining 80%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12377
22377
32278
42278
52278
62278
72278
82278
92179
102179
112179
122179
132080
142080
151981
161981
171882
181882
191882
201882
211882
221882
231783
241783
251783
261783
271783
281882
291981
301981
312080

Chance of precipitation in January

Any precipitationSnow

Nanto-shi gets around 230 mm of rain and snow over 24.2 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 78% and peaks near 80% on the wettest days, and about 22 days bring snow.

0%20%40%60%80%151015202531
Rain chance (%)Snow chance (%)
17767
27767
37768
47768
57769
67769
77769
87668
97668
107668
117668
127668
137668
147669
157669
167669
177670
187770
197771
207771
217872
227973
237974
248074
258075
268075
278075
288075
298074
308074
318074

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 7 km/h in January.

Across January, daily wind ranges from about 7 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

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 7:09 AM to 7:02 AM, and sunset from 4:42 PM to 5:10 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.57:094:42
29.67:094:42
39.67:104:43
49.67:104:44
59.67:104:45
69.67:104:46
79.67:104:46
89.67:104:47
99.67:104:48
109.77:104:49
119.77:104:50
129.77:104:51
139.77:104:52
149.77:094:53
159.77:094:53
169.87:094:54
179.87:094:55
189.87:084:56
199.87:084:57
209.87:084:58
219.97:074:59
229.97:075:00
239.97:065:01
249.97:065:02
2510.07:055:03
2610.07:055:04
2710.07:045:05
2810.07:045:06
2910.17:035:07
3010.17:025:09
3110.17:025:10

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 2.37 kWh/m².

For context, solar energy here swings from a low near 2.02 kWh/m² to a high of 5.66 kWh/m² in May across the year — January's 2.37 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.1Moderate
22.1Moderate
32.2Moderate
42.2Moderate
52.2Moderate
62.2Moderate
72.2Moderate
82.2Moderate
92.2Moderate
102.2Moderate
112.2Moderate
122.3Moderate
132.3Moderate
142.3Moderate
152.3Moderate
162.3Moderate
172.4Moderate
182.4Moderate
192.4Moderate
202.4Moderate
212.5Moderate
222.5Moderate
232.5Moderate
242.5Moderate
252.6Moderate
262.6Moderate
272.6Moderate
282.7Moderate
292.7Moderate
302.7Moderate
312.8Moderate
Planning a trip in January

Hazard calendar for Nanto-shi

In seasonPeak

In January, Nanto-shi sits inside its pacific typhoon season. The full year is below, with each hazard's peak months called out.

Nanto-shi sits in the Pacific typhoon belt; the season peaks July–October.

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

Is January a good time to visit Nanto-shi?

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 Nanto-shi.

What to pack for Nanto-shi in January

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

In January, Nanto-shi sees daytime highs around 3°C and nights near -4°C. Pack a warm layer, a heavy coat and rain gear. About 24 days see rain.

a warm layera heavy coatrain gear

Sea temperature near Nanto-shi in January

The nearest coast averages about 13°C in January — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 26 km away) is warmest in August at about 27°C and coldest in March near 11°C.

It's comfortable for a long swim from Jun 17 to Nov 3 — about 4.6 months when the water holds above 20°C.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan13Bracing
Feb11Bracing
Mar11Bracing
Apr12Bracing
May16Cool
Jun20Cool
Jul24Refreshing
Aug27Warm
Sep25Warm
Oct22Refreshing
Nov19Cool
Dec16Cool

UV index in Nanto-shi in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 3. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Nanto-shi peaks around July 20 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 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 20UV 10Dec 21UV 2
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5Moderate
Apr7High
May9Very high
Jun10Very high
Jul10Very high
Aug10Very high
Sep9Very high
Oct6High
Nov3Moderate
Dec2Moderate

Air quality in Nanto-shi 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 Nanto-shi is worst in April — around 21 µg/m³ PM2.5 (moderate), about 2.4× the cleanest month (December, 9 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1621 µg/m³Dec 139 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb13Moderate
Mar20Moderate
Apr21Moderate
May20Moderate
Jun18Moderate
Jul14Moderate
Aug12Good
Sep10Good
Oct10Good
Nov10Good
Dec9Good
Location & terrain

Where is Nanto-shi?

Nanto-shi sits at 36.6°N, 136.9°E, 70 m above sea level, in Japan. The nearest listed city is Fukumitsu, 4.0 km away.

Topography around Nanto-shi

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

Within 3 km, the terrain around Nanto-shi has only modest variations in elevation — a maximum elevation change of 62 m around an average of 72 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,138 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,132 m.

The land around Nanto-shi is covered by cropland (72%) and artificial surfaces (20%) within 3 km, trees (63%) and cropland (25%) within 16 km, and trees (57%) and water (30%) within 80 km.

3 km
62 m
16 km
1,138 m
80 km
3,132 m
treesgrasslandcroplandartificial surfaceswater
January weather nearby: Fukumitsu 4.0 km · Tonami 6.0 km · Nanto 6.0 km · Oyabe 12 km · Tsubata 19 km · Yatsuomachi-higashikumisaka 20 km · Takaoka 22 km · Mukai-awagasaki 25 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 Nanto-shi (36.5692°, 136.9116°, elevation 70 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).