Imaichi weather in January

In January, Imaichi sees average daytime highs of 4°C and overnight lows near -3°C, with 61 mm of precipitation across 8.5 wet days and about 9.8 hours of daylight. It is the 12th-warmest and 10th-wettest month of the year here.

Day-to-day highs hold fairly steady near 4°C through the month. The sky is clear or mostly clear about 34% 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 Imaichi's 2nd-clearest and 3rd-windiest month. For the whole year in context, see Imaichi's year-round climate.

Daytime high
12th warmest
Overnight low
-3°
1st coldest
Precipitation
61 mm
8.5 wet days
Daylight
9 h 42 min
6:58 AM – 4:43 PM
Cloud cover
52%
2nd clearest
Wind
7 km/h
3rd windiest
Solar energy
2.73 kWh/m²
Travel score
0.0
out of 10

Imaichi is human settlement in Japan.

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 4°C through the month.

A typical January day in Imaichi reaches about 4°C in the afternoon and slips back to -3°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 0°C and 8°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)
15-2
25-2
35-2
45-2
55-2
64-3
74-3
84-3
94-3
104-3
114-3
124-3
134-3
144-3
154-3
164-3
174-3
184-3
194-3
204-3
214-3
224-3
234-3
244-3
254-3
264-3
274-3
284-3
294-3
304-3
314-3

How January really feels in Imaichi

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.

Imaichi weather by month

How January compares with the rest of the year at a glance. January is the 12th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -3°618.58.39.80.0
Feb / -3°598.97.110.60.1
Mar / -0°12214.27.611.71.5
Apr14° / 15215.12.112.93.7
May19° / 10°19717.40.113.95.0
Jun22° / 15°25521.8014.54.5
Jul26° / 19°34325.8014.34.2
Aug27° / 20°28523.9013.44.4
Sep23° / 17°29020.3012.24.9
Oct18° / 10°22017.50.111.14.7
Nov12° / 95100.4103.3
Dec / -1°6195.19.50.8

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 34% 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 34%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17030
27030
37030
47030
57030
67030
77030
87030
96931
106931
116733
126733
136634
146535
156535
166337
176337
186337
196337
206238
216238
226238
236238
246337
256337
266337
276436
286436
296436
306535
316535

Chance of precipitation in January

Any precipitationSnow

Imaichi gets around 61 mm of rain and snow over 8.5 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 28% and peaks near 30% on the wettest days, and about 8 days bring snow.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
12625
22625
32626
42626
52626
62626
72626
82626
92727
102727
112827
122827
132927
142927
152927
163027
173027
183027
192927
202927
212927
222927
232927
242927
252927
262927
272927
282826
292826
302826
312825

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 6:59 AM to 6:51 AM, and sunset from 4:30 PM to 4:58 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.56:594:30
29.56:594:31
39.56:594:32
49.66:594:32
59.66:594:33
69.66:594:34
79.66:594:35
89.66:594:36
99.66:594:37
109.66:594:37
119.76:594:38
129.76:594:39
139.76:594:40
149.76:594:41
159.76:584:42
169.76:584:43
179.86:584:44
189.86:584:45
199.86:574:46
209.86:574:47
219.96:574:48
229.96:564:49
239.96:564:50
249.96:554:51
2510.06:554:52
2610.06:544:53
2710.06:544:54
2810.06:534:55
2910.16:524:56
3010.16:524:57
3110.16:514:58

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 2.73 kWh/m².

For context, solar energy here swings from a low near 2.29 kWh/m² to a high of 5.18 kWh/m² in May across the year — January's 2.73 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
12.5Moderate
22.5Moderate
32.5Moderate
42.5Moderate
52.5Moderate
62.6Moderate
72.6Moderate
82.6Moderate
92.6Moderate
102.6Moderate
112.6Moderate
122.6Moderate
132.6Moderate
142.6Moderate
152.6Moderate
162.7Moderate
172.7Moderate
182.7Moderate
192.7Moderate
202.8Moderate
212.8Moderate
222.8Moderate
232.8Moderate
242.9Moderate
252.9Moderate
262.9Moderate
272.9Moderate
283.0Moderate
293.0Moderate
303.0Moderate
313.1Moderate
Planning a trip in January

Hazard calendar for Imaichi

In seasonPeak

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

Imaichi'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 Imaichi?

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

0.0
Sightseeing
12th-best month of the year
0.0
Beach & pool
9th-best month of the year

January is a weaker month for outdoor sightseeing in Imaichi.

What to pack for Imaichi in January

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

In January, Imaichi sees daytime highs around 4°C and nights near -3°C. Pack a warm layer. Worth having: a heavy coat and rain gear. About 9 days see rain.

a warm layera heavy coatrain gear

UV index in Imaichi 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 Imaichi peaks around July 18 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 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 10Jan 1UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar5High
Apr7High
May9Very high
Jun9Very high
Jul10Very high
Aug9Very high
Sep9Very high
Oct6High
Nov3Moderate
Dec2Moderate

Air quality in Imaichi 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 Imaichi is worst in April — around 21 µg/m³ PM2.5 (moderate), about 2.3× the cleanest month (December, 9 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1721 µg/m³Dec 179 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb13Moderate
Mar19Moderate
Apr21Moderate
May20Moderate
Jun16Moderate
Jul14Moderate
Aug13Moderate
Sep11Good
Oct11Good
Nov10Good
Dec9Good
Location & terrain

Where is Imaichi?

Imaichi sits at 36.7°N, 139.7°E, 391 m above sea level, in Japan. The nearest listed city is Nikko, 7.0 km away.

Topography around Imaichi

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

Within 3 km, the terrain around Imaichi has significant variations in elevation — a maximum elevation change of 342 m around an average of 421 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 2,085 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,551 m.

The land around Imaichi is covered by trees (61%) within 3 km, trees (82%) within 16 km, and trees (70%) within 80 km.

3 km
342 m
16 km
2,085 m
80 km
2,551 m
treesgrasslandcroplandartificial surfaceswater
January weather nearby: Nikko 7.0 km · Kanuma 19 km · Yaita 24 km · Utsunomiya 24 km · Ujiie 26 km · Sakura 27 km · Hōshakuji 28 km · Mibu 35 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 Imaichi (36.7167°, 139.6833°, elevation 391 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).