Ōtsuki weather in January

In January, Ōtsuki sees average daytime highs of 6°C and overnight lows near -3°C, with 81 mm of precipitation across 8.8 wet days and about 9.9 hours of daylight. It is the 12th-warmest and 11th-wettest month of the year here.

Day-to-day highs hold fairly steady near 6°C through the month. The sky is clear or mostly clear about 54% of the time in January, and the air most often feels dry.

Daylight stretches from about 9 h 36 min at the start of January to 10 h 12 min by month's end. Set against the rest of the year, January is Ōtsuki's 1st-clearest and 5th-windiest month. For the whole year in context, see Ōtsuki's year-round climate.

Daytime high
12th warmest
Overnight low
-3°
2nd coldest
Precipitation
81 mm
8.8 wet days
Daylight
9 h 48 min
6:58 AM – 4:49 PM
Cloud cover
42%
1st clearest
Wind
6 km/h
5th windiest
Solar energy
2.87 kWh/m²
Travel score
0.4
out of 10

Ōtsuki is city in Yamanashi Prefecture, Japan.

Density
86/km²
people per km²
Founded
1954

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 6°C through the month.

A typical January day in Ōtsuki reaches about 6°C in the afternoon and slips back to -3°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 2°C and 9°C. Set against its neighbours, January runs about 3°C cooler than December and on par with February.

-10°10°151015202531
Avg high (°C)Avg low (°C)
17-1
27-1
37-1
47-1
56-2
66-2
76-2
86-2
96-2
106-2
116-2
126-2
136-2
146-2
156-2
166-3
176-3
185-3
195-3
205-3
215-3
225-3
235-3
245-3
255-4
265-4
275-4
285-4
295-4
305-4
315-4

How January really feels in Ōtsuki

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.

Ōtsuki weather by month

How January compares with the rest of the year at a glance. January is the 12th-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -3°818.85.89.90.4
Feb / -3°879.96.210.70.7
Mar10° / 15815.15.111.72.0
Apr16° / 15814.30.812.94.2
May20° / 11°16814.9013.95.4
Jun23° / 16°22918.4014.45.0
Jul27° / 20°23019.8014.24.9
Aug27° / 21°18719.1013.35.0
Sep24° / 17°24917.2012.25.4
Oct18° / 11°24615.3011.15.1
Nov13° / 11311.30.110.13.7
Dec / 789.32.39.61.7

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 54% of the time in January, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 12% of January, with mostly cloudy or overcast conditions the remaining 34%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17327
27327
37327
47327
57327
67228
77129
87030
96931
106931
116733
126634
136436
146337
156238
166238
176139
186139
196139
206139
216139
226139
236238
246238
256337
266436
276436
286535
296535
306634
316634

Chance of precipitation in January

Any precipitationSnow

Ōtsuki gets around 81 mm of rain and snow over 8.8 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 29% and peaks near 33% on the wettest days, and about 6 days bring snow.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
12411
22411
32411
42412
52512
62513
72514
82615
92616
102717
112818
122919
133020
143021
153121
163222
173223
183323
193323
203324
213324
223323
233323
243223
253222
263122
273021
283021
292920
302920
312920

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 6 km/h in January.

Across January, daily wind ranges from about 5 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in January

DaylightNight

Daylight runs from about 9 h 36 min at the start of January to 10 h 12 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 6:58 AM to 6:52 AM, and sunset from 4:36 PM to 5:03 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.66:584:36
29.66:594:37
39.66:594:38
49.76:594:38
59.76:594:39
69.76:594:40
79.76:594:41
89.76:594:41
99.76:594:42
109.76:594:43
119.76:594:44
129.86:594:45
139.86:594:46
149.86:594:47
159.86:584:48
169.86:584:49
179.96:584:49
189.96:584:50
199.96:574:51
209.96:574:52
219.96:574:53
2210.06:564:54
2310.06:564:55
2410.06:564:56
2510.06:554:57
2610.16:554:58
2710.16:544:59
2810.16:535:00
2910.16:535:01
3010.26:525:02
3110.26:525:03

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 2.87 kWh/m².

For context, solar energy here swings from a low near 2.41 kWh/m² to a high of 5.16 kWh/m² in May across the year — January's 2.87 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
12.7Moderate
22.7Moderate
32.7Moderate
42.7Moderate
52.7Moderate
62.7Moderate
72.7Moderate
82.7Moderate
92.7Moderate
102.7Moderate
112.7Moderate
122.7Moderate
132.7Moderate
142.7Moderate
152.7Moderate
162.8Moderate
172.8Moderate
182.8Moderate
192.8Moderate
202.8Moderate
212.9Moderate
222.9Moderate
232.9Moderate
243.0Moderate
253.0Moderate
263.0Moderate
273.0Moderate
283.1Moderate
293.1Moderate
303.1Moderate
313.2Moderate
Planning a trip in January

Hazard calendar for Ōtsuki

In seasonPeak

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

Ōtsuki 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 Ōtsuki?

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

0.4
Sightseeing
12th-best month of the year
0.0
Beach & pool
10th-best month of the year

January is a weaker month for outdoor sightseeing in Ōtsuki.

What to pack for Ōtsuki in January

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

In January, Ōtsuki sees daytime highs around 6°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

Sea temperature near Ōtsuki in January

The nearest coast averages about 16°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 57 km away) is warmest in August at about 26°C and coldest in February near 15°C.

It's comfortable for a long swim from May 31 to Nov 26 — about 5.9 months when the water holds above 20°C.

15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan16Cool
Feb15Cool
Mar16Cool
Apr17Cool
May19Cool
Jun21Refreshing
Jul24Refreshing
Aug26Warm
Sep25Warm
Oct23Refreshing
Nov21Refreshing
Dec18Cool

UV index in Ōtsuki 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 Ōtsuki peaks around July 16 at about 10 (extreme) — 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 highExtremeVery highModerateJul 16UV 10Dec 23UV 2
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar6High
Apr7Very high
May9Very high
Jun10Very high
Jul11Extreme
Aug10Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec2Moderate

Air quality in Ōtsuki 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 Ōtsuki is worst in April — around 23 µg/m³ PM2.5 (moderate), about 2.4× the cleanest month (December, 10 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodApr 1623 µg/m³Dec 1610 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb20Moderate
Mar20Moderate
Apr23Moderate
May20Moderate
Jun17Moderate
Jul13Moderate
Aug12Good
Sep12Good
Oct12Good
Nov11Good
Dec10Good
Location & terrain

Where is Ōtsuki?

Ōtsuki sits at 35.6°N, 139.0°E, 360 m above sea level, in Japan. The nearest listed city is Tsuru, 10 km away.

Topography around Ōtsuki

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

Within 3 km, the terrain around Ōtsuki has large variations in elevation — a maximum elevation change of 737 m around an average of 476 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,836 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,737 m.

The land around Ōtsuki is covered by trees (82%) within 3 km, trees (94%) within 16 km, and trees (60%) and artificial surfaces (20%) within 80 km.

3 km
737 m
16 km
1,836 m
80 km
3,737 m
treesgrasslandcroplandartificial surfaceswater
January weather nearby: Tsuru 10 km · Uenohara 13 km · Kōshū 22 km · Enzan 24 km · Sagamihara 25 km · Itsukaichi 25 km · Fujiyoshida 26 km · Yamanashi 26 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 Ōtsuki (35.6185°, 138.974°, elevation 360 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).