Ojiya weather in January

In January, Ojiya sees average daytime highs of 4°C and overnight lows near -2°C, with 227 mm of precipitation across 25.6 wet days and about 9.7 hours of daylight. It is the 12th-warmest and 2nd-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 5% 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 Ojiya's 12th-clearest and 2nd-windiest month. For the whole year in context, see Ojiya's year-round climate.

Daytime high
12th warmest
Overnight low
-2°
1st coldest
Precipitation
227 mm
25.6 wet days
Daylight
9 h 42 min
7:03 AM – 4:45 PM
Cloud cover
79%
12th clearest
Wind
8 km/h
2nd windiest
Solar energy
2.2 kWh/m²
Travel score
0.0
out of 10

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 Ojiya reaches about 4°C in the afternoon and slips back to -2°C overnight — a 6°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)
15-2
25-2
34-2
44-2
54-2
64-2
74-2
84-2
94-2
104-2
114-2
124-2
134-2
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 Ojiya

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.

Ojiya weather by month

How January compares with the rest of the year at a glance. January is the 12th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -2°22725.621.99.70.0
Feb / -2°16821.417.810.60.1
Mar / -0°16220.611.711.71.3
Apr16° / 12215.51.712.94.3
May22° / 11°12713.90146.0
Jun25° / 16°15115.3014.55.7
Jul29° / 21°24319.1014.34.4
Aug30° / 21°17116.7013.44.2
Sep26° / 17°17715.8012.35.5
Oct20° / 11°17415.90115.3
Nov13° / 16618.22.3103.0
Dec / -0°21823.614.29.50.6

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 5% of the time in January, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 9% of January, with mostly cloudy or overcast conditions the remaining 86%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
11783
21783
31684
41684
51684
61585
71585
81486
91486
101486
111486
121387
131387
141387
151387
161387
171387
181387
191387
201387
211486
221486
231486
241387
251387
261387
271387
281387
291486
301486
311585

Chance of precipitation in January

Any precipitationSnow

Ojiya gets around 227 mm of rain and snow over 25.6 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 82% and peaks near 83% on the wettest days, and about 22 days bring snow.

0%20%40%60%80%151015202531
Rain chance (%)Snow chance (%)
18266
28267
38267
48268
58368
68269
78269
88269
98269
108269
118269
128269
138269
148269
158269
168270
178270
188270
198270
208271
218271
228371
238372
248372
258373
268373
278373
288373
298373
308373
318273

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 8 km/h in January.

Across January, daily wind ranges from about 8 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm
318calm

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 7:04 AM to 6:56 AM, and sunset from 4:32 PM to 5:00 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.57:044:32
29.57:044:33
39.57:044:34
49.57:044:34
59.57:044:35
69.57:044:36
79.57:044:37
89.67:044:38
99.67:044:39
109.67:044:39
119.67:044:40
129.67:044:41
139.67:044:42
149.77:044:43
159.77:034:44
169.77:034:45
179.77:034:46
189.77:034:47
199.87:024:48
209.87:024:49
219.87:014:50
229.87:014:51
239.97:014:52
249.97:004:53
259.97:004:54
269.96:594:55
2710.06:584:56
2810.06:584:57
2910.06:574:58
3010.06:564:59
3110.16:565:00

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 2.2 kWh/m².

For context, solar energy here swings from a low near 1.86 kWh/m² to a high of 5.67 kWh/m² in May across the year — January's 2.2 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.0Dim
22.0Dim
32.0Dim
42.0Moderate
52.0Moderate
62.0Moderate
72.0Moderate
82.0Moderate
92.0Moderate
102.1Moderate
112.1Moderate
122.1Moderate
132.1Moderate
142.1Moderate
152.1Moderate
162.2Moderate
172.2Moderate
182.2Moderate
192.2Moderate
202.3Moderate
212.3Moderate
222.3Moderate
232.3Moderate
242.4Moderate
252.4Moderate
262.4Moderate
272.5Moderate
282.5Moderate
292.5Moderate
302.5Moderate
312.6Moderate
Planning a trip in January

Hazard calendar for Ojiya

In seasonPeak

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

Ojiya 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 Ojiya?

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
10th-best month of the year

January is a weaker month for outdoor sightseeing in Ojiya.

What to pack for Ojiya in January

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

In January, Ojiya sees daytime highs around 4°C and nights near -2°C. Pack a warm layer and rain gear. Worth having: a heavy coat. About 26 days see rain.

a warm layerrain geara heavy coat

Sea temperature near Ojiya in January

The nearest coast averages about 12°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 18 km away) is warmest in August at about 27°C and coldest in March near 10°C.

It's comfortable for a long swim from Jun 21 to Oct 31 — about 4.4 months when the water holds above 20°C.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan12Bracing
Feb11Bracing
Mar10Bracing
Apr11Bracing
May15Bracing
Jun20Cool
Jul23Refreshing
Aug27Warm
Sep25Warm
Oct22Refreshing
Nov18Cool
Dec15Cool

UV index in Ojiya 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 Ojiya peaks around August 12 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 highModerateAug 12UV 10Dec 21UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar5Moderate
Apr7High
May8Very high
Jun9Very high
Jul10Very high
Aug10Very high
Sep8Very high
Oct5High
Nov3Moderate
Dec2Moderate

Air quality in Ojiya 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 Ojiya is worst in April — around 23 µg/m³ PM2.5 (moderate), about 2.3× the cleanest month (December, 10 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodApr 1723 µg/m³Dec 1610 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb15Moderate
Mar22Moderate
Apr23Moderate
May22Moderate
Jun19Moderate
Jul17Moderate
Aug14Moderate
Sep12Moderate
Oct12Good
Nov11Good
Dec10Good
Location & terrain

Where is Ojiya?

Ojiya sits at 37.3°N, 138.8°E, 72 m above sea level, in Japan. The nearest listed city is Uonuma, 16 km away.

Topography around Ojiya

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

Within 3 km, the terrain around Ojiya has significant variations in elevation — a maximum elevation change of 296 m around an average of 107 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 711 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,554 m.

The land around Ojiya is covered by trees (42%), cropland (22%) and artificial surfaces (22%) within 3 km, trees (74%) within 16 km, and trees (62%) and water (26%) within 80 km.

3 km
296 m
16 km
711 m
80 km
2,554 m
treesgrasslandcroplandartificial surfacesbare terrainwater
January weather nearby: Uonuma 16 km · Nagaoka 17 km · Tōkamachi 19 km · Kashiwazaki 23 km · Minamiuonuma 25 km · Tochio-honchō 26 km · Muikamachi 27 km · Mitsuke 28 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 Ojiya (37.3°, 138.8°, elevation 72 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).