Ōmihachiman weather in January

In January, Ōmihachiman sees average daytime highs of 7°C and overnight lows near 1°C, with 81 mm of precipitation across 13.9 wet days and about 9.9 hours of daylight. It is the 12th-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 7°C through the month. The sky is clear or mostly clear about 13% of the time in January, and the air most often feels dry.

Daylight stretches from about 9 h 42 min at the start of January to 10 h 12 min by month's end. Set against the rest of the year, January is Ōmihachiman's 6th-clearest and 3rd-windiest month. For the whole year in context, see Ōmihachiman's year-round climate.

Daytime high
12th warmest
Overnight low
2nd coldest
Precipitation
81 mm
13.9 wet days
Daylight
9 h 54 min
7:09 AM – 5:01 PM
Cloud cover
64%
6th clearest
Wind
11 km/h
3rd windiest
Solar energy
2.46 kWh/m²
Travel score
0.7
out of 10

Ōmihachiman is city in Shiga Prefecture, Japan.

Density
1,068/km²
people per km²
Founded
2010

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 7°C through the month.

A typical January day in Ōmihachiman reaches about 7°C in the afternoon and slips back to 1°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 3°C and 10°C. Set against its neighbours, January runs about 3°C cooler than December and about 1°C cooler than February.

-5°10°15°151015202531
Avg high (°C)Avg low (°C)
171
271
371
471
571
671
771
871
971
1071
1171
1271
1371
1471
1571
1671
1770
1870
1960
2060
2160
2260
2360
2460
2560
2660
2760
2860
2960
3060
3160

How January really feels in Ōmihachiman

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.

Ōmihachiman 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 / 8113.97.59.90.7
Feb / 7612.76.510.71.0
Mar12° / 11613.52.111.72.7
Apr17° / 12311.60.112.95.1
May22° / 13°14811.6013.86.3
Jun25° / 18°18614014.35.7
Jul29° / 22°21015.9014.14.5
Aug31° / 23°12212.4013.34.3
Sep27° / 20°17912.3012.25.9
Oct21° / 14°15210.8011.16.4
Nov15° / 819010.24.7
Dec / 7511.63.19.72.0

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 13% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 32% of January, with mostly cloudy or overcast conditions the remaining 55%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15149
25149
34951
45050
55050
64951
74951
84951
94852
104852
114852
124753
134654
144654
154555
164456
174456
184357
194258
204258
214159
224159
234159
244258
254258
264258
274258
284258
294357
304357
314456

Chance of precipitation in January

Any precipitationSnow

Ōmihachiman gets around 81 mm of rain and snow over 13.9 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 45% and peaks near 47% on the wettest days, and about 8 days bring snow.

0%20%40%60%151015202531
Rain chance (%)Snow chance (%)
14522
24522
34523
44523
54523
64423
74423
84424
94424
104424
114424
124424
134424
144423
154423
164423
174423
184423
194424
204424
214424
224525
234525
244626
254626
264627
274727
284727
294727
304728
314727

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 11 km/h in January.

Across January, daily wind ranges from about 10 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm
3111calm

Sunrise & sunset in January

DaylightNight

Daylight runs from about 9 h 42 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 30 minutes over January. Sunrise moves from 7:09 AM to 7:02 AM, and sunset from 4:49 PM to 5:16 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.77:094:49
29.77:094:50
39.77:094:50
49.77:094:51
59.77:094:52
69.77:094:53
79.77:094:53
89.77:094:54
99.87:094:55
109.87:094:56
119.87:094:57
129.87:094:58
139.87:094:58
149.87:094:59
159.97:095:00
169.97:095:01
179.97:085:02
189.97:085:03
199.97:085:04
2010.07:075:05
2110.07:075:06
2210.07:075:07
2310.07:065:08
2410.07:065:09
2510.17:055:10
2610.17:055:11
2710.17:045:12
2810.17:045:13
2910.27:035:14
3010.27:035:15
3110.27:025:16

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 2.46 kWh/m².

For context, solar energy here swings from a low near 2.15 kWh/m² to a high of 5.32 kWh/m² in May across the year — January's 2.46 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.3Moderate
22.3Moderate
32.3Moderate
42.3Moderate
52.3Moderate
62.3Moderate
72.3Moderate
82.3Moderate
92.3Moderate
102.3Moderate
112.3Moderate
122.4Moderate
132.4Moderate
142.4Moderate
152.4Moderate
162.4Moderate
172.4Moderate
182.4Moderate
192.5Moderate
202.5Moderate
212.5Moderate
222.5Moderate
232.5Moderate
242.6Moderate
252.6Moderate
262.6Moderate
272.7Moderate
282.7Moderate
292.7Moderate
302.8Moderate
312.8Moderate
Planning a trip in January

Hazard calendar for Ōmihachiman

In seasonPeak

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

Ōmihachiman 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 Ōmihachiman?

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

0.7
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 Ōmihachiman.

What to pack for Ōmihachiman in January

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

In January, Ōmihachiman sees daytime highs around 7°C and nights near 1°C. Pack a warm layer. Worth having: a heavy coat and rain gear. About 14 days see rain.

a warm layera heavy coatrain gear

Sea temperature near Ōmihachiman in January

The nearest coast averages about 14°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 56 km away) is warmest in August at about 27°C and coldest in February near 13°C.

It's comfortable for a long swim from May 31 to Nov 9 — about 5.4 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb13Bracing
Mar14Bracing
Apr15Cool
May18Cool
Jun22Refreshing
Jul26Warm
Aug27Warm
Sep26Warm
Oct22Refreshing
Nov19Cool
Dec16Cool

UV index in Ōmihachiman 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 Ōmihachiman peaks around July 14 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 highVery highModerateJul 14UV 10Dec 23UV 2
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5High
Apr7High
May8Very high
Jun10Very high
Jul10Extreme
Aug9Very high
Sep9Very high
Oct6High
Nov3Moderate
Dec2Moderate

Air quality in Ōmihachiman 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 Ōmihachiman is worst in April — around 24 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (October, 12 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1723 µg/m³Oct 1812 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb17Moderate
Mar22Moderate
Apr24Moderate
May22Moderate
Jun19Moderate
Jul17Moderate
Aug17Moderate
Sep14Moderate
Oct12Good
Nov13Moderate
Dec12Moderate
Location & terrain

Where is Ōmihachiman?

Ōmihachiman sits at 35.1°N, 136.1°E, 91 m above sea level, in Japan. The nearest listed city is Yasu, 8.0 km away.

Topography around Ōmihachiman

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

Within 3 km, the terrain around Ōmihachiman has only modest variations in elevation — a maximum elevation change of 198 m around an average of 95 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 355 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,602 m.

The land around Ōmihachiman is covered by cropland (52%) and artificial surfaces (37%) within 3 km, cropland (31%), water (27%) and artificial surfaces (21%) within 16 km, and trees (58%) within 80 km.

3 km
198 m
16 km
355 m
80 km
1,602 m
treesgrasslandcroplandartificial surfacesbare terrainwater
January weather nearby: Yasu 8.0 km · Youkaichi 9.0 km · Echigawa 10 km · Moriyama 12 km · Rittō 14 km · Konan 14 km · Kitahama 17 km · Kusatsu 17 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 Ōmihachiman (35.1286°, 136.0976°, elevation 91 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).