Yamaguma weather in January

In January, Yamaguma sees average daytime highs of 10°C and overnight lows near 2°C, with 63 mm of precipitation across 9.6 wet days and about 10 hours of daylight. It is the 12th-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 10°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 48 min at the start of January to 10 h 18 min by month's end. Set against the rest of the year, January is Yamaguma's 10th-clearest and 3rd-windiest month. For the whole year in context, see Yamaguma's year-round climate.

Daytime high
10°
12th warmest
Overnight low
1st coldest
Precipitation
63 mm
9.6 wet days
Daylight
10 hours
7:26 AM – 5:27 PM
Cloud cover
69%
10th clearest
Wind
9 km/h
3rd windiest
Solar energy
2.34 kWh/m²
Travel score
2.1
out of 10

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 10°C through the month.

A typical January day in Yamaguma reaches about 10°C in the afternoon and slips back to 2°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 5°C and 13°C. Set against its neighbours, January runs about 2°C cooler than December and about 1°C cooler than February.

-5°10°15°151015202531
Avg high (°C)Avg low (°C)
1113
2103
3103
4103
5103
6103
7103
8103
9103
10103
11103
12103
13103
14103
15102
16102
1792
1892
1992
2092
2192
2292
2392
2492
2592
2692
2792
2892
2992
3092
31102

How January really feels in Yamaguma

Once humidity and wind are folded in, January averages 0 days that feel above 32°C and 20 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
20
wind chill below the day's low

The story in January is cold — wind chill drags the overnight "feels like" below the raw low.

Yamaguma weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan10° / 639.61.5102.1
Feb11° / 719.11.210.82.6
Mar14° / 11511.60.211.74.1
Apr19° / 10°13011.1012.85.9
May24° / 15°14710.6013.76.6
Jun27° / 20°30515.8014.25.3
Jul30° / 24°28717.50143.9
Aug32° / 24°17115.1013.23.7
Sep28° / 21°17912.8012.25.5
Oct23° / 15°1018011.27.2
Nov18° / 868.6010.35.8
Dec12° / 699.30.69.83.3

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 19% of January, with mostly cloudy or overcast conditions the remaining 68%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13961
23961
33862
43862
53862
63664
73565
83466
93466
103367
113268
123169
133169
142971
152971
162971
172872
182872
192872
202872
212872
222872
232971
242971
252971
262971
273169
283169
293169
303367
313367

Chance of precipitation in January

Any precipitationSnow

Yamaguma gets around 63 mm of rain and snow over 9.6 wet days in January, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 31% and peaks near 35% on the wettest days, and about 2 days bring snow. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)Snow chance (%)
1264
2264
3264
4264
5264
6265
7274
8274
9284
10294
11304
12304
13314
14324
15335
16335
17345
18355
19355
20355
21355
22355
23355
24355
25356
26346
27346
28336
29325
30325
31315

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 9 km/h in January.

Across January, daily wind ranges from about 9 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm
319calm

Sunrise & sunset in January

DaylightNight

Daylight runs from about 9 h 48 min at the start of January to 10 h 18 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 7:26 AM to 7:21 AM, and sunset from 5:15 PM to 5:41 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.87:265:15
29.87:265:16
39.87:265:17
49.87:275:17
59.97:275:18
69.97:275:19
79.97:275:20
89.97:275:20
99.97:275:21
109.97:275:22
119.97:275:23
129.97:275:24
1310.07:275:25
1410.07:275:25
1510.07:275:26
1610.07:265:27
1710.07:265:28
1810.07:265:29
1910.17:265:30
2010.17:265:31
2110.17:255:32
2210.17:255:33
2310.17:255:34
2410.27:245:34
2510.27:245:35
2610.27:235:36
2710.27:235:37
2810.37:225:38
2910.37:225:39
3010.37:215:40
3110.37:215:41

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 2.34 kWh/m².

For context, solar energy here swings from a low near 2.18 kWh/m² to a high of 5.36 kWh/m² in May across the year — January's 2.34 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
122.3Moderate
132.3Moderate
142.3Moderate
152.3Moderate
162.3Moderate
172.3Moderate
182.3Moderate
192.3Moderate
202.4Moderate
212.4Moderate
222.4Moderate
232.4Moderate
242.5Moderate
252.5Moderate
262.5Moderate
272.5Moderate
282.6Moderate
292.6Moderate
302.6Moderate
312.7Moderate
Planning a trip in January

Hazard calendar for Yamaguma

In seasonPeak

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

Yamaguma sits in the Pacific typhoon belt; the season peaks July–October.

Yamaguma's rainy season runs May–September, when most of the year's rain falls.

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

Is January a good time to visit Yamaguma?

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

2.1
Sightseeing
12th-best month of the year
0.0
Beach & pool
11th-best month of the year

January is a weaker month for outdoor sightseeing in Yamaguma.

What to pack for Yamaguma in January

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

In January, Yamaguma sees daytime highs around 10°C and nights near 2°C. Pack a warm layer. Worth having: rain gear. About 10 days see rain.

a warm layerrain gear

Sea temperature near Yamaguma 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 40 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 27 to Nov 12 — about 5.6 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb13Bracing
Mar14Bracing
Apr16Cool
May19Cool
Jun22Refreshing
Jul25Warm
Aug27Warm
Sep26Warm
Oct23Refreshing
Nov20Cool
Dec17Cool

UV index in Yamaguma 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 Yamaguma peaks around July 17 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateJul 17UV 9Dec 21UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar6High
Apr8Very high
May8Very high
Jun9Very high
Jul10Very high
Aug9Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Yamaguma 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 Yamaguma is worst in April — around 25 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (October, 12 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1225 µg/m³Oct 1212 µg/m³
PM2.5 (µg/m³)Level
Jan17Moderate
Feb20Moderate
Mar25Moderate
Apr25Moderate
May23Moderate
Jun18Moderate
Jul13Moderate
Aug15Moderate
Sep13Moderate
Oct12Moderate
Nov15Moderate
Dec14Moderate
Location & terrain

Where is Yamaguma?

Yamaguma sits at 33.4°N, 130.6°E, 25 m above sea level, in Japan. The nearest listed city is Tachiarai, 2.0 km away.

Topography around Yamaguma

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

Within 3 km, the terrain around Yamaguma has only modest variations in elevation — a maximum elevation change of 119 m around an average of 30 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 969 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,799 m.

The land around Yamaguma is covered by cropland (53%) and artificial surfaces (30%) within 3 km, trees (52%), cropland (21%) and artificial surfaces (21%) within 16 km, and trees (46%) and water (33%) within 80 km.

3 km
119 m
16 km
969 m
80 km
1,799 m
treesgrasslandcroplandartificial surfacesbare terrainwater
January weather nearby: Tachiarai 2.0 km · Amagi 4.0 km · Ogōri 7.0 km · Asakura 10 km · Tanushimarumachi-toyoki 10 km · Sonobe 11 km · Tosu 11 km · Chikushino-shi 12 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 Yamaguma (33.4212°, 130.6136°, elevation 25 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).