Yamaga weather in January

In January, Yamaga sees average daytime highs of 9°C and overnight lows near 2°C, with 64 mm of precipitation across 8.2 wet days and about 10.1 hours of daylight. It is the 12th-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 9°C through the month. The sky is clear or mostly clear about 19% of the time in January, and the air most often feels dry.

Daylight stretches from about 9 h 54 min at the start of January to 10 h 24 min by month's end. Set against the rest of the year, January is Yamaga's 9th-clearest and 4th-windiest month. For the whole year in context, see Yamaga's year-round climate.

Daytime high
12th warmest
Overnight low
1st coldest
Precipitation
64 mm
8.2 wet days
Daylight
10 hours
7:25 AM – 5:28 PM
Cloud cover
64%
9th clearest
Wind
8 km/h
4th windiest
Solar energy
2.45 kWh/m²
Travel score
2.0
out of 10

Yamaga is city in Kumamoto Prefecture, Japan.

Density
164/km²
people per km²
Founded
2005

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 9°C through the month.

A typical January day in Yamaga reaches about 9°C in the afternoon and slips back to 2°C overnight — a 8°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 2°C cooler than February.

-5°10°15°151015202531
Avg high (°C)Avg low (°C)
1102
2102
3102
4102
5102
6102
7102
8102
9102
10102
1192
1292
1392
1492
1592
1692
1792
1892
1992
2092
2192
2292
2392
2492
2592
2692
2792
2892
2992
3092
3192

How January really feels in Yamaga

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.

Yamaga 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
Jan / 648.21.110.12.0
Feb11° / 889.3110.82.6
Mar15° / 13612.30.211.74.1
Apr19° / 10°15511.4012.85.8
May24° / 15°18111.5013.76.5
Jun26° / 19°42017014.15.3
Jul29° / 23°34317.80144.3
Aug31° / 24°15814.2013.24.2
Sep28° / 20°15611.3012.25.9
Oct23° / 14°967.5011.27.3
Nov17° / 847.9010.35.8
Dec12° / 697.90.49.93.2

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 19% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 20% of January, with mostly cloudy or overcast conditions the remaining 61%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14753
24753
34654
44555
54555
64456
74456
84357
94159
104060
114060
123862
133862
143763
153763
163565
173565
183466
193565
203565
213565
223565
233565
243565
253565
263565
273763
283763
293862
303961
314060

Chance of precipitation in January

Any precipitationSnow

Yamaga gets around 64 mm of rain and snow over 8.2 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 27% and peaks near 30% on the wettest days, and about 1 day brings snow. The odds climb toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
1233
2233
3233
4233
5233
6233
7233
8233
9243
10243
11253
12253
13263
14263
15273
16283
17284
18294
19294
20294
21304
22304
23304
24304
25305
26305
27305
28295
29295
30295
31294

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 54 min at the start of January to 10 h 24 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 7:25 AM to 7:20 AM, and sunset from 5:16 PM to 5:42 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.97:255:16
29.97:255:17
39.97:255:17
49.97:255:18
59.97:255:19
69.97:265:20
79.97:265:20
89.97:265:21
99.97:265:22
109.97:265:23
1110.07:265:24
1210.07:265:24
1310.07:265:25
1410.07:265:26
1510.07:255:27
1610.07:255:28
1710.17:255:29
1810.17:255:30
1910.17:255:30
2010.17:245:31
2110.17:245:32
2210.27:245:33
2310.27:235:34
2410.27:235:35
2510.27:235:36
2610.27:225:37
2710.37:225:38
2810.37:215:39
2910.37:215:40
3010.37:205:41
3110.47:205:42

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 2.45 kWh/m².

For context, solar energy here swings from a low near 2.27 kWh/m² to a high of 5.18 kWh/m² in May across the year — January's 2.45 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.4Moderate
22.4Moderate
32.4Moderate
42.4Moderate
52.4Moderate
62.4Moderate
72.4Moderate
82.4Moderate
92.4Moderate
102.4Moderate
112.4Moderate
122.4Moderate
132.4Moderate
142.4Moderate
152.4Moderate
162.4Moderate
172.4Moderate
182.4Moderate
192.4Moderate
202.4Moderate
212.5Moderate
222.5Moderate
232.5Moderate
242.5Moderate
252.6Moderate
262.6Moderate
272.6Moderate
282.7Moderate
292.7Moderate
302.7Moderate
312.8Moderate
Planning a trip in January

Hazard calendar for Yamaga

In seasonPeak

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

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

Yamaga's rainy season runs June–July, 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 Yamaga?

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

2.0
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 Yamaga.

What to pack for Yamaga in January

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

In January, Yamaga sees daytime highs around 9°C and nights near 2°C. Pack a warm layer. Worth having: rain gear. About 8 days see rain.

a warm layerrain gear

Sea temperature near Yamaga 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 17 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 13 — 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 Yamaga in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 3 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Yamaga peaks around July 13 at about 10 (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 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateJul 13UV 10Dec 21UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar6High
Apr8Very high
May8Very high
Jun10Very high
Jul10Very high
Aug9Very high
Sep9Very high
Oct7High
Nov4Moderate
Dec3Moderate

Air quality in Yamaga 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 Yamaga is worst in March — around 25 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (July, 13 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMar 2325 µg/m³Jul 2114 µg/m³
PM2.5 (µg/m³)Level
Jan18Moderate
Feb20Moderate
Mar25Moderate
Apr25Moderate
May23Moderate
Jun19Moderate
Jul13Moderate
Aug15Moderate
Sep14Moderate
Oct14Moderate
Nov16Moderate
Dec15Moderate
Location & terrain

Where is Yamaga?

Yamaga sits at 33.0°N, 130.7°E, 35 m above sea level, in Japan. The nearest listed city is Kikuchi, 12 km away.

Topography around Yamaga

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

Within 3 km, the terrain around Yamaga has only modest variations in elevation — a maximum elevation change of 153 m around an average of 42 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,029 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,765 m.

The land around Yamaga is covered by cropland (37%), trees (30%) and artificial surfaces (24%) within 3 km, trees (68%) within 16 km, and trees (65%) within 80 km.

3 km
153 m
16 km
1,029 m
80 km
1,765 m
treesgrasslandcroplandartificial surfacesbare terrainwater
January weather nearby: Kikuchi 12 km · Uekimachi-mōno 13 km · Tamana 13 km · Kōshi 16 km · Okino 19 km · Miyama 21 km · Ōmuta 22 km · Ōzu 23 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 Yamaga (33.0167°, 130.6891°, elevation 35 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).