Aizu-Wakamatsu weather in December

In December, Aizu-Wakamatsu sees average daytime highs of 5°C and overnight lows near -1°C, with 93 mm of precipitation across 18.1 wet days and about 9.5 hours of daylight. It is the 10th-warmest and 10th-wettest month of the year here.

Highs ease over the month, from about 7°C in the first days to 3°C by the end. The sky is clear or mostly clear about 7% of the time in December, and the air most often feels dry.

Daylight stretches from about 9 h 36 min at the start of December to 9 h 24 min by month's end. Set against the rest of the year, December is Aizu-Wakamatsu's 8th-clearest and 4th-windiest month. For the whole year in context, see Aizu-Wakamatsu's year-round climate.

Daytime high
10th warmest
Overnight low
-1°
4th coldest
Precipitation
93 mm
18.1 wet days
Daylight
9 h 24 min
6:54 AM – 4:19 PM
Cloud cover
72%
8th clearest
Wind
10 km/h
4th windiest
Solar energy
2.02 kWh/m²
Travel score
0.2
out of 10

Aizu-Wakamatsu is city in Fukushima prefecture, Japan.

Density
309/km²
people per km²
Founded
1955

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 7°C in the first days to 3°C by the end.

A typical December day in Aizu-Wakamatsu reaches about 5°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 1°C and 9°C. Set against its neighbours, December runs about 6°C cooler than November and about 3°C warmer than January.

-10°-5°10°15°151015202531
Avg high (°C)Avg low (°C)
181
271
371
471
571
660
760
860
960
1060
1150
125-1
135-1
145-1
155-1
165-1
175-1
184-1
194-2
204-2
214-2
224-2
234-2
244-2
253-2
263-2
273-2
283-3
293-3
303-3
313-3

How December really feels in Aizu-Wakamatsu

Once humidity and wind are folded in, December 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 December is cold — wind chill drags the overnight "feels like" below the raw low.

Aizu-Wakamatsu weather by month

How December compares with the rest of the year at a glance. December is the 10th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -4°10018.919.89.70.0
Feb / -4°7315.315.410.60.0
Mar / -1°10115.610.611.70.7
Apr13° / 9512.82.412.93.5
May19° / 9511.80145.8
Jun23° / 15°11712.5014.56.0
Jul26° / 19°18017014.35.4
Aug27° / 20°13213.9013.45.7
Sep23° / 16°14413012.36.0
Oct17° / 10°12511.70115.1
Nov11° / 8213.22.6102.5
Dec / -1°9318.113.59.50.2

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 7% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 19% of December, with mostly cloudy or overcast conditions the remaining 74%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12971
22971
32872
42872
52872
62674
72674
82674
92674
102575
112674
122674
132674
142674
152674
162674
172674
182674
192674
202674
212674
222674
232674
242674
252674
262476
272476
282476
292476
302476
312377

Chance of precipitation in December

Any precipitationSnow

Aizu-Wakamatsu gets around 93 mm of rain and snow over 18.1 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 58% and peaks near 63% on the wettest days, and about 14 days bring snow. The odds climb toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)Snow chance (%)
15223
25324
35426
45427
55529
65630
75732
85733
95735
105837
115838
125839
135840
145841
155843
165844
175845
185846
195847
205848
215949
225950
235951
246053
256054
266055
276156
286257
296258
306360
316361

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

Most of December feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, December 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 December

Winds average 10 km/h in December.

Across December, daily wind ranges from about 9 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
19calm
29calm
39calm
49calm
59calm
69calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm
3111calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 9 h 36 min at the start of December to 9 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 12 minutes over December. Sunrise moves from 6:42 AM to 7:00 AM, and sunset from 4:18 PM to 4:27 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.66:424:18
29.66:434:18
39.66:444:18
49.66:454:18
59.56:454:18
69.56:464:18
79.56:474:18
89.56:484:18
99.56:494:18
109.56:494:18
119.56:504:18
129.56:514:18
139.46:524:18
149.46:524:19
159.46:534:19
169.46:544:19
179.46:544:19
189.46:554:20
199.46:554:20
209.46:564:21
219.46:564:21
229.46:574:21
239.46:574:22
249.46:584:22
259.46:584:23
269.46:594:24
279.46:594:24
289.46:594:25
299.47:004:25
309.47:004:26
319.47:004:27

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.02 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.02 kWh/m² to a high of 5.33 kWh/m² in May across the year — December's 2.02 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.0Dim
22.0Dim
32.0Dim
42.0Dim
52.0Dim
62.0Dim
72.0Dim
82.0Dim
92.0Dim
102.0Dim
112.0Dim
122.0Dim
132.0Dim
142.0Moderate
152.0Moderate
162.0Moderate
172.0Moderate
182.0Moderate
192.1Moderate
202.1Moderate
212.1Moderate
222.1Moderate
232.1Moderate
242.1Moderate
252.1Moderate
262.2Moderate
272.2Moderate
282.2Moderate
292.2Moderate
302.2Moderate
312.2Moderate
Planning a trip in December

Hazard calendar for Aizu-Wakamatsu

In seasonPeak

In December, Aizu-Wakamatsu sits inside its pacific typhoon season. The full year is below, with each hazard's peak months called out.

Aizu-Wakamatsu 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 December a good time to visit Aizu-Wakamatsu?

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

0.2
Sightseeing
10th-best month of the year
0.0
Beach & pool
9th-best month of the year

December is a weaker month for outdoor sightseeing in Aizu-Wakamatsu.

What to pack for Aizu-Wakamatsu in December

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

In December, Aizu-Wakamatsu sees daytime highs around 5°C and nights near -1°C. Pack a warm layer and rain gear. Worth having: a heavy coat. About 18 days see rain.

a warm layerrain geara heavy coat

UV index in Aizu-Wakamatsu in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 2. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Aizu-Wakamatsu peaks around August 12 at about 10 (very high) — 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 highModerateAug 12UV 10Dec 23UV 2
UV index (midday)Level
Jan2Moderate
Feb3Moderate
Mar5Moderate
Apr7High
May8Very high
Jun9Very high
Jul9Very high
Aug10Very high
Sep8Very high
Oct6High
Nov3Moderate
Dec2Low

Air quality in Aizu-Wakamatsu in December

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where December falls, not just the annual average.

Air quality in Aizu-Wakamatsu is worst in April — around 21 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (December, 10 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1721 µg/m³Dec 1810 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb14Moderate
Mar20Moderate
Apr21Moderate
May20Moderate
Jun16Moderate
Jul14Moderate
Aug12Good
Sep11Good
Oct12Good
Nov11Good
Dec10Good
Location & terrain

Where is Aizu-Wakamatsu?

Aizu-Wakamatsu sits at 37.5°N, 139.9°E, 238 m above sea level, in Japan. The nearest listed city is Bange, 14 km away.

Topography around Aizu-Wakamatsu

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

Within 3 km, the terrain around Aizu-Wakamatsu has significant variations in elevation — a maximum elevation change of 539 m around an average of 322 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,422 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,125 m.

The land around Aizu-Wakamatsu is covered by trees (49%) and artificial surfaces (45%) within 3 km, trees (53%) and cropland (27%) within 16 km, and trees (85%) within 80 km.

3 km
539 m
16 km
1,422 m
80 km
2,125 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Bange 14 km · Aizu-misato Machi 15 km · Kitakata 19 km · Kōriyama 40 km · Motomiya 40 km · Kumakura 43 km · Nihommatsu 44 km · Sukagawa 45 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 Aizu-Wakamatsu (37.4914°, 139.9455°, elevation 238 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). 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).