Amami weather in December

In December, Amami sees average daytime highs of 19°C and overnight lows near 17°C, with 110 mm of rain across 12.9 wet days and about 10.2 hours of daylight. It is the 9th-warmest and 12th-wettest month of the year here.

Highs ease over the month, from about 20°C in the first days to 18°C by the end. The sky is clear or mostly clear about 15% of the time in December, and the air most often feels dry.

Daylight stretches from about 10 h 18 min at the start of December to 10 h 12 min by month's end. Set against the rest of the year, December is Amami's 6th-clearest and 2nd-windiest month. For the whole year in context, see Amami's year-round climate.

Daytime high
19°
9th warmest
Overnight low
17°
4th coldest
Rainfall
110 mm
12.9 wet days
Daylight
10 h 12 min
7:12 AM – 5:24 PM
Cloud cover
69%
6th clearest
Wind
25 km/h
2nd windiest
Solar energy
2.19 kWh/m²
Travel score
5.5
out of 10

Amami is city in Kagoshima prefecture, Japan.

Density
134/km²
people per km²
Founded
2006

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 20°C in the first days to 18°C by the end.

A typical December day in Amami reaches about 19°C in the afternoon and slips back to 17°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 22°C. Set against its neighbours, December runs about 3°C cooler than November and about 2°C warmer than January.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
12018
22018
32018
42018
52018
62018
72018
81917
91917
101917
111917
121917
131917
141917
151917
161917
171917
181816
191816
201816
211816
221816
231816
241816
251816
261816
271816
281816
291816
301816
311816

How December really feels in Amami

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

December sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Amami weather by month

How December compares with the rest of the year at a glance. December is the 9th-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan17° / 15°12414.310.44.7
Feb17° / 15°12112.8114.8
Mar19° / 16°15714.511.85.3
Apr21° / 19°15813.212.75.8
May23° / 22°2101413.46.0
Jun26° / 25°32017.613.85.2
Jul29° / 27°12810.713.65.5
Aug29° / 27°14213.8135.2
Sep28° / 26°17515.212.25.6
Oct25° / 24°14912.611.36.5
Nov22° / 20°11810.910.66.4
Dec19° / 17°11012.910.25.5

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 15% 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 65%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14258
24258
33961
43961
53961
63763
73664
83565
93565
103466
113466
123367
133367
143367
153268
163367
173367
183268
193466
203466
213466
223367
233367
243466
253466
263466
273466
283466
293367
303367
313268

Chance of precipitation in December

Any precipitation

Amami gets around 110 mm of rain over 12.9 wet days in December, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 42% and peaks near 44% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
141
241
341
442
542
642
742
842
942
1043
1143
1243
1343
1444
1544
1644
1744
1844
1943
2043
2142
2242
2341
2441
2541
2640
2740
2840
2940
3040
3141

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 68% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
14824198
25123188
35323177
45422177
55622166
65821156
76021145
86021145
96320134
106420124
116519124
126619123
136718123
146718123
156818122
166917122
176917122
187016122
197116121
207315111
217315111
227414111
237514101
247613101
257613101
26771391
27771391
28781381
29791380
30801370
31801370

Wind in December

Winds average 25 km/h in December.

Across December, daily wind ranges from about 25 km/h on the calmest days to 25 km/h at its breeziest. It stays fairly steady from day to day.

0102030151015202531
Wind speed (km/h)Feels
125breezy
225breezy
325breezy
425breezy
525breezy
625breezy
725breezy
825breezy
925breezy
1025breezy
1125breezy
1225breezy
1325breezy
1425breezy
1525breezy
1625breezy
1725breezy
1825breezy
1925breezy
2025breezy
2125breezy
2225breezy
2325breezy
2425breezy
2525breezy
2625breezy
2725breezy
2825breezy
2925breezy
3025breezy
3125breezy

Sunrise & sunset in December

DaylightNight

Daylight runs from about 10 h 18 min at the start of December to 10 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 6 minutes over December. Sunrise moves from 7:02 AM to 7:19 AM, and sunset from 5:22 PM to 5:32 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.37:025:22
210.37:035:22
310.37:035:22
410.37:045:22
510.37:055:22
610.37:065:22
710.37:065:22
810.37:075:22
910.27:085:22
1010.27:085:23
1110.27:095:23
1210.27:105:23
1310.27:105:23
1410.27:115:24
1510.27:115:24
1610.27:125:24
1710.27:135:25
1810.27:135:25
1910.27:145:25
2010.27:145:26
2110.27:155:26
2210.27:155:27
2310.27:165:27
2410.27:165:28
2510.27:175:28
2610.27:175:29
2710.27:175:29
2810.27:185:30
2910.27:185:31
3010.27:185:31
3110.27:195:32

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.19 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.19 kWh/m² to a high of 6.23 kWh/m² in July across the year — December's 2.19 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.4Moderate
22.4Moderate
32.4Moderate
42.4Moderate
52.3Moderate
62.3Moderate
72.3Moderate
82.3Moderate
92.2Moderate
102.2Moderate
112.2Moderate
122.2Moderate
132.2Moderate
142.2Moderate
152.2Moderate
162.2Moderate
172.2Moderate
182.2Moderate
192.2Moderate
202.2Moderate
212.2Moderate
222.2Moderate
232.2Moderate
242.2Moderate
252.2Moderate
262.2Moderate
272.2Moderate
282.2Moderate
292.2Moderate
302.2Moderate
312.2Moderate
Planning a trip in December

Hazard calendar for Amami

In seasonPeak

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

Amami 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 Amami?

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

5.5
Sightseeing
6th-best month of the year
2.3
Beach & pool
9th-best month of the year

December is a reasonable time to visit Amami for sightseeing.

What to pack for Amami in December

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

In December, Amami sees daytime highs around 19°C and nights near 17°C. Worth packing: rain gear and a windbreaker. About 13 days see rain.

rain geara windbreaker

Sea temperature near Amami in December

The nearest coast averages about 23°C in December — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in August at about 29°C and coldest in February near 21°C.

The water stays above 20°C all year — warm enough for a swim any month.

20°25°30°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan22Refreshing
Feb21Refreshing
Mar21Refreshing
Apr22Refreshing
May24Refreshing
Jun26Warm
Jul28Tropical
Aug29Tropical
Sep28Tropical
Oct27Warm
Nov25Warm
Dec23Refreshing

UV index in Amami in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Amami peaks around July 14 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 10 at about 4 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateJul 14UV 11Jan 10UV 4
UV index (midday)Level
Jan4Moderate
Feb6High
Mar8Very high
Apr9Very high
May9Very high
Jun11Extreme
Jul12Extreme
Aug10Extreme
Sep10Extreme
Oct7Very high
Nov6High
Dec4Moderate

Air quality in Amami 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 Amami is worst in April — around 17 µg/m³ PM2.5 (moderate), about 2.3× the cleanest month (July, 8 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodApr 1017 µg/m³Jul 178 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb15Moderate
Mar17Moderate
Apr17Moderate
May14Moderate
Jun9Good
Jul8Good
Aug9Good
Sep9Good
Oct9Good
Nov10Good
Dec10Good
Location & terrain

Where is Amami?

Amami sits at 28.4°N, 129.5°E, 21 m above sea level, in Japan. The nearest listed city is Naze, 2.0 km away.

TsuhaNagoYakushimaIshikawaUrumaGushikawaKatsuren-haebaru

Topography around Amami

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

Within 3 km, the terrain around Amami has significant variations in elevation — a maximum elevation change of 376 m around an average of 130 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 517 m; within 80 km, large variations in elevation — a maximum elevation change of 682 m.

The land around Amami is covered by trees (82%) within 3 km, water (59%) and trees (39%) within 16 km, and water (95%) within 80 km.

3 km
376 m
16 km
517 m
80 km
682 m
treesartificial surfaceswater
December weather nearby: Naze 2.0 km · Tsuha 236 km · Nago 246 km · Yakushima 250 km · Ishikawa 273 km · Uruma 275 km · Gushikawa 276 km · Katsuren-haebaru 278 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 Amami (28.3769°, 129.4938°, elevation 21 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).