Susono weather in December

In December, Susono sees average daytime highs of 10°C and overnight lows near 3°C, with 90 mm of precipitation across 10.4 wet days and about 9.7 hours of daylight. It is the 10th-warmest and 12th-wettest month of the year here.

Highs ease over the month, from about 12°C in the first days to 8°C by the end. The sky is clear or mostly clear about 48% of the time in December, and the air most often feels dry.

Daylight stretches from about 9 h 48 min at the start of December to 9 h 42 min by month's end. Set against the rest of the year, December is Susono's 1st-clearest and 11th-windiest month. For the whole year in context, see Susono's year-round climate.

Daytime high
10°
10th warmest
Overnight low
3rd coldest
Precipitation
90 mm
10.4 wet days
Daylight
9 h 36 min
6:51 AM – 4:30 PM
Cloud cover
46%
1st clearest
Wind
6 km/h
11th windiest
Solar energy
2.41 kWh/m²
Travel score
2.3
out of 10

Susono is city in Shizuoka Prefecture, Japan.

Density
371/km²
people per km²
Founded
1971

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 12°C in the first days to 8°C by the end.

A typical December day in Susono reaches about 10°C in the afternoon and slips back to 3°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 6°C and 13°C. Set against its neighbours, December runs about 5°C cooler than November and about 3°C warmer than January.

-5°10°15°20°151015202531
Avg high (°C)Avg low (°C)
1125
2125
3125
4115
5114
6114
7114
8114
9114
10104
11103
12103
13103
14103
15103
16103
17103
1892
1992
2092
2192
2292
2392
2492
2592
2692
2792
2891
2981
3081
3181

How December really feels in Susono

Once humidity and wind are folded in, December averages 0 days that feel above 32°C and 7 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
7
wind chill below the day's low

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

Susono weather by month

How December compares with the rest of the year at a glance. December is the 10th-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 9710.14.69.91.1
Feb / 10610.84.810.71.2
Mar11° / 184163.611.72.4
Apr16° / 17814.40.412.94.5
May20° / 13°18614.6013.85.5
Jun23° / 17°24317.8014.35.2
Jul27° / 21°23517.8014.14.9
Aug28° / 22°18516.4013.34.9
Sep25° / 19°26316.7012.25.5
Oct20° / 13°26115.7011.15.4
Nov15° / 13212.1010.24.2
Dec10° / 9010.419.72.3

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 48% of the time in December, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 14% of December, with mostly cloudy or overcast conditions the remaining 38%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15149
25149
35347
45347
55446
65545
75644
85743
95842
105941
116040
126040
136040
146040
156139
166238
176238
186337
196337
206535
216535
226535
236634
246733
256733
266832
276931
286931
297030
307030
317030

Chance of precipitation in December

Any precipitationSnow

Susono gets around 90 mm of rain and snow over 10.4 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 precipitation averages around 33% and peaks near 40% on the wettest days, and about 1 day brings snow. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)Snow chance (%)
1402
2402
3402
4392
5392
6382
7383
8373
9373
10363
11353
12353
13343
14343
15333
16333
17323
18323
19313
20313
21313
22304
23304
24294
25284
26284
27274
28274
29265
30265
31266

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 (%)Comfortable (%)
1991
2991
3991
4991
5991
6991
7991
81000
91000
101000
111000
121000
131000
141000
151000
161000
171000
181000
191000
201000
211000
221000
231000
241000
251000
261000
271000
281000
291000
301000
311000

Wind in December

Winds average 6 km/h in December.

Across December, daily wind ranges from about 6 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 9 h 48 min at the start of December to 9 h 42 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 6:40 AM to 6:58 AM, and sunset from 4:28 PM to 4:37 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.86:404:28
29.86:414:28
39.86:424:28
49.86:434:28
59.76:434:28
69.76:444:28
79.76:454:28
89.76:464:28
99.76:474:28
109.76:474:28
119.76:484:29
129.76:494:29
139.76:494:29
149.76:504:29
159.66:514:30
169.66:514:30
179.66:524:30
189.66:524:30
199.66:534:31
209.66:544:31
219.66:544:32
229.66:554:32
239.66:554:33
249.66:554:33
259.66:564:34
269.66:564:34
279.66:574:35
289.66:574:35
299.66:574:36
309.76:574:37
319.76:584:37

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.41 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.41 kWh/m² to a high of 5.27 kWh/m² in May across the year — December's 2.41 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
182.5Moderate
192.5Moderate
202.5Moderate
212.5Moderate
222.5Moderate
232.5Moderate
242.5Moderate
252.6Moderate
262.6Moderate
272.6Moderate
282.6Moderate
292.6Moderate
302.7Moderate
312.7Moderate
Planning a trip in December

Hazard calendar for Susono

In seasonPeak

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

Susono 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 Susono?

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

2.3
Sightseeing
10th-best month of the year
0.0
Beach & pool
10th-best month of the year

December is a weaker month for outdoor sightseeing in Susono.

What to pack for Susono in December

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

In December, Susono sees daytime highs around 10°C and nights near 3°C. Pack a warm layer. Worth having: rain gear. About 10 days see rain.

a warm layerrain gear

Sea temperature near Susono in December

The nearest coast averages about 18°C in December — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 21 km away) is warmest in August at about 26°C and coldest in February near 15°C.

It's comfortable for a long swim from May 31 to Nov 26 — about 5.9 months when the water holds above 20°C.

15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan16Cool
Feb15Cool
Mar16Cool
Apr17Cool
May19Cool
Jun21Refreshing
Jul24Refreshing
Aug26Warm
Sep25Warm
Oct23Refreshing
Nov21Refreshing
Dec18Cool

UV index in Susono 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 Susono peaks around July 19 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 highExtremeVery highModerateJul 19UV 10Dec 23UV 2
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5Moderate
Apr7High
May9Very high
Jun10Very high
Jul10Extreme
Aug10Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec2Moderate

Air quality in Susono 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 Susono is worst in April — around 23 µg/m³ PM2.5 (moderate), about 2.4× the cleanest month (December, 10 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodApr 1623 µg/m³Dec 1610 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb20Moderate
Mar20Moderate
Apr23Moderate
May20Moderate
Jun17Moderate
Jul13Moderate
Aug12Good
Sep12Good
Oct12Good
Nov11Good
Dec10Good
Location & terrain

Where is Susono?

Susono sits at 35.2°N, 138.9°E, 133 m above sea level, in Japan. The nearest listed city is Nakatogari, 4.0 km away.

Topography around Susono

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

Within 3 km, the terrain around Susono has significant variations in elevation — a maximum elevation change of 277 m around an average of 169 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,497 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,736 m.

The land around Susono is covered by trees (52%) and artificial surfaces (36%) within 3 km, trees (62%) within 16 km, and trees (48%) and water (38%) within 80 km.

3 km
277 m
16 km
1,497 m
80 km
3,736 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Nakatogari 4.0 km · Mishima 6.0 km · Fushimi 7.0 km · Numazu 9.0 km · Kamizawa 9.0 km · Hakone 11 km · Yugawara 15 km · Izunokuni 16 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 Susono (35.1739°, 138.9069°, elevation 133 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).