Tateyama weather in December

In December, Tateyama sees average daytime highs of 14°C and overnight lows near 10°C, with 88 mm of rain across 10.1 wet days and about 9.7 hours of daylight. It is the 9th-warmest and 12th-wettest month of the year here.

Highs ease over the month, from about 15°C in the first days to 12°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 Tateyama's 1st-clearest and 3rd-windiest month. For the whole year in context, see Tateyama's year-round climate.

Daytime high
14°
9th warmest
Overnight low
10°
4th coldest
Rainfall
88 mm
10.1 wet days
Daylight
9 h 42 min
6:47 AM – 4:26 PM
Cloud cover
46%
1st clearest
Wind
26 km/h
3rd windiest
Solar energy
2.31 kWh/m²
Travel score
4.2
out of 10

Tateyama is city in Chiba Prefecture, Japan.

Density
455/km²
people per km²
Founded
1939

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 15°C in the first days to 12°C by the end.

A typical December day in Tateyama reaches about 14°C in the afternoon and slips back to 10°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 11°C and 17°C. Set against its neighbours, December runs about 4°C cooler than November and about 3°C warmer than January.

10°15°20°151015202531
Avg high (°C)Avg low (°C)
11612
21612
31612
41512
51512
61512
71512
81511
91511
101511
111411
121411
131411
141411
151410
161410
171410
181410
191310
201310
211310
221310
23139
24139
25139
26139
27139
28139
29129
30129
31129

Tateyama 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
Jan11° / 969.59.93.0
Feb11° / 969.910.72.9
Mar14° / 10°16214.111.73.6
Apr16° / 14°13511.612.95.0
May19° / 17°14810.913.86.0
Jun22° / 20°2101314.35.8
Jul25° / 23°14610.714.16.6
Aug26° / 25°100913.36.8
Sep25° / 23°19513.312.26.2
Oct22° / 19°24113.511.16.1
Nov18° / 15°13811.910.25.6
Dec14° / 10°8810.19.74.2

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 18% of December, with mostly cloudy or overcast conditions the remaining 34%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15941
25941
36040
46040
56139
66139
76238
86337
96337
106535
116535
126535
136535
146634
156634
166634
176634
186733
196733
206733
216832
226832
236832
246832
256931
266931
277030
287030
297030
307030
317129

Chance of precipitation in December

Any precipitation

Tateyama gets around 88 mm of rain over 10.1 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 32% and peaks near 40% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
140
240
340
439
539
639
738
837
937
1036
1135
1234
1333
1433
1532
1631
1730
1830
1929
2028
2128
2227
2327
2427
2526
2626
2726
2826
2926
3026
3126

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 97% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
19262
29262
39361
49451
59451
69451
79541
89541
99631
109730
119730
129820
139820
149820
159820
169910
179910
189910
199910
209910
219910
229910
239910
249910
259910
269910
2710000
2810000
2910000
3010000
3110000

Wind in December

Winds average 26 km/h in December.

Across December, daily wind ranges from about 26 km/h on the calmest days to 26 km/h at its breeziest. It stays fairly steady from day to day.

0102030151015202531
Wind speed (km/h)Feels
126breezy
226breezy
326breezy
426breezy
526breezy
626breezy
726breezy
826breezy
926breezy
1026breezy
1126breezy
1226breezy
1326breezy
1426breezy
1526breezy
1626breezy
1726breezy
1826breezy
1926breezy
2026breezy
2126breezy
2226breezy
2326breezy
2426breezy
2526breezy
2626breezy
2726breezy
2826breezy
2926breezy
3026breezy
3126breezy

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 6:36 AM to 6:53 AM, and sunset from 4:25 PM to 4:34 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.86:364:25
29.86:374:25
39.86:374:25
49.86:384:25
59.86:394:25
69.76:404:25
79.76:414:25
89.76:414:25
99.76:424:25
109.76:434:25
119.76:444:25
129.76:444:25
139.76:454:26
149.76:464:26
159.76:464:26
169.76:474:26
179.76:484:27
189.76:484:27
199.66:494:28
209.66:494:28
219.66:504:28
229.66:504:29
239.66:514:29
249.66:514:30
259.66:514:30
269.76:524:31
279.76:524:32
289.76:534:32
299.76:534:33
309.76:534:33
319.76:534:34

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.31 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.31 kWh/m² to a high of 5.41 kWh/m² in May across the year — December's 2.31 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
192.4Moderate
202.4Moderate
212.4Moderate
222.4Moderate
232.4Moderate
242.4Moderate
252.4Moderate
262.5Moderate
272.5Moderate
282.5Moderate
292.5Moderate
302.5Moderate
312.5Moderate
Planning a trip in December

Hazard calendar for Tateyama

In seasonPeak

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

Tateyama 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 Tateyama?

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

4.2
Sightseeing
9th-best month of the year
0.1
Beach & pool
9th-best month of the year

December is a reasonable time to visit Tateyama for sightseeing.

What to pack for Tateyama in December

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

In December, Tateyama sees daytime highs around 14°C and nights near 10°C. Worth packing: a warm layer, rain gear and a windbreaker. About 10 days see rain.

a warm layerrain geara windbreaker

Sea temperature near Tateyama in December

The nearest coast averages about 19°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 26°C and coldest in February near 16°C.

It's comfortable for a long swim from May 25 to Dec 4 — about 6.4 months when the water holds above 20°C.

15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan17Cool
Feb16Cool
Mar16Cool
Apr17Cool
May19Cool
Jun22Refreshing
Jul24Refreshing
Aug26Warm
Sep26Warm
Oct24Refreshing
Nov22Refreshing
Dec19Cool

UV index in Tateyama in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 3. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Tateyama peaks around August 10 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 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 highExtremeVery highHighModerateAug 10UV 10Dec 23UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5Moderate
Apr7High
May9Very high
Jun10Very high
Jul10Extreme
Aug10Extreme
Sep8Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Tateyama 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 Tateyama is worst in April — around 26 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (December, 12 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1525 µg/m³Dec 1612 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb25Moderate
Mar23Moderate
Apr26Moderate
May21Moderate
Jun18Moderate
Jul13Moderate
Aug12Moderate
Sep12Moderate
Oct14Moderate
Nov14Moderate
Dec12Good
Location & terrain

Where is Tateyama?

Tateyama sits at 35.0°N, 139.9°E, 7 m above sea level, in Japan. The nearest listed city is Minamibōsō, 8.0 km away.

Topography around Tateyama

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

Within 3 km, the terrain around Tateyama has only modest variations in elevation — a maximum elevation change of 159 m around an average of 31 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 354 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,372 m.

The land around Tateyama is covered by trees (45%) and artificial surfaces (26%) within 3 km, water (59%) and trees (32%) within 16 km, and water (66%) within 80 km.

3 km
159 m
16 km
354 m
80 km
1,372 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Minamibōsō 8.0 km · Kamogawa 25 km · Miura 28 km · Kurihama 31 km · Futtsu 37 km · Yokosuka 38 km · Kimitsu 41 km · Hayama 42 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 Tateyama (34.9833°, 139.8667°, elevation 7 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).