Den’enchōfu weather in December

In December, Den’enchōfu sees average daytime highs of 12°C and overnight lows near 6°C, with 63 mm of precipitation across 7.4 wet days and about 9.6 hours of daylight. It is the 10th-warmest and 12th-wettest month of the year here.

Highs ease over the month, from about 13°C in the first days to 10°C by the end. The sky is clear or mostly clear about 55% 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 36 min by month's end. Set against the rest of the year, December is Den’enchōfu's 2nd-clearest and 9th-windiest month. For the whole year in context, see Den’enchōfu's year-round climate.

Daytime high
12°
10th warmest
Overnight low
3rd coldest
Precipitation
63 mm
7.4 wet days
Daylight
9 h 36 min
6:49 AM – 4:26 PM
Cloud cover
42%
2nd clearest
Wind
15 km/h
9th windiest
Solar energy
2.28 kWh/m²
Travel score
3.4
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 13°C in the first days to 10°C by the end.

A typical December day in Den’enchōfu reaches about 12°C in the afternoon and slips back to 6°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 9°C and 15°C. Set against its neighbours, December runs about 5°C cooler than November and about 2°C warmer than January.

10°15°20°151015202531
Avg high (°C)Avg low (°C)
1149
2149
3138
4138
5138
6138
7138
8138
9137
10127
11127
12127
13127
14127
15126
16126
17126
18116
19116
20116
21116
22116
23115
24115
25115
26115
27115
28105
29105
30105
31105

How December really feels in Den’enchōfu

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.

Den’enchōfu 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 / 7270.99.92.2
Feb10° / 707.81.410.72.3
Mar13° / 12712.20.611.73.4
Apr17° / 12°11511.8012.95.1
May21° / 16°12811.1013.96.2
Jun24° / 20°16412.7014.46.0
Jul27° / 23°14112.1014.25.8
Aug29° / 25°10210.6013.35.5
Sep26° / 22°17513.4012.26.0
Oct21° / 17°21012.8011.16.2
Nov16° / 11°9710010.15.2
Dec12° / 637.40.19.63.4

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 55% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 14% of December, with mostly cloudy or overcast conditions the remaining 32%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16040
26040
36238
46238
56337
66337
76535
86535
96634
106634
116733
126733
136733
146832
156832
166931
176931
186931
197030
207030
217129
227228
237228
247228
257327
267327
277426
287426
297525
307525
317624

Chance of precipitation in December

Any precipitation

Den’enchōfu gets around 63 mm of rain and snow over 7.4 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 24% and peaks near 32% on the wettest days, and about 0 day brings snow. The odds ease toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)
132
231
331
431
530
630
729
829
928
1027
1126
1226
1325
1424
1524
1623
1722
1822
1921
2021
2120
2220
2319
2419
2519
2618
2718
2818
2918
3017
3117

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 99% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)
1973
2973
3973
4982
5982
6982
7982
8982
9991
10991
11991
12991
13991
14991
15991
161000
171000
181000
191000
201000
211000
221000
231000
241000
251000
261000
271000
281000
291000
301000
311000

Wind in December

Winds average 15 km/h in December.

Across December, daily wind ranges from about 15 km/h on the calmest days to 16 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
115light breeze
215light breeze
315light breeze
415light breeze
515light breeze
615light breeze
715light breeze
815light breeze
915light breeze
1015light breeze
1115light breeze
1215light breeze
1315light breeze
1415light breeze
1515light breeze
1615light breeze
1715light breeze
1815light breeze
1915light breeze
2015light breeze
2115light breeze
2215light breeze
2315light breeze
2415light breeze
2515light breeze
2615light breeze
2715light breeze
2815light breeze
2916light breeze
3016light breeze
3116light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 9 h 48 min at the start of December to 9 h 36 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 6:38 AM to 6:56 AM, and sunset from 4:24 PM to 4:33 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.86:384:24
29.86:394:24
39.76:404:24
49.76:414:24
59.76:414:24
69.76:424:24
79.76:434:24
89.76:444:24
99.76:454:24
109.66:454:24
119.66:464:24
129.66:474:25
139.66:474:25
149.66:484:25
159.66:494:25
169.66:494:26
179.66:504:26
189.66:514:26
199.66:514:27
209.66:524:27
219.66:524:28
229.66:534:28
239.66:534:28
249.66:544:29
259.66:544:30
269.66:544:30
279.66:554:31
289.66:554:31
299.66:554:32
309.66:564:33
319.66:564:33

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.28 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.28 kWh/m² to a high of 5.12 kWh/m² in May across the year — December's 2.28 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.2Moderate
22.2Moderate
32.2Moderate
42.2Moderate
52.2Moderate
62.2Moderate
72.2Moderate
82.2Moderate
92.2Moderate
102.2Moderate
112.2Moderate
122.2Moderate
132.3Moderate
142.3Moderate
152.3Moderate
162.3Moderate
172.3Moderate
182.3Moderate
192.3Moderate
202.3Moderate
212.4Moderate
222.4Moderate
232.4Moderate
242.4Moderate
252.4Moderate
262.5Moderate
272.5Moderate
282.5Moderate
292.5Moderate
302.5Moderate
312.6Moderate
Planning a trip in December

Hazard calendar for Den’enchōfu

In seasonPeak

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

Den’enchōfu 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 Den’enchōfu?

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

3.4
Sightseeing
9th-best month of the year
0.0
Beach & pool
10th-best month of the year

December is a weaker month for outdoor sightseeing in Den’enchōfu.

What to pack for Den’enchōfu in December

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

In December, Den’enchōfu sees daytime highs around 12°C and nights near 6°C. Pack a warm layer. About 7 days see rain.

a warm layer

Sea temperature near Den’enchōfu in December

The nearest coast averages about 16°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 19 km away) is warmest in August at about 26°C and coldest in February near 13°C.

It's comfortable for a long swim from Jun 7 to Nov 3 — about 4.9 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb13Bracing
Mar13Bracing
Apr15Cool
May18Cool
Jun21Refreshing
Jul23Refreshing
Aug26Warm
Sep25Warm
Oct22Refreshing
Nov19Cool
Dec16Cool

UV index in Den’enchōfu 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 Den’enchōfu peaks around July 20 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 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 highModerateJul 20UV 10Jan 1UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar4Moderate
Apr7High
May8Very high
Jun9Very high
Jul10Very high
Aug10Very high
Sep9Very high
Oct6High
Nov3Moderate
Dec2Moderate

Air quality in Den’enchōfu 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 Den’enchōfu 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 Den’enchōfu?

Den’enchōfu sits at 35.6°N, 139.7°E, 44 m above sea level, in Japan. The nearest listed city is Ebara, 4.0 km away.

Topography around Den’enchōfu

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

Within 3 km, the terrain around Den’enchōfu has only modest variations in elevation — a maximum elevation change of 50 m around an average of 23 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 137 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,092 m.

The land around Den’enchōfu is covered by artificial surfaces (87%) within 3 km, artificial surfaces (74%) within 16 km, and trees (37%), artificial surfaces (25%) and water (23%) within 80 km.

3 km
50 m
16 km
137 m
80 km
2,092 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Ebara 4.0 km · Yōga 4.0 km · Ikegami 4.0 km · Nakanobu 4.0 km · Togoshi 5.0 km · Meguro 5.0 km · Setagaya 5.0 km · Wakabayashi 6.0 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 Den’enchōfu (35.5955°, 139.6653°, elevation 44 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).