Chichibu weather in December

In December, Chichibu sees average daytime highs of 9°C and overnight lows near 1°C, with 64 mm of precipitation across 8.3 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 11°C in the first days to 7°C by the end. The sky is clear or mostly clear about 57% of the time in December, and the air most often feels dry.

Daylight stretches from about 9 h 42 min at the start of December to 9 h 36 min by month's end. Set against the rest of the year, December is Chichibu's 2nd-clearest and 4th-windiest month. For the whole year in context, see Chichibu's year-round climate.

Daytime high
10th warmest
Overnight low
3rd coldest
Precipitation
64 mm
8.3 wet days
Daylight
9 h 36 min
6:53 AM – 4:27 PM
Cloud cover
41%
2nd clearest
Wind
7 km/h
4th windiest
Solar energy
2.49 kWh/m²
Travel score
1.9
out of 10

Chichibu is city in Saitama prefecture, Japan.

Density
106/km²
people per km²
Founded
2005

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 11°C in the first days to 7°C by the end.

A typical December day in Chichibu reaches about 9°C in the afternoon and slips back to 1°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 5°C and 13°C. Set against its neighbours, December runs about 5°C cooler than November and about 2°C warmer than January.

-5°10°15°151015202531
Avg high (°C)Avg low (°C)
1113
2112
3112
4102
5102
6102
7102
8102
9101
1091
1191
1291
1391
1491
1591
1690
1790
1880
1980
2080
2180
2280
2380
2480
258-1
268-1
278-1
287-1
297-1
307-1
317-1

How December really feels in Chichibu

Once humidity and wind are folded in, December averages 0 days that feel above 32°C and 25 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
25
wind chill below the day's low

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

Chichibu 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 / -2°718.35.49.80.6
Feb / -2°739.75.710.60.9
Mar11° / 13815.25.911.72.2
Apr16° / 15715.21.212.94.3
May20° / 11°19517.2013.95.2
Jun23° / 16°26622.2014.44.5
Jul26° / 20°31825.1014.24.2
Aug27° / 21°26724.7013.44.3
Sep23° / 17°28121.2012.24.8
Oct18° / 11°24817.6011.14.8
Nov14° / 9310.70.310.13.9
Dec / 648.32.39.61.9

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 57% 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 29%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16139
26139
36238
46337
56436
66535
76535
86733
96832
106832
116931
126931
137030
147030
157129
167129
177228
187228
197327
207327
217327
227426
237525
247624
257624
267624
277723
287723
297723
307723
317723

Chance of precipitation in December

Any precipitationSnow

Chichibu gets around 64 mm of rain and snow over 8.3 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 27% and peaks near 35% on the wettest days, and about 2 days bring snow. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)Snow chance (%)
1354
2354
3345
4345
5335
6335
7325
8316
9306
10296
11286
12286
13277
14267
15257
16257
17247
18247
19238
20238
21238
22228
23228
24229
25229
26229
27229
28229
29229
302210
312310

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 7 km/h in December.

Across December, daily wind ranges from about 6 km/h on the calmest days to 7 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
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 9 h 42 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 6 minutes over December. Sunrise moves from 6:41 AM to 6:59 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)
19.76:414:25
29.76:424:25
39.76:434:25
49.76:444:25
59.76:454:25
69.76:464:25
79.66:464:25
89.66:474:25
99.66:484:25
109.66:494:26
119.66:494:26
129.66:504:26
139.66:514:26
149.66:524:26
159.66:524:27
169.66:534:27
179.66:534:27
189.66:544:28
199.66:554:28
209.66:554:28
219.66:564:29
229.66:564:29
239.66:574:30
249.66:574:30
259.66:574:31
269.66:584:31
279.66:584:32
289.66:584:33
299.66:594:33
309.66:594:34
319.66:594:34

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.49 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.49 kWh/m² to a high of 5.21 kWh/m² in May across the year — December's 2.49 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
112.5Moderate
122.5Moderate
132.5Moderate
142.5Moderate
152.5Moderate
162.5Moderate
172.5Moderate
182.5Moderate
192.5Moderate
202.5Moderate
212.6Moderate
222.6Moderate
232.6Moderate
242.6Moderate
252.6Moderate
262.7Moderate
272.7Moderate
282.7Moderate
292.7Moderate
302.8Moderate
312.8Moderate
Planning a trip in December

Hazard calendar for Chichibu

In seasonPeak

None of Chichibu's seasonal hazards are active in December. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Chichibu's rainy season runs April–October, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is December a good time to visit Chichibu?

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

1.9
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 Chichibu.

What to pack for Chichibu in December

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

In December, Chichibu sees daytime highs around 9°C and nights near 1°C. Pack a warm layer. Worth having: rain gear. About 8 days see rain.

a warm layerrain gear

UV index in Chichibu 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 Chichibu peaks around July 15 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 highModerateJul 15UV 10Dec 23UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar4Moderate
Apr7High
May8Very high
Jun9Very high
Jul10Very high
Aug9Very high
Sep8Very high
Oct6High
Nov3Moderate
Dec2Moderate

Air quality in Chichibu 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 Chichibu 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 1821 µg/m³Dec 1810 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb14Moderate
Mar19Moderate
Apr21Moderate
May20Moderate
Jun18Moderate
Jul15Moderate
Aug14Moderate
Sep13Moderate
Oct12Moderate
Nov11Good
Dec10Good
Location & terrain

Where is Chichibu?

Chichibu sits at 36.0°N, 139.1°E, 236 m above sea level, in Japan. The nearest listed city is Yorii, 18 km away.

Topography around Chichibu

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

Within 3 km, the terrain around Chichibu has significant variations in elevation — a maximum elevation change of 424 m around an average of 280 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,713 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,737 m.

The land around Chichibu is covered by trees (56%) and artificial surfaces (33%) within 3 km, trees (92%) within 16 km, and trees (61%) and artificial surfaces (24%) within 80 km.

3 km
424 m
16 km
1,713 m
80 km
3,737 m
treesgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Yorii 18 km · Ogawamachi 18 km · Morohongō 21 km · Kodamachō-kodamaminami 22 km · Ranzan 23 km · Hannō 27 km · Hidaka 27 km · Ōme 27 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 Chichibu (35.9903°, 139.0764°, elevation 236 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. 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).