Kashiwa weather in December

In December, Kashiwa sees average daytime highs of 11°C and overnight lows near 5°C, with 63 mm of precipitation across 7.7 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 56% 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 Kashiwa's 2nd-clearest and 11th-windiest month. For the whole year in context, see Kashiwa's year-round climate.

Daytime high
11°
10th warmest
Overnight low
3rd coldest
Precipitation
63 mm
7.7 wet days
Daylight
9 h 36 min
6:49 AM – 4:24 PM
Cloud cover
41%
2nd clearest
Wind
12 km/h
11th windiest
Solar energy
2.32 kWh/m²
Travel score
3.2
out of 10

Kashiwa is city in Chiba Prefecture, Japan.

Density
3,778/km²
people per km²
Founded
1954

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 13°C in the first days to 10°C by the end.

A typical December day in Kashiwa reaches about 11°C in the afternoon and slips back to 5°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 8°C and 15°C. Set against its neighbours, December runs about 5°C cooler than November and about 3°C warmer than January.

10°15°20°151015202531
Avg high (°C)Avg low (°C)
1137
2137
3137
4136
5136
6136
7126
8126
9126
10125
11125
12125
13125
14115
15115
16114
17114
18114
19114
20114
21114
22114
23104
24103
25103
26103
27103
28103
29103
30103
31103

How December really feels in Kashiwa

Once humidity and wind are folded in, December averages 0 days that feel above 32°C and 6 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
6
wind chill below the day's low

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

Kashiwa 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 / 706.80.89.82.0
Feb10° / 667.91.510.62.2
Mar13° / 12012.20.711.73.4
Apr17° / 10°11411.9012.95.3
May22° / 15°13111.6013.96.2
Jun25° / 19°16113.7014.45.8
Jul28° / 23°15313.7014.25.1
Aug30° / 24°11211.8013.44.8
Sep26° / 21°17514.2012.25.7
Oct21° / 15°20712.9011.16.1
Nov16° / 10°9810.1010.15.1
Dec11° / 637.70.19.63.2

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 56% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 13% of December, with mostly cloudy or overcast conditions the remaining 31%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16040
26139
36139
46238
56238
66337
76535
86535
96634
106634
116733
126832
136832
146931
156931
166931
177030
187030
197129
207129
217228
227228
237327
247327
257426
267426
277525
287525
297525
307624
317624

Chance of precipitation in December

Any precipitation

Kashiwa gets around 63 mm of rain and snow over 7.7 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
232
332
432
531
631
730
830
929
1028
1128
1227
1326
1425
1524
1624
1723
1822
1922
2021
2121
2220
2320
2419
2519
2618
2718
2818
2917
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 (%)
1982
2982
3982
4982
5982
6982
7991
8991
9991
10991
11991
12991
13991
14991
151000
161000
171000
181000
191000
201000
211000
221000
231000
241000
251000
261000
271000
281000
291000
301000
311000

Wind in December

Winds average 12 km/h in December.

Across December, daily wind ranges from about 12 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
112calm
212calm
312calm
412calm
512calm
612calm
712calm
812calm
912calm
1012calm
1112calm
1212calm
1312calm
1412calm
1512light breeze
1612light breeze
1712light breeze
1812light breeze
1912light breeze
2012light breeze
2112light breeze
2212light breeze
2312light breeze
2412light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze
3113light breeze

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 6:38 AM to 6:55 AM, and sunset from 4:22 PM to 4:31 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.76:384:22
29.76:384:22
39.76:394:22
49.76:404:22
59.76:414:22
69.76:424:22
79.76:434:22
89.66:434:22
99.66:444:22
109.66:454:22
119.66:464:22
129.66:464:23
139.66:474:23
149.66:484:23
159.66:484:23
169.66:494:24
179.66:494:24
189.66:504:24
199.66:514:25
209.66:514:25
219.66:524:26
229.66:524:26
239.66:534:26
249.66:534:27
259.66:534:28
269.66:544:28
279.66:544:29
289.66:544:29
299.66:554:30
309.66:554:31
319.66:554:31

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.32 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.32 kWh/m² to a high of 5.16 kWh/m² in May across the year — December's 2.32 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
82.3Moderate
92.3Moderate
102.3Moderate
112.3Moderate
122.3Moderate
132.3Moderate
142.3Moderate
152.3Moderate
162.3Moderate
172.3Moderate
182.4Moderate
192.4Moderate
202.4Moderate
212.4Moderate
222.4Moderate
232.5Moderate
242.5Moderate
252.5Moderate
262.5Moderate
272.5Moderate
282.6Moderate
292.6Moderate
302.6Moderate
312.6Moderate
Planning a trip in December

Hazard calendar for Kashiwa

In seasonPeak

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

Kashiwa 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 Kashiwa?

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

3.2
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 Kashiwa.

What to pack for Kashiwa in December

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

In December, Kashiwa sees daytime highs around 11°C and nights near 5°C. Pack a warm layer. About 8 days see rain.

a warm layer

Sea temperature near Kashiwa 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 28 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 Kashiwa 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 Kashiwa peaks around July 21 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 21UV 10Dec 23UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar4Moderate
Apr6High
May8Very high
Jun9Very high
Jul10Very high
Aug10Very high
Sep9Very high
Oct6High
Nov3Moderate
Dec2Moderate

Air quality in Kashiwa 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 Kashiwa is worst in March — around 25 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (December, 14 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMar 2425 µg/m³Dec 1914 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb18Moderate
Mar25Moderate
Apr25Moderate
May24Moderate
Jun19Moderate
Jul16Moderate
Aug15Moderate
Sep15Moderate
Oct16Moderate
Nov16Moderate
Dec14Moderate
Location & terrain

Where is Kashiwa?

Kashiwa sits at 35.9°N, 140.0°E, 24 m above sea level, in Japan. The nearest listed city is Abiko, 4.0 km away.

Topography around Kashiwa

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

Within 3 km, the terrain around Kashiwa has only modest variations in elevation — a maximum elevation change of 46 m around an average of 18 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 51 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,431 m.

The land around Kashiwa is covered by artificial surfaces (73%) within 3 km, artificial surfaces (50%), cropland (21%) and trees (20%) within 16 km, and trees (32%) and artificial surfaces (28%) within 80 km.

3 km
46 m
16 km
51 m
80 km
1,431 m
treesgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Abiko 4.0 km · Nagareyama 7.0 km · Minaminagareyama 8.0 km · Moriya 8.0 km · Misato, Saitama 9.0 km · Toride 10 km · Kamagaya 11 km · Shiroi 11 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 Kashiwa (35.8622°, 139.9773°, elevation 24 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).