Sakaki weather in December

In December, Sakaki sees average daytime highs of 6°C and overnight lows near -3°C, with 88 mm of precipitation across 16.1 wet days and about 9.6 hours of daylight. It is the 10th-warmest and 10th-wettest month of the year here.

Highs ease over the month, from about 8°C in the first days to 4°C by the end. The sky is clear or mostly clear about 25% 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 30 min by month's end. Set against the rest of the year, December is Sakaki's 2nd-clearest and 6th-windiest month. For the whole year in context, see Sakaki's year-round climate.

Daytime high: 6°; 10th warmest
Overnight low: -3°; 3rd coldest
Precipitation: 88 mm; 16.1 wet days
Daylight: 9 h 30 min; 6:58 AM – 4:29 PM
Cloud cover: 58%; 2nd clearest
Wind: 5 km/h; 6th windiest
Solar energy: 2.33 kWh/m²
Travel score: 0.4; out of 10

← November Sakaki year-round climate January →Best places to visit in December

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

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 8°C in the first days to 4°C by the end.

A typical December day in Sakaki reaches about 6°C in the afternoon and slips back to -3°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 1°C and 10°C. Set against its neighbours, December runs about 6°C cooler than November and about 3°C warmer than January.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Avg high (°C)	8	8	8	8	7	7	7	7	7	6	6	6	6	6	5	5	5	5	5	5	5	4	4	4	4	4	4	4	4	3	3
Avg low (°C)	0	0	-1	-1	-1	-1	-1	-1	-2	-2	-2	-2	-2	-2	-2	-3	-3	-3	-3	-3	-3	-3	-3	-4	-4	-4	-4	-4	-4	-4	-4

	Avg high (°C)	Avg low (°C)
1	8	0
2	8	0
3	8	-1
4	8	-1
5	7	-1
6	7	-1
7	7	-1
8	7	-1
9	7	-2
10	6	-2
11	6	-2
12	6	-2
13	6	-2
14	6	-2
15	5	-2
16	5	-3
17	5	-3
18	5	-3
19	5	-3
20	5	-3
21	5	-3
22	4	-3
23	4	-3
24	4	-4
25	4	-4
26	4	-4
27	4	-4
28	4	-4
29	4	-4
30	3	-4
31	3	-4

How December really feels in Sakaki

Once humidity and wind are folded in, December averages 0 days that feel above 32°C and 31 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C

heat index over the day's high

Days feeling ≤ 0°C

wind chill below the day's low

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

Sakaki weather by month

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

Month	High / Low (°C)	Rainfall (mm)	Wet days	Snow days	Daylight (hours)	Travel score
Jan	3° / -5°	90	16.5	18.2	9.8	0.0
Feb	4° / -5°	84	13.6	13.8	10.6	0.0
Mar	8° / -2°	118	15.3	11.6	11.7	1.1
Apr	14° / 3°	107	13.5	3	12.9	3.9
May	20° / 9°	123	13.9	0.1	13.9	5.7
Jun	23° / 14°	168	17.2	0	14.4	5.4
Jul	27° / 18°	209	20.3	0	14.2	4.9
Aug	28° / 19°	134	16.2	0	13.4	5.1
Sep	24° / 15°	161	15.3	0	12.2	5.7
Oct	18° / 9°	150	14.2	0.1	11.1	5.1
Nov	12° / 2°	87	12.9	3.8	10.1	2.8
Dec	6° / -3°	88	16.1	14.5	9.6	0.4

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 25% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 24% of December, with mostly cloudy or overcast conditions the remaining 51%.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Clearer (%)	50	50	50	49	49	50	50	49	49	49	49	49	48	48	48	49	48	48	49	49	50	49	50	50	50	50	50	50	50	50	50
Cloudier (%)	50	50	50	51	51	50	50	51	51	51	51	51	52	52	52	51	52	52	51	51	50	51	50	50	50	50	50	50	50	50	50

	Clearer (%)	Cloudier (%)
1	50	50
2	50	50
3	50	50
4	49	51
5	49	51
6	50	50
7	50	50
8	49	51
9	49	51
10	49	51
11	49	51
12	49	51
13	48	52
14	48	52
15	48	52
16	49	51
17	48	52
18	48	52
19	49	51
20	49	51
21	50	50
22	49	51
23	50	50
24	50	50
25	50	50
26	50	50
27	50	50
28	50	50
29	50	50
30	50	50
31	50	50

Chance of precipitation in December

Any precipitationSnow

Sakaki gets around 88 mm of rain and snow over 16.1 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 51% and peaks near 55% on the wettest days, and about 15 days bring snow. The odds climb toward the end of the month.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Rain chance (%)	47	47	48	48	49	49	50	50	51	51	51	51	51	51	51	51	51	52	52	52	52	53	53	53	54	54	54	55	55	55	55
Snow chance (%)	29	30	32	33	35	37	38	40	41	42	44	44	45	46	46	47	47	48	49	50	51	52	53	54	55	56	56	57	58	59	59

	Rain chance (%)	Snow chance (%)
1	47	29
2	47	30
3	48	32
4	48	33
5	49	35
6	49	37
7	50	38
8	50	40
9	51	41
10	51	42
11	51	44
12	51	44
13	51	45
14	51	46
15	51	46
16	51	47
17	51	47
18	52	48
19	52	49
20	52	50
21	52	51
22	53	52
23	53	53
24	53	54
25	54	55
26	54	56
27	54	56
28	55	57
29	55	58
30	55	59
31	55	59

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.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Dry (%)	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

Wind in December

Winds average 5 km/h in December.

Across December, daily wind ranges from about 5 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Wind speed (km/h)	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	6	6	6	6	6	6	6	6	6	6	6
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm

	Wind speed (km/h)	Feels
1	5	calm
2	5	calm
3	5	calm
4	5	calm
5	5	calm
6	5	calm
7	5	calm
8	5	calm
9	5	calm
10	5	calm
11	5	calm
12	5	calm
13	5	calm
14	5	calm
15	5	calm
16	5	calm
17	5	calm
18	5	calm
19	5	calm
20	5	calm
21	6	calm
22	6	calm
23	6	calm
24	6	calm
25	6	calm
26	6	calm
27	6	calm
28	6	calm
29	6	calm
30	6	calm
31	6	calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 9 h 42 min at the start of December to 9 h 30 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 6:46 AM to 7:04 AM, and sunset from 4:28 PM to 4:37 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Daylight (h)	9.7	9.7	9.7	9.6	9.6	9.6	9.6	9.6	9.6	9.6	9.6	9.6	9.5	9.5	9.5	9.5	9.5	9.5	9.5	9.5	9.5	9.5	9.5	9.5	9.5	9.5	9.5	9.5	9.5	9.5	9.5
Sunrise (AM)	6:46	6:47	6:48	6:49	6:50	6:51	6:51	6:52	6:53	6:54	6:54	6:55	6:56	6:56	6:57	6:58	6:58	6:59	6:59	7:00	7:01	7:01	7:01	7:02	7:02	7:03	7:03	7:03	7:04	7:04	7:04
Sunset (PM)	4:28	4:28	4:28	4:28	4:27	4:27	4:28	4:28	4:28	4:28	4:28	4:28	4:28	4:29	4:29	4:29	4:29	4:30	4:30	4:31	4:31	4:31	4:32	4:32	4:33	4:34	4:34	4:35	4:35	4:36	4:37

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	9.7	6:46	4:28
2	9.7	6:47	4:28
3	9.7	6:48	4:28
4	9.6	6:49	4:28
5	9.6	6:50	4:27
6	9.6	6:51	4:27
7	9.6	6:51	4:28
8	9.6	6:52	4:28
9	9.6	6:53	4:28
10	9.6	6:54	4:28
11	9.6	6:54	4:28
12	9.6	6:55	4:28
13	9.5	6:56	4:28
14	9.5	6:56	4:29
15	9.5	6:57	4:29
16	9.5	6:58	4:29
17	9.5	6:58	4:29
18	9.5	6:59	4:30
19	9.5	6:59	4:30
20	9.5	7:00	4:31
21	9.5	7:01	4:31
22	9.5	7:01	4:31
23	9.5	7:01	4:32
24	9.5	7:02	4:32
25	9.5	7:02	4:33
26	9.5	7:03	4:34
27	9.5	7:03	4:34
28	9.5	7:03	4:35
29	9.5	7:04	4:35
30	9.5	7:04	4:36
31	9.5	7:04	4:37

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.33 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.33 kWh/m² to a high of 5.72 kWh/m² in May across the year — December's 2.33 kWh/m² sits near the bottom.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Solar energy (kWh/m²)	2.4	2.4	2.4	2.4	2.3	2.3	2.3	2.3	2.3	2.3	2.3	2.3	2.3	2.3	2.3	2.3	2.3	2.3	2.4	2.4	2.4	2.4	2.4	2.4	2.4	2.4	2.4	2.4	2.5	2.5	2.5
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	Solar energy (kWh/m²)	Level
1	2.4	Moderate
2	2.4	Moderate
3	2.4	Moderate
4	2.4	Moderate
5	2.3	Moderate
6	2.3	Moderate
7	2.3	Moderate
8	2.3	Moderate
9	2.3	Moderate
10	2.3	Moderate
11	2.3	Moderate
12	2.3	Moderate
13	2.3	Moderate
14	2.3	Moderate
15	2.3	Moderate
16	2.3	Moderate
17	2.3	Moderate
18	2.3	Moderate
19	2.4	Moderate
20	2.4	Moderate
21	2.4	Moderate
22	2.4	Moderate
23	2.4	Moderate
24	2.4	Moderate
25	2.4	Moderate
26	2.4	Moderate
27	2.4	Moderate
28	2.4	Moderate
29	2.5	Moderate
30	2.5	Moderate
31	2.5	Moderate

Planning a trip in December

Is December a good time to visit Sakaki?

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

0.4

Sightseeing

10th-best month of the year

0.0

Beach & pool

9th-best month of the year

December is a weaker month for outdoor sightseeing in Sakaki.

What to pack for Sakaki in December

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

In December, Sakaki sees daytime highs around 6°C and nights near -3°C. Pack a warm layer and rain gear. Worth having: a heavy coat. About 16 days see rain.

a warm layerrain geara heavy coat

UV index in Sakaki 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 Sakaki peaks around July 20 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	3	5	6	7	9	10	10	10	9	6	3	2
Level	Moderate	Moderate	High	Very high	Very high	Very high	Extreme	Extreme	Very high	High	Moderate	Moderate

	UV index (midday)	Level
Jan	3	Moderate
Feb	5	Moderate
Mar	6	High
Apr	7	Very high
May	9	Very high
Jun	10	Very high
Jul	10	Extreme
Aug	10	Extreme
Sep	9	Very high
Oct	6	High
Nov	3	Moderate
Dec	2	Moderate

Air quality in Sakaki 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 Sakaki 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).

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	11	14	20	21	20	18	15	13	12	11	11	10
Level	Good	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Good	Good	Good	Good

	PM2.5 (µg/m³)	Level
Jan	11	Good
Feb	14	Moderate
Mar	20	Moderate
Apr	21	Moderate
May	20	Moderate
Jun	18	Moderate
Jul	15	Moderate
Aug	13	Moderate
Sep	12	Good
Oct	11	Good
Nov	11	Good
Dec	10	Good

Location & terrain

Where is Sakaki?

Sakaki sits at 36.5°N, 138.2°E, 416 m above sea level, in Japan. The nearest listed city is Chikuma, 11 km away.

Topography around Sakaki

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

Within 3 km, the terrain around Sakaki has large variations in elevation — a maximum elevation change of 716 m around an average of 573 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,306 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,130 m.

The land around Sakaki is covered by trees (57%) and artificial surfaces (22%) within 3 km, trees (71%) within 16 km, and trees (83%) within 80 km.

3 km

716 m

trees 57%

16 km

1,306 m

trees 71%

80 km

3,130 m

trees 83%

treesgrasslandcroplandartificial surfacesbare terrainwater

← November Sakaki year-round climate January →Best places to visit in December

December weather nearby: Chikuma 11 km · Ueda 11 km · Kamimaruko 18 km · Tōmi 20 km · Nagano 20 km · Suzaka 24 km · Komoro 28 km · Ōmachi 29 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

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 Sakaki (36.4667°, 138.1833°, elevation 416 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).

	Avg high (°C)	Avg low (°C)
1	8	0
2	8	0
3	8	-1
4	8	-1
5	7	-1
6	7	-1
7	7	-1
8	7	-1
9	7	-2
10	6	-2
11	6	-2
12	6	-2
13	6	-2
14	6	-2
15	5	-2
16	5	-3
17	5	-3
18	5	-3
19	5	-3
20	5	-3
21	5	-3
22	4	-3
23	4	-3
24	4	-4
25	4	-4
26	4	-4
27	4	-4
28	4	-4
29	4	-4
30	3	-4
31	3	-4

	Clearer (%)	Cloudier (%)
1	50	50
2	50	50
3	50	50
4	49	51
5	49	51
6	50	50
7	50	50
8	49	51
9	49	51
10	49	51
11	49	51
12	49	51
13	48	52
14	48	52
15	48	52
16	49	51
17	48	52
18	48	52
19	49	51
20	49	51
21	50	50
22	49	51
23	50	50
24	50	50
25	50	50
26	50	50
27	50	50
28	50	50
29	50	50
30	50	50
31	50	50

	Rain chance (%)	Snow chance (%)
1	47	29
2	47	30
3	48	32
4	48	33
5	49	35
6	49	37
7	50	38
8	50	40
9	51	41
10	51	42
11	51	44
12	51	44
13	51	45
14	51	46
15	51	46
16	51	47
17	51	47
18	52	48
19	52	49
20	52	50
21	52	51
22	53	52
23	53	53
24	53	54
25	54	55
26	54	56
27	54	56
28	55	57
29	55	58
30	55	59
31	55	59

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

	Avg high (°C)	Avg low (°C)
1	8	0
2	8	0
3	8	-1
4	8	-1
5	7	-1
6	7	-1
7	7	-1
8	7	-1
9	7	-2
10	6	-2
11	6	-2
12	6	-2
13	6	-2
14	6	-2
15	5	-2
16	5	-3
17	5	-3
18	5	-3
19	5	-3
20	5	-3
21	5	-3
22	4	-3
23	4	-3
24	4	-4
25	4	-4
26	4	-4
27	4	-4
28	4	-4
29	4	-4
30	3	-4
31	3	-4

	Clearer (%)	Cloudier (%)
1	50	50
2	50	50
3	50	50
4	49	51
5	49	51
6	50	50
7	50	50
8	49	51
9	49	51
10	49	51
11	49	51
12	49	51
13	48	52
14	48	52
15	48	52
16	49	51
17	48	52
18	48	52
19	49	51
20	49	51
21	50	50
22	49	51
23	50	50
24	50	50
25	50	50
26	50	50
27	50	50
28	50	50
29	50	50
30	50	50
31	50	50

	Rain chance (%)	Snow chance (%)
1	47	29
2	47	30
3	48	32
4	48	33
5	49	35
6	49	37
7	50	38
8	50	40
9	51	41
10	51	42
11	51	44
12	51	44
13	51	45
14	51	46
15	51	46
16	51	47
17	51	47
18	52	48
19	52	49
20	52	50
21	52	51
22	53	52
23	53	53
24	53	54
25	54	55
26	54	56
27	54	56
28	55	57
29	55	58
30	55	59
31	55	59

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

	Avg high (°C)	Avg low (°C)
1	8	0
2	8	0
3	8	-1
4	8	-1
5	7	-1
6	7	-1
7	7	-1
8	7	-1
9	7	-2
10	6	-2
11	6	-2
12	6	-2
13	6	-2
14	6	-2
15	5	-2
16	5	-3
17	5	-3
18	5	-3
19	5	-3
20	5	-3
21	5	-3
22	4	-3
23	4	-3
24	4	-4
25	4	-4
26	4	-4
27	4	-4
28	4	-4
29	4	-4
30	3	-4
31	3	-4

	Clearer (%)	Cloudier (%)
1	50	50
2	50	50
3	50	50
4	49	51
5	49	51
6	50	50
7	50	50
8	49	51
9	49	51
10	49	51
11	49	51
12	49	51
13	48	52
14	48	52
15	48	52
16	49	51
17	48	52
18	48	52
19	49	51
20	49	51
21	50	50
22	49	51
23	50	50
24	50	50
25	50	50
26	50	50
27	50	50
28	50	50
29	50	50
30	50	50
31	50	50

	Rain chance (%)	Snow chance (%)
1	47	29
2	47	30
3	48	32
4	48	33
5	49	35
6	49	37
7	50	38
8	50	40
9	51	41
10	51	42
11	51	44
12	51	44
13	51	45
14	51	46
15	51	46
16	51	47
17	51	47
18	52	48
19	52	49
20	52	50
21	52	51
22	53	52
23	53	53
24	53	54
25	54	55
26	54	56
27	54	56
28	55	57
29	55	58
30	55	59
31	55	59

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100