Yamoto weather in December

In December, Yamoto sees average daytime highs of 8°C and overnight lows near 3°C, with 56 mm of precipitation across 8.8 wet days and about 9.4 hours of daylight. It is the 10th-warmest and 10th-wettest month of the year here.

Highs ease over the month, from about 10°C in the first days to 6°C by the end. The sky is clear or mostly clear about 37% of the time in December, and the air most often feels dry.

Daylight stretches from about 9 h 30 min at the start of December to 9 h 24 min by month's end. Set against the rest of the year, December is Yamoto's 2nd-clearest and 3rd-windiest month. For the whole year in context, see Yamoto's year-round climate.

Daytime high
10th warmest
Overnight low
4th coldest
Precipitation
56 mm
8.8 wet days
Daylight
9 h 18 min
6:51 AM – 4:11 PM
Cloud cover
53%
2nd clearest
Wind
16 km/h
3rd windiest
Solar energy
2.1 kWh/m²
Travel score
1.3
out of 10

Yamoto is dissolved municipality in Monou district, Miyagi prefecture, Japan.

Founded
1889

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 10°C in the first days to 6°C by the end.

A typical December day in Yamoto reaches about 8°C in the afternoon and slips back to 3°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 4°C and 12°C. Set against its neighbours, December runs about 5°C cooler than November and about 3°C warmer than January.

-5°10°15°151015202531
Avg high (°C)Avg low (°C)
1105
2104
3104
4104
594
694
794
893
993
1083
1183
1283
1383
1483
1583
1682
1772
1872
1972
2072
2172
2272
2372
2472
2572
2672
2762
2861
2961
3061
3161

How December really feels in Yamoto

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.

Yamoto 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.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 527.63.89.60.1
Feb / 436.93.510.50.3
Mar / 8610.22.311.71.6
Apr13° / 9110.80.3133.6
May17° / 12°10010.2014.15.5
Jun21° / 16°11510.9014.66.0
Jul24° / 20°16214.7014.45.9
Aug26° / 22°13112.4013.56.1
Sep24° / 19°15112.6012.36.2
Oct19° / 13°1409.90116.0
Nov13° / 647.709.94.0
Dec / 568.82.59.41.3

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 37% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 22% of December, with mostly cloudy or overcast conditions the remaining 41%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15743
25743
35545
45545
55545
65545
75545
85545
95545
105644
115644
125644
135545
145644
155644
165743
175842
185842
196040
206040
216139
226238
236337
246337
256337
266436
276436
286436
296436
306436
316436

Chance of precipitation in December

Any precipitationSnow

Yamoto gets around 56 mm of rain and snow over 8.8 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 28% and peaks near 30% on the wettest days, and about 3 days bring snow.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
1283
2283
3284
4294
5295
6305
7306
8306
9307
10307
11307
12307
13298
14298
15298
16298
17288
18289
19289
20279
21279
22279
23269
24269
252610
262510
272510
282510
292410
302410
312411

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 16 km/h in December.

Across December, daily wind ranges from about 15 km/h on the calmest days to 17 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
1316light breeze
1416light breeze
1516light breeze
1616light breeze
1716light breeze
1816light breeze
1916light breeze
2016light breeze
2116light breeze
2216light breeze
2317light breeze
2417light breeze
2517light breeze
2617light breeze
2717light breeze
2817light breeze
2917light breeze
3017light breeze
3117light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 9 h 30 min at the start of December to 9 h 24 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 6:39 AM to 6:58 AM, and sunset from 4:10 PM to 4:19 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.56:394:10
29.56:404:10
39.56:414:10
49.56:424:10
59.46:434:10
69.46:444:10
79.46:454:10
89.46:454:10
99.46:464:10
109.46:474:10
119.46:484:10
129.46:494:10
139.46:494:11
149.36:504:11
159.36:514:11
169.36:514:11
179.36:524:12
189.36:524:12
199.36:534:12
209.36:544:13
219.36:544:13
229.36:554:14
239.36:554:14
249.36:554:15
259.36:564:15
269.36:564:16
279.36:574:16
289.36:574:17
299.36:574:18
309.36:574:18
319.46:584:19

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.1 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.1 kWh/m² to a high of 5.47 kWh/m² in May across the year — December's 2.1 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.1Moderate
22.1Moderate
32.1Moderate
42.1Moderate
52.1Moderate
62.1Moderate
72.1Moderate
82.1Moderate
92.1Moderate
102.1Moderate
112.1Moderate
122.1Moderate
132.1Moderate
142.1Moderate
152.1Moderate
162.1Moderate
172.1Moderate
182.1Moderate
192.1Moderate
202.1Moderate
212.1Moderate
222.2Moderate
232.2Moderate
242.2Moderate
252.2Moderate
262.2Moderate
272.2Moderate
282.3Moderate
292.3Moderate
302.3Moderate
312.3Moderate
Planning a trip in December

Hazard calendar for Yamoto

In seasonPeak

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

Yamoto 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 Yamoto?

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

1.3
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 Yamoto.

What to pack for Yamoto in December

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

In December, Yamoto sees daytime highs around 8°C and nights near 3°C. Pack a warm layer. Worth having: a heavy coat and rain gear. About 9 days see rain.

a warm layera heavy coatrain gear

Sea temperature near Yamoto in December

The nearest coast averages about 14°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 15 km away) is warmest in August at about 23°C and coldest in March near 8°C.

It's comfortable for a long swim from Jul 10 to Oct 8 — about 3 months when the water holds above 20°C.

5°10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan11Bracing
Feb9Bracing
Mar8Bracing
Apr10Bracing
May13Bracing
Jun17Cool
Jul21Refreshing
Aug23Refreshing
Sep22Refreshing
Oct19Cool
Nov16Cool
Dec14Bracing

UV index in Yamoto 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 Yamoto peaks around August 16 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateLowAug 16UV 9Jan 1UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr6High
May8Very high
Jun8Very high
Jul8Very high
Aug9Very high
Sep8Very high
Oct5Moderate
Nov3Moderate
Dec2Low

Air quality in Yamoto 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 Yamoto is worst in April — around 21 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (December, 9 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1621 µg/m³Dec 1710 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb14Moderate
Mar20Moderate
Apr21Moderate
May20Moderate
Jun14Moderate
Jul12Good
Aug10Good
Sep10Good
Oct11Good
Nov11Good
Dec9Good
Location & terrain

Where is Yamoto?

Yamoto sits at 38.4°N, 141.2°E, 2 m above sea level, in Japan. The nearest listed city is Higashimatsushima, 4.0 km away.

Topography around Yamoto

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

Within 3 km, the terrain around Yamoto has only modest variations in elevation — a maximum elevation change of 74 m around an average of 4 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 464 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,840 m.

The land around Yamoto is covered by cropland (43%) and artificial surfaces (32%) within 3 km, water (35%), trees (25%) and cropland (25%) within 16 km, and trees (49%) and water (36%) within 80 km.

3 km
74 m
16 km
464 m
80 km
1,840 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
December weather nearby: Higashimatsushima 4.0 km · Ishinomaki 8.0 km · Matsushima 15 km · Wakuya 15 km · Kogota-ekimae 17 km · Kogota 20 km · Shiogama 20 km · Shōbudahama 21 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 Yamoto (38.4274°, 141.2149°, elevation 2 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).