Nanaku weather in December

In December, Nanaku sees average daytime highs of 3°C and overnight lows near -3°C, with 60 mm of precipitation across 10 wet days and about 9.2 hours of daylight. It is the 10th-warmest and 10th-wettest month of the year here.

Highs ease over the month, from about 6°C in the first days to 2°C by the end. The sky is clear or mostly clear about 19% of the time in December, and the air most often feels dry.

Daylight stretches from about 9 h 18 min at the start of December to 9 h 12 min by month's end. Set against the rest of the year, December is Nanaku's 4th-clearest and 3rd-windiest month. For the whole year in context, see Nanaku's year-round climate.

Daytime high
10th warmest
Overnight low
-3°
3rd coldest
Precipitation
60 mm
10 wet days
Daylight
9 h 06 min
6:57 AM – 4:05 PM
Cloud cover
63%
4th clearest
Wind
12 km/h
3rd windiest
Solar energy
1.85 kWh/m²
Travel score
0.0
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 6°C in the first days to 2°C by the end.

A typical December day in Nanaku reaches about 3°C in the afternoon and slips back to -3°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between -1°C and 8°C. Set against its neighbours, December runs about 7°C cooler than November and about 3°C warmer than January.

-10°-5°10°15°151015202531
Avg high (°C)Avg low (°C)
16-1
26-1
36-1
45-2
55-2
65-2
75-2
85-2
94-2
104-3
114-3
124-3
134-3
143-3
153-3
163-4
173-4
183-4
193-4
203-4
213-4
223-4
232-4
242-4
252-4
262-4
272-5
282-5
292-5
302-5
312-5

How December really feels in Nanaku

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
0
heat index over the day's high
Days feeling ≤ C
31
1 feel bitter (≤ -10°C)

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

Nanaku 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 / -7°518.699.40.0
Feb / -6°548.89.110.40.0
Mar / -3°8212.58.411.70.7
Apr13° / 8613.32.4133.6
May19° / 10°9712.50.114.25.6
Jun22° / 14°11212.4014.85.9
Jul25° / 18°15515.2014.65.8
Aug27° / 19°15915.1013.65.6
Sep23° / 15°14413.3012.36.0
Oct17° / 11110.6010.95.3
Nov10° / 6511.22.29.82.3
Dec / -3°60107.39.20.0

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 19% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 27% of December, with mostly cloudy or overcast conditions the remaining 54%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14555
24456
34456
44456
54555
64555
74654
84654
94753
104753
114753
124753
134852
144852
154852
164852
174852
184852
194753
204753
214753
224753
234555
244555
254456
264555
274555
284456
294456
304456
314456

Chance of precipitation in December

Any precipitationSnow

Nanaku gets around 60 mm of rain and snow over 10 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 32% and peaks near 38% on the wettest days, and about 7 days bring snow. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)Snow chance (%)
13819
23819
33820
43820
53721
63721
73722
83622
93623
103523
113523
123423
133423
143323
153223
163223
173123
183124
193024
203024
212924
222924
232924
242825
252825
262825
272825
282826
292726
302726
312727

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 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
412light breeze
512light breeze
612light breeze
712light breeze
812light breeze
912light breeze
1012light breeze
1112light breeze
1212light breeze
1312light breeze
1412light breeze
1512light breeze
1612light breeze
1712light breeze
1812light breeze
1912light breeze
2012light breeze
2112light breeze
2212light breeze
2313light breeze
2413light 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 18 min at the start of December to 9 h 12 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 6:45 AM to 7:03 AM, and sunset from 4:05 PM to 4:13 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.36:454:05
29.36:464:04
39.36:474:04
49.36:484:04
59.36:494:04
69.26:494:04
79.26:504:04
89.26:514:04
99.26:524:04
109.26:534:04
119.26:544:04
129.26:544:04
139.26:554:04
149.16:564:04
159.16:564:05
169.16:574:05
179.16:584:05
189.16:584:06
199.16:594:06
209.16:594:06
219.17:004:07
229.17:004:07
239.17:014:08
249.17:014:08
259.17:024:09
269.17:024:09
279.17:024:10
289.17:034:11
299.17:034:11
309.17:034:12
319.27:034:13

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 1.85 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 1.85 kWh/m² to a high of 5.51 kWh/m² in May across the year — December's 1.85 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
11.9Dim
21.9Dim
31.9Dim
41.9Dim
51.8Dim
61.8Dim
71.8Dim
81.8Dim
91.8Dim
101.8Dim
111.8Dim
121.8Dim
131.8Dim
141.8Dim
151.9Dim
161.9Dim
171.9Dim
181.9Dim
191.9Dim
201.9Dim
211.9Dim
221.9Dim
231.9Dim
241.9Dim
251.9Dim
262.0Dim
272.0Dim
282.0Dim
292.0Moderate
302.0Moderate
312.0Moderate
Planning a trip in December

Hazard calendar for Nanaku

In seasonPeak

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

Nanaku 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 Nanaku?

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

0.0
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 Nanaku.

What to pack for Nanaku in December

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

In December, Nanaku sees daytime highs around 3°C and nights near -3°C. Pack a warm layer. Worth having: a heavy coat and rain gear. About 10 days see rain.

a warm layera heavy coatrain gear

Sea temperature near Nanaku in December

The nearest coast averages about 12°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 39 km away) is warmest in August at about 21°C and coldest in March near 7°C.

It's comfortable for a long swim from Aug 8 to Sep 26 — about 1.6 months when the water holds above 20°C.

5°10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarm
Sea temperature (°C)Comfort
Jan10Bracing
Feb8Bracing
Mar7Bracing
Apr8Bracing
May10Bracing
Jun14Bracing
Jul18Cool
Aug21Refreshing
Sep21Refreshing
Oct18Cool
Nov15Cool
Dec12Bracing

UV index in Nanaku in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 1. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Nanaku peaks around August 19 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 1 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighVery highHighModerateLowAug 19UV 8Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb3Moderate
Mar3Moderate
Apr6High
May8Very high
Jun7Very high
Jul5Moderate
Aug9Very high
Sep7High
Oct5Moderate
Nov2Moderate
Dec1Low

Air quality in Nanaku 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 Nanaku 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 1421 µg/m³Dec 1510 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb14Moderate
Mar20Moderate
Apr21Moderate
May19Moderate
Jun14Moderate
Jul12Moderate
Aug12Good
Sep12Good
Oct12Good
Nov10Good
Dec10Good
Location & terrain

Where is Nanaku?

Nanaku sits at 40.4°N, 141.3°E, 36 m above sea level, in Japan. The nearest listed city is Ninohe, 13 km away.

Topography around Nanaku

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

Within 3 km, the terrain around Nanaku has significant variations in elevation — a maximum elevation change of 528 m around an average of 123 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 770 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,118 m.

The land around Nanaku is covered by trees (83%) within 3 km, trees (87%) within 16 km, and trees (65%) and water (25%) within 80 km.

3 km
528 m
16 km
770 m
80 km
2,118 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Ninohe 13 km · Hakurōmachi 14 km · Hachinohe 22 km · Towada 25 km · Hitokawame 30 km · Ōno 33 km · Misawa 33 km · Toyota 39 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 Nanaku (40.4009°, 141.2727°, elevation 36 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).