Nayoro weather in December

In December, Nayoro sees average daytime highs of -3°C and overnight lows near -9°C, with 90 mm of precipitation across 18 wet days and about 8.7 hours of daylight. It is the 10th-warmest and 7th-wettest month of the year here.

Highs ease over the month, from about -0°C in the first days to -4°C by the end. The sky is clear or mostly clear about 4% of the time in December, and the air most often feels dry.

Daylight stretches from about 8 h 54 min at the start of December to 8 h 42 min by month's end. Set against the rest of the year, December is Nayoro's 10th-clearest and 3rd-windiest month. For the whole year in context, see Nayoro's year-round climate.

Daytime high
-3°
10th warmest
Overnight low
-9°
3rd coldest
Precipitation
90 mm
18 wet days
Daylight
8 h 42 min
7:06 AM – 3:47 PM
Cloud cover
76%
10th clearest
Wind
12 km/h
3rd windiest
Solar energy
1.48 kWh/m²
Travel score
0.0
out of 10

Nayoro is city in Hokkaido, Japan.

Density
51/km²
people per km²
Founded
2006

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 -0°C in the first days to -4°C by the end.

A typical December day in Nayoro reaches about -3°C in the afternoon and slips back to -9°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between -7°C and 2°C. Set against its neighbours, December runs about 7°C cooler than November and about 2°C warmer than January.

-20°-10°10°151015202531
Avg high (°C)Avg low (°C)
10-7
20-7
30-7
4-1-7
5-1-8
6-1-8
7-1-8
8-1-8
9-2-8
10-2-9
11-2-9
12-2-9
13-2-9
14-2-9
15-3-10
16-3-10
17-3-10
18-3-10
19-3-10
20-3-10
21-3-10
22-3-10
23-3-10
24-3-11
25-4-11
26-4-11
27-4-11
28-4-11
29-4-11
30-4-11
31-4-11

How December really feels in Nayoro

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
31 feel bitter (≤ -10°C)

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

Nayoro weather by month

How December compares with the rest of the year at a glance. December is the 10th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-5° / -12°6114.719.190.0
Feb-4° / -12°5212.516.310.20.0
Mar / -7°6914.215.611.60.0
Apr / -1°7413.57.813.21.3
May15° / 8912.90.914.64.1
Jun19° / 10°9112.8015.35.4
Jul22° / 14°13614.60155.8
Aug23° / 15°14914.5013.85.8
Sep19° / 10°13914.9012.35.2
Oct13° / 11615.61.410.83.0
Nov / -3°11418.214.19.40.3
Dec-3° / -9°901821.88.70.0

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 4% 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 82%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
11882
21981
31882
41882
51882
61882
71981
81981
91981
101882
111882
121981
131981
141981
151981
161981
171981
181981
191981
201981
211981
221981
231981
241882
251783
261783
271783
281783
291783
301783
311684

Chance of precipitation in December

Any precipitationSnow

Nayoro gets around 90 mm of rain and snow over 18 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 57% and peaks near 63% on the wettest days, and about 22 days bring snow. The odds ease toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)Snow chance (%)
16368
26269
36269
46270
56270
66270
76171
86171
96171
106071
116071
125971
135971
145871
155871
165770
175770
185670
195670
205670
215670
225570
235570
245569
255469
265369
275368
285368
295268
305268
315268

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 11 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
112light breeze
212light breeze
312light breeze
412light breeze
512light breeze
612light breeze
712light breeze
812light breeze
912light breeze
1012light breeze
1112calm
1212calm
1312calm
1412calm
1512calm
1612calm
1712calm
1812calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm
3111calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 8 h 54 min at the start of December to 8 h 42 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 6:53 AM to 7:12 AM, and sunset from 3:47 PM to 3:54 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
18.96:533:47
28.96:543:47
38.96:553:47
48.86:563:46
58.86:573:46
68.86:583:46
78.86:593:46
88.87:003:46
98.87:013:46
108.77:013:46
118.77:023:46
128.77:033:46
138.77:043:46
148.77:053:46
158.77:053:46
168.77:063:47
178.77:073:47
188.77:073:47
198.77:083:48
208.77:083:48
218.77:093:48
228.77:093:49
238.77:103:49
248.77:103:50
258.77:113:50
268.77:113:51
278.77:113:52
288.77:123:52
298.77:123:53
308.77:123:54
318.77:123:54

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 1.48 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 1.48 kWh/m² to a high of 5.29 kWh/m² in May across the year — December's 1.48 kWh/m² sits near the bottom.

00.511.522.5151015202531
Solar energy (kWh/m²)Level
11.5Dim
21.5Dim
31.5Dim
41.5Dim
51.5Dim
61.5Dim
71.5Dim
81.5Dim
91.5Dim
101.5Dim
111.5Dim
121.5Dim
131.5Dim
141.5Dim
151.5Dim
161.5Dim
171.5Dim
181.5Dim
191.5Dim
201.5Dim
211.5Dim
221.5Dim
231.5Dim
241.5Dim
251.5Dim
261.5Dim
271.5Dim
281.6Dim
291.6Dim
301.6Dim
311.6Dim
Planning a trip in December

Hazard calendar for Nayoro

In seasonPeak

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

Nayoro 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 Nayoro?

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

0.0
Sightseeing
9th-best month of the year
0.0
Beach & pool
7th-best month of the year

December is a weaker month for outdoor sightseeing in Nayoro.

What to pack for Nayoro in December

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

In December, Nayoro sees daytime highs around -3°C and nights near -9°C. Pack a warm layer, a heavy coat and rain gear. About 18 days see rain.

a warm layera heavy coatrain gear

Sea temperature near Nayoro in December

The nearest coast averages about 3°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 45 km away) is warmest in August at about 18°C and coldest in February near -0°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

0°10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan0Bracing
Feb0Bracing
Mar0Bracing
Apr2Bracing
May5Bracing
Jun10Bracing
Jul14Bracing
Aug18Cool
Sep17Cool
Oct13Bracing
Nov7Bracing
Dec3Bracing

UV index in Nayoro 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 Nayoro peaks around August 14 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 1 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighHighVery highHighModerateLowAug 14UV 8Dec 20UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar3Moderate
Apr6High
May7Very high
Jun7High
Jul7Very high
Aug8Very high
Sep6High
Oct4Moderate
Nov2Low
Dec1Low

Air quality in Nayoro 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 Nayoro is worst in April — around 17 µg/m³ PM2.5 (moderate), about 2.5× the cleanest month (December, 7 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1516 µg/m³Dec 197 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb10Good
Mar15Moderate
Apr17Moderate
May15Moderate
Jun10Good
Jul10Good
Aug8Good
Sep7Good
Oct9Good
Nov8Good
Dec7Good
Location & terrain

Where is Nayoro?

Nayoro sits at 44.4°N, 142.5°E, 97 m above sea level, in Japan. The nearest listed city is Minamishibetsuchō, 23 km away.

Topography around Nayoro

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

Within 3 km, the terrain around Nayoro has only modest variations in elevation — a maximum elevation change of 173 m around an average of 109 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 916 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,225 m.

The land around Nayoro is covered by cropland (39%), artificial surfaces (26%) and trees (25%) within 3 km, trees (71%) and cropland (23%) within 16 km, and trees (68%) and water (21%) within 80 km.

3 km
173 m
16 km
916 m
80 km
2,225 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Minamishibetsuchō 23 km · Asahikawa 65 km · Mombetsu 71 km · Fukagawa 79 km · Rumoi 80 km · Engaru 93 km · Ashibetsu 96 km · Takikawa 99 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 Nayoro (44.3506°, 142.4578°, elevation 97 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).