Mombetsu weather in December

In December, Mombetsu sees average daytime highs of -1°C and overnight lows near -7°C, with 72 mm of precipitation across 9.7 wet days and about 8.7 hours of daylight. It is the 10th-warmest and 8th-wettest month of the year here.

Highs ease over the month, from about 1°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 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 Mombetsu's 3rd-clearest and 1st-windiest month. For the whole year in context, see Mombetsu's year-round climate.

Daytime high
-1°
10th warmest
Overnight low
-7°
3rd coldest
Precipitation
72 mm
9.7 wet days
Daylight
8 h 42 min
7:02 AM – 3:43 PM
Cloud cover
64%
3rd clearest
Wind
14 km/h
1st windiest
Solar energy
1.58 kWh/m²
Travel score
0.0
out of 10

Mombetsu is city in Hokkaido, Japan.

Density
28/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 1°C in the first days to -2°C by the end.

A typical December day in Mombetsu reaches about -1°C in the afternoon and slips back to -7°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between -5°C and 3°C. Set against its neighbours, December runs about 7°C cooler than November and about 3°C warmer than January.

-15°-10°-5°10°151015202531
Avg high (°C)Avg low (°C)
12-4
22-4
31-5
41-5
51-5
61-5
70-6
80-6
90-6
100-6
110-6
120-7
13-1-7
14-1-7
15-1-7
16-1-7
17-1-7
18-1-8
19-1-8
20-2-8
21-2-8
22-2-8
23-2-8
24-2-8
25-2-8
26-2-9
27-2-9
28-2-9
29-2-9
30-2-9
31-3-9

How December really feels in Mombetsu

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
28 feel bitter (≤ -10°C)

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

Mombetsu weather by month

How December compares with the rest of the year at a glance. December is the 10th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-4° / -11°6410.312.290.0
Feb-3° / -11°499.211.710.20.0
Mar / -6°6111.611.611.60.0
Apr / -0°6711.56.313.21.7
May15° / 8111.61.314.64.2
Jun18° / 10°8011.4015.35.4
Jul22° / 15°11012.10156.0
Aug23° / 16°13313.4013.86.1
Sep20° / 12°12112.3012.35.8
Oct14° / 85110.410.84.0
Nov / -1°7211.25.79.40.7
Dec-1° / -7°729.710.58.70.0

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 23% of December, with mostly cloudy or overcast conditions the remaining 58%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14357
24357
34456
44456
54456
64654
74555
84555
94555
104555
114555
124555
134555
144555
154555
164555
174456
184357
194258
204258
214159
224159
234159
243961
253961
263862
273862
283862
293664
303664
313565

Chance of precipitation in December

Any precipitationSnow

Mombetsu gets around 72 mm of rain and snow over 9.7 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 34% on the wettest days, and about 11 days bring snow.

0%10%20%30%40%50%151015202531
Rain chance (%)Snow chance (%)
13328
23329
33329
43330
53230
63230
73231
83131
93132
103132
113133
123133
133033
143033
153033
163034
173034
183034
193035
203135
213136
223136
233237
243237
253237
263338
273338
283339
293439
303439
313440

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 14 km/h in December, the windiest month of the year.

Across December, daily wind ranges from about 14 km/h on the calmest days to 15 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
1314light breeze
1414light breeze
1514light breeze
1614light breeze
1714light breeze
1814light breeze
1914light breeze
2014light breeze
2114light breeze
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3014light breeze
3114light breeze

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 6:49 AM to 7:09 AM, and sunset from 3:44 PM to 3:51 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
18.96:493:44
28.96:503:43
38.96:513:43
48.86:523:43
58.86:533:43
68.86:543:42
78.86:553:42
88.86:563:42
98.86:573:42
108.76:583:42
118.76:593:42
128.76:593:42
138.77:003:42
148.77:013:43
158.77:023:43
168.77:023:43
178.77:033:43
188.77:043:44
198.77:043:44
208.77:053:44
218.77:053:45
228.77:063:45
238.77:063:46
248.77:073:46
258.77:073:47
268.77:073:47
278.77:083:48
288.77:083:49
298.77:083:49
308.77:083:50
318.77:093:51

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 1.58 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 1.58 kWh/m² to a high of 5.48 kWh/m² in May across the year — December's 1.58 kWh/m² sits near the bottom.

00.511.522.5151015202531
Solar energy (kWh/m²)Level
11.6Dim
21.6Dim
31.6Dim
41.6Dim
51.6Dim
61.6Dim
71.6Dim
81.6Dim
91.6Dim
101.6Dim
111.6Dim
121.6Dim
131.6Dim
141.6Dim
151.6Dim
161.6Dim
171.6Dim
181.6Dim
191.6Dim
201.6Dim
211.6Dim
221.6Dim
231.6Dim
241.6Dim
251.6Dim
261.6Dim
271.6Dim
281.7Dim
291.7Dim
301.7Dim
311.7Dim
Planning a trip in December

Hazard calendar for Mombetsu

In seasonPeak

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

Mombetsu 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 Mombetsu?

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 Mombetsu.

What to pack for Mombetsu in December

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

In December, Mombetsu sees daytime highs around -1°C and nights near -7°C. Pack a warm layer and a heavy coat. Worth having: rain gear. About 10 days see rain.

a warm layera heavy coatrain gear

Sea temperature near Mombetsu 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 offshore is warmest in August at about 17°C and coldest in February near -1°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
Feb-1Bracing
Mar0Bracing
Apr2Bracing
May5Bracing
Jun10Bracing
Jul14Bracing
Aug17Cool
Sep17Cool
Oct13Bracing
Nov7Bracing
Dec3Bracing

UV index in Mombetsu 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 Mombetsu 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 7 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowAug 14UV 8Dec 20UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar3Moderate
Apr5High
May7High
Jun7High
Jul7High
Aug8Very high
Sep6High
Oct4Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Mombetsu?

Mombetsu sits at 44.4°N, 143.4°E, 16 m above sea level, in Japan. The nearest listed city is Engaru, 37 km away.

Fukagawa

Topography around Mombetsu

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

Within 3 km, the terrain around Mombetsu has significant variations in elevation — a maximum elevation change of 340 m around an average of 40 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 420 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,956 m.

The land around Mombetsu is covered by water (41%), trees (28%) and artificial surfaces (22%) within 3 km, water (50%) and trees (37%) within 16 km, and trees (58%) and water (32%) within 80 km.

3 km
340 m
16 km
420 m
80 km
1,956 m
treesgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Engaru 37 km · Nayoro 71 km · Kitami 75 km · Minamishibetsuchō 81 km · Abashiri 82 km · Motomachi 83 km · Asahikawa 102 km · Fukagawa 127 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 Mombetsu (44.3525°, 143.3525°, elevation 16 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).