Nanao weather in December

In December, Nanao sees average daytime highs of 10°C and overnight lows near 5°C, with 138 mm of precipitation across 20.5 wet days and about 9.5 hours of daylight. It is the 10th-warmest and 6th-wettest month of the year here.

Highs ease over the month, from about 12°C in the first days to 8°C by the end. The sky is clear or mostly clear about 11% of the time in December, and the air most often feels dry.

Daylight stretches from about 9 h 36 min at the start of December to 9 h 30 min by month's end. Set against the rest of the year, December is Nanao's 8th-clearest and 1st-windiest month. For the whole year in context, see Nanao's year-round climate.

Daytime high
10°
10th warmest
Overnight low
4th coldest
Precipitation
138 mm
20.5 wet days
Daylight
9 h 30 min
7:04 AM – 4:32 PM
Cloud cover
68%
8th clearest
Wind
14 km/h
1st windiest
Solar energy
1.85 kWh/m²
Travel score
1.6
out of 10

Nanao is city in Ishikawa Prefecture, Japan.

Density
158/km²
people per km²
Founded
2004

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 12°C in the first days to 8°C by the end.

A typical December day in Nanao reaches about 10°C in the afternoon and slips back to 5°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 5°C and 14°C. Set against its neighbours, December runs about 5°C cooler than November and about 3°C warmer than January.

10°15°20°151015202531
Avg high (°C)Avg low (°C)
1127
2127
3127
4127
5116
6116
7116
8116
9116
10106
11105
12105
13105
14105
15105
1695
1795
1895
1994
2094
2194
2294
2394
2484
2584
2684
2784
2884
2984
3083
3183

How December really feels in Nanao

Once humidity and wind are folded in, December averages 0 days that feel above 32°C and 2 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
2
wind chill below the day's low

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

Nanao weather by month

How December compares with the rest of the year at a glance. December is the 10th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 122208.79.70.6
Feb / 9516.1710.60.9
Mar11° / 126162.611.72.3
Apr16° / 11612.40.212.94.8
May21° / 14°12011.90146.3
Jun25° / 19°15711.5014.56.3
Jul29° / 23°24615.7014.34.6
Aug31° / 25°16612.3013.44.3
Sep27° / 21°20213.6012.35.7
Oct21° / 15°14913.20116.0
Nov15° / 10°13415.60.1104.0
Dec10° / 13820.54.49.51.6

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 11% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 25% of December, with mostly cloudy or overcast conditions the remaining 63%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13862
23961
33862
43862
53763
63763
73763
83664
93664
103565
113565
123466
133466
143466
153565
163565
173565
183664
193664
203664
213763
223763
233862
243862
253862
263961
273961
283862
293862
303862
313763

Chance of precipitation in December

Any precipitationSnow

Nanao gets around 138 mm of rain and snow over 20.5 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 66% and peaks near 68% on the wettest days, and about 4 days bring snow.

0%20%40%60%80%151015202531
Rain chance (%)Snow chance (%)
1624
2624
3635
4645
5656
6657
7668
8669
96710
106710
116811
126812
136813
146813
156814
166815
176715
186716
196717
206717
216718
226718
236619
246619
256620
266620
276621
286621
296621
306622
316622

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 (%)Comfortable (%)
1991
2991
3991
4991
5991
6991
71000
81000
91000
101000
111000
121000
131000
141000
151000
161000
171000
181000
191000
201000
211000
221000
231000
241000
251000
261000
271000
281000
291000
301000
311000

Wind in December

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

Across December, daily wind ranges from about 13 km/h on the calmest days to 14 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light 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 9 h 36 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 6 minutes over December. Sunrise moves from 6:53 AM to 7:11 AM, and sunset from 4:31 PM to 4:40 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.66:534:31
29.66:544:31
39.66:544:31
49.66:554:31
59.66:564:31
69.66:574:31
79.66:584:31
89.56:594:31
99.56:594:31
109.57:004:31
119.57:014:31
129.57:024:31
139.57:024:32
149.57:034:32
159.57:044:32
169.57:044:32
179.57:054:33
189.57:054:33
199.57:064:33
209.57:074:34
219.57:074:34
229.57:084:35
239.57:084:35
249.57:084:36
259.57:094:36
269.57:094:37
279.57:104:37
289.57:104:38
299.57:104:39
309.57:104:39
319.57:114:40

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 5.81 kWh/m² in May across the year — December's 1.85 kWh/m² sits near the bottom.

00.511.522.5151015202531
Solar energy (kWh/m²)Level
12.0Dim
21.9Dim
31.9Dim
41.9Dim
51.9Dim
61.9Dim
71.9Dim
81.9Dim
91.9Dim
101.9Dim
111.9Dim
121.9Dim
131.9Dim
141.9Dim
151.9Dim
161.9Dim
171.9Dim
181.9Dim
191.9Dim
201.9Dim
211.9Dim
221.9Dim
231.9Dim
241.9Dim
251.9Dim
261.9Dim
271.9Dim
281.9Dim
291.9Dim
301.9Dim
311.9Dim
Planning a trip in December

Hazard calendar for Nanao

In seasonPeak

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

Nanao 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 Nanao?

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

1.6
Sightseeing
10th-best month of the year
0.0
Beach & pool
10th-best month of the year

December is a weaker month for outdoor sightseeing in Nanao.

What to pack for Nanao in December

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

In December, Nanao sees daytime highs around 10°C and nights near 5°C. Pack a warm layer and rain gear. About 21 days see rain.

a warm layerrain gear

Sea temperature near Nanao in December

The nearest coast averages about 16°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 16 km away) is warmest in August at about 27°C and coldest in March near 10°C.

It's comfortable for a long swim from Jun 18 to Nov 3 — about 4.6 months when the water holds above 20°C.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan13Bracing
Feb11Bracing
Mar10Bracing
Apr11Bracing
May15Cool
Jun20Cool
Jul24Refreshing
Aug27Warm
Sep25Warm
Oct22Refreshing
Nov19Cool
Dec16Cool

UV index in Nanao 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 Nanao peaks around August 15 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateAug 15UV 10Dec 23UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr6High
May8Very high
Jun9Very high
Jul9Very high
Aug10Very high
Sep8Very high
Oct5High
Nov3Moderate
Dec2Low

Air quality in Nanao 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 Nanao is worst in April — around 21 µg/m³ PM2.5 (moderate), about 2.4× the cleanest month (December, 9 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1621 µg/m³Dec 139 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb13Moderate
Mar20Moderate
Apr21Moderate
May20Moderate
Jun18Moderate
Jul14Moderate
Aug12Good
Sep10Good
Oct10Good
Nov10Good
Dec9Good
Location & terrain

Where is Nanao?

Nanao sits at 37.0°N, 137.0°E, 2 m above sea level, in Japan. The nearest listed city is Hitoto, 9.0 km away.

Topography around Nanao

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

Within 3 km, the terrain around Nanao has only modest variations in elevation — a maximum elevation change of 108 m around an average of 16 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 551 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,981 m.

The land around Nanao is covered by water (31%), trees (27%) and artificial surfaces (24%) within 3 km, trees (48%) and water (41%) within 16 km, and water (58%) and trees (32%) within 80 km.

3 km
108 m
16 km
551 m
80 km
2,981 m
treesgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Hitoto 9.0 km · Oshima 19 km · Himimachi 21 km · Anamizu 21 km · Himi 22 km · Hakui 25 km · Nishishinminato 31 km · Ushitsu 33 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 Nanao (37.0482°, 136.968°, 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).