Ono weather in December

In December, Ono sees average daytime highs of 12°C and overnight lows near 6°C, with 61 mm of rain across 6.7 wet days and about 9.7 hours of daylight. It is the 10th-warmest and 10th-wettest month of the year here.

Highs ease over the month, from about 14°C in the first days to 10°C by the end. The sky is clear or mostly clear about 40% of the time in December, and the air most often feels dry.

Daylight stretches from about 9 h 48 min at the start of December to 9 h 42 min by month's end. Set against the rest of the year, December is Ono's 1st-clearest and 5th-windiest month. For the whole year in context, see Ono's year-round climate.

Daytime high
12°
10th warmest
Overnight low
4th coldest
Rainfall
61 mm
6.7 wet days
Daylight
9 h 42 min
7:06 AM – 4:47 PM
Cloud cover
50%
1st clearest
Wind
12 km/h
5th windiest
Solar energy
2.42 kWh/m²
Travel score
3.3
out of 10

Ono is city in Hyōgo Prefecture, Japan.

Density
512/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 14°C in the first days to 10°C by the end.

A typical December day in Ono reaches about 12°C in the afternoon and slips back to 6°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 8°C and 15°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)
1149
2148
3148
4138
5138
6138
7138
8137
9127
10127
11127
12127
13127
14127
15126
16116
17116
18116
19116
20116
21116
22116
23116
24115
25105
26105
27105
28105
29105
30105
31105

How December really feels in Ono

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

December sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Ono 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 / 4960.39.91.9
Feb / 596.90.710.72.1
Mar13° / 1009.80.111.73.4
Apr17° / 11°1169.8012.95.6
May22° / 16°1399.9013.86.6
Jun25° / 21°17612.6014.36.0
Jul29° / 25°18713.6014.15.0
Aug30° / 26°11711.7013.34.6
Sep27° / 22°19412.7012.25.8
Oct22° / 17°1519.1011.17.0
Nov17° / 11°767.2010.25.8
Dec12° / 616.709.73.3

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 40% of the time in December, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 24% of December, with mostly cloudy or overcast conditions the remaining 36%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16238
26238
36337
46337
56337
66337
76337
86337
96337
106436
116436
126436
136436
146337
156337
166436
176436
186436
196436
206436
216436
226436
236535
246535
256535
266634
276634
286634
296634
306634
316634

Chance of precipitation in December

Any precipitation

Ono gets around 61 mm of rain over 6.7 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 21% and peaks near 23% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
123
223
323
423
523
623
723
823
922
1022
1122
1222
1322
1422
1521
1621
1721
1821
1920
2020
2120
2220
2320
2420
2520
2619
2719
2819
2918
3018
3118

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 (%)
1982
2991
3991
4991
5991
6991
7991
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 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
111calm
211calm
311calm
412calm
512calm
612calm
712calm
812calm
912calm
1012calm
1112calm
1212calm
1312calm
1412calm
1512calm
1612calm
1712calm
1812light breeze
1912light breeze
2012light breeze
2112light breeze
2212light breeze
2312light breeze
2412light breeze
2512light breeze
2612light breeze
2712light breeze
2812light breeze
2912light breeze
3012light breeze
3112light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 9 h 48 min at the start of December to 9 h 42 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 6:55 AM to 7:13 AM, and sunset from 4:45 PM to 4:54 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.86:554:45
29.86:564:45
39.86:574:45
49.86:584:45
59.86:584:45
69.86:594:45
79.77:004:45
89.77:014:45
99.77:024:45
109.77:024:45
119.77:034:45
129.77:044:46
139.77:044:46
149.77:054:46
159.77:064:46
169.77:064:47
179.77:074:47
189.77:074:47
199.77:084:48
209.77:094:48
219.77:094:48
229.77:104:49
239.77:104:49
249.77:104:50
259.77:114:50
269.77:114:51
279.77:124:52
289.77:124:52
299.77:124:53
309.77:124:53
319.77:134:54

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.42 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.42 kWh/m² to a high of 5.62 kWh/m² in May across the year — December's 2.42 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.5Moderate
22.5Moderate
32.5Moderate
42.5Moderate
52.4Moderate
62.4Moderate
72.4Moderate
82.4Moderate
92.4Moderate
102.4Moderate
112.4Moderate
122.4Moderate
132.4Moderate
142.4Moderate
152.4Moderate
162.4Moderate
172.4Moderate
182.4Moderate
192.4Moderate
202.4Moderate
212.5Moderate
222.5Moderate
232.5Moderate
242.5Moderate
252.5Moderate
262.5Moderate
272.5Moderate
282.5Moderate
292.5Moderate
302.5Moderate
312.6Moderate
Planning a trip in December

Hazard calendar for Ono

In seasonPeak

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

Ono 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 Ono?

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

3.3
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 Ono.

What to pack for Ono in December

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

In December, Ono sees daytime highs around 12°C and nights near 6°C. Pack a warm layer. About 7 days see rain.

a warm layer

Sea temperature near Ono in December

The nearest coast averages about 17°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 26 km away) is warmest in August at about 27°C and coldest in February near 13°C.

It's comfortable for a long swim from Jun 6 to Nov 13 — about 5.3 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb13Bracing
Mar14Bracing
Apr15Cool
May18Cool
Jun21Refreshing
Jul25Warm
Aug27Warm
Sep26Warm
Oct23Refreshing
Nov20Cool
Dec17Cool

UV index in Ono 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 Ono peaks around July 12 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateJul 12UV 10Dec 22UV 2
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5High
Apr7High
May8Very high
Jun10Very high
Jul10Very high
Aug9Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec2Moderate

Air quality in Ono 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 Ono is worst in April — around 26 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (October, 14 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1625 µg/m³Oct 1914 µg/m³
PM2.5 (µg/m³)Level
Jan16Moderate
Feb19Moderate
Mar24Moderate
Apr26Moderate
May24Moderate
Jun21Moderate
Jul22Moderate
Aug24Moderate
Sep17Moderate
Oct14Moderate
Nov16Moderate
Dec15Moderate
Location & terrain

Where is Ono?

Ono sits at 34.9°N, 134.9°E, 53 m above sea level, in Japan. The nearest listed city is Miki, 7.0 km away.

Topography around Ono

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

Within 3 km, the terrain around Ono has only modest variations in elevation — a maximum elevation change of 146 m around an average of 49 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 491 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,489 m.

The land around Ono is covered by cropland (33%), artificial surfaces (30%) and trees (25%) within 3 km, trees (46%), artificial surfaces (23%) and cropland (21%) within 16 km, and trees (57%) and water (25%) within 80 km.

3 km
146 m
16 km
491 m
80 km
1,489 m
treesgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Miki 7.0 km · Yashiro 8.0 km · Inami 11 km · Kasai 12 km · Katō 12 km · Kakogawachō-honmachi 13 km · Nishiwaki 15 km · Higashinozoe 15 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 Ono (34.85°, 134.9333°, elevation 53 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).