Ōnojō weather in December

In December, Ōnojō sees average daytime highs of 12°C and overnight lows near 4°C, with 69 mm of precipitation across 9.3 wet days and about 9.8 hours of daylight. It is the 10th-warmest and 11th-wettest month of the year here.

Highs ease over the month, from about 14°C in the first days to 11°C by the end. The sky is clear or mostly clear about 23% of the time in December, and the air most often feels dry.

Daylight stretches from about 9 h 54 min at the start of December to 9 h 48 min by month's end. Set against the rest of the year, December is Ōnojō's 5th-clearest and 4th-windiest month. For the whole year in context, see Ōnojō's year-round climate.

Daytime high
12°
10th warmest
Overnight low
3rd coldest
Precipitation
69 mm
9.3 wet days
Daylight
9 h 48 min
7:21 AM – 5:08 PM
Cloud cover
62%
5th clearest
Wind
9 km/h
4th windiest
Solar energy
2.18 kWh/m²
Travel score
3.3
out of 10

Ōnojō is city in Fukuoka Prefecture, Japan.

Density
3,796/km²
people per km²
Founded
1972

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 11°C by the end.

A typical December day in Ōnojō reaches about 12°C in the afternoon and slips back to 4°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 7°C and 16°C. Set against its neighbours, December runs about 6°C cooler than November and about 2°C warmer than January.

10°15°20°151015202531
Avg high (°C)Avg low (°C)
1146
2146
3146
4146
5146
6135
7135
8135
9135
10135
11125
12125
13124
14124
15124
16124
17124
18124
19124
20114
21114
22114
23114
24114
25113
26113
27113
28113
29113
30113
31113

How December really feels in Ōnojō

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.

Ōnojō weather by month

How December compares with the rest of the year at a glance. December is the 10th-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan10° / 639.61.5102.1
Feb11° / 719.11.210.82.6
Mar14° / 11511.60.211.74.1
Apr19° / 10°13011.1012.85.9
May24° / 15°14710.6013.76.6
Jun27° / 20°30515.8014.25.3
Jul30° / 24°28717.50143.9
Aug32° / 24°17115.1013.23.7
Sep28° / 21°17912.8012.25.5
Oct23° / 15°1018011.27.2
Nov18° / 868.6010.35.8
Dec12° / 699.30.69.83.3

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 23% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 19% of December, with mostly cloudy or overcast conditions the remaining 58%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14852
24852
34852
44654
54654
64555
74555
84456
94456
104357
114258
124258
134159
144258
154060
164060
174060
184060
194060
203961
213961
224060
234060
244060
254060
264060
274060
284060
294060
304060
314060

Chance of precipitation in December

Any precipitationSnow

Ōnojō gets around 69 mm of rain and snow over 9.3 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 30% and peaks near 32% on the wettest days, and about 1 day brings snow.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
1311
2311
3311
4321
5321
6311
7311
8311
9311
10311
11311
12311
13312
14302
15302
16302
17302
18302
19302
20292
21292
22293
23293
24283
25283
26283
27274
28274
29264
30264
31264

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 99% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)
1964
2973
3973
4973
5982
6982
7982
8982
9991
10991
11991
12991
13991
14991
151000
161000
171000
181000
191000
201000
211000
221000
231000
241000
251000
261000
271000
281000
291000
301000
311000

Wind in December

Winds average 9 km/h in December.

Across December, daily wind ranges from about 8 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm
319calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 9 h 54 min at the start of December to 9 h 48 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 7:10 AM to 7:27 AM, and sunset from 5:06 PM to 5:15 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.97:105:06
29.97:115:06
39.97:115:06
49.97:125:06
59.97:135:06
69.97:145:06
79.97:155:06
89.87:155:06
99.87:165:06
109.87:175:06
119.87:175:07
129.87:185:07
139.87:195:07
149.87:195:07
159.87:205:08
169.87:215:08
179.87:215:08
189.87:225:09
199.87:225:09
209.87:235:09
219.87:235:10
229.87:245:10
239.87:245:11
249.87:255:11
259.87:255:12
269.87:265:12
279.87:265:13
289.87:265:13
299.87:275:14
309.87:275:15
319.87:275:15

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.18 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.18 kWh/m² to a high of 5.36 kWh/m² in May across the year — December's 2.18 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.3Moderate
22.3Moderate
32.3Moderate
42.3Moderate
52.3Moderate
62.2Moderate
72.2Moderate
82.2Moderate
92.2Moderate
102.2Moderate
112.2Moderate
122.2Moderate
132.2Moderate
142.1Moderate
152.1Moderate
162.1Moderate
172.1Moderate
182.1Moderate
192.1Moderate
202.1Moderate
212.2Moderate
222.2Moderate
232.2Moderate
242.2Moderate
252.2Moderate
262.2Moderate
272.2Moderate
282.2Moderate
292.2Moderate
302.3Moderate
312.3Moderate
Planning a trip in December

Hazard calendar for Ōnojō

In seasonPeak

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

Ōnojō sits in the Pacific typhoon belt; the season peaks July–October.

Ōnojō's rainy season runs May–September, when most of the year's rain falls.

Pacific typhoon
Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is December a good time to visit Ōnojō?

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 Ōnojō.

What to pack for Ōnojō in December

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

In December, Ōnojō sees daytime highs around 12°C and nights near 4°C. Worth packing: a warm layer and rain gear. About 9 days see rain.

a warm layerrain gear

Sea temperature near Ōnojō in December

The nearest coast averages about 18°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 34 km away) is warmest in August at about 27°C and coldest in February near 14°C.

It's comfortable for a long swim from Jun 9 to Nov 20 — about 5.4 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan16Cool
Feb14Bracing
Mar14Bracing
Apr15Cool
May18Cool
Jun21Refreshing
Jul24Warm
Aug27Warm
Sep25Warm
Oct23Refreshing
Nov20Refreshing
Dec18Cool

UV index in Ōnojō in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 3. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Ōnojō peaks around July 21 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 3 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateJul 21UV 9Dec 22UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar6High
Apr8Very high
May8Very high
Jun7Very high
Jul9Very high
Aug9Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Ōnojō 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 Ōnojō is worst in April — around 25 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (October, 12 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1225 µg/m³Oct 1212 µg/m³
PM2.5 (µg/m³)Level
Jan17Moderate
Feb20Moderate
Mar25Moderate
Apr25Moderate
May23Moderate
Jun18Moderate
Jul13Moderate
Aug15Moderate
Sep13Moderate
Oct12Moderate
Nov15Moderate
Dec14Moderate
Location & terrain

Where is Ōnojō?

Ōnojō sits at 33.5°N, 130.5°E, 25 m above sea level, in Japan. The nearest listed city is Kasuga, 2.0 km away.

Topography around Ōnojō

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

Within 3 km, the terrain around Ōnojō has significant variations in elevation — a maximum elevation change of 370 m around an average of 51 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,042 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,509 m.

The land around Ōnojō is covered by artificial surfaces (75%) and trees (20%) within 3 km, trees (52%) and artificial surfaces (33%) within 16 km, and water (42%) and trees (41%) within 80 km.

3 km
370 m
16 km
1,042 m
80 km
1,509 m
treesgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Kasuga 2.0 km · Umi 5.0 km · Dazaifu 5.0 km · Katanawa 5.0 km · Chikushino-shi 6.0 km · Shime 6.0 km · Sue 7.0 km · Fukuoka 9.0 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 Ōnojō (33.5357°, 130.4786°, elevation 25 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).