Uwa weather in December

In December, Uwa sees average daytime highs of 13°C and overnight lows near 6°C, with 74 mm of precipitation across 8.8 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 15°C in the first days to 11°C by the end. The sky is clear or mostly clear about 34% of the time in December, and the air most often feels dry.

Daylight stretches from about 10 hours at the start of December to 9 h 48 min by month's end. Set against the rest of the year, December is Uwa's 3rd-clearest and 3rd-windiest month. For the whole year in context, see Uwa's year-round climate.

Daytime high
13°
10th warmest
Overnight low
3rd coldest
Precipitation
74 mm
8.8 wet days
Daylight
9 h 48 min
7:12 AM – 5:00 PM
Cloud cover
53%
3rd clearest
Wind
14 km/h
3rd windiest
Solar energy
2.47 kWh/m²
Travel score
3.7
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 15°C in the first days to 11°C by the end.

A typical December day in Uwa reaches about 13°C in the afternoon and slips back to 6°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 8°C and 17°C. Set against its neighbours, December runs about 5°C cooler than November and about 2°C warmer than January.

10°15°20°151015202531
Avg high (°C)Avg low (°C)
1157
2157
3157
4147
5147
6147
7147
8146
9146
10136
11136
12136
13136
14136
15136
16125
17125
18125
19125
20125
21125
22125
23125
24125
25125
26125
27115
28114
29114
30114
31114

How December really feels in Uwa

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.

Uwa 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° / 608.61.1102.5
Feb11° / 748.90.810.82.9
Mar15° / 11211.10.111.74.4
Apr19° / 11°12910.4012.86.1
May24° / 16°15010.4013.76.7
Jun26° / 20°27315.4014.25.5
Jul30° / 24°20113.80144.5
Aug31° / 24°13712.8013.24.0
Sep28° / 21°17812.7012.25.5
Oct23° / 16°1418.7011.27.2
Nov18° / 10°837.9010.36.2
Dec13° / 748.80.39.83.7

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 34% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 21% of December, with mostly cloudy or overcast conditions the remaining 45%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15743
25743
35743
45644
55644
65644
75545
85545
95545
105446
115446
125446
135446
145446
155446
165446
175446
185446
195446
205446
215545
225545
235545
245644
255644
265644
275743
285743
295743
305743
315545

Chance of precipitation in December

Any precipitationSnow

Uwa gets around 74 mm of rain and snow over 8.8 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 28% and peaks near 30% on the wettest days, and about 0 day brings snow.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
1300
2300
3300
4300
5300
6300
7290
8290
9280
10281
11271
12271
13271
14261
15261
16261
17261
18261
19261
20261
21261
22271
23272
24272
25272
26272
27272
28272
29272
30272
31273

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 98% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
19541
29541
39631
49631
59631
69631
79631
89721
99820
109820
119820
129820
139820
149820
159820
169820
179820
189820
199820
209910
219910
229910
239910
249910
259910
269910
279910
289910
299910
3010000
3110000

Wind in December

Winds average 14 km/h in December.

Across December, daily wind ranges from about 12 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
112light 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
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 10 hours 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 12 minutes over December. Sunrise moves from 7:01 AM to 7:19 AM, and sunset from 4:58 PM to 5:08 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.07:014:58
29.97:024:58
39.97:034:58
49.97:044:58
59.97:044:58
69.97:054:58
79.97:064:58
89.97:074:58
99.97:074:59
109.87:084:59
119.87:094:59
129.87:104:59
139.87:104:59
149.87:115:00
159.87:115:00
169.87:125:00
179.87:135:01
189.87:135:01
199.87:145:01
209.87:145:02
219.87:155:02
229.87:155:03
239.87:165:03
249.87:165:04
259.87:175:04
269.87:175:05
279.87:175:05
289.87:185:06
299.87:185:06
309.87:185:07
319.87:195:08

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.47 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.47 kWh/m² to a high of 5.46 kWh/m² in May across the year — December's 2.47 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.5Moderate
22.5Moderate
32.5Moderate
42.5Moderate
52.5Moderate
62.5Moderate
72.5Moderate
82.5Moderate
92.5Moderate
102.5Moderate
112.5Moderate
122.5Moderate
132.5Moderate
142.5Moderate
152.5Moderate
162.5Moderate
172.5Moderate
182.5Moderate
192.5Moderate
202.5Moderate
212.5Moderate
222.5Moderate
232.5Moderate
242.5Moderate
252.5Moderate
262.5Moderate
272.5Moderate
282.6Moderate
292.6Moderate
302.6Moderate
312.6Moderate
Planning a trip in December

Hazard calendar for Uwa

In seasonPeak

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

Uwa 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 Uwa?

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

3.7
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 Uwa.

What to pack for Uwa in December

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

In December, Uwa sees daytime highs around 13°C and nights near 6°C. Worth packing: a warm layer and rain gear. About 9 days see rain.

a warm layerrain gear

Sea temperature near Uwa 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 13 km away) is warmest in August at about 26°C and coldest in February near 15°C.

It's comfortable for a long swim from Jun 3 to Nov 25 — about 5.8 months when the water holds above 20°C.

15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan16Cool
Feb15Bracing
Mar15Bracing
Apr16Cool
May18Cool
Jun21Refreshing
Jul24Warm
Aug26Warm
Sep25Warm
Oct23Refreshing
Nov21Refreshing
Dec18Cool

UV index in Uwa 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 Uwa peaks around June 22 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highModerateJun 22UV 10Dec 21UV 3
UV index (midday)Level
Jan3Moderate
Feb5Moderate
Mar6High
Apr7Very high
May8Very high
Jun10Extreme
Jul10Extreme
Aug9Very high
Sep10Very high
Oct7High
Nov4Moderate
Dec3Moderate

Air quality in Uwa 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 Uwa is worst in April — around 20 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (October, 10 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodApr 1420 µg/m³Oct 1410 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb15Moderate
Mar19Moderate
Apr20Moderate
May18Moderate
Jun15Moderate
Jul11Good
Aug11Good
Sep10Good
Oct10Good
Nov11Good
Dec10Good
Location & terrain

Where is Uwa?

Uwa sits at 33.4°N, 132.5°E, 215 m above sea level, in Japan. The nearest listed city is Yawatahama, 13 km away.

Topography around Uwa

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

Within 3 km, the terrain around Uwa has significant variations in elevation — a maximum elevation change of 390 m around an average of 296 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 902 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,895 m.

The land around Uwa is covered by trees (69%) within 3 km, trees (70%) and water (23%) within 16 km, and water (54%) and trees (43%) within 80 km.

3 km
390 m
16 km
902 m
80 km
1,895 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Yawatahama 13 km · Ōzu 15 km · Uwajima 16 km · Uchiko 24 km · Mishōhirajō 45 km · Iyo 46 km · Masaki-chō 51 km · Haramachi 52 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 Uwa (33.3645°, 132.5127°, elevation 215 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).