Keelung weather in December

In December, Keelung sees average daytime highs of 19°C and overnight lows near 17°C, with 186 mm of rain across 18.9 wet days and about 10.5 hours of daylight. It is the 10th-warmest and 4th-wettest month of the year here.

Highs ease over the month, from about 20°C in the first days to 18°C by the end. The sky is clear or mostly clear about 17% of the time in December, and the air most often feels dry.

Daylight stretches from about 10 h 30 min at the start of December to 10 h 30 min by month's end. Set against the rest of the year, December is Keelung's 9th-clearest and 1st-windiest month. For the whole year in context, see Keelung's year-round climate.

Daytime high
19°
10th warmest
Overnight low
17°
4th coldest
Rainfall
186 mm
18.9 wet days
Daylight
10 h 24 min
6:36 AM – 5:03 PM
Cloud cover
75%
9th clearest
Wind
26 km/h
1st windiest
Solar energy
2.08 kWh/m²
Travel score
4.8
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 20°C in the first days to 18°C by the end.

A typical December day in Keelung reaches about 19°C in the afternoon and slips back to 17°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 22°C. Set against its neighbours, December runs about 3°C cooler than November and about 2°C warmer than January.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
12119
22119
32018
42018
52018
62018
72018
82018
92018
102018
112017
122017
131917
141917
151917
161917
171917
181917
191917
201917
211917
221917
231916
241916
251916
261816
271816
281816
291816
301816
311816

How December really feels in Keelung

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.

Keelung weather by month

How December compares with the rest of the year at a glance. December is the 10th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan18° / 15°17819.410.64.3
Feb18° / 15°17217.111.14.5
Mar20° / 17°16017.611.85.1
Apr23° / 20°13314.512.65.9
May25° / 23°16314.213.26.0
Jun28° / 26°14113.213.55.4
Jul29° / 27°1039.213.45.5
Aug29° / 27°17112.812.95.3
Sep27° / 26°19215.212.25.7
Oct25° / 23°20515.511.46.0
Nov22° / 20°19517.610.85.4
Dec19° / 17°18618.910.54.8

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 17% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 11% of December, with mostly cloudy or overcast conditions the remaining 72%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13070
23070
33070
43070
53070
63070
72872
82872
92872
102773
112773
122773
132674
142773
152773
162773
172872
182773
192773
202872
212872
222872
232872
242971
252971
262971
273070
282971
292971
302971
312971

Chance of precipitation in December

Any precipitation

Keelung gets around 186 mm of rain over 18.9 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 61% and peaks near 64% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
164
263
363
463
562
662
762
863
963
1063
1163
1264
1364
1464
1563
1663
1763
1862
1961
2061
2160
2259
2359
2458
2557
2656
2756
2855
2955
3056
3156

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 38% of days. Sticky, muggy-or-worse air turns up on roughly 11% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1252330202
2262330192
3272429182
4282529172
5292528162
6302628151
7312727141
8322727131
9332826131
10332826121
11342826111
12342826111
13352826110
14362826100
15362826100
1637282690
1738272590
1839272590
1940272580
2041272480
2142262480
2244262370
2345262270
2446262270
2546272160
2647272060
2747272050
2848281950
2948281950
3048281940
3148291940

Wind in December

Winds average 26 km/h in December, the windiest month of the year.

Across December, daily wind ranges from about 24 km/h on the calmest days to 26 km/h at its breeziest. It stays fairly steady from day to day.

0102030151015202531
Wind speed (km/h)Feels
125breezy
225breezy
325breezy
426breezy
526breezy
626breezy
726breezy
826breezy
926breezy
1026breezy
1126breezy
1226breezy
1326breezy
1426breezy
1526breezy
1626breezy
1725breezy
1825breezy
1925breezy
2025breezy
2125breezy
2225breezy
2325breezy
2425breezy
2525breezy
2625breezy
2725breezy
2824breezy
2924breezy
3024breezy
3124breezy

Sunrise & sunset in December

DaylightNight

Daylight runs from about 10 h 30 min at the start of December to 10 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 0 minutes over December. Sunrise moves from 6:26 AM to 6:42 AM, and sunset from 4:59 PM to 5:10 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.56:264:59
210.56:274:59
310.56:284:59
410.56:285:00
510.56:295:00
610.56:305:00
710.56:305:00
810.56:315:00
910.56:325:00
1010.56:325:01
1110.56:335:01
1210.56:345:01
1310.56:345:02
1410.56:355:02
1510.46:355:02
1610.46:365:03
1710.46:365:03
1810.46:375:03
1910.46:375:04
2010.46:385:04
2110.46:385:05
2210.46:395:05
2310.46:395:06
2410.46:405:06
2510.46:405:07
2610.46:415:07
2710.46:415:08
2810.46:415:08
2910.46:425:09
3010.56:425:09
3110.56:425:10

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.08 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.08 kWh/m² to a high of 6.15 kWh/m² in July across the year — December's 2.08 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.2Moderate
22.2Moderate
32.2Moderate
42.2Moderate
52.2Moderate
62.1Moderate
72.1Moderate
82.1Moderate
92.1Moderate
102.1Moderate
112.1Moderate
122.1Moderate
132.1Moderate
142.0Moderate
152.0Moderate
162.0Moderate
172.0Moderate
182.1Moderate
192.1Moderate
202.1Moderate
212.1Moderate
222.1Moderate
232.1Moderate
242.1Moderate
252.1Moderate
262.1Moderate
272.2Moderate
282.2Moderate
292.2Moderate
302.2Moderate
312.2Moderate
Planning a trip in December

Hazard calendar for Keelung

In seasonPeak

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

Keelung 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 Keelung?

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

4.8
Sightseeing
10th-best month of the year
2.2
Beach & pool
10th-best month of the year

December is a reasonable time to visit Keelung for sightseeing.

What to pack for Keelung in December

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

In December, Keelung sees daytime highs around 19°C and nights near 17°C. Pack rain gear. Worth having: a windbreaker. About 19 days see rain.

rain geara windbreaker

Sea temperature near Keelung in December

The nearest coast averages about 23°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 14 km away) is warmest in August at about 28°C and coldest in January near 21°C.

The water stays above 20°C all year — warm enough for a swim any month.

20°25°30°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan21Refreshing
Feb21Refreshing
Mar22Refreshing
Apr24Refreshing
May25Warm
Jun27Warm
Jul28Tropical
Aug28Tropical
Sep27Warm
Oct26Warm
Nov24Warm
Dec23Refreshing

UV index in Keelung in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Keelung peaks around June 18 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 4 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highVery highHighJun 18UV 11Dec 22UV 4
UV index (midday)Level
Jan5Moderate
Feb7Very high
Mar9Very high
Apr8Very high
May10Extreme
Jun12Extreme
Jul11Extreme
Aug9Very high
Sep11Extreme
Oct8Very high
Nov7High
Dec4Moderate

Air quality in Keelung 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 Keelung is worst in April — around 47 µg/m³ PM2.5 (poor), about 2.3× the cleanest month (October, 20 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateApr 1447 µg/m³Oct 1521 µg/m³
PM2.5 (µg/m³)Level
Jan29Moderate
Feb36Poor
Mar44Poor
Apr47Poor
May42Poor
Jun42Poor
Jul34Moderate
Aug28Moderate
Sep24Moderate
Oct20Moderate
Nov25Moderate
Dec25Moderate
Location & terrain

Where is Keelung?

Keelung sits at 25.1°N, 121.7°E, 19 m above sea level, in Taiwan. The nearest listed city is Jiufen, 11 km away.

TaipeiSanzhiNew Taipei CityDanshuiBanqiao

Topography around Keelung

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

Within 3 km, the terrain around Keelung has only modest variations in elevation — a maximum elevation change of 197 m around an average of 58 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 907 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,613 m.

The land around Keelung is covered by trees (58%) and artificial surfaces (32%) within 3 km, trees (59%) and water (35%) within 16 km, and water (62%) and trees (31%) within 80 km.

3 km
197 m
16 km
907 m
80 km
2,613 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Jiufen 11 km · Xizhi 11 km · Neihu 16 km · Taipei 23 km · Sanzhi 28 km · New Taipei City 30 km · Danshui 30 km · Banqiao 30 km

Taiwan travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type A / B
110 / 220 V · 60 Hz
Happiness
6.7 / 10
World Happiness, 2025
Religion
Buddhist 35%Taoist 33%none or unspecified 18%folk religion approximately 10%

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 Keelung (25.1309°, 121.7409°, elevation 19 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).