Jiufen weather in January

In January, Jiufen sees average daytime highs of 17°C and overnight lows near 14°C, with 174 mm of rain across 20.1 wet days and about 10.6 hours of daylight. It is the 12th-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 17°C through the month. The sky is clear or mostly clear about 14% of the time in January, and the air most often feels dry.

Daylight stretches from about 10 h 30 min at the start of January to 10 h 48 min by month's end. Set against the rest of the year, January is Jiufen's 10th-clearest and 4th-windiest month. For the whole year in context, see Jiufen's year-round climate.

Daytime high
17°
12th warmest
Overnight low
14°
1st coldest
Rainfall
174 mm
20.1 wet days
Daylight
10 h 36 min
6:44 AM – 5:20 PM
Cloud cover
78%
10th clearest
Wind
15 km/h
4th windiest
Solar energy
2.21 kWh/m²
Travel score
4.1
out of 10

Jiufen is mountain area in Ruifang District near Keelung, Taiwan.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 17°C through the month.

A typical January day in Jiufen reaches about 17°C in the afternoon and slips back to 14°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 13°C and 21°C. Set against its neighbours, January runs about 2°C cooler than December and on par with February.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
11815
21815
31815
41815
51815
61815
71815
81815
91815
101815
111815
121815
131714
141714
151714
161714
171714
181714
191714
201714
211714
221714
231714
241714
251714
261714
271714
281714
291714
301714
311714

How January really feels in Jiufen

Once humidity and wind are folded in, January 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

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

Jiufen weather by month

How January compares with the rest of the year at a glance. January is the 12th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan17° / 14°17420.110.64.1
Feb18° / 15°16017.711.14.4
Mar20° / 16°1371711.85.1
Apr23° / 19°12815.512.65.7
May26° / 22°18517.613.25.4
Jun29° / 25°16316.313.54.5
Jul30° / 27°1541413.44.4
Aug30° / 27°22317.612.94.2
Sep28° / 25°25717.812.24.9
Oct25° / 22°31319.311.45.3
Nov22° / 20°27819.210.85.1
Dec19° / 16°22719.510.54.6

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 14% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 9% of January, with mostly cloudy or overcast conditions the remaining 77%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12773
22872
32872
42773
52674
62674
72674
82674
92476
102476
112476
122476
132377
142278
152179
162179
172080
182080
192080
202179
212179
222179
232179
242179
252278
262179
272179
282179
292080
302179
312179

Chance of precipitation in January

Any precipitation

Jiufen gets around 174 mm of rain over 20.1 wet days in January. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 66% and peaks near 69% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
159
259
360
461
561
662
762
863
964
1065
1165
1266
1366
1467
1567
1667
1767
1868
1968
2068
2169
2269
2369
2469
2569
2669
2769
2869
2968
3068
3167

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

Most of January feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, January lands in the dry band about 53% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
14830203
24830203
34830203
44829203
54829203
64829203
74929203
84928203
94928203
104928203
114928203
125027203
135027203
145027203
155226202
165226202
175326192
185425192
195525182
205526172
215626171
225726161
235726161
245727151
255727151
265728141
275728141
285728141
295629141
305629141
315629141

Wind in January

Winds average 15 km/h in January.

Across January, daily wind ranges from about 15 km/h on the calmest days to 15 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
115light breeze
215light breeze
315light breeze
415light breeze
515light breeze
615light breeze
715light breeze
815light breeze
915light breeze
1015light breeze
1115light breeze
1215light breeze
1315light breeze
1415light breeze
1515light breeze
1615light breeze
1715light breeze
1815light breeze
1915light breeze
2015light breeze
2115light breeze
2215light breeze
2315light breeze
2415light breeze
2515light breeze
2615light breeze
2715light breeze
2815light breeze
2915light breeze
3015light breeze
3115light breeze

Sunrise & sunset in January

DaylightNight

Daylight runs from about 10 h 30 min at the start of January to 10 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 18 minutes over January. Sunrise moves from 6:42 AM to 6:41 AM, and sunset from 5:10 PM to 5:31 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.56:425:10
210.56:425:10
310.56:425:11
410.56:435:12
510.56:435:12
610.56:435:13
710.56:435:14
810.56:435:14
910.56:445:15
1010.56:445:16
1110.56:445:16
1210.66:445:17
1310.66:445:18
1410.66:445:18
1510.66:445:19
1610.66:445:20
1710.66:445:21
1810.66:445:21
1910.66:445:22
2010.66:445:23
2110.76:445:23
2210.76:445:24
2310.76:435:25
2410.76:435:26
2510.76:435:26
2610.76:435:27
2710.86:425:28
2810.86:425:29
2910.86:425:29
3010.86:425:30
3110.86:415:31

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 2.21 kWh/m².

For context, solar energy here swings from a low near 2.02 kWh/m² to a high of 5.9 kWh/m² in July across the year — January's 2.21 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.2Moderate
22.2Moderate
32.2Moderate
42.2Moderate
52.2Moderate
62.2Moderate
72.2Moderate
82.2Moderate
92.2Moderate
102.2Moderate
112.2Moderate
122.2Moderate
132.2Moderate
142.2Moderate
152.2Moderate
162.2Moderate
172.2Moderate
182.2Moderate
192.2Moderate
202.2Moderate
212.2Moderate
222.2Moderate
232.2Moderate
242.2Moderate
252.2Moderate
262.2Moderate
272.2Moderate
282.3Moderate
292.3Moderate
302.3Moderate
312.3Moderate
Planning a trip in January

Hazard calendar for Jiufen

In seasonPeak

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

Jiufen 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 January a good time to visit Jiufen?

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

4.1
Sightseeing
12th-best month of the year
1.1
Beach & pool
12th-best month of the year

January is a reasonable time to visit Jiufen for sightseeing.

What to pack for Jiufen in January

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

In January, Jiufen sees daytime highs around 17°C and nights near 14°C. Pack rain gear. About 20 days see rain.

rain gear

Sea temperature near Jiufen in January

The nearest coast averages about 21°C in January — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore 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 Jiufen in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Jiufen peaks around July 13 at about 12 (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.

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highExtremeVery highHighJul 13UV 12Dec 22UV 4
UV index (midday)Level
Jan5Moderate
Feb7Very high
Mar9Very high
Apr8Very high
May10Extreme
Jun11Extreme
Jul12Extreme
Aug11Extreme
Sep11Extreme
Oct8Very high
Nov7High
Dec4Moderate

Air quality in Jiufen in January

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where January falls, not just the annual average.

Air quality in Jiufen is worst in April — around 52 µg/m³ PM2.5 (poor), about 2.1× the cleanest month (October, 25 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorModerateApr 1052 µg/m³Oct 1626 µg/m³
PM2.5 (µg/m³)Level
Jan38Poor
Feb43Poor
Mar51Poor
Apr52Poor
May44Poor
Jun41Poor
Jul32Moderate
Aug32Moderate
Sep30Moderate
Oct25Moderate
Nov32Moderate
Dec32Moderate
Location & terrain

Where is Jiufen?

Jiufen sits at 25.1°N, 121.8°E, 0 m above sea level, in Taiwan. The nearest listed city is Keelung, 11 km away.

NeihuTaipeiSanzhiNew Taipei CityBanqiaoYilan

Topography around Jiufen

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

Within 3 km, the terrain around Jiufen has large variations in elevation — a maximum elevation change of 710 m around an average of 221 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 752 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,425 m.

The land around Jiufen is covered by trees (77%) within 3 km, trees (48%) and water (48%) within 16 km, and water (64%) and trees (29%) within 80 km.

3 km
710 m
16 km
752 m
80 km
2,425 m
treescroplandartificial surfaceswater
January weather nearby: Keelung 11 km · Xizhi 19 km · Neihu 26 km · Taipei 33 km · Sanzhi 38 km · New Taipei City 39 km · Banqiao 39 km · Yilan 40 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 Jiufen (25.1096°, 121.8442°, elevation 0 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).