Keelung climate

Name: Keelung
Address: TW

Keelung is warmest in July, with average highs of 31 °C, and coldest in January, when nights average 15 °C. October is the wettest month (327 mm) and April the driest (134 mm). Figures are 1991–2020 climate normals.

Across a full year Keelung averages 2,471 mm of rain and 185 days above 25 °C.

Taiwan · population 362,487 · 1991–2020 normals

Temperature below 0 °C to above 30 °C Rain band height is that month’s share of the wettest month

Warmest month July 31 °C
Coldest month January 15 °C
Driest month April 134 mm
Wettest month October 327 mm
Least cloud August 62 % cloud
Hottest on record August 35 °C
Coldest on record January 5.0 °C
Warmest sea August 28 °C

What to expectKeelung through the year

Keelung has a clear annual cycle: average daily highs run from 18 °C in January to 31 °C in July, a swing of 12 °C in mean temperature across the year.

Counted across a normal year, 185 days a year reach 25 °C, 60 of them reach 30 °C. The warmest reading in the 1991–2020 record is 35 °C, in August.

Rain is strongly seasonal. October averages 327 mm against 134 mm in April — 2.4 times as much. Planning around the dry months matters more here than planning around temperature.

The sea off Keelung is warmest in August at 28 °C and coldest in January at 21 °C. Sea temperature lags the air by a month or two, which is why late summer swims warmer than early summer at the same air temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	18.0 °C	185 mm	79 %
February	18.7 °C	164 mm	78 %
March	20.9 °C	146 mm	74 %
April	24.0 °C	134 mm	73 %
May	26.8 °C	190 mm	75 %
June	29.3 °C	183 mm	81 %
July	30.6 °C	151 mm	65 %
August	30.2 °C	228 mm	62 %
September	28.4 °C	262 mm	64 %
October	25.3 °C	327 mm	70 %
November	22.8 °C	275 mm	74 %
December	19.5 °C	226 mm	78 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	18.0 °C	14.8 °C	16.4 °C	25.9 °C	5.0 °C	0	0
February	18.7 °C	15.1 °C	16.8 °C	26.6 °C	7.5 °C	0	0
March	20.9 °C	16.9 °C	18.7 °C	28.4 °C	5.9 °C	3	0
April	24.0 °C	19.9 °C	21.8 °C	30.9 °C	11.3 °C	13	0
May	26.8 °C	23.1 °C	24.8 °C	32.2 °C	15.7 °C	24	1
June	29.3 °C	25.5 °C	27.3 °C	33.8 °C	19.6 °C	29	12
July	30.6 °C	26.7 °C	28.6 °C	34.7 °C	23.3 °C	31	22
August	30.2 °C	26.6 °C	28.3 °C	34.8 °C	23.7 °C	31	18
September	28.4 °C	25.3 °C	26.7 °C	34.2 °C	19.7 °C	29	6
October	25.3 °C	22.9 °C	24.0 °C	31.6 °C	17.7 °C	17	0
November	22.8 °C	20.2 °C	21.4 °C	28.6 °C	11.8 °C	6	0
December	19.5 °C	16.6 °C	18.0 °C	27.9 °C	7.1 °C	1	0

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind	Sea temp
January	185 mm	20	11 h/day	79 %	80 %	20 km/h	21.1 °C
February	164 mm	17	11 h/day	78 %	81 %	19 km/h	21.3 °C
March	146 mm	18	12 h/day	74 %	82 %	18 km/h	22.0 °C
April	134 mm	15	13 h/day	73 %	84 %	16 km/h	23.5 °C
May	190 mm	17	13 h/day	75 %	86 %	14 km/h	25.4 °C
June	183 mm	17	14 h/day	81 %	87 %	11 km/h	26.9 °C
July	151 mm	14	14 h/day	65 %	85 %	14 km/h	28.0 °C
August	228 mm	17	13 h/day	62 %	85 %	15 km/h	28.2 °C
September	262 mm	18	12 h/day	64 %	84 %	19 km/h	27.3 °C
October	327 mm	19	12 h/day	70 %	81 %	21 km/h	25.6 °C
November	275 mm	19	11 h/day	74 %	81 %	21 km/h	24.0 °C
December	226 mm	20	11 h/day	78 %	79 %	21 km/h	22.5 °C

How Keelung compares

The same four figures for nearby destinations, so the numbers above have something to be read against. Summer high is the warmest month's average high; winter low is the coldest month's average low.

Destination	Summer high	Winter low	Rain per year	Days above 25 °C
Keelung	31 °C	15 °C	2,471 mm	185
Xizhi · Taiwan	31 °C	15 °C	2,361 mm	185
Neihu · Taiwan	31 °C	14 °C	2,134 mm	189
Taipei · Taiwan	31 °C	14 °C	2,077 mm	189
Danshui · Taiwan	31 °C	14 °C	1,593 mm	184
Taoyuan · Taiwan	30 °C	13 °C	1,522 mm	178
Bade · Taiwan	31 °C	12 °C	1,538 mm	189

Planning a trip? See the best time to visit Keelung.

QuestionsCommon questions about Keelung’s climate

When is the best time to visit Keelung?

That depends on what you want, so the honest answer is a comparison rather than a single month. March, April, November sit closest to 20 °C on average, July is the warmest month and April the driest. The month-by-month table above has the full picture.

How hot does Keelung get?

In July, the warmest month, daily highs average 31 °C. About 60 days a year pass 30 °C. The highest value in the 1991–2020 record is 35 °C.

How cold does it get in winter?

Nights average 15 °C in January, the coldest month. Freezing nights are not part of a normal year here.

Which month is wettest in Keelung?

October, averaging 327 mm over 19 days with rain. The driest month is April with 134 mm. The year as a whole averages 2,471 mm.

Are these figures a forecast?

No. They are 1991–2020 climate normals: the average of thirty years, which describes what a month is usually like in Keelung rather than what any particular week will bring. Individual years can differ substantially from the normal.

Data sources and method

ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
Open-Meteo — Open-Meteo.com. CC BY 4.0
NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
GeoNames — GeoNames.org. CC BY 4.0

Normal period: 1991–2020
Data point: 25.131°, 121.741° (the coordinates the reanalysis values are taken for)
Dataset version: era5-1991-2020-scores1.1
Last processed: 1 August 2026

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: monthly rankings, daylight hours, beach and comfort scores. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.