Ma On Shan climate

Name: Ma On Shan
Address: HK

Ma On Shan is warmest in July, with average highs of 29 °C, and coldest in January, when nights average 12 °C. June is the wettest month (329 mm) and January the driest (25 mm). Figures are 1991–2020 climate normals.

Across a full year Ma On Shan averages 1,749 mm of rain and 191 days above 25 °C.

Hong Kong · population 215,200 · 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 29 °C
Coldest month January 12 °C
Driest month January 25 mm
Wettest month June 329 mm
Least cloud October 44 % cloud
Hottest on record August 35 °C
Coldest on record January 1.5 °C
Warmest sea July 29 °C

What to expectMa On Shan through the year

Ma On Shan has a clear annual cycle: average daily highs run from 18 °C in January to 29 °C in July, a swing of 12 °C in mean temperature across the year.

Counted across a normal year, 191 days a year reach 25 °C, 22 of them reach 30 °C. The warmest reading in the 1991–2020 record is 35 °C, in August.

Rain is strongly seasonal. June averages 329 mm against 25 mm in January — 13 times as much. Planning around the dry months matters more here than planning around temperature.

The sea off Ma On Shan is warmest in July at 29 °C and coldest in January at 20 °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	17.6 °C	25 mm	54 %
February	18.8 °C	35 mm	68 %
March	21.4 °C	73 mm	73 %
April	24.4 °C	129 mm	73 %
May	26.8 °C	232 mm	77 %
June	28.2 °C	329 mm	84 %
July	29.0 °C	253 mm	75 %
August	29.0 °C	324 mm	73 %
September	28.1 °C	216 mm	60 %
October	26.0 °C	71 mm	44 %
November	22.9 °C	35 mm	45 %
December	18.9 °C	29 mm	48 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	17.6 °C	11.8 °C	14.7 °C	25.3 °C	1.5 °C	0	0
February	18.8 °C	13.5 °C	16.0 °C	26.9 °C	3.9 °C	1	0
March	21.4 °C	16.4 °C	18.7 °C	27.8 °C	5.9 °C	3	0
April	24.4 °C	19.9 °C	21.8 °C	30.3 °C	11.3 °C	14	0
May	26.8 °C	22.9 °C	24.6 °C	33.0 °C	16.4 °C	26	1
June	28.2 °C	24.8 °C	26.3 °C	33.8 °C	19.1 °C	29	3
July	29.0 °C	25.2 °C	26.9 °C	34.0 °C	21.3 °C	31	7
August	29.0 °C	25.0 °C	26.7 °C	34.7 °C	22.7 °C	31	8
September	28.1 °C	24.0 °C	25.8 °C	32.9 °C	17.0 °C	29	3
October	26.0 °C	21.2 °C	23.5 °C	33.0 °C	13.1 °C	23	0
November	22.9 °C	17.5 °C	20.1 °C	29.1 °C	7.2 °C	6	0
December	18.9 °C	12.9 °C	15.9 °C	26.2 °C	2.0 °C	0	0

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind	Sea temp
January	25 mm	4	11 h/day	54 %	72 %	17 km/h	19.6 °C
February	35 mm	6	11 h/day	68 %	78 %	17 km/h	19.7 °C
March	73 mm	10	12 h/day	73 %	82 %	18 km/h	20.8 °C
April	129 mm	14	13 h/day	73 %	85 %	17 km/h	22.9 °C
May	232 mm	20	13 h/day	77 %	87 %	16 km/h	25.8 °C
June	329 mm	23	14 h/day	84 %	88 %	17 km/h	27.9 °C
July	253 mm	23	13 h/day	75 %	87 %	17 km/h	28.6 °C
August	324 mm	24	13 h/day	73 %	87 %	15 km/h	28.6 °C
September	216 mm	17	12 h/day	60 %	83 %	16 km/h	28.2 °C
October	71 mm	7	12 h/day	44 %	75 %	17 km/h	26.5 °C
November	35 mm	5	11 h/day	45 %	72 %	17 km/h	23.6 °C
December	29 mm	4	11 h/day	48 %	68 %	17 km/h	20.8 °C

How Ma On Shan 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
Ma On Shan	29 °C	12 °C	1,749 mm	191
Sha Tin · Hong Kong	29 °C	12 °C	1,749 mm	203
Wong Tai Sin · Hong Kong	28 °C	11 °C	1,750 mm	173
Tai Po · Hong Kong	31 °C	12 °C	1,739 mm	229
Kwai Chung · Hong Kong	30 °C	12 °C	1,728 mm	222
Tsuen Wan · Hong Kong	30 °C	13 °C	1,757 mm	229
Hong Kong · Hong Kong	30 °C	13 °C	1,750 mm	213

Planning a trip? See the best time to visit Ma On Shan.

QuestionsCommon questions about Ma On Shan’s climate

When is the best time to visit Ma On Shan?

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 January the driest. The month-by-month table above has the full picture.

How hot does Ma On Shan get?

In July, the warmest month, daily highs average 29 °C. About 22 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 12 °C in January, the coldest month. Freezing nights are not part of a normal year here.

Which month is wettest in Ma On Shan?

June, averaging 329 mm over 23 days with rain. The driest month is January with 25 mm. The year as a whole averages 1,749 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 Ma On Shan 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
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.