Xi’an climate

Name: Xi’an
Address: CN

Xi’an is warmest in July, with average highs of 32 °C, and coldest in January, when nights average -4.1 °C. July is the wettest month (142 mm) and January the driest (12 mm). Figures are 1991–2020 climate normals.

Across a full year Xi’an averages 797 mm of rain, 128 days above 25 °C and 88 days below freezing.

China · population 9,600,000 · 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 32 °C
Coldest month January -4.1 °C
Driest month January 12 mm
Wettest month July 142 mm
Least cloud December 41 % cloud
Hottest on record July 43 °C
Coldest on record January -15 °C

What to expectXi’an through the year

Xi’an has a clear annual cycle: average daily highs run from 5.8 °C in January to 32 °C in July, a swing of 26 °C in mean temperature across the year.

Counted across a normal year, 128 days a year reach 25 °C, 68 of them reach 30 °C, 88 nights drop below freezing. The warmest reading in the 1991–2020 record is 43 °C, in July.

Rain is strongly seasonal. July averages 142 mm against 12 mm in January — 12 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	5.8 °C	12 mm	47 %
February	9.6 °C	18 mm	55 %
March	15.5 °C	32 mm	59 %
April	21.8 °C	46 mm	59 %
May	26.3 °C	70 mm	65 %
June	30.4 °C	88 mm	61 %
July	31.6 °C	142 mm	57 %
August	30.0 °C	128 mm	54 %
September	24.7 °C	130 mm	60 %
October	19.1 °C	79 mm	59 %
November	12.9 °C	40 mm	48 %
December	7.3 °C	13 mm	41 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C	Days below 0 °C
January	5.8 °C	-4.1 °C	0.5 °C	19.7 °C	-15.3 °C	0	0	30
February	9.6 °C	-1.5 °C	4.0 °C	21.1 °C	-12.7 °C	0	0	20
March	15.5 °C	3.6 °C	9.5 °C	30.0 °C	-7.1 °C	1	0	5
April	21.8 °C	9.7 °C	15.6 °C	35.1 °C	-0.1 °C	8	2	0
May	26.3 °C	14.7 °C	20.3 °C	37.5 °C	3.6 °C	19	8	0
June	30.4 °C	19.3 °C	24.8 °C	39.7 °C	10.4 °C	26	18	0
July	31.6 °C	22.0 °C	26.7 °C	43.1 °C	14.7 °C	29	21	0
August	30.0 °C	21.0 °C	25.3 °C	40.8 °C	12.9 °C	27	16	0
September	24.7 °C	16.0 °C	20.2 °C	37.6 °C	6.8 °C	14	3	0
October	19.1 °C	9.8 °C	14.3 °C	32.3 °C	-0.4 °C	2	0	0
November	12.9 °C	2.8 °C	7.7 °C	24.6 °C	-6.9 °C	0	0	7
December	7.3 °C	-2.8 °C	1.9 °C	16.6 °C	-12.6 °C	0	0	27

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	12 mm	3	10 h/day	47 %	58 %	8.6 km/h
February	18 mm	4	11 h/day	55 %	59 %	9.5 km/h
March	32 mm	6	12 h/day	59 %	56 %	11 km/h
April	46 mm	7	13 h/day	59 %	55 %	11 km/h
May	70 mm	8	14 h/day	65 %	55 %	11 km/h
June	88 mm	8	14 h/day	61 %	58 %	10 km/h
July	142 mm	11	14 h/day	57 %	66 %	9.7 km/h
August	128 mm	11	13 h/day	54 %	68 %	9.7 km/h
September	130 mm	12	12 h/day	60 %	71 %	9.2 km/h
October	79 mm	10	11 h/day	59 %	69 %	9.0 km/h
November	40 mm	7	10 h/day	48 %	66 %	9.0 km/h
December	13 mm	3	9.9 h/day	41 %	59 %	8.9 km/h

How Xi’an 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
Xi’an	32 °C	-4.1 °C	797 mm	128
Xianyang · China	31 °C	-4.0 °C	845 mm	125
Weinan · China	33 °C	-3.5 °C	614 mm	144
Tongchuan · China	31 °C	-5.0 °C	608 mm	118
Tongchuanshi · China	30 °C	-4.7 °C	613 mm	113
Shangluo · China	29 °C	-4.7 °C	782 mm	105
Huayin · China	32 °C	-3.0 °C	994 mm	145

Planning a trip? See the best time to visit Xi’an.

QuestionsCommon questions about Xi’an’s climate

When is the best time to visit Xi’an?

That depends on what you want, so the honest answer is a comparison rather than a single month. April, May, September 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 Xi’an get?

In July, the warmest month, daily highs average 32 °C. About 68 days a year pass 30 °C. The highest value in the 1991–2020 record is 43 °C.

How cold does it get in winter?

Nights average -4.1 °C in January, the coldest month. A normal year has 88 nights below freezing.

Which month is wettest in Xi’an?

July, averaging 142 mm over 11 days with rain. The driest month is January with 12 mm. The year as a whole averages 797 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 Xi’an 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: 34.258°, 108.929° (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.