Guyuan climate

Name: Guyuan
Address: CN

Guyuan is warmest in July, with average highs of 25 °C, and coldest in January, when nights average -12 °C. August is the wettest month (126 mm) and December the driest (4.5 mm). Figures are 1991–2020 climate normals.

Across a full year Guyuan averages 607 mm of rain, 39 days above 25 °C and 157 days below freezing.

China · population 411,854 · 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 25 °C
Coldest month January -12 °C
Driest month December 5 mm
Wettest month August 126 mm
Least cloud December 40 % cloud
Hottest on record July 33 °C
Coldest on record January -29 °C

What to expectGuyuan through the year

Guyuan has a clear annual cycle: average daily highs run from -0.4 °C in January to 25 °C in July, a swing of 26 °C in mean temperature across the year.

Counted across a normal year, 39 days a year reach 25 °C, 1 of them reach 30 °C, 157 nights drop below freezing. The warmest reading in the 1991–2020 record is 33 °C, in July.

Rain is strongly seasonal. August averages 126 mm against 5 mm in December — 28 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	-0.4 °C	8 mm	48 %
February	2.9 °C	11 mm	54 %
March	8.5 °C	25 mm	59 %
April	15.0 °C	35 mm	58 %
May	19.5 °C	52 mm	63 %
June	23.3 °C	72 mm	62 %
July	24.8 °C	112 mm	57 %
August	23.2 °C	126 mm	58 %
September	18.6 °C	92 mm	63 %
October	13.1 °C	54 mm	58 %
November	7.0 °C	16 mm	45 %
December	1.4 °C	5 mm	40 %

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	-0.4 °C	-11.8 °C	-6.3 °C	13.5 °C	-29.3 °C	0	0	31
February	2.9 °C	-8.2 °C	-2.8 °C	15.9 °C	-25.6 °C	0	0	28
March	8.5 °C	-3.2 °C	2.6 °C	21.8 °C	-16.2 °C	0	0	26
April	15.0 °C	2.3 °C	8.7 °C	27.7 °C	-9.8 °C	0	0	8
May	19.5 °C	7.5 °C	13.6 °C	28.6 °C	-5.2 °C	2	0	0
June	23.3 °C	12.0 °C	17.9 °C	31.3 °C	4.4 °C	10	0	0
July	24.8 °C	14.7 °C	19.8 °C	32.9 °C	8.0 °C	16	1	0
August	23.2 °C	13.9 °C	18.4 °C	30.7 °C	5.1 °C	9	0	0
September	18.6 °C	9.3 °C	13.8 °C	29.4 °C	-1.0 °C	1	0	0
October	13.1 °C	2.6 °C	7.7 °C	25.4 °C	-11.2 °C	0	0	7
November	7.0 °C	-3.9 °C	1.2 °C	18.2 °C	-17.8 °C	0	0	26
December	1.4 °C	-9.1 °C	-4.4 °C	10.5 °C	-27.4 °C	0	0	31

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	8 mm	3	10.0 h/day	48 %	57 %	16 km/h
February	11 mm	3	11 h/day	54 %	58 %	17 km/h
March	25 mm	6	12 h/day	59 %	57 %	19 km/h
April	35 mm	7	13 h/day	58 %	55 %	20 km/h
May	52 mm	8	14 h/day	63 %	55 %	19 km/h
June	72 mm	9	15 h/day	62 %	61 %	17 km/h
July	112 mm	12	14 h/day	57 %	69 %	16 km/h
August	126 mm	12	14 h/day	58 %	73 %	16 km/h
September	92 mm	11	12 h/day	63 %	74 %	16 km/h
October	54 mm	9	11 h/day	58 %	70 %	16 km/h
November	16 mm	4	10 h/day	45 %	65 %	16 km/h
December	5 mm	2	9.7 h/day	40 %	56 %	16 km/h

How Guyuan 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
Guyuan	25 °C	-12 °C	607 mm	39
Pingliang · China	27 °C	-8.5 °C	715 mm	68
Qingyang · China	27 °C	-9.0 °C	642 mm	76
Dingxi · China	25 °C	-11 °C	553 mm	40
Tianshui · China	28 °C	-5.6 °C	757 mm	86
Baiyin · China	28 °C	-12 °C	325 mm	74
Baoji · China	31 °C	-2.9 °C	733 mm	118

Where Guyuan ranks

Ranking	Position	Value
Places with the best weather in Asia in June	13thof 50	91/100
The coolest places in Asia in September	18thof 50	19 °C
The coolest places in Asia in August	23rdof 50	23 °C
Places with the best weather in Asia in July	28thof 50	84/100
Places with the best weather in Asia in August	34thof 50	85/100
The coolest places in Asia in October	43rdof 50	13 °C

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

QuestionsCommon questions about Guyuan’s climate

When is the best time to visit Guyuan?

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

How hot does Guyuan get?

In July, the warmest month, daily highs average 25 °C. About 1 days a year pass 30 °C. The highest value in the 1991–2020 record is 33 °C.

How cold does it get in winter?

Nights average -12 °C in January, the coldest month. A normal year has 157 nights below freezing.

Which month is wettest in Guyuan?

August, averaging 126 mm over 12 days with rain. The driest month is December with 5 mm. The year as a whole averages 607 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 Guyuan 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.