Mengzi climate

Name: Mengzi
Address: CN

Mengzi is warmest in May, with average highs of 27 °C, and coldest in January, when nights average 8.2 °C. July is the wettest month (278 mm) and December the driest (26 mm). Figures are 1991–2020 climate normals.

Across a full year Mengzi averages 1,403 mm of rain, 148 days above 25 °C and 1 days below freezing.

China · population 595,100 · 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 May 27 °C
Coldest month January 8.2 °C
Driest month December 26 mm
Wettest month July 278 mm
Least cloud March 58 % cloud
Hottest on record May 35 °C
Coldest on record December -9.1 °C

What to expectMengzi through the year

Mengzi has a clear annual cycle: average daily highs run from 17 °C in January to 27 °C in May, a swing of 11 °C in mean temperature across the year.

Counted across a normal year, 148 days a year reach 25 °C, 12 of them reach 30 °C, 1 nights drop below freezing. The warmest reading in the 1991–2020 record is 35 °C, in May.

Rain is strongly seasonal. July averages 278 mm against 26 mm in December — 11 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	16.6 °C	34 mm	70 %
February	19.5 °C	26 mm	61 %
March	23.5 °C	53 mm	58 %
April	25.9 °C	85 mm	62 %
May	26.7 °C	158 mm	72 %
June	26.7 °C	223 mm	90 %
July	26.0 °C	278 mm	90 %
August	25.9 °C	265 mm	85 %
September	24.8 °C	138 mm	76 %
October	22.4 °C	80 mm	72 %
November	19.9 °C	37 mm	63 %
December	16.8 °C	26 mm	66 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	16.6 °C	8.2 °C	11.9 °C	25.9 °C	-4.4 °C	0	0
February	19.5 °C	9.9 °C	14.2 °C	29.8 °C	0.3 °C	4	0
March	23.5 °C	13.1 °C	17.8 °C	32.1 °C	1.4 °C	13	1
April	25.9 °C	16.2 °C	20.5 °C	34.0 °C	4.8 °C	19	4
May	26.7 °C	18.1 °C	21.9 °C	35.2 °C	9.7 °C	23	5
June	26.7 °C	19.7 °C	22.5 °C	33.4 °C	13.2 °C	24	2
July	26.0 °C	19.6 °C	22.2 °C	31.4 °C	15.8 °C	22	0
August	25.9 °C	19.2 °C	22.0 °C	30.7 °C	13.4 °C	23	0
September	24.8 °C	17.8 °C	20.9 °C	30.1 °C	9.6 °C	16	0
October	22.4 °C	15.4 °C	18.4 °C	27.7 °C	7.0 °C	5	0
November	19.9 °C	11.7 °C	15.3 °C	27.0 °C	2.5 °C	0	0
December	16.8 °C	8.3 °C	12.0 °C	24.6 °C	-9.1 °C	0	0

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	34 mm	7	11 h/day	70 %	82 %	11 km/h
February	26 mm	6	11 h/day	61 %	77 %	13 km/h
March	53 mm	10	12 h/day	58 %	73 %	14 km/h
April	85 mm	14	13 h/day	62 %	74 %	13 km/h
May	158 mm	19	13 h/day	72 %	78 %	12 km/h
June	223 mm	24	14 h/day	90 %	85 %	10 km/h
July	278 mm	26	13 h/day	90 %	88 %	9.1 km/h
August	265 mm	25	13 h/day	85 %	88 %	8.5 km/h
September	138 mm	19	12 h/day	76 %	85 %	9.1 km/h
October	80 mm	15	12 h/day	72 %	84 %	9.6 km/h
November	37 mm	7	11 h/day	63 %	82 %	9.7 km/h
December	26 mm	5	11 h/day	66 %	82 %	10 km/h

How Mengzi 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
Mengzi	27 °C	8.2 °C	1,403 mm	148
Kaiyuan · China	28 °C	8.1 °C	844 mm	192
Wenshan City · China	27 °C	7.4 °C	1,099 mm	145
Kunming · China	25 °C	4.9 °C	1,463 mm	55
Thị Trấn Thuận Châu · Vietnam	29 °C	12 °C	2,034 mm	243
Qujing · China	23 °C	2.7 °C	1,276 mm	40
Ning’er · China	28 °C	9.1 °C	1,848 mm	151

Where Mengzi ranks

Ranking	Position	Value
Places with the best weather in Asia year-round	50th of 50	75/100

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

QuestionsCommon questions about Mengzi’s climate

When is the best time to visit Mengzi?

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

How hot does Mengzi get?

In May, the warmest month, daily highs average 27 °C. About 12 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 8.2 °C in January, the coldest month. A normal year has 1 nights below freezing.

Which month is wettest in Mengzi?

July, averaging 278 mm over 26 days with rain. The driest month is December with 26 mm. The year as a whole averages 1,403 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 Mengzi 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: 23.368°, 103.382° (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.