Climate averages 1991–2020
Mengzi weather
by month.
See how the year changes. May has the highest average daily maximum; December has the lowest average monthly rainfall.
Pleasant-weather months by our simple rule: FebruaryNovember
Long-term climate patterns, not a forecast for a particular trip.
Across the year Mengzi averages a daytime high of 22.8°C and a nighttime low of 14.9°C, with about 1,453 mm of rain on roughly 189 days. May is the warmest month (average high 26.7°C) and January (tied with December) the coolest (16.6°C). July is the wettest month with 281 mm; December is the driest with 27 mm.
Months with pleasant weather by a simple rule (average high between 18°C and 29°C, average low of at least 5°C and at most 8 rain days): February and November. This looks at temperature and rain only, not humidity, wind, sea temperature or crowds.
The annual picture
A year in Mengzi
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Mengzi climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 16.6°C8.4°C | 8.4°C | 36 | 7.6 | 10.911 h |
| February | 19.4°C10.2°C | 10.2°C | 28 | 7.1 | 11.411 h |
| March | 23.5°C13.4°C | 13.4°C | 58 | 11.5 | 12.012 h |
| April | 25.9°C16.2°C | 16.2°C | 91 | 16.0 | 12.713 h |
| May | 26.7°C18.0°C | 18.0°C | 164 | 20.4 | 13.313 h |
| June | 26.5°C19.5°C | 19.5°C | 230 | 24.5 | 13.514 h |
| July | 25.9°C19.5°C | 19.5°C | 281 | 27.1 | 13.413 h |
| August | 25.9°C19.2°C | 19.2°C | 273 | 26.4 | 12.913 h |
| September | 24.8°C17.9°C | 17.9°C | 143 | 20.1 | 12.312 h |
| October | 22.3°C15.5°C | 15.5°C | 84 | 15.1 | 11.612 h |
| November | 19.9°C11.9°C | 11.9°C | 39 | 7.3 | 11.011 h |
| December | 16.6°C8.5°C | 8.5°C | 27 | 5.8 | 10.711 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
Nearby cities
- GejiuChina · 23 kmHigh 21.1°C · Low 13.3°C · 1,174 mm rain a year
- Kaiyuan (Yunnan), ChinaChina · 38 kmHigh 24.1°C · Low 14.8°C · 755 mm rain a year
- Wenshan CityChina · 89 kmHigh 22.9°C · Low 14.5°C · 1,056 mm rain a year
- Lào CaiVietnam · 115 kmHigh 26.8°C · Low 19.6°C · 1,872 mm rain a year
- MiyangChina · 115 kmHigh 23.1°C · Low 13.9°C · 898 mm rain a year
- ZhongshuChina · 134 kmHigh 20.9°C · Low 12.2°C · 1,116 mm rain a year
- YuxiChina · 139 kmHigh 22.2°C · Low 13.5°C · 1,062 mm rain a year
- Haikou, ChinaChina · 177 kmHigh 20.1°C · Low 12.8°C · 1,212 mm rain a year
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsWhat do the high and low temperatures mean?
We average the daily maximum and daily minimum for each calendar month over 1991–2020. They are not record extremes, a forecast range or temperatures at a fixed time of day.
How is a rain day counted?
A local calendar day (standard time, UTC+8, no daylight saving) with at least 1 mm of total precipitation counts as one rain day. We count these for each year and month, then average across 30 years. The average does not predict which days will be wet.
Where do the numbers come from?
ERA5-Land (temperature) and ERA5 (precipitation) reanalysis from the Copernicus Climate Change Service, read from the Open-Meteo open-data archive. Temperature comes from the 0.1° model cell at 23.40°, 103.40° (4 km from the city centre), adjusted up by 0.7°C for the difference between the city's elevation (1,306 m) and the cell's (1,406 m). Rain comes from the 0.25° cell at 23.25°, 103.50°. These are model estimates, not weather-station readings; coast, hills and city streets can differ.
Does this page show sunshine, humidity or sea temperature?
No. The data used here contain air temperature and precipitation only. Daylight hours are calculated from the city's latitude (sunrise to sunset), not measured sunshine.