Climate averages 1991–2020
Cao Bằng weather
by month.
See how the year changes. August has the highest average daily maximum; December has the lowest average monthly rainfall.
Long-term climate patterns, not a forecast for a particular trip.
Across the year Cao Bằng averages a daytime high of 25.5°C and a nighttime low of 18.8°C, with about 1,755 mm of rain on roughly 204 days. August is the warmest month (average high 30.6°C) and January the coolest (17.2°C). July is the wettest month with 302 mm; December is the driest with 50 mm.
The annual picture
A year in Cao Bằng
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
Cao Bằng climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 17.2°C11.3°C | 11.3°C | 66 | 13.3 | 10.911 h |
| February | 19.4°C13.0°C | 13.0°C | 53 | 11.6 | 11.411 h |
| March | 22.8°C16.3°C | 16.3°C | 89 | 16.0 | 12.012 h |
| April | 26.9°C20.0°C | 20.0°C | 111 | 17.1 | 12.713 h |
| May | 29.2°C22.5°C | 22.5°C | 213 | 22.3 | 13.213 h |
| June | 30.5°C24.3°C | 24.3°C | 293 | 25.2 | 13.513 h |
| July | 30.5°C24.6°C | 24.6°C | 302 | 26.4 | 13.413 h |
| August | 30.6°C24.2°C | 24.2°C | 268 | 24.4 | 12.913 h |
| September | 29.4°C22.5°C | 22.5°C | 156 | 16.8 | 12.312 h |
| October | 26.9°C19.7°C | 19.7°C | 87 | 12.0 | 11.612 h |
| November | 23.3°C15.8°C | 15.8°C | 69 | 9.7 | 11.111 h |
| December | 18.9°C11.8°C | 11.8°C | 50 | 9.4 | 10.811 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
- Pingxiang, ChinaChina · 81 kmHigh 24.6°C · Low 17.9°C · 1,465 mm rain a year
- Lạng SơnVietnam · 104 kmHigh 25.3°C · Low 18.7°C · 1,644 mm rain a year
- ChongzuoChina · 118 kmHigh 26.1°C · Low 18.8°C · 1,438 mm rain a year
- Thái NguyênVietnam · 126 kmHigh 26.6°C · Low 20.0°C · 2,089 mm rain a year
- Thị Trấn Đại TừVietnam · 131 kmHigh 27.2°C · Low 20.9°C · 1,979 mm rain a year
- Thành phố Sông CôngVietnam · 139 kmHigh 26.8°C · Low 20.3°C · 2,089 mm rain a year
- BaiseChina · 141 kmHigh 25.5°C · Low 18.0°C · 1,584 mm rain a year
- Tuyên QuangVietnam · 142 kmHigh 26.9°C · Low 20.7°C · 2,009 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+7, 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 22.70°, 106.30° (6 km from the city centre), adjusted up by 1.9°C for the difference between the city's elevation (197 m) and the cell's (495 m). Rain comes from the 0.25° cell at 22.75°, 106.25°. 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.