Climate averages 1991–2020
Cao Bằng weather
in May.
A hot, very wet month: the 5th warmest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a hot month in Cao Bằng: daytime highs average 29.2°C and nights cool to about 22.5°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 213 mm of rain on roughly 22 days, which makes May a very wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 13 min on an average May day.
The nearest other city in this atlas is Pingxiang, China (81 km away). In May its highs average 28.4°C, 0.8°C cooler than Cao Bằng, with 203 mm of rain.
Among the 136 cities listed in Vietnam, Cao Bằng ranks 126th of 136 for the warmest May highs and joint 90th of 136 for the driest May (rainfall, lowest first). The mean May high of those 136 cities is 31.2°C; Cao Bằng is 2.0°C cooler than that mean.
From May to June, average highs rise by 1.3°C to 30.5°C, and monthly rainfall rises from 213 mm to 293 mm.
The annual picture
May in context
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, selected | 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
May in nearby cities
- Pingxiang, China in MayChina · 81 kmHigh 28.4°C · Low 21.8°C · 203 mm rain
- Lạng Sơn in MayVietnam · 104 kmHigh 29.0°C · Low 22.6°C · 220 mm rain
- Chongzuo in MayChina · 118 kmHigh 30.1°C · Low 22.8°C · 175 mm rain
- Thái Nguyên in MayVietnam · 126 kmHigh 30.4°C · Low 23.6°C · 268 mm rain
- Thị Trấn Đại Từ in MayVietnam · 131 kmHigh 31.0°C · Low 24.4°C · 260 mm rain
- Thành phố Sông Công in MayVietnam · 139 kmHigh 30.6°C · Low 23.9°C · 268 mm rain
- Baise in MayChina · 141 kmHigh 30.0°C · Low 22.0°C · 203 mm rain
- Tuyên Quang in MayVietnam · 142 kmHigh 30.9°C · Low 24.1°C · 251 mm rain
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 limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Cao Bằng) is explained once on the Cao Bằng year overview and on the Sources, method and limits page.