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Best Time for Cao Bang & the Ban Gioc Falls
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Sweet spot: January, February, March. Computed from NASA POWER climate normals across the route's overnight towns, balancing temperature, rainfall and daylight.
💡 Good to know
- Ban Gioc runs full but clear after the rains — rafts nose right under the tiers on the border river — and Ba Be's lake sits mirror-still between karst walls.
- Peak flow turns the falls thunderous and chocolate-brown; dramatic, but the karst roads deserve dry-season caution.
| Month | Low | High | Rain | Daylight | |
|---|---|---|---|---|---|
| January | 8.2°C | 18.3°C | 35 mm | 10.8 h | |
| February | 10.8°C | 21.6°C | 23 mm | 11.2 h | |
| March | 14.1°C | 24.9°C | 51 mm | 11.8 h | |
| April | 17.9°C | 28.7°C | 78 mm | 12.5 h | |
| May | 21.1°C | 30.3°C | 171 mm | 13.1 h | |
| June | 23.2°C | 30.3°C | 223 mm | 13.4 h | |
| July | 23.3°C | 30.3°C | 262 mm | 13.2 h | |
| August | 23.0°C | 30.0°C | 277 mm | 12.8 h | |
| September | 21.2°C | 29.0°C | 177 mm | 12.1 h | |
| October | 17.7°C | 26.3°C | 93 mm | 11.5 h | |
| November | 13.5°C | 23.1°C | 45 mm | 10.9 h | |
| December | 8.8°C | 19.0°C | 25 mm | 10.6 h |