Cao Bằng Weather in September
Cao Bằng in September sees very high daytime temperatures of 30°C (86°F) and nighttime lows of 22°C (72°F). Rainfall is fairly high this month at around 166 mm (6.5 in), so pack a rain jacket to stay dry.
Rainfall in Cao Bằng in September
You can expect rain on around 13 days based on historical patterns, with 166 mm (6.5 in) average for the month. The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.
Temperature in Cao Bằng in September
Daytime temperatures in Cao Bằng reach 30°C (86°F) in September, dropping to 22°C (72°F) at night. Mornings and evenings are often more comfortable than the peak afternoon hours. Nights remain mild at 22°C (72°F), making evenings a pleasant time to be outdoors.
Sunshine in Cao Bằng in September
The city usually sees around 172 hours of sunlight, indicating a moderately sunny period.If you prefer dry days with pleasant temperatures, March, October and November typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Vietnam, check out our Cao Bằng's climate page.
Cao Bằng Temperature in September
Min Temperature
22°C (72°F)
Max Temperature
30°C (86°F)
Chance of Rain
44%
Precipitation
166 mm (6.5 in)
Rainy days
13 days
Humidity
83%
Sunshine
172 hours
Percentage Sunshine
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Cao Bằng typically stay consistent throughout September, with daily highs averaging around 30°C (86°F). Nights are warm, with lows typically ranging from 21°C (70°F) to 23°C (73°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Cao Bằng in September
Browse day-by-day weather records for Cao Bằng spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Cao Bằng historical weather extremes in September
Based on 49 years of weather observations in Cao Bằng between 1976 and 2025, these are the recorded extremes.
- On September 12, 2021, temperatures climbed to 37°C (99°F), marking the warmest September day on record.
- On September 27, 1997, Cao Bằng saw its coldest September day with temperatures maxing out at 20°C (68°F).
- The lowest overnight temperature recorded in September was 15°C (59°F) (September 30, 1998).
Best Places in Vietnam in September
Find out more about the weather in Vietnam and which places have the best travel conditions in this month. See all of Vietnam in September →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Cao Bằng in September
Warm weather calls for comfortable, breathable clothing in September. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Also bring a poncho, it will rain a lot! Waterproof everything you can. Bring sunglasses since you'll have some sunny periods throughout the monthWhat To Do in Cao Bằng in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Vietnam, check out our Cao Bằng's climate page.
Temperature Rainfall Sunshine Humidity
See the full Cao Bằng climate overview or explore weather in Vietnam.
