Cau Ha Weather in September
September in Cau Ha typically sees daytime highs of 32°C (90°F) and nighttime lows of 26°C (79°F). September falls within the rainy season, so heavy rainfall is to be expected.
Rainfall in Cau Ha in September
Cau Ha is in the rainy season in September, with rain on around 18 days and an average of 310 mm (12 in). With high rainfall totals spread across the month, individual showers can be very heavy. Waterproof gear is strongly recommended.
Temperature in Cau Ha in September
Daytime temperatures in Cau Ha reach 32°C (90°F) in September, dropping to 26°C (79°F) at night. For most visitors, the main thing to prepare for is the heat during the day. With lows of 26°C (79°F), it stays warm throughout the night. A cold shower before going to sleep is one of the easiest ways to cool down before bed.
Sunshine in Cau Ha in September
The month brings about 180 hours of sunlight, offering a comfortable mix of sun and rainy moments.September in Cau Ha has its charm, but if you're looking for destinations with pleasant temperatures and sunny skies, our weather planner can help you explore other options in the world.
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 Cau Ha's climate page.
Cau Ha Temperature in September
Min Temperature
26°C (79°F)
Max Temperature
32°C (90°F)
Chance of Rain
61%
Precipitation
310 mm (12 in)
Rainy days
18 days
Humidity
82% *
Sunshine
180 hours *
Percentage Sunshine
*
Daily Historical Temperatures
48-year average (1976-2025)
Based on our historical records, temperatures in Cau Ha typically stay consistent throughout September, with daily highs averaging around 32°C (90°F). Nights are warm, with lows around 25°C (77°F).
Average temperatures in September
Daily Historical Precipitation
48-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 Cau Ha in September
Browse day-by-day weather records for Cau Ha spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Cau Ha historical weather extremes in September
Based on 32 years of weather observations in Cau Ha between 1993 and 2025, these are the recorded extremes.
- On September 8, 2024, temperatures climbed to 38°C (100°F), marking the warmest September day on record.
- On September 26, 2011, Cau Ha saw its coldest September day with temperatures maxing out at 24°C (75°F).
- The lowest overnight temperature recorded in September was 20°C (68°F) (September 15, 2000).
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
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tolerable
unpleasant
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What to Wear in Cau Ha 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. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.What To Do in Cau Ha 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 Cau Ha's climate page.
Temperature Rainfall Sunshine Humidity
See the full Cau Ha climate overview or explore weather in Vietnam.
