Xiyu Weather in September
September in Xiyu sees daytime temperatures around 29°C (84°F) and lows of 27°C (81°F) at night. With around 121 mm (4.8 in) of rainfall expected, it's worth packing a rain jacket.
Rainfall in Xiyu in September
Expect around 12 days of rain based on historical data, with 121 mm (4.8 in) average. When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.
Temperature in Xiyu in September
Xiyu in September gets highs of 29°C (84°F) during the day and drops to 27°C (81°F) at night. The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. Nights are warm at 27°C (81°F), which can make sleeping uncomfortable. Keeping windows open or using a fan can help. A cold shower before bed is also a good way to cool down.
Sunshine in Xiyu in September
Expect sunny days throughout the month, with an estimated 223 hours of sunshine. This makes it a pleasant time to visit Xiyu.If you prefer enjoying temperate temperatures and rain-free days, January, February, March, October, November and December 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 Taiwan, check out our Xiyu's climate page.
Xiyu Temperature in September
Min Temperature
27°C (81°F)
Max Temperature
29°C (84°F)
Chance of Rain
41%
Precipitation
121 mm (4.8 in)
Rainy days
12 days
Humidity
81% *
Sunshine
223 hours *
Percentage Sunshine
*
Daily Historical Temperatures
43-year average (1976-2025)
Based on our historical records, temperatures in Xiyu typically stay consistent throughout September, with daily highs averaging around 29°C (84°F). Nights are warm, with lows around 26°C (79°F).
Average temperatures in September
Historical weather for Xiyu in September
Browse day-by-day weather records for Xiyu spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Xiyu historical weather extremes in September
Based on 19 years of weather observations in Xiyu between 2006 and 2025, these are the recorded extremes.
- The hottest September day on record in Xiyu reached 32°C (90°F) (September 29, 2025).
- Xiyu experienced its chilliest September day on September 30, 2012, reaching only 25°C (77°F).
- The coldest night in September in Xiyu was on September 21, 2006, with a minimum of 24°C (75°F).
Best Places in Taiwan in September
Find out more about the weather in Taiwan and which places have the best travel conditions in this month. See all of Taiwan in September →
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What to Wear in Xiyu 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). High rain levels are expected, so pack waterproof gear and an umbrella or poncho. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.What To Do in Xiyu 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 Taiwan, check out our Xiyu's climate page.
Temperature Rainfall Sunshine Humidity
See the full Xiyu climate overview or explore weather in Taiwan.
