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Weather in Tainan - 14-day forecast

Detailed weather forecast for Tainan, Taiwan: daytime and night temperature, rain, sunrise and sunset - today and for the next two weeks.
Forecast for the next days in Tainan
today🌧️ 30°💧 7.5 mm
Sun🌧️ 33°💧 0.1 mm
Mon🌧️ 32°💧 0.7 mm
Tue☀️ 32°💧 0.3 mm
Wed🌧️ 32°💧 0.1 mm
Thu☁️ 31°💧 4 mm
Fri☁️ 32°💧 0.2 mm
Sat🌧️ 33°💧 0.1 mm
Forecast vs 1991-2020 climate normal

How does the current forecast compare with normal?

We compare the coming days with weather usually observed at this time of year.

NASA POWER

Sunday 6 Sept in Tainan, the forecast high is 33°C. Typical daytime temperatures at this time of year range from 29°C to 30°C, so it will be exceptionally warm. It is warmer than 99% of similar days.

30°Cwarmer than usual
usually 29°C–30°C
warmer than 89% of similar days
night: warmer than usual rain: typical rainfall wind: typical
33°Cexceptionally warm
usually 29°C–30°C
warmer than 99% of similar days
night: warmer than usual rain: less rain than usual wind: exceptionally strong
32°Cexceptionally warm
usually 29°C–30°C
warmer than 99% of similar days
night: exceptionally warm rain: less rain than usual wind: stronger than usual
32°Cexceptionally warm
usually 29°C–30°C
warmer than 99% of similar days
night: exceptionally warm rain: less rain than usual wind: stronger than usual
32°Cexceptionally warm
usually 29°C–30°C
warmer than 99% of similar days
night: warmer than usual rain: less rain than usual wind: typical
31°Cexceptionally warm
usually 29°C–30°C
warmer than 96% of similar days
night: exceptionally warm rain: typical rainfall wind: typical
32°Cexceptionally warm
usually 29°C–30°C
warmer than 99% of similar days
night: exceptionally warm rain: less rain than usual wind: typical

How warm was this week in previous years?

Each bar shows the average daily high during the same 7-day period in each year.

swipe to see more years →
25°30°35° 1981: 28°C1982: 29°C1983: 30°C1984: 29°C1985: 29°C1986: 29°C1987: 28°C1988: 29°C1989: 29°C1990: 28°C1991: 29°C1992: 28°C1993: 30°C1994: 29°C1995: 30°C1996: 30°C1997: 28°C1998: 29°C1999: 29°C2000: 28°C2001: 29°C2002: 29°C2003: 30°C2004: 29°C2005: 29°C2006: 29°C2007: 29°C2008: 29°C2009: 31°C2010: 29°C2011: 29°C2012: 29°C2013: 29°C2014: 30°C2015: 29°C2016: 29°C2017: 30°C2018: 29°C2019: 29°C2020: 30°C2021: 30°C2022: 31°C2023: 29°C2024: 31°C2025: 30°C 2026 forecast: 32°C current forecast 32°C 198119902000201020202026
cooler yearstypical rangewarmer years2026 forecastcurrent forecast

From 1981 to 2025, the 5-11 Sept period averaged 29°C by day. The coolest year was 1990 (28°C) and the warmest was 2024 (31°C). The current forecast averages 32°C - higher than in 100% of historical years.

Historical reference: NASA POWER daily gridded data (MERRA-2), the 1991-2020 normal and a +/- 7-day calendar window. The typical range is the 20th-80th percentile. This is not a city weather-station reading and does not change the current forecast. NASA POWER Daily API.

14-day forecast - Tainan

Tainan - 14-day weather forecast infographic

Day-by-day forecast for Tainan

Saturday5 September 2026
🌧️30°moderate rain
sunrise 05:42 · sunset 18:13 · night 28° · evening 31° · rain 7.52 mm · humidity 69% · wind 4 m/s · clouds 100%
Sunday6 September 2026
🌧️33°light rain
sunrise 05:42 · sunset 18:12 · night 28° · evening 31° · rain 0.14 mm · humidity 46% · wind 10 m/s · clouds 18%
Monday7 September 2026
🌧️32°light rain
sunrise 05:43 · sunset 18:11 · night 29° · evening 32° · rain 0.65 mm · humidity 52% · wind 8 m/s · clouds 9%
Tuesday8 September 2026
☀️32°clear sky
sunrise 05:43 · sunset 18:10 · night 28° · evening 31° · rain 0.3 mm · humidity 49% · wind 7 m/s · clouds 5%
Wednesday9 September 2026
🌧️32°light rain
sunrise 05:43 · sunset 18:09 · night 28° · evening 32° · rain 0.12 mm · humidity 48% · wind 5 m/s · clouds 12%
Thursday10 September 2026
☁️31°overcast clouds
sunrise 05:44 · sunset 18:08 · night 28° · evening 30° · rain 3.99 mm · humidity 53% · wind 6 m/s · clouds 97%
Friday11 September 2026
☁️32°broken clouds
sunrise 05:44 · sunset 18:07 · night 30° · evening 33° · rain 0.15 mm · humidity 51% · wind 5 m/s · clouds 57%
Saturday12 September 2026
🌧️33°light rain
sunrise 05:44 · sunset 18:06 · night 29° · evening 32° · rain 0.12 mm · humidity 50% · wind 5 m/s · clouds 66%
Sunday13 September 2026
🌧️33°light rain
sunrise 05:45 · sunset 18:05 · night 30° · evening 32° · rain 1.47 mm · humidity 55% · wind 5 m/s · clouds 77%
Monday14 September 2026
🌧️34°moderate rain
sunrise 05:45 · sunset 18:04 · night 29° · evening 31° · rain 5.97 mm · humidity 51% · wind 5 m/s · clouds 42%
Tuesday15 September 2026
🌧️32°light rain
sunrise 05:45 · sunset 18:03 · night 28° · evening 30° · rain 3.78 mm · humidity 59% · wind 3 m/s · clouds 71%
Wednesday16 September 2026
🌧️33°light rain
sunrise 05:46 · sunset 18:02 · night 29° · evening 29° · rain 2.94 mm · humidity 53% · wind 4 m/s · clouds 71%
Thursday17 September 2026
🌧️32°light rain
sunrise 05:46 · sunset 18:01 · night 30° · evening 31° · rain 0.24 mm · humidity 55% · wind 6 m/s · clouds 1%
Friday18 September 2026
🌧️33°light rain
sunrise 05:46 · sunset 18:00 · night 29° · evening 32° · rain 2.79 mm · humidity 53% · wind 5 m/s · clouds 73%
Saturday19 September 2026
🌧️33°light rain
sunrise 05:46 · sunset 17:59 · night 29° · evening 32° · rain 1.47 mm · humidity 53% · wind 5 m/s · clouds 100%
Sunday20 September 2026
🌧️33°light rain
sunrise 05:47 · sunset 17:58 · night 29° · evening 31° · rain 1.35 mm · humidity 53% · wind 4 m/s · clouds 52%

UV index in Tainan - is it safe to sunbathe?

UV INDEX · 16-DAY FORECASTTainan03681111+7.5UV HIGHtoday, daily maxSPF 30-50, a hat and sunglasses are a must. Betterstay in shade between 11:00 and 15:00.Unprotected fair skin may burn in about 25 min8Sat5.099Sun6.099Mon7.098Tue8.099Wed9.097Thu10.098Fri11.099Sat12.092Sun13.099Mon14.096Tue15.099Wed16.098Thu17.099Fri18.099Sat19.097Sun20.090-2 low3-5 moderate6-7 high8-10 very high11+ extremeworld-prices.com · 2026-09-05
Today the UV index in Tainan is 8 (high) - unprotected fair skin can burn in about 25 minutes. SPF 30-50, a hat and sunglasses are a must. Better stay in shade between 11:00 and 15:00.

Sea temperature - Tainan

Water today
29°C
Week avg
30°C
Waves today
0.7 m
How's the water?
very warm
16-day sea temperature forecast:
5.09 29°C6.09 29°C7.09 29°C8.09 30°C9.09 30°C10.09 30°C11.09 30°C12.09 30°C13.09 31°C
Average sea temperature through the year:
Jan 22°CFeb 22°CMar 24°CApr 27°CMay 29°CJun 31°CJul 31°CAug 31°CSep 31°COct 29°CNov 27°CDec 24°C
Sea-surface temperature from marine models, updated daily. See also: where the sea is warmest right now.

Air quality and smog in Tainan

Air quality in Tainan is currently good. Fine particulate PM2.5: 20 µg/m³, PM10: 24.7 µg/m³.
CityPM2.5 (µg/m³)PM10 (µg/m³)Air quality
Tainan2024.7good
Based on PM2.5 thresholds. Station readings, updated daily (last reading: 2026-09-05, 09:00).

Nearby and related places

KaohsiungDouliuTaitungTaichungHengchunTaipeiKeelungTaoyuan

FAQ - Tainan weather

What is the weather like in Tainan today?
Today it is about 30° during the day and 28° at night, moderate rain.
How far ahead can I check the forecast for Tainan?
This page shows a detailed 14-day forecast plus the long-term monthly climate, so you can plan both a short trip and a holiday months ahead.