10-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Night
Rain showers
25°
Feels like 30°
Wind↑ S 6 km/h
Humidity 66 %
💧 0.2 mm
Afternoon
Mainly clear
29°
Feels like 33°
Wind↑ W 16 km/h
Humidity 42 %
11-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Night
Mainly clear
25°
Feels like 31°
Wind↑ SW 5 km/h
Humidity 66 %
Afternoon
Mainly clear
30°
Feels like 35°
Wind↑ W 15 km/h
Humidity 45 %
12-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Night
Clear sky
26°
Feels like 33°
Wind↑ WSW 3 km/h
Humidity 66 %
Afternoon
Clear sky
30°
Feels like 37°
Wind↑ W 17 km/h
Humidity 52 %
13-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Night
Mainly clear
26°
Feels like 33°
Wind↑ E 2 km/h
Humidity 64 %
Afternoon
Partly cloudy
30°
Feels like 37°
Wind↑ W 17 km/h
Humidity 55 %
Tainan forecast in charts · next 7 days
The week ahead: highs and lows
▲ This week runs +2.9° warmer than usual
Highs Lows Usual for the season (1991–2020 average)
Hourly detail
Temperature (°C) Rain (mm) Wind (km/h)
Tainan climate: what a normal year looks like
A normal year brings roughly 2,080 mm of rain — more than 89% of the towns of 20,000+ people we compared it with.
Afternoons reach 30 °C or more from May to September; the typical peak is 32 °C in July.
The wet season is concentrated from June to August, which brings 54% of the annual total; August by itself averages 408 mm.
The hottest stretch is July, when afternoons average 32 °C; the coldest is January, when nights average 16 °C.
Forecast highs for the coming week average 31 °C, 2 °C warmer than a normal October (29 °C).
30-year averages (1991–2020)
Month
Typical high
Typical low
Rainfall
Jan
22 °C
16 °C
55 mm
Feb
23 °C
17 °C
50 mm
Mar
26 °C
19 °C
66 mm
Apr
28 °C
22 °C
126 mm
May
30 °C
25 °C
306 mm
Jun
31 °C
26 °C
400 mm
Jul
32 °C
27 °C
316 mm
Aug
31 °C
26 °C
409 mm
Sep
31 °C
26 °C
190 mm
Oct
29 °C
24 °C
60 mm
Nov
27 °C
22 °C
47 mm
Dec
24 °C
18 °C
53 mm
Whole year
28 °C
22 °C
2,080 mm
Source: our own processing of the ERA5 reanalysis (Copernicus/ECMWF) for 22.99° N, 120.21° E, 1991–2020. ERA5 averages over a 0.25° grid (about 25 km): hills, a coastline or the heat of the city itself can shift local values by a degree or two.
Air you breathe in Tainan: pollution and pollen
4/6
Poor
European Air Quality Index (EAQI), from Copernicus CAMS
PM2.533µg/m³
PM1038µg/m³
Copernicus CAMS model, updated several times a day.
Rain radar around Tainan
Rain observed over the last two hours by official weather radars around Tainan, followed by the radar forecast for the next hour where the weather service provides one.
--:--
Rain radarLast two hours, then forecast where available · drag the timeline
No open weather radar covers Tainan yet: the map shows our hour-by-hour rain forecast (ICON, GFS).
Moon over Tainan
Waning gibbous
79 % illuminated · 19.3 days
Rise 17:56 Set 07:12
Sat31/1069%
Sun1/1159%
Mon2/1149%Last quarter
Tue3/1138%
Wed4/1128%
Thu5/1119%
Fri6/1112%
Sat7/116%
Sun8/112%
Mon9/110%
Tue10/111%New moon
Wed11/113%
Moonrise and moonset in local time (Asia/Taipei); phase and lit fraction from a synodic calculation.
Look up a past day in Tainan
Curious about the weather in Tainan on a given day? Choose a date: we read it from the ERA5 reanalysis (ECMWF / Copernicus C3S), which runs until about a week ago.
Tainan weather at a glance
This page gathers everything about the weather in Tainan, Taiwan: conditions now, the forecast for each part of the day and the trend for the coming week. At the moment the sky is “overcast”, it is 26 °C (feels like 34 °C) and the wind blows at 8 km/h.
Expected range today: 24 °C to 30 °C and around 1 mm of rain. The forecast comes from the AtmoAtlas engine, which combines ECMWF-AIFS, NOAA GFS and DWD ICON, adjusts cloud cover with METAR reports and uses convective energy (CAPE) to flag storms.
Use the Tainan forecast in your own website or app: one JSON call returns weather, air quality, tides and sun and moon times. The free key needs no card.
