Climate averages 1991–2020
Keelung weather
in September.
A hot, very wet month: the 4th warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Keelung: daytime highs average 28.3°C and nights cool to about 25.2°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 192 mm of rain on roughly 15 days, which makes September a very wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 19 min on an average September day.
The nearest other city in this atlas is Neihu (16 km away). In September its highs average 28.5°C, about as warm as Keelung, with 258 mm of rain.
Among the 28 cities listed in Taiwan, Keelung ranks joint 16th of 28 for the warmest September highs and 12th of 28 for the driest September (rainfall, lowest first). The mean September high of those 28 cities is 28.5°C; Keelung is 0.2°C cooler than that mean.
From September to October, average highs fall by 3.0°C to 25.2°C, and monthly rainfall rises from 192 mm to 204 mm.
The annual picture
September in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Keelung climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 18.0°C14.7°C | 14.7°C | 178 | 19.5 | 10.811 h |
| February | 18.7°C15.0°C | 15.0°C | 172 | 17.2 | 11.311 h |
| March | 20.9°C16.6°C | 16.6°C | 160 | 17.6 | 12.012 h |
| April | 23.9°C19.6°C | 19.6°C | 133 | 14.5 | 12.713 h |
| May | 26.7°C22.9°C | 22.9°C | 163 | 14.2 | 13.413 h |
| June | 29.2°C25.4°C | 25.4°C | 141 | 13.2 | 13.714 h |
| July | 30.5°C26.7°C | 26.7°C | 103 | 9.2 | 13.514 h |
| August | 30.1°C26.6°C | 26.6°C | 171 | 12.7 | 13.013 h |
| September, selected | 28.3°C25.2°C | 25.2°C | 192 | 15.2 | 12.312 h |
| October | 25.2°C22.8°C | 22.8°C | 204 | 15.5 | 11.612 h |
| November | 22.8°C20.1°C | 20.1°C | 195 | 17.6 | 10.911 h |
| December | 19.5°C16.5°C | 16.5°C | 186 | 18.9 | 10.611 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
September in nearby cities
- Neihu in SeptemberTaiwan · 16 kmHigh 28.5°C · Low 24.8°C · 258 mm rain
- Taipei in SeptemberTaiwan · 23 kmHigh 28.6°C · Low 24.5°C · 258 mm rain
- Danshui, Taiwan in SeptemberTaiwan · 30 kmHigh 28.7°C · Low 25.2°C · 169 mm rain
- Banqiao in SeptemberTaiwan · 30 kmHigh 28.5°C · Low 23.5°C · 258 mm rain
- Shulin in SeptemberTaiwan · 36 kmHigh 28.4°C · Low 23.5°C · 258 mm rain
- Yilan, Taiwan in SeptemberTaiwan · 42 kmHigh 27.8°C · Low 23.7°C · 336 mm rain
- Sanxia in SeptemberTaiwan · 43 kmHigh 29.2°C · Low 23.6°C · 180 mm rain
- Taoyuan in SeptemberTaiwan · 47 kmHigh 27.9°C · Low 23.4°C · 180 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Keelung) is explained once on the Keelung year overview and on the Sources, method and limits page.