Taiwan's Central Weather Administration said radiative cooling behind a strengthening northeast monsoon could push outlying plains toward 16-degree Celsius dawn readings late next week once rain bands ease, a sharper chill than Taipei office workers felt during October's opening showers.
Week-one versus week-two pattern
The CWA weekly bulletin issued early Saturday placed scattered showers along the north coast and east through Sunday, then flagged a stronger monsoon pulse Monday and Tuesday with cooler northern highs near 27 degrees. By Wednesday through Friday, skies trend clearer but morning radiation allows heat to escape, pulling lows into the high teens in some basins, meteorologist Wu Der-ruan wrote in his column summarized by local outlets.
Where 16 degrees is plausible
Taipei city stations may bottom near 20, but outlying townships with open farmland and less urban heat island effect can dip further. Kuan-Yu Yang's desk cautions against treating one model run as a county warning: CWA issues cold advisories only when observed trends match thresholds for consecutive hours.
Marine and mountain notes
Long-wave risks along the north coast, eastern shores, and Matsu pick up midweek per the same bulletin. Hikers should not equate cool mornings with stable afternoons—afternoon convection can still pop over southern mountains even when northern plains dry out.
Typhoon Choi-wan context
Light Typhoon Choi-wan remained far east of Taiwan and was forecast to recurve without land warnings, leaving monsoon timing—not cyclone eyewalls—as the week's main driver. Science readers should separate tropical cyclone catalogs from autumn monsoon thermodynamics.
Household preparation
Health agencies often see respiratory visits tick up on first chill weekends. Checking heater vents and damp closet mold before Tuesday's temperature step-down is cheaper than emergency clinic queues. Farmers scheduling late-season crop covers should watch CWA's 48-hour updates, not single social posts.
Energy demand
Taiwan Power Company said overnight load may dip when households skip air conditioning, but morning heater spikes can offset savings if offices pre-heat at 6 a.m. Commercial building managers were reminded to test boiler igniters before Monday.
Air quality
Clear skies after monsoon rains often improve visibility but can trap particulates if wind stalls; environmental monitors asked sensitive groups to check PM2.5 apps alongside temperature charts.