Taipei weather by month — averages, rainfall & climate trends
Tucked in a basin at the northern tip of Taiwan, Taipei lives a life of extremes — heat and humidity pooled by its valley setting, winter fog rolling in from the northeast monsoon, and Pacific typhoons arriving from June through October. Average temperatures and rainfall by month, a climate graph, today's conditions versus the long-term average, and how the climate has shifted since 1940 — all on one page for Taipei, Taiwan.
Today vs average
+1.2°Cabout average
How it’s changed
Right now
What it's doing today vs the historical average for this date.
Right now
26.5°
34°26°34°26°
33°26°
32°26°34°26°36°25°
35°26°On this date — July 19
About average
- Record high: 37.1° · 1998
- Record low: 23.3° · 1943
- One year ago: 29.8°
Every July 19 in history — coldest to hottest
Dots show daily highs (top) and lows (bottom) for each July 19 on record (n = 87). Outlined dots are today's forecast.
Area we sample
Each city's history comes from one ERA5 grid cell — about 28 km across, shown by the dashed box. Near mountains or coasts, conditions can vary across the cell.
Location & data
Historical weather for Taipei is sampled from the ECMWF ERA5 reanalysis at 25.05°N, 121.53°E, with daily records since 1940.
- Coordinates
- 25.05°N, 121.53°E
- Time zone
- Asia/Taipei
- Period
- 1940–2026
- Data source
- ERA5 (ECMWF)
Last 30 days
21 of the last 31 days were warmer than the historical average for that date. Average difference: +0.6°C.
Each bar is one day, from morning low to afternoon high. Warm-colored bars are days whose mean ran above average; cool bars ran below. The dot inside the bar is the daily mean. The shaded band is the typical 10–90% range expected for that date. Average = the day's mean temperature averaged across every year of record (1940–2026) for that calendar date.
This date over the years
One dot per year — the mean temperature on this calendar date. Dots are warmer or cooler than the long-term average (dashed line); the shaded band is the typical 10–90% range, and the highlighted dot is today's forecast. Based on ERA5 reanalysis — modelled estimates, not station readings.
Weather by month
Average temperatures and rainfall for each month — what a typical year looks like, from the full record.Climate overview
Taipei lies in the Taipei Basin at the northern tip of Taiwan, with a humid subtropical climate (Köppen Cfa) shaped decisively by its valley topography. In winter, cool moist air from the northeast monsoon pools in the basin, bringing persistent cloud cover, drizzle and fog; in summer, the same geometry traps heat and humidity, making the city hotter than coastal locations at the same latitude. Typhoon season runs from June to October, and Taipei's Pacific exposure puts it regularly in the path of storms tracking westward.
The northeast monsoon dominates the cooler half of the year, while the hot and humid summer peaks before typhoons begin to arrive in earnest in late August and September. On 24 July 2020 Taipei approached 40°C for the first time on record — a threshold almost never reached in a basin city whose valley setting was expected to moderate the most extreme heat. The surrounding Yangmingshan hills receive occasional frost and snow in cold winters, while the city floor almost never does.
July brings the year's peak warmth: daily means of 29.3°C, with afternoons typically reaching 33.0°C. Around 220 nights a year stay above 20°C. In January, daily means drop to roughly 15.6°C, with nights dipping to 13.2°C.
Taipei picks up roughly 2080 mm a year, with a peak of 273 mm in August and as little as 92 mm in January. A typical year brings rain or snow on around 220 days.
Over the full record (since 1940), the annual mean temperature in Taipei has risen by 2.2°C between its first decade and its last. Days above 30°C have grown noticeably more frequent — from around 85 a year in the first decade to about 145 in the last.
Climate graph (climograph)
July is the warmest month, January the coolest — a yearly swing of 14°C. Wettest month: August (~273 mm). Whole year averages ~2080 mm of rain.
Bars = average monthly rainfall (right axis). Lines = average daily high and low (left axis). Average = each month's value averaged across every year of record (1940–2026).
Monthly wind
Average daily peak wind at 10 m, by month.
Monthly solar energy
Average daily incoming solar energy in megajoules per square metre — a measured proxy for how sunny the month is.
Taipei month by month — what to expect
Typical conditions for each month, averaged across the full record (since 1940). Daylight is the time from sunrise to sunset. Record high/low are the most extreme values in the ERA5 dataset (modelled since 1940), so they can differ from official weather-station readings.
| Month | Avg high | Avg low | Rain | Daylight | Record high | Record low |
|---|---|---|---|---|---|---|
| January | 18.5° | 13.2° | 92 mm | 10.6 h | 28.7° (1972) | 2.9° (2016) |
| February | 19.3° | 13.8° | 99 mm | 11.2 h | 31.9° (1979) | 3.5° (1958) |
| March | 22.2° | 15.8° | 99 mm | 11.8 h | 33.0° (2020) | 3.0° (1972) |
| April | 25.8° | 19.2° | 118 mm | 12.6 h | 35.0° (2017) | 8.3° (1969) |
| May | 28.8° | 22.6° | 200 mm | 13.2 h | 37.3° (2021) | 12.1° (1971) |
| June | 31.3° | 25.0° | 252 mm | 13.5 h | 37.6° (2002) | 17.2° (1979) |
| July | 33.0° | 26.2° | 222 mm | 13.4 h | 38.3° (2020) | 22.3° (1951) |
| August | 32.5° | 26.0° | 273 mm | 12.9 h | 38.0° (2019) | 20.6° (1974) |
| September | 30.7° | 24.6° | 251 mm | 12.1 h | 37.2° (2024) | 16.6° (1966) |
| October | 26.9° | 21.8° | 221 mm | 11.4 h | 36.8° (2025) | 11.5° (1968) |
| November | 23.7° | 18.9° | 148 mm | 10.8 h | 33.1° (2008) | 8.8° (1988) |
| December | 20.1° | 15.2° | 106 mm | 10.4 h | 30.5° (2016) | 3.7° (1985) |
How it has changed
Year-by-year signals from 1940 to today.Climate stripes
Annual mean shifted from 1940–1949 to 2016–2025 by +2.2°C.
Each vertical stripe is one year. Color encodes how much that year's annual mean differed from the long-term average. Average = each year's annual mean compared to the average of all years (1940–2026). cooler ← → warmer
Annual mean temperature
Long-term trend: +0.25°C per decade.
One point per year — the temperature averaged across the whole year. The dashed line is the least-squares long-term trend. Based on ERA5 reanalysis — modelled estimates, not station readings.
Seasonal warming
Jun–Aug is warming fastest: +0.29°C per decade.
Each faint line is one three-month period's average per year; the bold dashed line is its long-term trend. Different parts of the year often warm at different rates. Based on ERA5 reanalysis — modelled estimates, not station readings.
Hot days vs frost days
Days ≥ 30°C per year: 86.8 early in the record → 147.4 recently. Frost days: 0 → 0.
Thin lines are raw yearly counts; thick lines are the smoothed trend that removes year-to-year noise. The hot-day threshold is auto-picked per city so the line actually moves. Average = a centered 5-year rolling average to smooth weather noise.
Yearly hot & cold extremes
All-time high in 2020, all-time low in 2016: 38.3°C / 2.9°C.
One point per year — the single hottest and coldest day recorded that year.
Annual rainfall
~2080 mm/year on average. Last decade ran +3% vs that average. Long-term trend: +64 mm per decade.
One bar per year of total rainfall. Dashed line is the long-term average. Average = the average annual rainfall across every year of record (1940–2026).
Day-by-day grid
Each tiny square is one calendar day across the full record — ~30,000 days per city. Use the mode switch above the chart: Anomaly colors each day by how far it ran from the historical average for that date (red = warmer, blue = cooler), Daily mean temp shows the absolute mean temperature for the day (useful to see seasons and heatwaves), and Precipitation shows daily rainfall (useful to spot wet/dry seasons and droughts). Average = the long-term average for that calendar date (1940–2026).