Climate averages 1991–2020
Caotun weather
in May.
A warm, wet month: the 5th warmest and the 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a warm month in Caotun: daytime highs average 27.4°C and nights cool to about 20.7°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 165 mm of rain on roughly 17 days, which makes May a wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 17 min on an average May day.
The nearest other city in this atlas is Nantou, Taiwan (7 km away). In May its highs average 26.6°C, 0.9°C cooler than Caotun, with 165 mm of rain.
Among the 28 cities listed in Taiwan, Caotun ranks 13th of 28 for the warmest May highs and joint 9th of 28 for the driest May (rainfall, lowest first). The mean May high of those 28 cities is 27.5°C; Caotun is 0.1°C cooler than that mean.
From May to June, average highs rise by 1.1°C to 28.5°C, and monthly rainfall rises from 165 mm to 215 mm.
The annual picture
May 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
Caotun climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 19.9°C12.3°C | 12.3°C | 59 | 9.8 | 10.811 h |
| February | 20.8°C13.2°C | 13.2°C | 75 | 10.7 | 11.311 h |
| March | 22.9°C15.4°C | 15.4°C | 99 | 12.4 | 12.012 h |
| April | 25.4°C18.3°C | 18.3°C | 115 | 13.5 | 12.713 h |
| May, selected | 27.4°C20.7°C | 20.7°C | 165 | 17.3 | 13.313 h |
| June | 28.5°C22.0°C | 22.0°C | 215 | 19.7 | 13.614 h |
| July | 29.1°C22.8°C | 22.8°C | 309 | 22.4 | 13.513 h |
| August | 28.5°C22.8°C | 22.8°C | 384 | 25.8 | 13.013 h |
| September | 28.2°C22.2°C | 22.2°C | 230 | 21.3 | 12.312 h |
| October | 26.9°C20.2°C | 20.2°C | 92 | 11.1 | 11.612 h |
| November | 24.9°C17.5°C | 17.5°C | 46 | 7.1 | 11.011 h |
| December | 21.4°C14.1°C | 14.1°C | 56 | 8.3 | 10.711 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
May in nearby cities
- Nantou, Taiwan in MayTaiwan · 7 kmHigh 26.6°C · Low 19.8°C · 165 mm rain
- Yuanlin in MayTaiwan · 12 kmHigh 28.2°C · Low 21.5°C · 228 mm rain
- Chang-hua in MayTaiwan · 17 kmHigh 28.1°C · Low 22.0°C · 228 mm rain
- Taichung in MayTaiwan · 19 kmHigh 27.5°C · Low 21.2°C · 222 mm rain
- Puli in MayTaiwan · 29 kmHigh 27.6°C · Low 21.0°C · 179 mm rain
- Douliu in MayTaiwan · 33 kmHigh 28.0°C · Low 20.9°C · 245 mm rain
- Chiayi City in MayTaiwan · 60 kmHigh 28.0°C · Low 21.1°C · 270 mm rain
- Miaoli in MayTaiwan · 67 kmHigh 26.8°C · Low 22.4°C · 211 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 Caotun) is explained once on the Caotun year overview and on the Sources, method and limits page.
Nantou, Taiwan lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.