A consolidated reference for Chiayi City climate: monthly averages, rebuilt from public data on a schedule. Expect 15.6 C at the coldest (Jan) and 24.9 C at the warmest (Jul) — a 9.3 C spread. Expect a wet season rather than rain year-round: Aug brings 12.91 mm/day against 1.19 mm/day in Dec. Taken together that is roughly 1,892 mm of rain a year for the grid cell. Values come from a public open API; a successful result is cached so a later outage never blanks the page. Use the table for exact numbers, or the related pages below for neighbouring locations and periods.
Annual mean temperature 21.2 C
Warmest month Jul (24.9 C)
Coldest month Jan (15.6 C)
Wettest month Aug (12.91 mm/day)
All-time record high 36.6 C
All-time record low 1.8 C
Annual precipitation 1,902 mm / year
Coordinates 23.47917, 120.44889
Population 263,188
Average monthly temperature and rainfall in Chiayi City
Month
Mean temp (C)
Rain (mm/day)
Record high (C)
Record low (C)
Jan
15.6
1.52
28.1
1.8
Feb
17.1
1.37
31.3
2.3
Mar
18.9
2.13
31.5
1.8
Apr
21.7
3.39
35.2
7.2
May
23.6
8.13
34.3
13.9
Jun
24.1
11.42
36.6
17.6
Jul
24.9
8.64
35.2
18.1
Aug
24.6
12.91
34.9
18.6
Sep
24.0
7.61
33.0
16.3
Oct
22.4
2.35
32.5
11.0
Nov
20.5
1.58
32.5
7.6
Dec
16.9
1.19
29.5
4.0
What the Chiayi City climate table shows
Values are multi-decadal climatological averages for the 23.47917, 120.44889 grid cell, not a single year. Rain is the daily mean, so a value of 2.00 mm/day is about 60 mm across a 30-day month. Averages smooth over extremes, so use them for planning rather than for what to pack for next Tuesday.
Frequently asked questions
Why do the numbers differ from a weather app?
An app shows one location on one day. These are long-run averages, so they smooth out single hot or cold spells.
How much rain is 12.91 mm/day in a month?
Rain is recorded as a daily mean, so 12.91 mm/day is roughly 392 mm across a 30-day month.