Chiayi City weather in July

In July, Chiayi City sees average daytime highs of 30°C and overnight lows near 24°C, with 555 mm of rain across 26.7 wet days and about 13.3 hours of daylight. It is the 1st-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 5% of the time in July, and the air most often feels oppressive.

Daylight stretches from about 13 h 24 min at the start of July to 13 h 06 min by month's end. Set against the rest of the year, July is Chiayi City's 10th-clearest and 3rd-windiest month. For the whole year in context, see Chiayi City's year-round climate.

Daytime high
30°
1st warmest
Overnight low
24°
12th coldest
Rainfall
555 mm
26.7 wet days
Daylight
13 h 18 min
5:24 AM – 6:43 PM
Cloud cover
81%
10th clearest
Wind
7 km/h
3rd windiest
Solar energy
5.22 kWh/m²
Travel score
3.0
out of 10

Temperature in July

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 30°C through the month.

A typical July day in Chiayi City reaches about 30°C in the afternoon and slips back to 24°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 31°C. Set against its neighbours, July runs on par with June and on par with August.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13023
23024
33024
43024
53024
63024
73024
83024
93024
103024
113024
123024
133024
143024
153024
163024
173024
183024
193024
203024
213024
223024
233024
243024
253024
263024
273024
283024
293024
303024
313024

How July really feels in Chiayi City

Once humidity and wind are folded in, July averages 31 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
31
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in July is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Chiayi City weather by month

How July compares with the rest of the year at a glance. July is the 1st-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan20° / 12°531010.76.6
Feb21° / 13°6211.611.26.3
Mar24° / 16°8513.311.86.4
Apr26° / 19°1441612.55.7
May28° / 21°27022.113.14.3
Jun29° / 23°36524.213.43.3
Jul30° / 24°55526.713.33.0
Aug30° / 24°66728.512.82.9
Sep29° / 23°4362412.13.6
Oct27° / 20°20718.611.45.3
Nov25° / 18°811210.96.7
Dec22° / 14°6010.710.66.8

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 5% of the time in July.

Beyond those clear spells, partly cloudy skies cover about 13% of July, with mostly cloudy or overcast conditions the remaining 82%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
11882
22080
32080
42080
52080
61981
71981
81981
91882
101882
111882
121882
131684
141684
151783
161783
171783
181783
191783
201783
211783
221783
231783
241783
251783
261783
271882
281882
291783
301783
311783

Chance of precipitation in July

Any precipitation

Chiayi City gets around 555 mm of rain over 26.7 wet days in July. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 86% and peaks near 90% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%100%151015202531
Rain chance (%)
182
282
382
482
582
683
783
884
984
1085
1185
1286
1386
1487
1587
1688
1788
1888
1988
2088
2189
2289
2389
2489
2589
2689
2789
2889
2989
3090
3190

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

Most of July feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, July lands in the oppressive band about 89% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
118910
218910
318910
409010
509010
608911
708911
808911
908911
1008911
1108911
1208911
1308911
1408911
1508911
1608911
1718811
1818811
1918811
2018910
2118910
2218910
2318910
2418910
251909
261909
271909
281909
291909
301909
311909

Wind in July

Winds average 7 km/h in July.

Across July, daily wind ranges from about 6 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in July

DaylightNight

Daylight runs from about 13 h 24 min at the start of July to 13 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 18 minutes over July. Sunrise moves from 5:19 AM to 5:31 AM, and sunset from 6:44 PM to 6:38 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.45:196:44
213.45:196:44
313.45:196:45
413.45:206:45
513.45:206:45
613.45:206:45
713.45:216:45
813.45:216:44
913.45:216:44
1013.45:226:44
1113.45:226:44
1213.45:236:44
1313.35:236:44
1413.35:236:44
1513.35:246:44
1613.35:246:43
1713.35:256:43
1813.35:256:43
1913.35:266:43
2013.35:266:42
2113.35:266:42
2213.25:276:42
2313.25:276:41
2413.25:286:41
2513.25:286:40
2613.25:296:40
2713.25:296:40
2813.25:306:39
2913.15:306:39
3013.15:306:38
3113.15:316:38

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 5.22 kWh/m².

For context, solar energy here swings from a low near 3.6 kWh/m² to a high of 5.62 kWh/m² in April across the year — July's 5.22 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.5Bright
45.5Bright
55.4Bright
65.4Bright
75.4Bright
85.4Bright
95.3Bright
105.3Bright
115.3Bright
125.3Bright
135.3Bright
145.2Bright
155.2Bright
165.2Bright
175.2Bright
185.2Bright
195.2Bright
205.2Bright
215.2Bright
225.1Bright
235.1Bright
245.1Bright
255.1Bright
265.0Bright
275.0Bright
285.0Bright
295.0Bright
304.9Bright
314.9Bright
Planning a trip in July

Hazard calendar for Chiayi City

In seasonPeak

In July, Chiayi City sits inside its pacific typhoon and monsoon season. The full year is below, with each hazard's peak months called out.

Chiayi City sits in the Pacific typhoon belt; the season peaks July–October.

Chiayi City's monsoon runs June–September, when most of the year's rain falls.

Pacific typhoon
Monsoon
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is July a good time to visit Chiayi City?

Our two travel scores rate July for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

3.0
Sightseeing
11th-best month of the year
4.1
Beach & pool
9th-best month of the year

July is a weaker month for outdoor sightseeing in Chiayi City.

What to pack for Chiayi City in July

From July's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In July, Chiayi City sees daytime highs around 30°C and nights near 24°C. Pack light clothes and rain gear. Worth having: sun protection. About 27 days see rain.

light clothesrain gearsun protection

Sea temperature near Chiayi City in July

The nearest coast averages about 29°C in July — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 35 km away) is warmest in July at about 29°C and coldest in January near 22°C.

The water stays above 20°C all year — warm enough for a swim any month.

20°25°30°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan22Refreshing
Feb22Refreshing
Mar23Refreshing
Apr25Warm
May27Warm
Jun28Tropical
Jul29Tropical
Aug29Tropical
Sep28Tropical
Oct27Warm
Nov25Warm
Dec23Refreshing

UV index in Chiayi City in July

LowModerateHighVery highExtreme

Clear-sky midday UV in July peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Chiayi City peaks around June 17 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 6 (high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highExtremeVery highHighJun 17UV 12Dec 20UV 6
UV index (midday)Level
Jan6High
Feb8Very high
Mar10Very high
Apr8Very high
May10Very high
Jun12Extreme
Jul10Extreme
Aug11Extreme
Sep9Very high
Oct7Very high
Nov7High
Dec6High

Air quality in Chiayi City in July

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where July falls, not just the annual average.

Air quality in Chiayi City is worst in March — around 40 µg/m³ PM2.5 (poor), about 1.7× the cleanest month (July, 23 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorModerateMar 1739 µg/m³Jul 1323 µg/m³
PM2.5 (µg/m³)Level
Jan36Poor
Feb36Poor
Mar40Poor
Apr36Poor
May28Moderate
Jun24Moderate
Jul23Moderate
Aug25Moderate
Sep31Moderate
Oct33Moderate
Nov34Moderate
Dec33Moderate
Location & terrain

Where is Chiayi City?

Chiayi City sits at 23.5°N, 120.4°E, 45 m above sea level, in Taiwan. The nearest listed city is Taibao, 12 km away.

XinyingDouliuCitongBudaiErlun

Topography around Chiayi City

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Chiayi City.

Within 3 km, the terrain around Chiayi City has only modest variations in elevation — a maximum elevation change of 84 m around an average of 40 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 860 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,887 m.

The land around Chiayi City is covered by artificial surfaces (65%) and trees (23%) within 3 km, trees (46%) and cropland (37%) within 16 km, and trees (47%) and water (32%) within 80 km.

3 km
84 m
16 km
860 m
80 km
3,887 m
treesgrasslandcroplandartificial surfaceswater
July weather nearby: Taibao 12 km · Xingang 14 km · Beigang 18 km · Xinying 24 km · Douliu 27 km · Citong 31 km · Budai 31 km · Erlun 33 km

Taiwan travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type A / B
110 / 220 V · 60 Hz
Happiness
6.7 / 10
World Happiness, 2025
Religion
Buddhist 35%Taoist 33%none or unspecified 18%folk religion approximately 10%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Chiayi City (23.4792°, 120.4489°, elevation 45 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).