Hwacheon weather in September

In September, Hwacheon sees average daytime highs of 24°C and overnight lows near 15°C, with 126 mm of rain across 8.4 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 3rd-wettest month of the year here.

Highs ease over the month, from about 26°C in the first days to 22°C by the end. The sky is clear or mostly clear about 32% of the time in September, and the air most often feels dry.

Daylight stretches from about 12 h 54 min at the start of September to 11 h 42 min by month's end. Set against the rest of the year, September is Hwacheon's 9th-clearest and 11th-windiest month. For the whole year in context, see Hwacheon's year-round climate.

Daytime high
24°
4th warmest
Overnight low
15°
9th coldest
Rainfall
126 mm
8.4 wet days
Daylight
12 h 12 min
6:16 AM – 6:31 PM
Cloud cover
59%
9th clearest
Wind
6 km/h
11th windiest
Solar energy
4.08 kWh/m²
Travel score
7.0
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 26°C in the first days to 22°C by the end.

A typical September day in Hwacheon reaches about 24°C in the afternoon and slips back to 15°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 20°C and 27°C. Set against its neighbours, September runs about 4°C cooler than August and about 6°C warmer than October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12618
22618
32618
42517
52517
62517
72517
82517
92516
102516
112416
122416
132416
142415
152415
162415
172415
182314
192314
202314
212314
222314
232313
242213
252213
262213
272212
282212
292212
302112

How September really feels in Hwacheon

Once humidity and wind are folded in, September averages 0 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
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Hwacheon weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -9°224.149.70.0
Feb / -6°274.83.510.50.1
Mar10° / -1°4372.911.72.2
Apr16° / 748.30.5135.4
May22° / 10°1008.80146.8
Jun25° / 16°12310.3014.66.6
Jul27° / 20°31617.4014.45.2
Aug28° / 20°27316.2013.55.3
Sep24° / 15°1268.4012.37.0
Oct18° / 555.70116.5
Nov10° / 487.21.29.92.4
Dec / -6°265.23.79.40.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 32% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 52%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14159
24258
34357
44357
54456
64357
74456
84555
94555
104654
114654
124753
134753
144852
154852
164951
175050
185149
195149
205248
215248
225248
235347
245347
255347
265347
275347
285347
295446
305446

Chance of precipitation in September

Any precipitation

Hwacheon gets around 126 mm of rain over 8.4 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 29% and peaks near 42% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
142
241
339
438
537
636
734
833
933
1032
1131
1231
1330
1429
1529
1628
1727
1826
1926
2025
2124
2224
2324
2423
2523
2623
2722
2822
2921
3021

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 31% of days. Sticky, muggy-or-worse air turns up on roughly 13% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1417402812
2518402611
3620412410
472141228
582342217
692442196
7102541185
8122741174
9142840153
10162938143
11183037132
12203135121
13233233111
14263331101
1528342991
1631342681
1734352470
1836352260
1939361960
2042361750
2144361640
2247361440
2349351230
2451351130
2554341020
265633920
275932810
286230710
296429610
306627610

Wind in September

Winds average 6 km/h in September.

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

0246810151015202530
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 54 min at the start of September to 11 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 72 minutes over September. Sunrise moves from 6:03 AM to 6:29 AM, and sunset from 6:55 PM to 6:08 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.96:036:55
212.86:046:53
312.86:056:52
412.76:066:50
512.76:066:49
612.76:076:47
712.66:086:45
812.66:096:44
912.56:106:42
1012.56:116:41
1112.56:126:39
1212.46:136:37
1312.46:146:36
1412.36:146:34
1512.36:156:32
1612.26:166:31
1712.26:176:29
1812.26:186:27
1912.16:196:26
2012.16:206:24
2112.06:216:23
2212.06:226:21
2311.96:226:19
2411.96:236:18
2511.96:246:16
2611.86:256:14
2711.86:266:13
2811.76:276:11
2911.76:286:10
3011.76:296:08

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.08 kWh/m².

For context, solar energy here swings from a low near 2.32 kWh/m² to a high of 5.68 kWh/m² in May across the year — September's 4.08 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.1Bright
24.1Bright
34.1Bright
44.1Bright
54.1Bright
64.1Bright
74.1Bright
84.1Bright
94.1Bright
104.1Bright
114.1Bright
124.1Bright
134.1Bright
144.1Bright
154.1Bright
164.1Bright
174.1Bright
184.1Bright
194.1Bright
204.0Bright
214.0Bright
224.0Bright
234.0Bright
244.0Bright
254.0Bright
264.0Moderate
274.0Moderate
284.0Moderate
294.0Moderate
303.9Moderate
Planning a trip in September

Hazard calendar for Hwacheon

In seasonPeak

None of Hwacheon's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Hwacheon's rainy season runs July–August, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Hwacheon?

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

7.0
Sightseeing
1st-best month of the year
5.6
Beach & pool
3rd-best month of the year

September is one of the better times to visit Hwacheon for general sightseeing.

What to pack for Hwacheon in September

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

In September, Hwacheon sees daytime highs around 24°C and nights near 15°C. Worth packing: light clothes and rain gear. About 8 days see rain.

light clothesrain gear

UV index in Hwacheon in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Hwacheon peaks around August 17 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateAug 17UV 9Dec 22UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr6High
May6High
Jun7Very high
Jul7Very high
Aug9Very high
Sep8Very high
Oct5Moderate
Nov3Moderate
Dec2Low

Air quality in Hwacheon in September

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Hwacheon is worst in March — around 67 µg/m³ PM2.5 (unhealthy), about 1.8× the cleanest month (August, 37 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorPoorMar 1967 µg/m³Aug 1237 µg/m³
PM2.5 (µg/m³)Level
Jan61Unhealthy
Feb59Unhealthy
Mar67Unhealthy
Apr63Unhealthy
May53Poor
Jun46Poor
Jul38Poor
Aug37Poor
Sep40Poor
Oct52Poor
Nov56Unhealthy
Dec51Poor
Location & terrain

Where is Hwacheon?

Hwacheon sits at 38.1°N, 127.7°E, 115 m above sea level, in South Korea. The nearest listed city is Yanggu, 25 km away.

GapyeongCheorwonHongch’ŏnHwadoYangjuHoeyang

Topography around Hwacheon

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

Within 3 km, the terrain around Hwacheon has significant variations in elevation — a maximum elevation change of 494 m around an average of 210 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,108 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,646 m.

The land around Hwacheon is covered by trees (68%) within 3 km, trees (88%) within 16 km, and trees (79%) within 80 km.

3 km
494 m
16 km
1,108 m
80 km
1,646 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Yanggu 25 km · Chuncheon 26 km · Gapyeong 35 km · Cheorwon 44 km · Hongch’ŏn 49 km · Hwado 61 km · Yangju 64 km · Hoeyang 68 km

South Korea travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / F
220 V · 60 Hz
Prices
≈ 57% of US
price level, 2025
GDP per capita
$36,227
2025
Happiness
6.0 / 10
World Happiness, 2025
Safe drinking water
99%
of population, 2024
Homicide rate
0.5
per 100k, 2023
Road deaths
8.6
per 100k/yr, 2019
Income group
High
World Bank
English
Moderate
EF EPI 522
Religion
none 60%Protestant 17%Buddhist 16%Catholic 6%

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 Hwacheon (38.1071°, 127.7063°, elevation 115 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. 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).