Changyŏn weather in September

In September, Changyŏn sees average daytime highs of 23°C and overnight lows near 18°C, with 87 mm of rain across 6.2 wet days and about 12.3 hours of daylight. It is the 3rd-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 24°C in the first days to 21°C by the end. The sky is clear or mostly clear about 45% of the time in September, and the air most often feels humid.

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 Changyŏn's 4th-clearest and 10th-windiest month. For the whole year in context, see Changyŏn's year-round climate.

Daytime high
23°
3rd warmest
Overnight low
18°
10th coldest
Rainfall
87 mm
6.2 wet days
Daylight
12 h 12 min
6:27 AM – 6:41 PM
Cloud cover
49%
4th clearest
Wind
13 km/h
10th windiest
Solar energy
4.58 kWh/m²
Travel score
7.4
out of 10

Changyŏn is human settlement in North Korea.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 24°C in the first days to 21°C by the end.

A typical September day in Changyŏn reaches about 23°C in the afternoon and slips back to 18°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 24°C. Set against its neighbours, September runs about 3°C cooler than August and about 5°C warmer than October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12421
22420
32420
42420
52420
62420
72420
82420
92319
102319
112319
122319
132319
142319
152318
162318
172218
182218
192218
202218
212217
222217
232217
242117
252117
262117
272116
282116
292116
302016

How September really feels in Changyŏn

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.

Changyŏn weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -3°184.84.29.60.0
Feb / -2°203.82.310.50.0
Mar / 264.5111.70.6
Apr11° / 506.10.1133.0
May16° / 11°897.20145.3
Jun21° / 17°877.7014.66.7
Jul24° / 21°23413014.46.3
Aug25° / 22°19411.8013.56.5
Sep23° / 18°876.2012.37.4
Oct17° / 13°415.70116.3
Nov10° / 518.319.92.5
Dec / -0°317.84.69.40.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 45% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 13% of September, with mostly cloudy or overcast conditions the remaining 43%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15545
25545
35545
45644
55644
65644
75644
85545
95545
105545
115545
125545
135545
145644
155644
165644
175743
185743
195842
205941
215941
226040
236040
246040
256040
266139
276139
286238
296238
306238

Chance of precipitation in September

Any precipitation

Changyŏn gets around 87 mm of rain over 6.2 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 21% and peaks near 30% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
130
229
328
427
526
625
725
824
923
1022
1122
1221
1320
1420
1520
1619
1719
1819
1918
2018
2118
2218
2318
2418
2518
2619
2719
2819
2919
3019

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the humid band about 29% of days. Sticky, muggy-or-worse air turns up on roughly 31% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1282146221
2292346201
32102445191
43112544170
53122643150
64132842130
75142941120
86153040100
9716303890
10818313670
11919323460
121020323250
131122323050
141223332840
151424332630
161526332430
171627332220
181728332020
191829331910
202030321710
212131321510
222233321300
232433311200
242634301000
25283429900
26303428700
27333427600
28363425500
29393324400
30413322400

Wind in September

Winds average 13 km/h in September.

Across September, daily wind ranges from about 13 km/h on the calmest days to 14 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2414light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3014light breeze

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 6:13 AM to 6:39 AM, and sunset from 7:05 PM to 6:18 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.96:137:05
212.86:147:04
312.86:157:02
412.76:167:01
512.76:176:59
612.76:186:58
712.66:196:56
812.66:196:54
912.56:206:53
1012.56:216:51
1112.56:226:49
1212.46:236:48
1312.46:246:46
1412.36:256:45
1512.36:266:43
1612.26:276:41
1712.26:286:40
1812.26:286:38
1912.16:296:36
2012.16:306:35
2112.06:316:33
2212.06:326:31
2311.96:336:30
2411.96:346:28
2511.96:356:27
2611.86:366:25
2711.86:376:23
2811.76:386:22
2911.76:386:20
3011.76:396:18

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.58 kWh/m².

For context, solar energy here swings from a low near 1.99 kWh/m² to a high of 6.01 kWh/m² in May across the year — September's 4.58 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.7Bright
44.7Bright
54.7Bright
64.7Bright
74.7Bright
84.7Bright
94.7Bright
104.7Bright
114.7Bright
124.7Bright
134.7Bright
144.6Bright
154.6Bright
164.6Bright
174.6Bright
184.6Bright
194.5Bright
204.5Bright
214.5Bright
224.5Bright
234.4Bright
244.4Bright
254.4Bright
264.3Bright
274.3Bright
284.3Bright
294.3Bright
304.2Bright
Planning a trip in September

Hazard calendar for Changyŏn

In seasonPeak

In September, Changyŏn sits inside its pacific typhoon season. The full year is below, with each hazard's peak months called out.

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

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

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

Is September a good time to visit Changyŏn?

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

7.4
Sightseeing
1st-best month of the year
5.4
Beach & pool
2nd-best month of the year

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

What to pack for Changyŏn in September

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

In September, Changyŏn sees daytime highs around 23°C and nights near 18°C. Worth packing: light clothes and sun protection. About 6 days see rain.

light clothessun protection

Sea temperature near Changyŏn in September

The nearest coast averages about 21°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 24 km away) is warmest in August at about 22°C and coldest in February near 4°C.

It's comfortable for a long swim from Jul 15 to Sep 29 — about 2.5 months when the water holds above 20°C.

0°10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan6Bracing
Feb4Bracing
Mar5Bracing
Apr7Bracing
May11Bracing
Jun16Cool
Jul20Refreshing
Aug22Refreshing
Sep21Refreshing
Oct18Cool
Nov15Bracing
Dec10Bracing

UV index in Changyŏn in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Changyŏn peaks around August 13 at about 8 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 20 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateLowAug 13UV 8Dec 20UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr6High
May7High
Jun6High
Jul8Very high
Aug8Very high
Sep7High
Oct4Moderate
Nov3Moderate
Dec2Low

Air quality in Changyŏn 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 Changyŏn is worst in November — around 82 µg/m³ PM2.5 (unhealthy), about 2.1× the cleanest month (July, 40 µg/m³).

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

0306090JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorUnhealthyNov 1981 µg/m³Jul 2240 µg/m³
PM2.5 (µg/m³)Level
Jan80Unhealthy
Feb78Unhealthy
Mar80Unhealthy
Apr66Unhealthy
May54Poor
Jun46Poor
Jul40Poor
Aug41Poor
Sep58Unhealthy
Oct72Unhealthy
Nov82Unhealthy
Dec77Unhealthy
Location & terrain

Where is Changyŏn?

Changyŏn sits at 38.3°N, 125.1°E, 21 m above sea level, in North Korea. The nearest listed city is Songhwa, 13 km away.

Sinch’ŏn-ŭpOngjinAnak

Topography around Changyŏn

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

Within 3 km, the terrain around Changyŏn has only modest variations in elevation — a maximum elevation change of 128 m around an average of 36 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 581 m; within 80 km, large variations in elevation — a maximum elevation change of 1,030 m.

The land around Changyŏn is covered by cropland (65%) within 3 km, trees (48%) and cropland (41%) within 16 km, and water (52%) and cropland (27%) within 80 km.

3 km
128 m
16 km
581 m
80 km
1,030 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Songhwa 13 km · Kwail-ŭp 23 km · Samch’ŏn 23 km · T’aet’an-ŭp 25 km · Ŭllyul 30 km · Sinch’ŏn-ŭp 36 km · Ongjin 42 km · Anak 45 km

North Korea travel facts

Travel advisory
Level 4
Do Not Travel
Power plugs
Type C / F
220 V · 50 Hz
Safe drinking water
67%
of population, 2023
Road deaths
24.2
per 100k/yr, 2019
Income group
Low
World Bank

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 Changyŏn (38.2508°, 125.0961°, elevation 21 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).