Chongjin weather in September

In September, Chongjin sees average daytime highs of 20°C and overnight lows near 15°C, with 121 mm of rain across 11.3 wet days and about 12.3 hours of daylight. It is the 3rd-warmest and 3rd-wettest month of the year here.

Highs ease over the month, from about 22°C in the first days to 18°C by the end. The sky is clear or mostly clear about 37% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 hours at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Chongjin's 7th-clearest and 8th-windiest month. For the whole year in context, see Chongjin's year-round climate.

Daytime high
20°
3rd warmest
Overnight low
15°
10th coldest
Rainfall
121 mm
11.3 wet days
Daylight
12 h 18 min
6:07 AM – 6:24 PM
Cloud cover
54%
7th clearest
Wind
8 km/h
8th windiest
Solar energy
4.06 kWh/m²
Travel score
6.1
out of 10

Chongjin is city in North Pyongan province, North Korea.

Density
1,216/km²
people per km²

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 22°C in the first days to 18°C by the end.

A typical September day in Chongjin reaches about 20°C in the afternoon and slips back to 15°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 23°C. Set against its neighbours, September runs about 3°C cooler than August and about 6°C warmer than October.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
12218
22218
32217
42217
52217
62217
72217
82116
92116
102116
112116
122116
132115
142115
152015
162015
172015
182014
192014
202014
211914
221914
231913
241913
251913
261913
271913
281812
291812
301812

How September really feels in Chongjin

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.

Chongjin weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-3° / -10°409.210.29.30.0
Feb-1° / -8°275.96.110.30.0
Mar / -3°357.45.911.70.1
Apr10° / 5392.113.12.2
May15° / 9612.90.214.34.0
Jun18° / 14°10613.30155.1
Jul22° / 18°19017.2014.75.3
Aug23° / 20°21518.7013.75.4
Sep20° / 15°12111.3012.36.1
Oct15° / 598.50.410.94.8
Nov / 609.15.29.61.0
Dec-0° / -7°5811.211.490.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 37% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 17% of September, with mostly cloudy or overcast conditions the remaining 46%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14159
24258
34357
44456
54555
64654
74753
84753
94951
105050
115149
125248
135248
145446
155545
165545
175644
185644
195743
205842
215941
225941
235941
246040
256139
266238
276238
286238
296436
306436

Chance of precipitation in September

Any precipitation

Chongjin gets around 121 mm of rain over 11.3 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 39% and peaks near 51% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
151
250
348
447
546
645
744
844
943
1042
1142
1242
1341
1440
1540
1639
1738
1837
1936
2036
2135
2234
2334
2433
2533
2632
2732
2832
2931
3031

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 38% of days. Sticky, muggy-or-worse air turns up on roughly 8% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
192038303
2102138283
3112338253
4132438232
5142538202
6162737182
7182837161
8202936141
9223035121
10253034101
1127313381
1229323270
1332323050
1434332840
1537332730
1639342520
1741342320
1844342110
1946341910
2048351710
2150351500
2253341300
2355341100
2457331000
255933800
266132700
276430600
286629500
296927400
307125400

Wind in September

Winds average 8 km/h in September.

Across September, daily wind ranges from about 8 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
299calm
309calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 hours at the start of September to 11 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 84 minutes over September. Sunrise moves from 5:51 AM to 6:22 AM, and sunset from 6:50 PM to 5:58 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.05:516:50
212.95:526:48
312.95:536:47
412.85:546:45
512.85:556:43
612.85:566:41
712.75:576:40
812.75:586:38
912.65:596:36
1012.66:016:34
1112.56:026:33
1212.56:036:31
1312.46:046:29
1412.46:056:27
1512.36:066:25
1612.36:076:24
1712.26:086:22
1812.26:096:20
1912.16:106:18
2012.16:116:16
2112.06:126:14
2212.06:136:13
2311.96:146:11
2411.96:166:09
2511.86:176:07
2611.86:186:05
2711.76:196:04
2811.76:206:02
2911.76:216:00
3011.66:225:58

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.06 kWh/m².

For context, solar energy here swings from a low near 1.91 kWh/m² to a high of 5.26 kWh/m² in April across the year — September's 4.06 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.0Bright
24.0Bright
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
194.0Bright
204.0Bright
214.0Bright
224.0Bright
234.0Moderate
244.0Moderate
253.9Moderate
263.9Moderate
273.9Moderate
283.9Moderate
293.9Moderate
303.8Moderate
Planning a trip in September

Hazard calendar for Chongjin

In seasonPeak

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

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

Chongjin's rainy season runs June–September, 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 Chongjin?

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

6.1
Sightseeing
1st-best month of the year
3.3
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Chongjin for sightseeing.

What to pack for Chongjin in September

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

In September, Chongjin sees daytime highs around 20°C and nights near 15°C. Worth packing: rain gear. About 11 days see rain.

rain gear

Sea temperature near Chongjin in September

The nearest coast averages about 20°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in August at about 22°C and coldest in February near 3°C.

It's comfortable for a long swim from Jul 28 to Sep 11 — about 1.5 months when the water holds above 20°C.

0°10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarm
Sea temperature (°C)Comfort
Jan4Bracing
Feb3Bracing
Mar3Bracing
Apr6Bracing
May9Bracing
Jun14Bracing
Jul19Cool
Aug22Refreshing
Sep20Cool
Oct16Cool
Nov12Bracing
Dec7Bracing

UV index in Chongjin 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 Chongjin peaks around August 19 at about 8 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 18 at about 1 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighHighVery highHighModerateLowAug 19UV 8Dec 18UV 1
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr5High
May7Very high
Jun7High
Jul5High
Aug8Very high
Sep7High
Oct4Moderate
Nov2Low
Dec1Low

Air quality in Chongjin 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 Chongjin is worst in March — around 48 µg/m³ PM2.5 (poor), about 3.1× the cleanest month (August, 16 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorModerateMar 1747 µg/m³Aug 1616 µg/m³
PM2.5 (µg/m³)Level
Jan38Poor
Feb39Poor
Mar48Poor
Apr40Poor
May31Moderate
Jun21Moderate
Jul18Moderate
Aug16Moderate
Sep18Moderate
Oct25Moderate
Nov26Moderate
Dec26Moderate
Location & terrain

Where is Chongjin?

Chongjin sits at 41.8°N, 129.8°E, 5 m above sea level, in North Korea. The nearest listed city is Ranam, 12 km away.

ŎrangHwasŏngYŏnsa-ŭpRajinMusan-ŭp

Topography around Chongjin

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

Within 3 km, the terrain around Chongjin has only modest variations in elevation — a maximum elevation change of 226 m around an average of 20 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 762 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,502 m.

The land around Chongjin is covered by artificial surfaces (56%) and cropland (22%) within 3 km, trees (37%) and water (36%) within 16 km, and trees (58%) and water (28%) within 80 km.

3 km
226 m
16 km
762 m
80 km
2,502 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Ranam 12 km · Kyŏngsŏng 27 km · Puryŏng-ŭp 30 km · Ŏrang 40 km · Hwasŏng 65 km · Yŏnsa-ŭp 65 km · Rajin 66 km · Musan-ŭp 67 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 Chongjin (41.7956°, 129.7758°, elevation 5 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).