T’ongch’ŏn-ŭp weather in September

In September, T’ongch’ŏn-ŭp sees average daytime highs of 21°C and overnight lows near 19°C, with 144 mm of rain across 9.3 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 23°C in the first days to 20°C by the end. The sky is clear or mostly clear about 40% 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 36 min by month's end. Set against the rest of the year, September is T’ongch’ŏn-ŭp's 9th-clearest and 9th-windiest month. For the whole year in context, see T’ongch’ŏn-ŭp's year-round climate.

Daytime high
21°
3rd warmest
Overnight low
19°
10th coldest
Rainfall
144 mm
9.3 wet days
Daylight
12 h 12 min
6:15 AM – 6:30 PM
Cloud cover
54%
9th clearest
Wind
13 km/h
9th windiest
Solar energy
4.17 kWh/m²
Travel score
6.7
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 23°C in the first days to 20°C by the end.

A typical September day in T’ongch’ŏn-ŭp reaches about 21°C in the afternoon and slips back to 19°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 19°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)
12321
22321
32321
42321
52320
62320
72220
82220
92220
102220
112220
122220
132219
142119
152119
162119
172119
182119
192118
202118
212118
222018
232018
242018
252018
262017
272017
282017
291917
301917

How September really feels in T’ongch’ŏn-ŭp

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.

T’ongch’ŏn-ŭp 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 / -2°415.84.99.60.0
Feb / -1°3453.910.50.0
Mar / 446.62.911.70.8
Apr11° / 656.80.3133.2
May16° / 12°998014.15.4
Jun20° / 17°959.1014.76.4
Jul24° / 21°22313.1014.56.2
Aug25° / 22°22213.8013.56.3
Sep21° / 19°1449.3012.36.7
Oct17° / 14°747.20115.9
Nov10° / 807.90.59.92.7
Dec / 445.62.79.30.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 40% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 11% of September, with mostly cloudy or overcast conditions the remaining 48%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14951
24951
34951
44951
54951
64951
74951
84852
94951
104951
114951
125050
134951
144951
155050
165149
175248
185248
195248
205347
215446
225446
235545
245545
255545
265644
275644
285743
295743
305842

Chance of precipitation in September

Any precipitation

T’ongch’ŏn-ŭp gets around 144 mm of rain over 9.3 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 31% and peaks near 38% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
138
237
336
436
535
634
734
834
933
1033
1133
1232
1332
1432
1532
1631
1731
1830
1930
2030
2129
2229
2328
2428
2528
2628
2727
2827
2927
3027

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 32% of days. Sticky, muggy-or-worse air turns up on roughly 25% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1110314117
2111324016
3212333914
4213343813
5215353711
6216363610
731736358
831937347
942137336
1052237315
1162437294
1272537283
1392637263
14102836242
15122936212
16133036191
17153135181
18173235161
19183334141
20203433120
21223533110
2224353290
2326363080
2428362970
2530372860
2632372650
2735372440
2837372330
2939372120
3041372020

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
1914light breeze
2014light breeze
2114light breeze
2214light breeze
2314light 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 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 78 minutes over September. Sunrise moves from 6:01 AM to 6:28 AM, and sunset from 6:55 PM to 6:07 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.96:016:55
212.86:026:53
312.86:036:52
412.86:046:50
512.76:056:48
612.76:066:47
712.66:076:45
812.66:086:44
912.66:096:42
1012.56:106:40
1112.56:116:39
1212.46:126:37
1312.46:126:35
1412.36:136:34
1512.36:146:32
1612.26:156:30
1712.26:166:29
1812.26:176:27
1912.16:186:25
2012.16:196:24
2112.06:206:22
2212.06:216:20
2311.96:226:19
2411.96:236:17
2511.96:246:15
2611.86:256:14
2711.86:266:12
2811.76:276:10
2911.76:286:09
3011.66:286:07

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.17 kWh/m².

For context, solar energy here swings from a low near 2.23 kWh/m² to a high of 5.87 kWh/m² in May across the year — September's 4.17 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.3Bright
24.3Bright
34.3Bright
44.3Bright
54.3Bright
64.3Bright
74.3Bright
84.3Bright
94.2Bright
104.2Bright
114.2Bright
124.2Bright
134.2Bright
144.2Bright
154.2Bright
164.1Bright
174.1Bright
184.1Bright
194.1Bright
204.1Bright
214.1Bright
224.1Bright
234.1Bright
244.0Bright
254.0Bright
264.0Bright
274.0Moderate
284.0Moderate
294.0Moderate
303.9Moderate
Planning a trip in September

Hazard calendar for T’ongch’ŏn-ŭp

In seasonPeak

In September, T’ongch’ŏn-ŭp sits inside its pacific typhoon and rainy season season. The full year is below, with each hazard's peak months called out.

T’ongch’ŏn-ŭp sits in the Pacific typhoon belt; the season peaks July–October.

T’ongch’ŏn-ŭp's rainy season runs July–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 T’ongch’ŏn-ŭp?

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

6.7
Sightseeing
1st-best month of the year
4.2
Beach & pool
3rd-best month of the year

September is a reasonable time to visit T’ongch’ŏn-ŭp for sightseeing.

What to pack for T’ongch’ŏn-ŭp in September

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

In September, T’ongch’ŏn-ŭp sees daytime highs around 21°C and nights near 19°C. Worth packing: rain gear. About 9 days see rain.

rain gear

Sea temperature near T’ongch’ŏn-ŭp in September

The nearest coast averages about 22°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 19 km away) is warmest in August at about 24°C and coldest in February near 4°C.

It's comfortable for a long swim from Jul 2 to Sep 30 — about 3 months when the water holds above 20°C.

0°10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan6Bracing
Feb4Bracing
Mar5Bracing
Apr9Bracing
May13Bracing
Jun18Cool
Jul22Refreshing
Aug24Warm
Sep22Refreshing
Oct18Cool
Nov13Bracing
Dec9Bracing

UV index in T’ongch’ŏn-ŭp 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 T’ongch’ŏn-ŭp peaks around August 17 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 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 highVery highHighModerateLowAug 17UV 9Dec 19UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr6High
May6High
Jun7Very high
Jul7High
Aug9Very high
Sep7Very high
Oct5Moderate
Nov2Moderate
Dec2Low

Air quality in T’ongch’ŏn-ŭp 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 T’ongch’ŏn-ŭp is worst in March — around 44 µg/m³ PM2.5 (poor), about 2.9× the cleanest month (September, 15 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateMar 1944 µg/m³Sep 1016 µg/m³
PM2.5 (µg/m³)Level
Jan33Moderate
Feb36Poor
Mar44Poor
Apr40Poor
May32Moderate
Jun22Moderate
Jul18Moderate
Aug16Moderate
Sep15Moderate
Oct22Moderate
Nov27Moderate
Dec27Moderate
Location & terrain

Where is T’ongch’ŏn-ŭp?

T’ongch’ŏn-ŭp sits at 39.0°N, 127.9°E, 6 m above sea level, in North Korea. The nearest listed city is Anbyŏn-ŭp, 33 km away.

HoeyangKosanWŏnsanKowŏn-ŭpKosongYangguHwacheon

Topography around T’ongch’ŏn-ŭp

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of T’ongch’ŏn-ŭp.

Within 3 km, the terrain around T’ongch’ŏn-ŭp has only modest variations in elevation — a maximum elevation change of 168 m around an average of 12 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,075 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,642 m.

The land around T’ongch’ŏn-ŭp is covered by water (41%) and cropland (37%) within 3 km, water (48%) and trees (32%) within 16 km, and trees (48%) and water (35%) within 80 km.

3 km
168 m
16 km
1,075 m
80 km
1,642 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Anbyŏn-ŭp 33 km · Hoeyang 37 km · Kosan 42 km · Wŏnsan 45 km · Kowŏn-ŭp 78 km · Kosong 81 km · Yanggu 95 km · Hwacheon 96 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 T’ongch’ŏn-ŭp (38.9539°, 127.8917°, elevation 6 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).