Sinp’o weather in September

In September, Sinp’o sees average daytime highs of 21°C and overnight lows near 19°C, with 101 mm of rain across 7.8 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 19°C by the end. The sky is clear or mostly clear about 42% 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 Sinp’o's 8th-clearest and 10th-windiest month. For the whole year in context, see Sinp’o's year-round climate.

Daytime high
21°
3rd warmest
Overnight low
19°
10th coldest
Rainfall
101 mm
7.8 wet days
Daylight
12 h 18 min
6:14 AM – 6:29 PM
Cloud cover
52%
8th clearest
Wind
12 km/h
10th windiest
Solar energy
4.25 kWh/m²
Travel score
6.8
out of 10

Sinp’o is city in North Korea.

Density
3,553/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 19°C by the end.

A typical September day in Sinp’o 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 23°C. Set against its neighbours, September runs about 3°C cooler than August and about 5°C warmer than October.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
12321
22220
32220
42220
52220
62220
72220
82220
92220
102119
112119
122119
132119
142119
152119
162119
172118
182018
192018
202018
212018
222018
232017
242017
251917
261917
271917
281917
291916
301916

How September really feels in Sinp’o

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.

Sinp’o 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°346.46.89.50.0
Feb / -2°255.35.210.40.0
Mar / 305.33.111.70.3
Apr10° / 4560.4132.4
May14° / 11°767.1014.24.7
Jun19° / 16°747014.86.2
Jul22° / 20°16911.5014.66.4
Aug24° / 22°17512013.66.6
Sep21° / 19°1017.8012.36.8
Oct16° / 13°546.4010.95.7
Nov / 588.11.39.82.1
Dec / -0°397.15.29.20.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 42% 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 45%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14951
24951
35050
45050
55149
65149
75149
85149
95248
105248
115248
125347
135347
145446
155446
165545
175644
185644
195743
205743
215743
225941
235941
246040
256040
266139
276139
286238
296238
306337

Chance of precipitation in September

Any precipitation

Sinp’o gets around 101 mm of rain over 7.8 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 26% and peaks near 33% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
133
232
331
430
530
629
729
828
928
1027
1127
1227
1326
1426
1526
1626
1725
1825
1925
2025
2124
2224
2324
2424
2524
2623
2723
2823
2923
3022

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 31% of days. Sticky, muggy-or-worse air turns up on roughly 17% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1213353811
2315373610
3316383410
441739329
541940308
652040287
762240266
872341245
982540235
1092640214
11112840193
12122939173
13143138152
14163237132
15173336121
16193535101
1721363391
1822373281
1924383070
2026392960
2128402750
2229412640
2331412430
2434422230
2536422120
2638411920
2740411810
2843401610
2945391510
3048381410

Wind in September

Winds average 12 km/h in September.

Across September, daily wind ranges from about 12 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
112calm
212calm
312calm
412calm
512calm
612calm
712calm
812light breeze
912light breeze
1012light breeze
1112light breeze
1212light breeze
1312light breeze
1412light breeze
1512light breeze
1612light breeze
1712light breeze
1812light breeze
1912light breeze
2012light breeze
2112light breeze
2212light breeze
2312light breeze
2412light breeze
2512light breeze
2612light breeze
2713light breeze
2813light breeze
2913light breeze
3013light 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 5:59 AM to 6:28 AM, and sunset from 6:55 PM to 6:05 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.95:596:55
212.96:006:53
312.86:016:51
412.86:026:50
512.86:036:48
612.76:046:46
712.76:056:45
812.66:066:43
912.66:076:41
1012.56:086:40
1112.56:096:38
1212.46:106:36
1312.46:116:35
1412.36:126:33
1512.36:136:31
1612.36:146:29
1712.26:156:28
1812.26:166:26
1912.16:176:24
2012.16:186:22
2112.06:196:21
2212.06:206:19
2311.96:216:17
2411.96:226:16
2511.96:236:14
2611.86:246:12
2711.86:256:10
2811.76:266:09
2911.76:276:07
3011.66:286:05

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.25 kWh/m².

For context, solar energy here swings from a low near 2.09 kWh/m² to a high of 5.85 kWh/m² in May across the year — September's 4.25 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.4Bright
24.4Bright
34.4Bright
44.4Bright
54.3Bright
64.3Bright
74.3Bright
84.3Bright
94.3Bright
104.3Bright
114.3Bright
124.3Bright
134.3Bright
144.3Bright
154.3Bright
164.2Bright
174.2Bright
184.2Bright
194.2Bright
204.2Bright
214.2Bright
224.2Bright
234.2Bright
244.1Bright
254.1Bright
264.1Bright
274.1Bright
284.1Bright
294.0Bright
304.0Bright
Planning a trip in September

Hazard calendar for Sinp’o

In seasonPeak

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

Sinp’o sits in the Pacific typhoon belt; the season peaks July–October.

Sinp’o'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 Sinp’o?

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

6.8
Sightseeing
1st-best month of the year
3.9
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Sinp’o for sightseeing.

What to pack for Sinp’o in September

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

In September, Sinp’o sees daytime highs around 21°C and nights near 19°C. Little to plan around — just the basics. About 8 days see rain.

Sea temperature near Sinp’o 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 18 km away) is warmest in August at about 23°C and coldest in February near 4°C.

It's comfortable for a long swim from Jul 10 to Sep 26 — about 2.6 months when the water holds above 20°C.

0°10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan6Bracing
Feb4Bracing
Mar5Bracing
Apr8Bracing
May12Bracing
Jun17Cool
Jul21Refreshing
Aug23Refreshing
Sep21Refreshing
Oct18Cool
Nov13Bracing
Dec8Bracing

UV index in Sinp’o 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 Sinp’o peaks around August 19 at about 8 (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 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighVery highModerateLowAug 19UV 8Dec 22UV 2
UV index (midday)Level
Jan2Low
Feb2Moderate
Mar4Moderate
Apr5High
May7Very high
Jun7High
Jul6High
Aug8Very high
Sep7Very high
Oct5Moderate
Nov2Moderate
Dec2Low

Air quality in Sinp’o 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 Sinp’o is worst in March — around 57 µg/m³ PM2.5 (unhealthy), about 3.0× the cleanest month (September, 19 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorPoorModerateMar 1856 µg/m³Sep 1019 µg/m³
PM2.5 (µg/m³)Level
Jan41Poor
Feb47Poor
Mar57Unhealthy
Apr50Poor
May41Poor
Jun26Moderate
Jul22Moderate
Aug20Moderate
Sep19Moderate
Oct29Moderate
Nov33Moderate
Dec35Moderate
Location & terrain

Where is Sinp’o?

Sinp’o sits at 40.0°N, 128.2°E, 39 m above sea level, in North Korea. The nearest listed city is Yuktae-dong, 3.0 km away.

Iwŏn-ŭpHŭngnamHamhŭngYŏnggwang-ŭpChangam-ch’on

Topography around Sinp’o

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

Within 3 km, the terrain around Sinp’o has significant variations in elevation — a maximum elevation change of 516 m around an average of 77 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,001 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,358 m.

The land around Sinp’o is covered by trees (31%) and water (29%) within 3 km, water (53%) and trees (27%) within 16 km, and trees (47%) and water (36%) within 80 km.

3 km
516 m
16 km
1,001 m
80 km
2,358 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Yuktae-dong 3.0 km · Hongwŏn 20 km · Samho-rodongjagu 29 km · Iwŏn-ŭp 50 km · Hŭngnam 53 km · Hamhŭng 58 km · Yŏnggwang-ŭp 63 km · Changam-ch’on 80 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 Sinp’o (40.0397°, 128.1943°, elevation 39 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).