Hongwŏn weather in September

In September, Hongwŏn sees average daytime highs of 21°C and overnight lows near 17°C, with 102 mm of rain across 8.3 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 41% 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 Hongwŏn's 8th-clearest and 10th-windiest month. For the whole year in context, see Hongwŏn's year-round climate.

Daytime high
21°
3rd warmest
Overnight low
17°
10th coldest
Rainfall
102 mm
8.3 wet days
Daylight
12 h 18 min
6:15 AM – 6:30 PM
Cloud cover
53%
8th clearest
Wind
10 km/h
10th windiest
Solar energy
4.26 kWh/m²
Travel score
6.9
out of 10

Hongwŏn 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 23°C in the first days to 20°C by the end.

A typical September day in Hongwŏn reaches about 21°C in the afternoon and slips back to 17°C overnight — a 4°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)
12320
22319
32319
42319
52319
62319
72319
82218
92218
102218
112218
122218
132218
142217
152117
162117
172117
182117
192117
202116
212116
222016
232016
242016
252015
262015
272015
282015
291915
301914

How September really feels in Hongwŏn

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.

Hongwŏn 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 / -6°305.86.49.50.0
Feb / -4°255.15.110.40.0
Mar / 305.33.611.70.6
Apr11° / 476.20.7133.2
May17° / 11°747.4014.25.6
Jun20° / 16°747014.86.6
Jul24° / 20°17212.2014.66.4
Aug25° / 21°18212.3013.66.4
Sep21° / 17°1028.3012.36.9
Oct16° / 11°516.8010.95.8
Nov / 5681.69.82.0
Dec / -3°356.55.19.20.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 41% 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 47%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14753
24753
34852
44852
54951
64852
74852
84951
94852
104852
114951
125050
135050
145149
155248
165347
175347
185446
195545
205644
215644
225743
235842
245941
255941
265941
276139
286139
296139
306238

Chance of precipitation in September

Any precipitation

Hongwŏn gets around 102 mm of rain over 8.3 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 28% and peaks near 34% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
134
234
333
432
532
631
731
830
930
1029
1129
1228
1328
1428
1527
1627
1727
1827
1926
2026
2126
2225
2325
2425
2525
2624
2724
2824
2924
3023

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 15% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1214373611
2315393410
331641319
441742298
541943277
652044257
762144236
872345215
982445194
10102644174
11112744153
12132843142
13153041122
14173140112
1519323891
1621343681
1724353471
1826363260
1928373050
2030382740
2132392540
2234402330
2336412120
2438411920
2541411720
2643401510
2746401310
2849391210
2951381010
305536900

Wind in September

Winds average 10 km/h in September.

Across September, daily wind ranges from about 10 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm

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 6:00 AM to 6:29 AM, and sunset from 6:56 PM to 6:06 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.96:006:56
212.96:016:54
312.86:026:52
412.86:036:51
512.86:046:49
612.76:056:47
712.76:066:46
812.66:076:44
912.66:086:42
1012.56:096:41
1112.56:106:39
1212.46:116:37
1312.46:126:35
1412.36:136:34
1512.36:146:32
1612.36:156:30
1712.26:166:29
1812.26:176:27
1912.16:186:25
2012.16:196:23
2112.06:206:22
2212.06:216:20
2311.96:226:18
2411.96:236:17
2511.96:246:15
2611.86:256:13
2711.86:266:11
2811.76:276:10
2911.76:286:08
3011.66:296:06

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.26 kWh/m².

For context, solar energy here swings from a low near 2.17 kWh/m² to a high of 5.88 kWh/m² in May across the year — September's 4.26 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
164.3Bright
174.2Bright
184.2Bright
194.2Bright
204.2Bright
214.2Bright
224.2Bright
234.2Bright
244.2Bright
254.1Bright
264.1Bright
274.1Bright
284.1Bright
294.0Bright
304.0Bright
Planning a trip in September

Hazard calendar for Hongwŏn

In seasonPeak

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

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

Hongwŏn'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 Hongwŏn?

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

6.9
Sightseeing
1st-best month of the year
4.4
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Hongwŏn for sightseeing.

What to pack for Hongwŏn in September

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

In September, Hongwŏn sees daytime highs around 21°C and nights near 17°C. Worth packing: rain gear. About 8 days see rain.

rain gear

Sea temperature near Hongwŏn 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 18 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 5 to Sep 28 — about 2.8 months when the water holds above 20°C.

0°10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan5Bracing
Feb4Bracing
Mar5Bracing
Apr8Bracing
May12Bracing
Jun18Cool
Jul22Refreshing
Aug24Refreshing
Sep22Refreshing
Oct18Cool
Nov13Bracing
Dec8Bracing

UV index in Hongwŏn 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 Hongwŏn 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 Hongwŏn 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 Hongwŏn 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 Hongwŏn?

Hongwŏn sits at 40.0°N, 128.0°E, 29 m above sea level, in North Korea. The nearest listed city is Samho-rodongjagu, 11 km away.

HŭngnamHamhŭngYŏnggwang-ŭpIwŏn-ŭpKowŏn-ŭp

Topography around Hongwŏn

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

Within 3 km, the terrain around Hongwŏn has only modest variations in elevation — a maximum elevation change of 228 m around an average of 20 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 998 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,541 m.

The land around Hongwŏn is covered by cropland (42%) and water (25%) within 3 km, water (38%) and trees (34%) within 16 km, and trees (52%) and water (31%) within 80 km.

3 km
228 m
16 km
998 m
80 km
2,541 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Samho-rodongjagu 11 km · Yuktae-dong 17 km · Sinp’o 20 km · Hŭngnam 34 km · Hamhŭng 38 km · Yŏnggwang-ŭp 43 km · Iwŏn-ŭp 68 km · Kowŏn-ŭp 89 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 Hongwŏn (40.0253°, 127.9558°, elevation 29 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).