Yuzhno-Sakhalinsk weather in September

In September, Yuzhno-Sakhalinsk sees average daytime highs of 18°C and overnight lows near 9°C, with 104 mm of rain across 12 wet days and about 12.4 hours of daylight. It is the 3rd-warmest and 1st-wettest month of the year here.

Highs ease over the month, from about 20°C in the first days to 15°C by the end. The sky is clear or mostly clear about 29% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 h 12 min at the start of September to 11 h 30 min by month's end. Set against the rest of the year, September is Yuzhno-Sakhalinsk's 2nd-clearest and 8th-windiest month. For the whole year in context, see Yuzhno-Sakhalinsk's year-round climate.

Daytime high
18°
3rd warmest
Overnight low
10th coldest
Rainfall
104 mm
12 wet days
Daylight
12 h 18 min
6:13 AM – 6:33 PM
Cloud cover
63%
2nd clearest
Wind
10 km/h
8th windiest
Solar energy
3.75 kWh/m²
Travel score
5.3
out of 10

Yuzhno-Sakhalinsk is city in far-eastern Russia.

Density
1,208/km²
people per km²
Founded
1882

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 20°C in the first days to 15°C by the end.

A typical September day in Yuzhno-Sakhalinsk reaches about 18°C in the afternoon and slips back to 9°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 14°C and 22°C. Set against its neighbours, September runs about 3°C cooler than August and about 7°C warmer than October.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
12012
22012
32012
42012
52011
61911
71911
81911
91910
101910
111910
121810
131810
14189
15189
16189
17179
18178
19178
20178
21178
22167
23167
24167
25167
26167
27156
28156
29156
30156

How September really feels in Yuzhno-Sakhalinsk

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.

Yuzhno-Sakhalinsk weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-8° / -17°527.39.28.80.0
Feb-7° / -16°396.27.2100.0
Mar-1° / -10°638.99.811.60.0
Apr / -3°6910.78.213.30.7
May13° / 6910.82.414.83.3
Jun16° / 619.2015.65.0
Jul20° / 12°819.5015.35.9
Aug21° / 13°10411.30146.0
Sep18° / 10412012.45.3
Oct11° / 9211.7110.62.6
Nov / -6°719.46.99.20.1
Dec-5° / -14°638.79.78.40.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 29% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 54%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13862
23862
33862
43961
54159
64258
74258
84357
94357
104357
114456
124555
134654
144753
154852
164852
174852
184852
194852
204852
214852
224951
234951
244951
254951
264951
275050
285050
295050
305149

Chance of precipitation in September

Any precipitation

Yuzhno-Sakhalinsk gets around 104 mm of rain over 12 wet days in September, the wettest month. 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 41% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
136
236
337
437
537
638
738
838
939
1039
1140
1240
1341
1441
1541
1641
1741
1841
1941
2041
2141
2241
2341
2441
2540
2640
2740
2839
2939
3039

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 74% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
14337191
24437181
34636161
44835151
55134141
65333131
75532121
85731111
96029101
106128101
11652690
12682480
13712270
14732160
15761950
16791740
17801640
18831430
19841330
20861220
21881020
2289920
2391810
2492710
2593610
2694510
2796400
2897300
2997300
3098200

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 11 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
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 12 min at the start of September to 11 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 102 minutes over September. Sunrise moves from 5:53 AM to 6:33 AM, and sunset from 7:04 PM to 6:04 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.25:537:04
213.15:557:02
313.15:567:00
413.05:576:58
513.05:596:56
612.96:006:54
712.86:016:52
812.86:036:50
912.76:046:48
1012.76:056:46
1112.66:076:44
1212.66:086:42
1312.56:096:40
1412.46:116:37
1512.46:126:35
1612.36:136:33
1712.36:156:31
1812.26:166:29
1912.26:186:27
2012.16:196:25
2112.06:206:23
2212.06:226:21
2311.96:236:19
2411.96:246:17
2511.86:266:14
2611.86:276:12
2711.76:286:10
2811.66:306:08
2911.66:316:06
3011.56:336:04

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.75 kWh/m².

For context, solar energy here swings from a low near 1.38 kWh/m² to a high of 5.42 kWh/m² in May across the year — September's 3.75 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.1Bright
24.1Bright
34.1Bright
44.0Bright
54.0Bright
64.0Bright
74.0Moderate
84.0Moderate
94.0Moderate
103.9Moderate
113.9Moderate
123.9Moderate
133.9Moderate
143.8Moderate
153.8Moderate
163.8Moderate
173.7Moderate
183.7Moderate
193.7Moderate
203.6Moderate
213.6Moderate
223.6Moderate
233.5Moderate
243.5Moderate
253.4Moderate
263.4Moderate
273.4Moderate
283.3Moderate
293.3Moderate
303.3Moderate
Planning a trip in September

Is September a good time to visit Yuzhno-Sakhalinsk?

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

5.3
Sightseeing
3rd-best month of the year
1.6
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Yuzhno-Sakhalinsk for sightseeing.

What to pack for Yuzhno-Sakhalinsk in September

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

In September, Yuzhno-Sakhalinsk sees daytime highs around 18°C and nights near 9°C. Worth packing: rain gear. About 12 days see rain.

rain gear

Sea temperature near Yuzhno-Sakhalinsk in September

The nearest coast averages about 15°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 31 km away) is warmest in August at about 16°C and coldest in February near -1°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

0°10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°C)Comfort
Jan0Bracing
Feb-1Bracing
Mar-1Bracing
Apr1Bracing
May4Bracing
Jun9Bracing
Jul13Bracing
Aug16Cool
Sep15Bracing
Oct10Bracing
Nov6Bracing
Dec3Bracing

UV index in Yuzhno-Sakhalinsk in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Yuzhno-Sakhalinsk peaks around August 12 at about 7 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 19 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 6 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowAug 12UV 7Dec 19UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar3Moderate
Apr4Moderate
May6High
Jun6High
Jul7High
Aug7Very high
Sep5Moderate
Oct3Moderate
Nov1Low
Dec1Low
Location & terrain

Where is Yuzhno-Sakhalinsk?

Yuzhno-Sakhalinsk sits at 47.0°N, 142.7°E, 48 m above sea level, in Russia. The nearest listed city is Korsakov, 36 km away.

Topography around Yuzhno-Sakhalinsk

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

Within 3 km, the terrain around Yuzhno-Sakhalinsk has significant variations in elevation — a maximum elevation change of 293 m around an average of 62 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,028 m; within 80 km, large variations in elevation — a maximum elevation change of 1,026 m.

The land around Yuzhno-Sakhalinsk is covered by artificial surfaces (55%) and trees (32%) within 3 km, trees (72%) within 16 km, and trees (48%) and water (47%) within 80 km.

3 km
293 m
16 km
1,028 m
80 km
1,026 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Korsakov 36 km · Kholmsk 53 km · Nevel’sk 74 km · Makubetsu 190 km · Wakkanai 190 km · Poronaysk 253 km · Sovetskaya Gavan’ 289 km · Nayoro 290 km

Russia travel facts

Travel advisory
Level 4
Do Not Travel
Power plugs
Type C / F
230 V · 50 Hz
Prices
≈ 32% of US
price level, 2025
GDP per capita
$17,547
2025
Happiness
5.8 / 10
World Happiness, 2025
Safe drinking water
76%
of population, 2024
Homicide rate
6.8
per 100k, 2021
Road deaths
12
per 100k/yr, 2019
Income group
High
World Bank
English
Moderate
EF EPI 521
Religion
other Christian 2%

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 Yuzhno-Sakhalinsk (46.9543°, 142.7356°, elevation 48 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. 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).