Korsakov weather in September

In September, Korsakov sees average daytime highs of 18°C and overnight lows near 11°C, with 96 mm of rain across 10.8 wet days and about 12.4 hours of daylight. It is the 3rd-warmest and 2nd-wettest month of the year here.

Highs ease over the month, from about 20°C in the first days to 16°C by the end. The sky is clear or mostly clear about 31% 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 Korsakov's 3rd-clearest and 7th-windiest month. For the whole year in context, see Korsakov's year-round climate.

Daytime high
18°
3rd warmest
Overnight low
11°
10th coldest
Rainfall
96 mm
10.8 wet days
Daylight
12 h 18 min
6:13 AM – 6:33 PM
Cloud cover
62%
3rd clearest
Wind
13 km/h
7th windiest
Solar energy
3.75 kWh/m²
Travel score
5.5
out of 10

Korsakov is town in Sakhalin Oblast, Russia.

Density
1,350/km²
people per km²
Founded
1853

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 16°C by the end.

A typical September day in Korsakov reaches about 18°C in the afternoon and slips back to 11°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 14°C and 21°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)
12014
22014
32013
42013
52013
61913
71913
81913
91912
101912
111912
121912
131811
141811
151811
161811
171811
181710
191710
201710
211710
221710
23169
24169
25169
26169
27169
28168
29158
30158

How September really feels in Korsakov

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.

Korsakov weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-7° / -14°416.17.48.80.0
Feb-6° / -14°325.36.7100.0
Mar-1° / -9°537.88.211.60.0
Apr / -2°619.66.213.30.6
May11° / 659.61.414.82.8
Jun15° / 558.7015.64.4
Jul18° / 13°799015.35.7
Aug20° / 15°10210.30146.0
Sep18° / 11°9610.8012.45.5
Oct12° / 8310.40.410.63.0
Nov / -3°6394.89.20.2
Dec-4° / -11°537.47.98.40.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 31% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 14% of September, with mostly cloudy or overcast conditions the remaining 55%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13664
23763
33763
43862
53961
64060
74060
84159
94258
104357
114357
124456
134654
144654
154753
164852
174852
184951
194951
204951
214951
225050
235050
244951
254951
265050
275050
285149
295149
305149

Chance of precipitation in September

Any precipitation

Korsakov gets around 96 mm of rain over 10.8 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 36% and peaks near 37% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
133
234
334
434
534
635
735
835
936
1036
1136
1237
1337
1437
1537
1637
1736
1836
1936
2036
2137
2237
2337
2437
2536
2636
2736
2836
2936
3036

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 66% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
13141234
23341224
33540214
43739204
53939193
64238183
74437163
84736152
94935142
105134132
115532121
125731111
13612991
14632881
15662671
16682561
17722350
18752140
19772030
20791830
21811720
22831520
23851410
24871210
25881110
2690910
2792800
2893700
2994600
3095500

Wind in September

Winds average 13 km/h in September.

Across September, daily wind ranges from about 12 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
112light breeze
212light breeze
312light breeze
412light breeze
512light breeze
612light breeze
712light breeze
812light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3014light breeze

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 6:32 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
512.95:596:56
612.96:006:54
712.86:016:52
812.86:036:50
912.76:046:47
1012.76:056:45
1112.66:076:43
1212.66:086:41
1312.56:096:39
1412.46:116:37
1512.46:126:35
1612.36:136:33
1712.36:156:31
1812.26:166:29
1912.26:176:27
2012.16:196:25
2112.06:206:23
2212.06:216:21
2311.96:236:18
2411.96:246:16
2511.86:256:14
2611.86:276:12
2711.76:286:10
2811.66:306:08
2911.66:316:06
3011.56:326:04

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
253.5Moderate
263.4Moderate
273.4Moderate
283.3Moderate
293.3Moderate
303.3Moderate
Planning a trip in September

Is September a good time to visit Korsakov?

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

5.5
Sightseeing
3rd-best month of the year
1.8
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Korsakov for sightseeing.

What to pack for Korsakov in September

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

In September, Korsakov sees daytime highs around 18°C and nights near 11°C. Worth packing: rain gear. About 11 days see rain.

rain gear

Sea temperature near Korsakov in September

The nearest coast averages about 16°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 17°C and coldest in February near -0°C.

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

0°10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan1Bracing
Feb0Bracing
Mar0Bracing
Apr1Bracing
May5Bracing
Jun9Bracing
Jul14Bracing
Aug17Cool
Sep16Cool
Oct11Bracing
Nov7Bracing
Dec3Bracing

UV index in Korsakov 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 Korsakov 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 Korsakov?

Korsakov sits at 46.6°N, 142.8°E, 61 m above sea level, in Russia. The nearest listed city is Yuzhno-Sakhalinsk, 36 km away.

Topography around Korsakov

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

Within 3 km, the terrain around Korsakov has only modest variations in elevation — a maximum elevation change of 121 m around an average of 38 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 462 m; within 80 km, large variations in elevation — a maximum elevation change of 1,026 m.

The land around Korsakov is covered by trees (38%) and artificial surfaces (23%) within 3 km, water (62%) and trees (32%) within 16 km, and water (50%) and trees (46%) within 80 km.

3 km
121 m
16 km
462 m
80 km
1,026 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Yuzhno-Sakhalinsk 36 km · Nevel’sk 71 km · Kholmsk 72 km · Makubetsu 159 km · Wakkanai 161 km · Nayoro 255 km · Mombetsu 258 km · Minamishibetsuchō 278 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 Korsakov (46.6341°, 142.7829°, elevation 61 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).