Poronaysk weather in September

In September, Poronaysk sees average daytime highs of 16°C and overnight lows near 9°C, with 105 mm of rain across 11.6 wet days and about 12.4 hours of daylight. It is the 3rd-warmest and 3rd-wettest month of the year here.

Highs ease over the month, from about 18°C in the first days to 14°C by the end. The sky is clear or mostly clear about 33% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 h 18 min at the start of September to 11 h 30 min by month's end. Set against the rest of the year, September is Poronaysk's 4th-clearest and 8th-windiest month. For the whole year in context, see Poronaysk's year-round climate.

Daytime high
16°
3rd warmest
Overnight low
10th coldest
Rainfall
105 mm
11.6 wet days
Daylight
12 h 24 min
6:11 AM – 6:33 PM
Cloud cover
59%
4th clearest
Wind
12 km/h
8th windiest
Solar energy
3.49 kWh/m²
Travel score
4.8
out of 10

Poronaysk is human settlement in Poronaysky District, Sakhalin Oblast, Russia.

Density
303/km²
people per km²
Founded
1869

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 18°C in the first days to 14°C by the end.

A typical September day in Poronaysk reaches about 16°C in the afternoon and slips back to 9°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 12°C and 20°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)
11812
21811
31811
41811
51811
61811
71811
81710
91710
101710
111710
121710
13179
14169
15169
16169
17168
18168
19158
20158
21157
22157
23157
24147
25147
26146
27146
28146
29136
30135

How September really feels in Poronaysk

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.

Poronaysk 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-11° / -19°4267.58.50.0
Feb-10° / -19°295.46.49.80.0
Mar-4° / -12°538.19.311.60.0
Apr / -4°75109.113.40.1
May / 7410.53.415.12.0
Jun14° / 599.2015.94.0
Jul17° / 11°809.1015.65.4
Aug19° / 13°10912014.25.6
Sep16° / 10511.6012.44.8
Oct / 10911.2210.51.8
Nov-0° / -7°708.57.58.90.0
Dec-9° / -16°546.67.88.10.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 33% 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 53%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13862
23961
33961
44060
54060
64159
74258
84357
94456
104555
114555
124654
134852
144852
154951
164951
175050
185149
195149
205149
215149
225149
235149
245149
255149
265149
275248
285248
295347
305347

Chance of precipitation in September

Any precipitation

Poronaysk gets around 105 mm of rain over 11.6 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 39% and peaks near 41% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
137
237
337
437
537
637
737
837
937
1037
1138
1238
1338
1439
1539
1639
1739
1839
1939
2040
2140
2241
2341
2441
2541
2641
2741
2841
2940
3040

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 85% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
160337
262326
363316
466295
568284
670264
772253
874233
976222
1078202
1180182
1283161
1385141
1487121
1588111
169091
179181
189361
199550
209640
219640
229730
239730
249820
259820
269910
279910
289910
299910
309910

Wind in September

Winds average 12 km/h in September.

Across September, daily wind ranges from about 11 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
111calm
211calm
311calm
412calm
512calm
612calm
712calm
812calm
912calm
1012calm
1112calm
1212calm
1312calm
1412calm
1512calm
1612calm
1712calm
1812calm
1912light breeze
2012light breeze
2112light breeze
2212light breeze
2312light breeze
2412light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 18 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 108 minutes over September. Sunrise moves from 5:49 AM to 6:32 AM, and sunset from 7:06 PM to 6:02 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.35:497:06
213.25:507:04
313.25:527:01
413.15:536:59
513.05:556:57
613.05:566:55
712.95:586:53
812.95:596:51
912.86:016:48
1012.76:026:46
1112.76:046:44
1212.66:056:42
1312.56:076:39
1412.56:086:37
1512.46:106:35
1612.46:116:33
1712.36:136:30
1812.26:146:28
1912.26:166:26
2012.16:176:24
2112.06:196:22
2212.06:206:19
2311.96:226:17
2411.96:236:15
2511.86:256:13
2611.76:266:10
2711.76:286:08
2811.66:296:06
2911.56:316:04
3011.56:326:02

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.49 kWh/m².

For context, solar energy here swings from a low near 1.25 kWh/m² to a high of 5.28 kWh/m² in April across the year — September's 3.49 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.8Moderate
23.8Moderate
33.8Moderate
43.8Moderate
53.7Moderate
63.7Moderate
73.7Moderate
83.7Moderate
93.7Moderate
103.7Moderate
113.6Moderate
123.6Moderate
133.6Moderate
143.6Moderate
153.6Moderate
163.5Moderate
173.5Moderate
183.5Moderate
193.4Moderate
203.4Moderate
213.4Moderate
223.3Moderate
233.3Moderate
243.3Moderate
253.2Moderate
263.2Moderate
273.1Moderate
283.1Moderate
293.1Moderate
303.0Moderate
Planning a trip in September

Is September a good time to visit Poronaysk?

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

4.8
Sightseeing
3rd-best month of the year
0.8
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Poronaysk for sightseeing.

What to pack for Poronaysk in September

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

In September, Poronaysk sees daytime highs around 16°C and nights near 9°C. Worth packing: a warm layer and rain gear. About 12 days see rain.

a warm layerrain gear

Sea temperature near Poronaysk in September

The nearest coast averages about 14°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 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
Feb0Bracing
Mar0Bracing
Apr1Bracing
May4Bracing
Jun8Bracing
Jul13Bracing
Aug16Cool
Sep14Bracing
Oct10Bracing
Nov5Bracing
Dec2Bracing

UV index in Poronaysk in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Poronaysk peaks around August 10 at about 7 (high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 17 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 10UV 7Dec 17UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar2Moderate
Apr4Moderate
May5Moderate
Jun7High
Jul7High
Aug7High
Sep4Moderate
Oct3Moderate
Nov1Low
Dec1Low
Location & terrain

Where is Poronaysk?

Poronaysk sits at 49.2°N, 143.1°E, 7 m above sea level, in Russia. The nearest listed city is Sovetskaya Gavan’, 206 km away.

Topography around Poronaysk

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

Within 3 km, the terrain around Poronaysk has only modest variations in elevation — a maximum elevation change of 13 m around an average of 3 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 256 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,304 m.

The land around Poronaysk is covered by water (38%) and trees (29%) within 3 km, water (44%), trees (29%) and wetland (21%) within 16 km, and trees (61%) and water (26%) within 80 km.

3 km
13 m
16 km
256 m
80 km
1,304 m
treesgrasslandartificial surfacesbare terrainwaterwetland
September weather nearby: Sovetskaya Gavan’ 206 km · Vanino 207 km · Yuzhno-Sakhalinsk 253 km · Kholmsk 254 km · Korsakov 288 km · Nevel’sk 297 km · Wakkanai 437 km · Makubetsu 439 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 Poronaysk (49.2204°, 143.0912°, elevation 7 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).