Slyudyanka weather in September

In September, Slyudyanka sees average daytime highs of 14°C and overnight lows near 3°C, with 83 mm of precipitation across 13.4 wet days and about 12.4 hours of daylight. It is the 5th-warmest and 4th-wettest month of the year here.

Highs ease over the month, from about 16°C in the first days to 11°C by the end. The sky is clear or mostly clear about 26% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 h 24 min at the start of September to 11 h 24 min by month's end. Set against the rest of the year, September is Slyudyanka's 6th-clearest and 3rd-windiest month. For the whole year in context, see Slyudyanka's year-round climate.

Daytime high
14°
5th warmest
Overnight low
9th coldest
Precipitation
83 mm
13.4 wet days
Daylight
12 h 24 min
6:48 AM – 7:11 PM
Cloud cover
62%
6th clearest
Wind
7 km/h
3rd windiest
Solar energy
3.46 kWh/m²
Travel score
3.6
out of 10

Slyudyanka is town in Slyudyansky District, Irkutsk Oblast, Russia.

Density
495/km²
people per km²
Founded
1899

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 16°C in the first days to 11°C by the end.

A typical September day in Slyudyanka reaches about 14°C in the afternoon and slips back to 3°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 7°C and 20°C. Set against its neighbours, September runs about 6°C cooler than August and about 8°C warmer than October.

10°20°151015202530
Avg high (°C)Avg low (°C)
1177
2177
3176
4166
5166
6166
7165
8155
9155
10155
11154
12154
13144
14144
15143
16143
17133
18133
19133
20132
21122
22122
23121
24121
25111
26111
27110
28110
29100
30100

How September really feels in Slyudyanka

Once humidity and wind are folded in, September averages 0 days that feel above 32°C and 10 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
10
wind chill below the day's low

The story in September is cold — wind chill drags the overnight "feels like" below the raw low.

Slyudyanka weather by month

How September compares with the rest of the year at a glance. September is the 5th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-14° / -25°72.74.58.10.0
Feb-10° / -22°82.94.19.60.0
Mar-2° / -15°226.67.711.50.0
Apr / -5°389.98.413.60.9
May14° / 6412.34.315.33.9
Jun19° / 10014.50.216.35.4
Jul21° / 11°13316.3015.95.4
Aug19° / 10°13115.8014.45.3
Sep14° / 8313.42.812.43.6
Oct / -4°358.57.310.40.7
Nov-5° / -14°216.688.60.0
Dec-12° / -21°124.36.17.70.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 26% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 17% of September, with mostly cloudy or overcast conditions the remaining 58%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14060
24060
34159
44159
54159
64159
74159
84258
94258
104258
114258
124159
134258
144258
154357
164357
174357
184456
194456
204456
214357
224357
234456
244357
254456
264456
274456
284456
294456
304456

Chance of precipitation in September

Any precipitationSnow

Slyudyanka gets around 83 mm of rain and snow over 13.4 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 43% and peaks near 48% on the wettest days, and about 3 days bring snow. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)Snow chance (%)
1482
2482
3482
4482
5483
6483
7483
8474
9474
10474
11475
12465
13455
14456
15447
16447
17438
18439
194210
204211
214112
224113
234014
243915
253816
263817
273717
283618
293619
303620

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 99% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)
1946
2955
3964
4964
5973
6973
7982
8982
9991
10991
11991
12991
131000
141000
151000
161000
171000
181000
191000
201000
211000
221000
231000
241000
251000
261000
271000
281000
291000
301000

Wind in September

Winds average 7 km/h in September.

Across September, daily wind ranges from about 7 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 24 min at the start of September to 11 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 120 minutes over September. Sunrise moves from 6:23 AM to 7:11 AM, and sunset from 7:47 PM to 6:38 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.46:237:47
213.36:257:45
313.36:267:42
413.26:287:40
513.16:307:37
613.16:317:35
713.06:337:33
812.96:347:30
912.96:367:28
1012.86:387:26
1112.76:397:23
1212.76:417:21
1312.66:437:18
1412.56:447:16
1512.56:467:14
1612.46:487:11
1712.36:497:09
1812.36:517:06
1912.26:537:04
2012.16:547:02
2112.16:566:59
2212.06:586:57
2311.96:596:54
2411.87:016:52
2511.87:036:50
2611.77:056:47
2711.67:066:45
2811.67:086:42
2911.57:106:40
3011.47:116:38

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.46 kWh/m².

For context, solar energy here swings from a low near 0.92 kWh/m² to a high of 5.99 kWh/m² in May across the year — September's 3.46 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.0Bright
24.0Moderate
34.0Moderate
43.9Moderate
53.9Moderate
63.8Moderate
73.8Moderate
83.8Moderate
93.7Moderate
103.7Moderate
113.7Moderate
123.6Moderate
133.6Moderate
143.6Moderate
153.5Moderate
163.5Moderate
173.5Moderate
183.4Moderate
193.4Moderate
203.3Moderate
213.3Moderate
223.2Moderate
233.2Moderate
243.2Moderate
253.1Moderate
263.1Moderate
273.0Moderate
283.0Moderate
293.0Moderate
302.9Moderate
Planning a trip in September

Hazard calendar for Slyudyanka

In seasonPeak

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

Slyudyanka's rainy season runs May–September, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Slyudyanka?

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

3.6
Sightseeing
5th-best month of the year
0.2
Beach & pool
5th-best month of the year

September is a weaker month for outdoor sightseeing in Slyudyanka.

What to pack for Slyudyanka in September

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

In September, Slyudyanka sees daytime highs around 14°C and nights near 3°C. Worth packing: a warm layer and rain gear. About 13 days see rain.

a warm layerrain gear

UV index in Slyudyanka 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 Slyudyanka peaks around July 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighHighModerateLowJul 12UV 7Dec 19UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar3Moderate
Apr6High
May6High
Jun7High
Jul7Very high
Aug5High
Sep4Moderate
Oct2Low
Nov1Low
Dec1Low

Air quality in Slyudyanka 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 Slyudyanka is worst in July — around 18 µg/m³ PM2.5 (moderate), about 3.9× the cleanest month (November, 5 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodGoodModerateGoodJul 1317 µg/m³Nov 185 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb8Good
Mar9Good
Apr12Moderate
May10Good
Jun15Moderate
Jul18Moderate
Aug10Good
Sep6Good
Oct5Good
Nov5Good
Dec5Good
Location & terrain

Where is Slyudyanka?

Slyudyanka sits at 51.7°N, 103.7°E, 477 m above sea level, in Russia. The nearest listed city is Baykal’sk, 34 km away.

Topography around Slyudyanka

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

Within 3 km, the terrain around Slyudyanka has significant variations in elevation — a maximum elevation change of 463 m around an average of 534 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,435 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,201 m.

The land around Slyudyanka is covered by trees (50%) and water (34%) within 3 km, trees (74%) and water (22%) within 16 km, and trees (74%) within 80 km.

3 km
463 m
16 km
1,435 m
80 km
2,201 m
treesgrasslandartificial surfaceswatermoss and lichen
September weather nearby: Baykal’sk 34 km · Shelekhov 67 km · Markova 70 km · Irkutsk 81 km · Angarsk 101 km · Usol’ye-Sibirskoye 121 km · Cheremkhovo 171 km · Gusinoozyorsk 198 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 Slyudyanka (51.6621°, 103.71°, elevation 477 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. 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).