Baykal’sk weather in September

In September, Baykal’sk sees average daytime highs of 13°C and overnight lows near 8°C, with 113 mm of precipitation across 14.3 wet days and about 12.4 hours of daylight. It is the 4th-warmest and 3rd-wettest month of the year here.

Highs ease over the month, from about 16°C in the first days to 10°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 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 Baykal’sk's 6th-clearest and 4th-windiest month. For the whole year in context, see Baykal’sk's year-round climate.

Daytime high
13°
4th warmest
Overnight low
9th coldest
Precipitation
113 mm
14.3 wet days
Daylight
12 h 24 min
6:46 AM – 7:09 PM
Cloud cover
60%
6th clearest
Wind
11 km/h
4th windiest
Solar energy
3.52 kWh/m²
Travel score
3.3
out of 10

Baykal’sk is town in Slyudyansky District, Irkutsk Oblast, Russia.

Density
19/km²
people per km²
Founded
1961

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 10°C by the end.

A typical September day in Baykal’sk reaches about 13°C in the afternoon and slips back to 8°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 8°C and 18°C. Set against its neighbours, September runs about 5°C cooler than August and about 7°C warmer than October.

10°20°151015202530
Avg high (°C)Avg low (°C)
11611
21611
31611
41510
51510
61510
71510
8159
9149
10149
11149
12149
13148
14138
15138
16138
17137
18137
19127
20127
21126
22126
23126
24116
25115
26115
27115
28105
29104
30104

How September really feels in Baykal’sk

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.

Baykal’sk weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-13° / -18°114.16.98.10.0
Feb-10° / -16°103.55.39.60.0
Mar-4° / -10°226.57.611.50.0
Apr / -3°358.77.813.50.1
May10° / 6010.84.515.32.0
Jun16° / 9613.10.416.34.4
Jul18° / 13°15115.5015.95.2
Aug18° / 13°16215.70.114.45.1
Sep13° / 11314.33.512.43.3
Oct / 5510.98.410.40.7
Nov-2° / -7°4412.214.28.60.0
Dec-8° / -13°278.9127.70.0

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 19% of September, with mostly cloudy or overcast conditions the remaining 52%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14555
24555
34555
44654
54654
64753
74753
84753
94852
104852
114951
125050
135050
145050
155050
165050
175050
185050
195050
204951
214852
224852
234753
244852
254852
264852
274753
284852
294852
304753

Chance of precipitation in September

Any precipitationSnow

Baykal’sk gets around 113 mm of rain and snow over 14.3 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 46% and peaks near 51% on the wettest days, and about 4 days bring snow. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)Snow chance (%)
1514
2514
3514
4515
5515
6516
7516
8517
9507
10508
11498
12488
13479
14469
154510
164510
174411
184412
194412
204413
214314
224315
234316
244316
254217
264218
274219
284219
294220
304121

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 95% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
180191
283170
384160
486140
587130
689110
790100
89280
99370
109460
119640
129640
139730
149820
159820
169910
179910
189910
199910
2010000
2110000
2210000
2310000
2410000
2510000
2610000
2710000
2810000
2910000
3010000

Wind in September

Winds average 11 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
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm

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 6:21 AM to 7:09 AM, and sunset from 7:45 PM to 6:36 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.46:217:45
213.36:237:43
313.36:257:40
413.26:267:38
513.16:287:36
613.16:307:33
713.06:317:31
812.96:337:29
912.96:357:26
1012.86:367:24
1112.76:387:21
1212.76:397:19
1312.66:417:17
1412.56:437:14
1512.56:447:12
1612.46:467:09
1712.36:487:07
1812.36:497:05
1912.26:517:02
2012.16:537:00
2112.16:546:57
2212.06:566:55
2311.96:586:53
2411.86:596:50
2511.87:016:48
2611.77:036:45
2711.67:046:43
2811.67:066:41
2911.57:086:38
3011.47:096:36

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.52 kWh/m².

For context, solar energy here swings from a low near 0.87 kWh/m² to a high of 6.2 kWh/m² in May across the year — September's 3.52 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.1Bright
24.1Bright
34.0Bright
44.0Bright
54.0Moderate
63.9Moderate
73.9Moderate
83.9Moderate
93.8Moderate
103.8Moderate
113.7Moderate
123.7Moderate
133.7Moderate
143.6Moderate
153.6Moderate
163.5Moderate
173.5Moderate
183.5Moderate
193.4Moderate
203.4Moderate
213.3Moderate
223.3Moderate
233.2Moderate
243.2Moderate
253.1Moderate
263.1Moderate
273.1Moderate
283.0Moderate
293.0Moderate
302.9Moderate
Planning a trip in September

Hazard calendar for Baykal’sk

In seasonPeak

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

Baykal’sk's rainy season runs June–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 Baykal’sk?

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

3.3
Sightseeing
4th-best month of the year
0.1
Beach & pool
4th-best month of the year

September is a weaker month for outdoor sightseeing in Baykal’sk.

What to pack for Baykal’sk in September

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

In September, Baykal’sk sees daytime highs around 13°C and nights near 8°C. Pack rain gear. Worth having: a warm layer. About 14 days see rain.

rain geara warm layer

UV index in Baykal’sk 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 Baykal’sk peaks around July 12 at about 7 (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.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJul 12UV 7Dec 19UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar3Moderate
Apr6High
May6High
Jun6High
Jul7High
Aug5High
Sep4Moderate
Oct2Low
Nov1Low
Dec1Low

Air quality in Baykal’sk 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 Baykal’sk is worst in June — around 17 µg/m³ PM2.5 (moderate), about 3.7× the cleanest month (November, 5 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJun 1916 µg/m³Nov 205 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb8Good
Mar9Good
Apr12Good
May11Good
Jun17Moderate
Jul14Moderate
Aug12Good
Sep6Good
Oct5Good
Nov5Good
Dec5Good
Location & terrain

Where is Baykal’sk?

Baykal’sk sits at 51.5°N, 104.1°E, 495 m above sea level, in Russia. The nearest listed city is Slyudyanka, 34 km away.

Topography around Baykal’sk

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

Within 3 km, the terrain around Baykal’sk has significant variations in elevation — a maximum elevation change of 541 m around an average of 537 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,663 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,962 m.

The land around Baykal’sk is covered by trees (67%) and water (23%) within 3 km, trees (51%) and water (44%) within 16 km, and trees (68%) within 80 km.

3 km
541 m
16 km
1,663 m
80 km
1,962 m
treesgrasslandartificial surfacesbare terrainwatermoss and lichen
September weather nearby: Slyudyanka 34 km · Markova 77 km · Shelekhov 78 km · Irkutsk 87 km · Angarsk 117 km · Usol’ye-Sibirskoye 142 km · Gusinoozyorsk 166 km · Cheremkhovo 195 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 Baykal’sk (51.515°, 104.1402°, elevation 495 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).