Usol’ye-Sibirskoye weather in September

In September, Usol’ye-Sibirskoye sees average daytime highs of 15°C and overnight lows near 5°C, with 53 mm of precipitation across 10.3 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 19°C in the first days to 12°C by the end. The sky is clear or mostly clear about 28% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 h 30 min at the start of September to 11 h 24 min by month's end. Set against the rest of the year, September is Usol’ye-Sibirskoye's 3rd-clearest and 3rd-windiest month. For the whole year in context, see Usol’ye-Sibirskoye's year-round climate.

Daytime high
15°
5th warmest
Overnight low
9th coldest
Precipitation
53 mm
10.3 wet days
Daylight
12 h 24 min
6:48 AM – 7:12 PM
Cloud cover
61%
3rd clearest
Wind
10 km/h
3rd windiest
Solar energy
3.47 kWh/m²
Travel score
4.7
out of 10

Usol’ye-Sibirskoye is town in Russia.

Density
1,161/km²
people per km²
Founded
1669

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 19°C in the first days to 12°C by the end.

A typical September day in Usol’ye-Sibirskoye reaches about 15°C in the afternoon and slips back to 5°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 9°C and 22°C. Set against its neighbours, September runs about 7°C cooler than August and about 9°C warmer than October.

10°20°30°151015202530
Avg high (°C)Avg low (°C)
1199
2198
3198
4188
5187
6187
7187
8177
9176
10176
11176
12165
13165
14165
15165
16154
17154
18154
19154
20143
21143
22143
23143
24132
25132
26132
27121
28121
29121
30111

How September really feels in Usol’ye-Sibirskoye

Once humidity and wind are folded in, September averages 0 days that feel above 32°C and 8 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
8
wind chill below the day's low

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

Usol’ye-Sibirskoye 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-16° / -25°41.22.57.90.0
Feb-10° / -22°41.52.79.50.0
Mar-1° / -14°93411.50.0
Apr10° / -3°205.53.113.62.3
May18° / 348.40.815.55.8
Jun24° / 11°6310.4016.56.7
Jul25° / 14°8812.4016.16.4
Aug22° / 12°8611.2014.56.5
Sep15° / 5310.30.412.44.7
Oct / -4°185.42.910.31.0
Nov-6° / -14°113.64.88.50.0
Dec-14° / -23°93.14.77.50.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 28% 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 56%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14357
24357
34456
44456
54258
64258
74258
84258
94258
104258
114258
124258
134357
144357
154357
164456
174456
184456
194456
204456
214456
224456
234456
244555
254555
264555
274555
284555
294555
304555

Chance of precipitation in September

Any precipitationSnow

Usol’ye-Sibirskoye gets around 53 mm of rain and snow over 10.3 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 33% and peaks near 38% on the wettest days, and about 0 day brings snow. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)Snow chance (%)
1380
2380
3370
4370
5370
6370
7370
8371
9371
10361
11361
12351
13341
14341
15331
16331
17331
18321
19322
20312
21312
22302
23302
24292
25283
26283
27273
28263
29264
30254

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 98% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)
18911
2919
3928
4937
5946
6955
7964
8973
9982
10982
11991
12991
13991
141000
151000
161000
171000
181000
191000
201000
211000
221000
231000
241000
251000
261000
271000
281000
291000
301000

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 10 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
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 30 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 126 minutes over September. Sunrise moves from 6:21 AM to 7:12 AM, and sunset from 7:49 PM to 6:37 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.56:217:49
213.46:237:46
313.36:257:44
413.26:277:42
513.26:287:39
613.16:307:37
713.06:327:34
813.06:347:32
912.96:357:29
1012.86:377:27
1112.86:397:24
1212.76:417:22
1312.66:427:19
1412.56:447:17
1512.56:467:14
1612.46:487:12
1712.36:497:09
1812.36:517:07
1912.26:537:04
2012.16:557:02
2112.16:566:59
2212.06:586:57
2311.97:006:55
2411.87:026:52
2511.87:036:50
2611.77:056:47
2711.67:076:45
2811.67:096:42
2911.57:106:40
3011.47:126:37

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.47 kWh/m².

For context, solar energy here swings from a low near 0.88 kWh/m² to a high of 6.11 kWh/m² in June across the year — September's 3.47 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.1Bright
24.1Bright
34.0Bright
44.0Moderate
54.0Moderate
63.9Moderate
73.9Moderate
83.8Moderate
93.8Moderate
103.7Moderate
113.7Moderate
123.6Moderate
133.6Moderate
143.6Moderate
153.5Moderate
163.5Moderate
173.4Moderate
183.4Moderate
193.4Moderate
203.3Moderate
213.3Moderate
223.2Moderate
233.2Moderate
243.1Moderate
253.1Moderate
263.1Moderate
273.0Moderate
283.0Moderate
293.0Moderate
302.9Moderate
Planning a trip in September

Is September a good time to visit Usol’ye-Sibirskoye?

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

4.7
Sightseeing
5th-best month of the year
0.8
Beach & pool
5th-best month of the year

September is a reasonable time to visit Usol’ye-Sibirskoye for sightseeing.

What to pack for Usol’ye-Sibirskoye in September

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

In September, Usol’ye-Sibirskoye sees daytime highs around 15°C and nights near 5°C. Worth packing: a warm layer and rain gear. About 10 days see rain.

a warm layerrain gear

UV index in Usol’ye-Sibirskoye in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 3 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Usol’ye-Sibirskoye peaks around July 12 at about 6 (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 6Dec 19UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar2Moderate
Apr4Moderate
May5High
Jun6High
Jul6High
Aug5Moderate
Sep3Moderate
Oct2Low
Nov1Low
Dec1Low

Air quality in Usol’ye-Sibirskoye 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 Usol’ye-Sibirskoye is worst in May — around 17 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (November, 8 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateGoodMay 1617 µg/m³Nov 138 µg/m³
PM2.5 (µg/m³)Level
Jan12Moderate
Feb12Moderate
Mar11Good
Apr14Moderate
May17Moderate
Jun14Moderate
Jul17Moderate
Aug14Moderate
Sep9Good
Oct9Good
Nov8Good
Dec9Good
Location & terrain

Where is Usol’ye-Sibirskoye?

Usol’ye-Sibirskoye sits at 52.8°N, 103.6°E, 435 m above sea level, in Russia. The nearest listed city is Angarsk, 28 km away.

Topography around Usol’ye-Sibirskoye

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Usol’ye-Sibirskoye.

Within 3 km, the terrain around Usol’ye-Sibirskoye has only modest variations in elevation — a maximum elevation change of 91 m around an average of 438 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 213 m; within 80 km, large variations in elevation — a maximum elevation change of 1,029 m.

The land around Usol’ye-Sibirskoye is covered by trees (40%), artificial surfaces (33%) and grassland (20%) within 3 km, trees (53%) and grassland (28%) within 16 km, and trees (60%) and grassland (22%) within 80 km.

3 km
91 m
16 km
213 m
80 km
1,029 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Angarsk 28 km · Cheremkhovo 58 km · Irkutsk 67 km · Shelekhov 67 km · Markova 72 km · Slyudyanka 121 km · Baykal’sk 142 km · Zima 168 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 Usol’ye-Sibirskoye (52.7519°, 103.6453°, elevation 435 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).