Omsk weather in September

In September, Omsk sees average daytime highs of 16°C and overnight lows near 6°C, with 33 mm of precipitation across 7.8 wet days and about 12.5 hours of daylight. It is the 5th-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 19°C in the first days to 13°C by the end. The sky is clear or mostly clear about 18% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 h 36 min at the start of September to 11 h 24 min by month's end. Set against the rest of the year, September is Omsk's 6th-clearest and 9th-windiest month. For the whole year in context, see Omsk's year-round climate.

Daytime high
16°
5th warmest
Overnight low
8th coldest
Precipitation
33 mm
7.8 wet days
Daylight
12 h 24 min
6:48 AM – 7:14 PM
Cloud cover
69%
6th clearest
Wind
13 km/h
9th windiest
Solar energy
2.9 kWh/m²
Travel score
4.9
out of 10

Omsk is city in Russia.

Density
2,046/km²
people per km²
Founded
1716

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 13°C by the end.

A typical September day in Omsk reaches about 16°C in the afternoon and slips back to 6°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 9°C and 23°C. Set against its neighbours, September runs about 6°C cooler than August and about 8°C warmer than October.

10°20°30°151015202530
Avg high (°C)Avg low (°C)
1199
2199
3199
4198
5188
6188
7188
8188
9177
10177
11177
12177
13166
14166
15166
16166
17156
18155
19155
20155
21145
22144
23144
24144
25134
26134
27134
28133
29133
30123

How September really feels in Omsk

Once humidity and wind are folded in, September averages 0 days that feel above 32°C and 3 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
3
wind chill below the day's low

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

Omsk weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-13° / -21°154.96.37.50.0
Feb-11° / -19°124.15.49.30.0
Mar-3° / -11°185.2511.40.0
Apr / -1°307.42.513.82.1
May18° / 3680.415.86.1
Jun23° / 12°5310.10176.8
Jul24° / 14°6211.2016.56.7
Aug22° / 11°6110.8014.76.5
Sep16° / 337.80.112.54.9
Oct / -0°3283.110.21.3
Nov-4° / -10°297.67.38.10.0
Dec-11° / -18°216.67.970.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 18% 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 68%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13664
23664
33664
43565
53565
63565
73466
83466
93367
103367
113367
123169
133169
143169
153070
163070
173070
183169
193070
202971
212971
222971
232971
243070
253070
263070
273070
283070
293070
303070

Chance of precipitation in September

Any precipitationSnow

Omsk gets around 33 mm of rain and snow over 7.8 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 27% and peaks near 33% on the wettest days, and about 0 day brings snow. The odds ease toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)Snow chance (%)
1330
2330
3320
4320
5320
6310
7310
8300
9300
10300
11290
12290
13280
14280
15270
16270
17260
18260
19250
20250
21240
22240
23231
24231
25231
26231
27232
28232
29232
30243

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 (%)
1928
2937
3946
4955
5964
6964
7973
8973
9982
10982
11982
12982
13991
14991
15991
16991
17991
181000
191000
201000
211000
221000
231000
241000
251000
261000
271000
281000
291000
301000

Wind in September

Winds average 13 km/h in September.

Across September, daily wind ranges from about 13 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light 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
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 36 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 132 minutes over September. Sunrise moves from 6:19 AM to 7:15 AM, and sunset from 7:54 PM to 6:37 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.66:197:54
213.56:217:51
313.46:237:49
413.46:257:46
513.36:267:43
613.26:287:41
713.16:307:38
813.16:327:35
913.06:347:33
1012.96:367:30
1112.86:387:27
1212.76:407:25
1312.76:427:22
1412.66:447:19
1512.56:467:17
1612.46:487:14
1712.46:507:11
1812.36:517:09
1912.26:537:06
2012.16:557:03
2112.16:577:01
2212.06:596:58
2311.97:016:55
2411.87:036:53
2511.87:056:50
2611.77:076:47
2711.67:096:45
2811.57:116:42
2911.47:136:39
3011.47:156:37

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 2.9 kWh/m².

For context, solar energy here swings from a low near 0.52 kWh/m² to a high of 6 kWh/m² in June across the year — September's 2.9 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.6Moderate
23.6Moderate
33.5Moderate
43.5Moderate
53.4Moderate
63.4Moderate
73.3Moderate
83.3Moderate
93.2Moderate
103.2Moderate
113.1Moderate
123.1Moderate
133.0Moderate
143.0Moderate
152.9Moderate
162.9Moderate
172.8Moderate
182.8Moderate
192.7Moderate
202.6Moderate
212.6Moderate
222.5Moderate
232.5Moderate
242.5Moderate
252.4Moderate
262.4Moderate
272.3Moderate
282.3Moderate
292.2Moderate
302.1Moderate
Planning a trip in September

Is September a good time to visit Omsk?

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

4.9
Sightseeing
5th-best month of the year
0.9
Beach & pool
5th-best month of the year

September is a reasonable time to visit Omsk for sightseeing.

What to pack for Omsk in September

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

In September, Omsk sees daytime highs around 16°C and nights near 6°C. Worth packing: a warm layer. About 8 days see rain.

a warm layer

UV index in Omsk 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 Omsk peaks around June 23 at about 6 (high) — a little sun protection helps at midday. It bottoms out near December 22 at about 0 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 6 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJun 23UV 6Dec 22UV 0
UV index (midday)Level
Jan1Low
Feb1Low
Mar2Moderate
Apr3Moderate
May5High
Jun6High
Jul6High
Aug4Moderate
Sep3Moderate
Oct2Low
Nov1Low
Dec0Low

Air quality in Omsk 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 Omsk is worst in April — around 16 µg/m³ PM2.5 (moderate), about 2.8× the cleanest month (December, 6 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodGoodApr 1515 µg/m³Dec 216 µg/m³
PM2.5 (µg/m³)Level
Jan6Good
Feb8Good
Mar11Good
Apr16Moderate
May10Good
Jun9Good
Jul14Moderate
Aug9Good
Sep7Good
Oct8Good
Nov8Good
Dec6Good
Location & terrain

Where is Omsk?

Omsk sits at 55.0°N, 73.4°E, 90 m above sea level, in Russia. The nearest listed city is Kalachinsk, 77 km away.

Topography around Omsk

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

Within 3 km, the terrain around Omsk has only modest variations in elevation — a maximum elevation change of 57 m around an average of 91 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 81 m; within 80 km, only modest variations in elevation — a maximum elevation change of 93 m.

The land around Omsk is covered by artificial surfaces (63%) and trees (21%) within 3 km, trees (26%), artificial surfaces (25%) and cropland (24%) within 16 km, and cropland (53%) and grassland (27%) within 80 km.

3 km
57 m
16 km
81 m
80 km
93 m
treesgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: Kalachinsk 77 km · Isil’kul’ 134 km · Tatarsk 168 km · Tara 221 km · Kupino 263 km · Petropavl 270 km · Ishim 274 km · Shchuchinsk 309 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 Omsk (54.9924°, 73.3686°, elevation 90 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).