Onega weather in September

In September, Onega sees average daytime highs of 12°C and overnight lows near 8°C, with 82 mm of precipitation across 13.7 wet days and about 12.7 hours of daylight. It is the 4th-warmest and 1st-wettest month of the year here.

Highs ease over the month, from about 14°C in the first days to 9°C by the end. The sky is clear or mostly clear about 9% of the time in September, and the air most often feels dry.

Daylight stretches from about 14 h 18 min at the start of September to 11 h 06 min by month's end. Set against the rest of the year, September is Onega's 7th-clearest and 6th-windiest month. For the whole year in context, see Onega's year-round climate.

Daytime high
12°
4th warmest
Overnight low
9th coldest
Precipitation
82 mm
13.7 wet days
Daylight
12 h 36 min
6:03 AM – 6:41 PM
Cloud cover
76%
7th clearest
Wind
17 km/h
6th windiest
Solar energy
1.99 kWh/m²
Travel score
2.7
out of 10

Onega is town in Arkhangelsk Oblast, Russia.

Density
528/km²
people per km²
Founded
1137

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 14°C in the first days to 9°C by the end.

A typical September day in Onega reaches about 12°C in the afternoon and slips back to 8°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 8°C and 16°C. Set against its neighbours, September runs about 5°C cooler than August and about 7°C warmer than October.

10°15°20°151015202530
Avg high (°C)Avg low (°C)
11410
21410
3149
4149
5149
6139
7139
8139
9139
10139
11138
12128
13128
14128
15128
16128
17118
18117
19117
20117
21117
22117
23107
24107
25106
26106
27106
2896
2996
3096

How September really feels in Onega

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.

Onega weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-7° / -11°3710.113.150.0
Feb-7° / -11°278.510.580.0
Mar-3° / -8°308.49.711.20.0
Apr / -3°338.6514.60.0
May / 5210.2217.81.8
Jun14° / 5810.30.1204.0
Jul18° / 12°6511.2019.15.6
Aug16° / 11°7811.70164.9
Sep12° / 8213.70.212.72.7
Oct / 8115.24.59.30.3
Nov-1° / -4°5413.211.16.10.0
Dec-4° / -8°4612.414.340.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 9% 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 77%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
12971
22872
32872
42872
52773
62674
72674
82674
92575
102476
112377
122377
132278
142278
152377
162278
172278
182278
192278
202278
212278
222179
232179
242278
252179
262179
272179
282080
292080
302080

Chance of precipitation in September

Any precipitationSnow

Onega gets around 82 mm of rain and snow over 13.7 wet days in September, the wettest month. 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 49% on the wettest days, and about 0 day brings snow. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)Snow chance (%)
1390
2400
3400
4410
5410
6420
7430
8440
9440
10450
11460
12460
13460
14470
15470
16470
17480
18481
19481
20481
21481
22481
23481
24482
25482
26482
27492
28493
29493
30493

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 97% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)
19010
29010
3919
4919
5928
6937
7937
8946
9955
10955
11964
12973
13973
14982
15982
16991
17991
18991
191000
201000
211000
221000
231000
241000
251000
261000
271000
281000
291000
301000

Wind in September

Winds average 17 km/h in September.

Across September, daily wind ranges from about 15 km/h on the calmest days to 18 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
115light breeze
215light breeze
316light breeze
416light breeze
516light breeze
616light breeze
716light breeze
816light breeze
916light breeze
1016light breeze
1117light breeze
1217light breeze
1317light breeze
1417light breeze
1517light breeze
1617light breeze
1717light breeze
1817light breeze
1917light breeze
2017light breeze
2118light breeze
2218light breeze
2318light breeze
2418light breeze
2518light breeze
2618light breeze
2718light breeze
2818light breeze
2918light breeze
3018light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 14 h 18 min at the start of September to 11 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 192 minutes over September. Sunrise moves from 5:19 AM to 6:44 AM, and sunset from 7:36 PM to 5:50 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
114.35:197:36
214.25:227:32
314.15:257:28
414.05:287:25
513.85:317:21
613.75:347:18
713.65:377:14
813.55:407:10
913.45:427:07
1013.35:457:03
1113.25:486:59
1213.15:516:56
1313.05:546:52
1412.95:576:48
1512.76:006:45
1612.66:036:41
1712.56:066:37
1812.46:096:34
1912.36:126:30
2012.26:156:26
2112.16:186:23
2212.06:216:19
2311.96:236:15
2411.86:266:12
2511.66:296:08
2611.56:326:04
2711.46:356:01
2811.36:385:57
2911.26:415:53
3011.16:445:50

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 1.99 kWh/m².

For context, solar energy here swings from a low near 0.04 kWh/m² to a high of 5.61 kWh/m² in June across the year — September's 1.99 kWh/m² falls in the middle.

0123151015202530
Solar energy (kWh/m²)Level
12.8Moderate
22.7Moderate
32.7Moderate
42.6Moderate
52.5Moderate
62.5Moderate
72.4Moderate
82.4Moderate
92.3Moderate
102.3Moderate
112.2Moderate
122.1Moderate
132.1Moderate
142.0Moderate
152.0Dim
161.9Dim
171.9Dim
181.8Dim
191.8Dim
201.7Dim
211.7Dim
221.6Dim
231.6Dim
241.6Dim
251.5Dim
261.5Dim
271.4Dim
281.4Dim
291.4Dim
301.3Dim
Planning a trip in September

Is September a good time to visit Onega?

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

2.7
Sightseeing
4th-best month of the year
0.0
Beach & pool
4th-best month of the year

September is a weaker month for outdoor sightseeing in Onega.

What to pack for Onega in September

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

In September, Onega sees daytime highs around 12°C and nights near 8°C. Pack a warm layer and rain gear. About 14 days see rain.

a warm layerrain gear

Sea temperature near Onega in September

The nearest coast averages about 11°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 23 km away) is warmest in August at about 13°C and coldest in February near -1°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

-5°0°5°10°15°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°C)Comfort
Jan-1Bracing
Feb-1Bracing
Mar-1Bracing
Apr0Bracing
May3Bracing
Jun6Bracing
Jul12Bracing
Aug13Bracing
Sep11Bracing
Oct6Bracing
Nov1Bracing
Dec-1Bracing

UV index in Onega in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 2. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Onega peaks around July 12 at about 5 (moderate) — a little sun protection helps at midday. It bottoms out near January 1 at about 0 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 4 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateLowJul 12UV 5Jan 1UV 0
UV index (midday)Level
Jan0Low
Feb0Low
Mar1Low
Apr2Moderate
May4Moderate
Jun4Moderate
Jul5Moderate
Aug3Moderate
Sep2Low
Oct1Low
Nov0Low
Dec0Low
Location & terrain

Where is Onega?

Onega sits at 63.9°N, 38.1°E, 21 m above sea level, in Russia. The nearest listed city is Severodvinsk, 111 km away.

Topography around Onega

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

Within 3 km, the terrain around Onega has only modest variations in elevation — a maximum elevation change of 111 m around an average of 15 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 163 m; within 80 km, significant variations in elevation — a maximum elevation change of 362 m.

The land around Onega is covered by trees (47%) and water (24%) within 3 km, trees (54%) and water (24%) within 16 km, and trees (60%) and water (21%) within 80 km.

3 km
111 m
16 km
163 m
80 km
362 m
treesshrubsgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: Severodvinsk 111 km · Yagry 113 km · Isakogorka 138 km · Arkhangel’sk 138 km · Novodvinsk 143 km · Mirnyy 169 km · Segezha 186 km · Medvezh’yegorsk 212 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 Onega (63.9057°, 38.0994°, elevation 21 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).