Mykolayiv weather in September

In September, Mykolayiv sees average daytime highs of 23°C and overnight lows near 12°C, with 42 mm of rain across 5.8 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 25°C in the first days to 20°C by the end. The sky is clear or mostly clear about 43% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 h 12 min at the start of September to 11 h 30 min by month's end. Set against the rest of the year, September is Mykolayiv's 3rd-clearest and 8th-windiest month. For the whole year in context, see Mykolayiv's year-round climate.

Daytime high
23°
4th warmest
Overnight low
12°
9th coldest
Rainfall
42 mm
5.8 wet days
Daylight
12 h 18 min
5:36 AM – 5:56 PM
Cloud cover
48%
3rd clearest
Wind
12 km/h
8th windiest
Solar energy
3.92 kWh/m²
Travel score
7.5
out of 10

Mykolayiv is capital city of Mykolaiv Oblast in southern Ukraine.

Density
1,858/km²
people per km²
Founded
1789

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 25°C in the first days to 20°C by the end.

A typical September day in Mykolayiv reaches about 23°C in the afternoon and slips back to 12°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 29°C. Set against its neighbours, September runs about 6°C cooler than August and about 7°C warmer than October.

10°20°30°151015202530
Avg high (°C)Avg low (°C)
12615
22615
32514
42514
52514
62514
72514
82414
92413
102413
112413
122413
132313
142313
152312
162312
172312
182212
192212
202212
212212
222211
232111
242111
252111
262111
272011
282011
292010
302010

How September really feels in Mykolayiv

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.

Mykolayiv 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 / -4°336.63.98.70.0
Feb / -4°296.12.7100.0
Mar / 337.71.911.61.4
Apr15° / 3470.313.35.0
May22° / 12°449.1014.87.0
Jun26° / 16°539015.66.9
Jul29° / 18°346.6015.36.2
Aug29° / 17°375.30146.5
Sep23° / 12°425.8012.47.5
Oct15° / 305.2010.65.2
Nov / 336.119.11.4
Dec / -2°326.42.48.40.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 43% 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 38%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16436
26436
36337
46337
56337
66436
76436
86535
96535
106535
116634
126634
136733
146634
156634
166733
176634
186535
196337
206337
216139
226040
235842
245644
255644
265446
275446
285248
295248
305050

Chance of precipitation in September

Any precipitation

Mykolayiv gets around 42 mm of rain over 5.8 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 19% and peaks near 21% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
121
221
321
421
521
621
720
820
920
1020
1120
1220
1320
1419
1519
1619
1719
1819
1919
2019
2119
2219
2319
2418
2518
2618
2718
2818
2918
3018

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 73% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
16324121
26324121
36424111
46524101
5672391
6672391
7682381
8712270
9712270
10722260
11732160
12732160
13742150
14752050
15752050
16761950
17761950
18761950
19771850
20771850
21771850
22771850
23771850
24781750
25771760
26771760
27771760
28771760
29781660
30781660

Wind in September

Winds average 12 km/h in September.

Across September, daily wind ranges from about 12 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
112light breeze
212light breeze
312light breeze
412light breeze
512light breeze
612light breeze
712light breeze
812light breeze
912light breeze
1012light breeze
1112light breeze
1212light breeze
1312light breeze
1412light breeze
1512light breeze
1612light breeze
1712light breeze
1812light breeze
1912light breeze
2012light breeze
2112light 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 12 min at the start of September to 11 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 102 minutes over September. Sunrise moves from 5:16 AM to 5:56 AM, and sunset from 6:27 PM to 5:27 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.25:166:27
213.15:186:25
313.15:196:23
413.05:206:21
513.05:226:19
612.95:236:17
712.85:246:15
812.85:266:13
912.75:276:11
1012.75:286:09
1112.65:306:07
1212.65:316:05
1312.55:326:03
1412.45:346:00
1512.45:355:58
1612.35:365:56
1712.35:385:54
1812.25:395:52
1912.25:405:50
2012.15:425:48
2112.05:435:46
2212.05:455:44
2311.95:465:42
2411.95:475:40
2511.85:495:37
2611.85:505:35
2711.75:515:33
2811.65:535:31
2911.65:545:29
3011.55:565:27

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.92 kWh/m².

For context, solar energy here swings from a low near 0.9 kWh/m² to a high of 6.27 kWh/m² in July across the year — September's 3.92 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.7Bright
24.6Bright
34.5Bright
44.5Bright
54.5Bright
64.4Bright
74.4Bright
84.3Bright
94.3Bright
104.2Bright
114.2Bright
124.1Bright
134.1Bright
144.0Bright
154.0Moderate
163.9Moderate
173.9Moderate
183.8Moderate
193.8Moderate
203.7Moderate
213.7Moderate
223.6Moderate
233.6Moderate
243.5Moderate
253.5Moderate
263.4Moderate
273.3Moderate
283.3Moderate
293.2Moderate
303.2Moderate
Planning a trip in September

Is September a good time to visit Mykolayiv?

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

7.5
Sightseeing
1st-best month of the year
5.6
Beach & pool
4th-best month of the year

September is one of the better times to visit Mykolayiv for general sightseeing.

What to pack for Mykolayiv in September

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

In September, Mykolayiv sees daytime highs around 23°C and nights near 12°C. Worth packing: light clothes. About 6 days see rain.

light clothes

Sea temperature near Mykolayiv in September

The nearest coast averages about 20°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 61 km away) is warmest in August at about 23°C and coldest in February near 4°C.

It's comfortable for a long swim from Jun 14 to Sep 13 — about 3 months when the water holds above 20°C.

0°10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan5Bracing
Feb4Bracing
Mar5Bracing
Apr9Bracing
May16Cool
Jun21Refreshing
Jul23Refreshing
Aug23Refreshing
Sep20Cool
Oct16Cool
Nov11Bracing
Dec8Bracing

UV index in Mykolayiv in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Mykolayiv peaks around July 22 at about 7 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 20 at about 1 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJul 22UV 7Dec 20UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar3Moderate
Apr5High
May5Moderate
Jun6High
Jul7Very high
Aug7Very high
Sep5High
Oct3Moderate
Nov1Low
Dec1Low
Location & terrain

Where is Mykolayiv?

Mykolayiv sits at 47.0°N, 32.0°E, 42 m above sea level, in Ukraine. The nearest listed city is Kherson, 61 km away.

PivdenneVoznesenskNova KakhovkaOdessaPivdennoukrainskKakhovka

Topography around Mykolayiv

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

Within 3 km, the terrain around Mykolayiv has only modest variations in elevation — a maximum elevation change of 56 m around an average of 19 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 76 m; within 80 km, only modest variations in elevation — a maximum elevation change of 138 m.

The land around Mykolayiv is covered by artificial surfaces (53%) and water (26%) within 3 km, cropland (44%) within 16 km, and cropland (63%) within 80 km.

3 km
56 m
16 km
76 m
80 km
138 m
treesgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: Kherson 61 km · Oleshky 68 km · Pivdenne 78 km · Voznesensk 82 km · Nova Kakhovka 106 km · Odessa 110 km · Pivdennoukrainsk 113 km · Kakhovka 114 km

Ukraine travel facts

Travel advisory
Level 4
Do Not Travel
Power plugs
Type C / F
230 V · 50 Hz
Prices
≈ 31% of US
price level, 2025
GDP per capita
$5,866
2025
Happiness
4.7 / 10
World Happiness, 2025
Safe drinking water
88%
of population, 2024
Homicide rate
3.8
per 100k, 2021
Road deaths
10.2
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Moderate
EF EPI 526

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 Mykolayiv (46.9763°, 31.993°, elevation 42 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).