Mykonos weather in September

In September, Mykonos sees average daytime highs of 24°C and overnight lows near 22°C, with 6 mm of rain across 1 wet days and about 12.3 hours of daylight. It is the 3rd-warmest and 9th-wettest month of the year here.

Highs ease over the month, from about 24°C in the first days to 22°C by the end. The sky is clear or mostly clear about 89% of the time in September, and the air most often feels muggy.

Daylight stretches from about 12 h 48 min at the start of September to 11 h 42 min by month's end. Set against the rest of the year, September is Mykonos's 4th-clearest and 9th-windiest month. For the whole year in context, see Mykonos's year-round climate.

Daytime high
24°
3rd warmest
Overnight low
22°
10th coldest
Rainfall
6 mm
1 wet days
Daylight
12 h 12 min
6:06 AM – 6:20 PM
Cloud cover
14%
4th clearest
Wind
26 km/h
9th windiest
Solar energy
5.62 kWh/m²
Travel score
9.3
out of 10

Mykonos is town on Mykonos island, South Aegean.

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 24°C in the first days to 22°C by the end.

A typical September day in Mykonos reaches about 24°C in the afternoon and slips back to 22°C overnight — a 1°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 25°C. Set against its neighbours, September runs about 2°C cooler than August and about 3°C warmer than October.

15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12523
22523
32523
42423
52423
62423
72423
82423
92423
102423
112423
122423
132423
142422
152422
162422
172322
182322
192322
202322
212322
222322
232322
242322
252321
262321
272321
282221
292221
302221

Mykonos weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan14° / 12°8011.49.73.8
Feb14° / 12°648.810.64.0
Mar14° / 13°466.611.74.8
Apr16° / 15°193.612.96.2
May19° / 18°81.6147.9
Jun23° / 21°20.414.59.4
Jul25° / 24°00.114.39.7
Aug25° / 24°0013.49.6
Sep24° / 22°6112.39.3
Oct21° / 19°313.7117.9
Nov17° / 16°436.3106.4
Dec15° / 13°6810.19.54.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 89% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 6% of September, with mostly cloudy or overcast conditions the remaining 6%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
11000
21000
3991
4991
5991
6991
7982
8973
9973
10973
11973
12964
13964
14964
15964
16955
17946
18946
19937
20928
21928
22928
239010
249010
259010
269010
278812
288812
298812
308713

Chance of precipitation in September

Any precipitation

Mykonos gets around 6 mm of rain over 1 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 3% and peaks near 7% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
10
21
31
41
51
61
71
81
91
102
112
122
132
142
153
163
173
184
194
204
215
225
235
246
256
266
276
286
296
307

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the muggy band about 44% of days. Sticky, muggy-or-worse air turns up on roughly 56% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
115185323
216195222
316205320
427215119
528225117
628235116
729245015
829245114
929255113
10210255112
11210265012
12211265011
13211274911
14212274810
15213284710
16214284610
17214284510
18215294410
19316294210
20317294110
2131930409
2232030389
2332130379
2442230368
2542331348
2642431337
2752531327
2852532316
2962632316
3062632305

Wind in September

Winds average 26 km/h in September.

Across September, daily wind ranges from about 25 km/h on the calmest days to 28 km/h at its breeziest. It stays fairly steady from day to day.

0102030151015202530
Wind speed (km/h)Feels
128breezy
228breezy
328breezy
428breezy
528breezy
627breezy
727breezy
827breezy
927breezy
1027breezy
1127breezy
1227breezy
1327breezy
1427breezy
1526breezy
1626breezy
1726breezy
1826breezy
1926breezy
2026breezy
2126breezy
2226breezy
2326breezy
2426breezy
2526breezy
2626breezy
2726breezy
2826breezy
2926breezy
3025breezy

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 48 min at the start of September to 11 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 66 minutes over September. Sunrise moves from 5:53 AM to 6:18 AM, and sunset from 6:44 PM to 5:58 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.85:536:44
212.85:546:42
312.85:556:41
412.75:566:39
512.75:566:38
612.65:576:36
712.65:586:34
812.65:596:33
912.56:006:31
1012.56:016:30
1112.46:026:28
1212.46:026:27
1312.46:036:25
1412.36:046:23
1512.36:056:22
1612.26:066:20
1712.26:076:19
1812.26:086:17
1912.16:086:15
2012.16:096:14
2112.06:106:12
2212.06:116:10
2311.96:126:09
2411.96:136:07
2511.96:146:06
2611.86:156:04
2711.86:156:03
2811.76:166:01
2911.76:175:59
3011.76:185:58

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.62 kWh/m².

For context, solar energy here swings from a low near 2.09 kWh/m² to a high of 7.88 kWh/m² in June across the year — September's 5.62 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.4Intense
26.3Intense
36.3Intense
46.2Intense
56.2Intense
66.1Intense
76.1Intense
86.0Intense
96.0Bright
105.9Bright
115.9Bright
125.8Bright
135.8Bright
145.7Bright
155.7Bright
165.6Bright
175.5Bright
185.5Bright
195.4Bright
205.4Bright
215.3Bright
225.3Bright
235.2Bright
245.2Bright
255.1Bright
265.0Bright
275.0Bright
284.9Bright
294.9Bright
304.8Bright
Planning a trip in September

Is September a good time to visit Mykonos?

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

9.3
Sightseeing
4th-best month of the year
7.4
Beach & pool
3rd-best month of the year

September is one of the better times to visit Mykonos for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Mykonos in September

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

In September, Mykonos sees daytime highs around 24°C and nights near 22°C. Worth packing: light clothes, sun protection and a windbreaker.

light clothessun protectiona windbreaker

Sea temperature near Mykonos in September

The nearest coast averages about 23°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in August at about 24°C and coldest in February near 16°C.

It's comfortable for a long swim from Jun 2 to Oct 31 — about 5 months when the water holds above 20°C.

15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan16Cool
Feb16Cool
Mar16Cool
Apr16Cool
May18Cool
Jun21Refreshing
Jul23Refreshing
Aug24Refreshing
Sep23Refreshing
Oct21Refreshing
Nov19Cool
Dec17Cool

UV index in Mykonos in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Mykonos peaks around June 23 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateVery highHighModerateJun 23UV 9Dec 23UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr8Very high
May7Very high
Jun9Very high
Jul9Very high
Aug9Very high
Sep7Very high
Oct5Moderate
Nov3Moderate
Dec2Low
Location & terrain

Where is Mykonos?

Mykonos sits at 37.4°N, 25.3°E, 0 m above sea level, in Greece. The nearest listed city is Naxos, 38 km away.

ParosOiaFiraChiosÇeşmeArtémidaKoropí

Topography around Mykonos

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

Within 3 km, the terrain around Mykonos has significant variations in elevation — a maximum elevation change of 265 m around an average of 55 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 377 m; within 80 km, large variations in elevation — a maximum elevation change of 996 m.

The land around Mykonos is covered by grassland (41%) and water (34%) within 3 km, water (86%) within 16 km, and water (90%) within 80 km.

3 km
265 m
16 km
377 m
80 km
996 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Naxos 38 km · Paros 43 km · Oia 109 km · Fira 114 km · Chios 125 km · Çeşme 130 km · Artémida 131 km · Koropí 138 km

Greece travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / F
230 V · 50 Hz
Prices
≈ 60% of US
price level, 2025
GDP per capita
$26,948
2025
Happiness
5.7 / 10
World Happiness, 2025
Safe drinking water
97%
of population, 2024
Homicide rate
0.8
per 100k, 2023
Road deaths
8.3
per 100k/yr, 2019
Income group
High
World Bank
English
High
EF EPI 592
Religion
other 3%Muslim 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 Mykonos (37.4453°, 25.3287°, elevation 0 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).