Climate and average weather in Mykonos

In Mykonos, the summers are humid, warm, dry, and clear and the winters are cool, windy, and partly cloudy.

Best: mid May to mid October

Over the course of the year, the temperature in Mykonos typically varies from 12°C to 25°C, and is rarely below 8°C or above 27°C. August is the hottest month of the year, while January is the coldest.

Based on the travel score, the best time of year to visit Mykonos for warm-weather activities is from mid May to mid October.

Hottest
Aug
25°
Coldest
Jan
12°
Wettest
Jan
80 mm
Driest
Jul
0 mm
Rain / yr
367 mm
54 wet days
Daylight
9.4–14.6 h
shortest–longest
Elevation
0 m
37.4°N
Clearest
Jul
2% cloud

Mykonos is town on Mykonos island, South Aegean.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Mykonos weather by month, at a glance

The whole year in one picture — sky, rain, humidity, temperature and travel score. Click any band to jump to its full chart.

Each stripe is one measure across the whole year, stacked so a single day reads top to bottom. The sky band runs overcast grey on top down to clear blue at the base — more blue means sunnier — followed by the rainfall curve, the humidity band, a temperature strip that tints each stretch of the year by how warm its average high is, and the travel-score line at the foot. Scan straight down any date to read that day across every measure at once; the score climbs highest around mid May to mid October.

Temperature through the year

Average highAverage lowShaded bands: 10–90% of days

Daily average highs and lows in Mykonos, from 1991–2020 of climate data. The shaded bands show the range most days fall in — 10th to 90th percentile.

The hot season lasts 3.5 months, from June 13 to September 27, with daily high temperatures above 22°C. The hottest month of the year in Mykonos is August, with an average high of 25°C and low of 24°C.

The cool season lasts 4.2 months, from December 5 to April 11, with daily high temperatures below 16°C. The coldest month of the year in Mykonos is January, with an average low of 12°C and high of 14°C.

Days typically run about 2°C warmer than nights year-round.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDec
Avg high (°C)Avg low (°C)
Jan1412
Feb1412
Mar1413
Apr1615
May1918
Jun2321
Jul2524
Aug2524
Sep2422
Oct2119
Nov1716
Dec1513

Average hourly temperature in Mykonos

A compact picture of the whole year, hour by hour: each column is a day, each row an hour, and the color is the modeled average temperature. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.

Read left to right for the day of the year and top to bottom for the hour of the day; the color is the modeled temperature, cool blues through to hot reds on the same scale as the other charts. A vertical slice is a single day's swing — coolest just before dawn, warmest in the mid-afternoon — while a horizontal slice follows one hour across the seasons. The darker overlay marks night and the lighter one the twilight around sunrise and sunset. Colors run warmest on August afternoons, near 25°C, and coldest before dawn in January, near 12°C.

JanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AM

Mykonos weather by month

Every month at a glance. Click a month for its detailed page.

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

Chance of rain

How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.

Mykonos gets about 367 mm of precipitation a year. On a typical day the chance of rain is mostly dry, but that rises and falls sharply with the seasons.

The wetter season lasts 5.6 months, from around Oct 23 to Apr 9, peaking in January at about 36% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Jul 5.

January is the wettest month by volume, with 80 mm over about 11 wet days; July is the driest, with 0 mm.

0%10%20%30%40%50%JanFebMarAprMayJunJulAugSepOctNovDecwetterdrierwettermostly drysome rainoften wetvery wetJan 4 · 36%Jul 5 · 0%
Rain on a day (%)Rain days
Jan3611
Feb329
Mar227
Apr124
May52
Jun20
Jul00
Aug00
Sep31
Oct124
Nov216
Dec3310

Monthly rainfall

Over a full year, Mykonos collects about 367 mm of rain across 54 wet days — roughly 31 mm in an average month.

It doesn’t fall evenly. January is the wettest month with 80 mm, while July is the driest at just 0 mm. The three wettest months alone bring about 58% of the year’s total.

0255075100JanFebMarAprMayJunJulAugSepOctNovDec8064461982006314368
Rainfall (mm)Rain days
Jan8011
Feb649
Mar467
Apr194
May82
Jun20
Jul00
Aug00
Sep61
Oct314
Nov436
Dec6810

Clouds and sunshine

ClearMostly clearPartly cloudyMostly cloudyOvercast

How often the daytime sky is clear, partly cloudy or overcast.

In Mykonos, the average share of the sky covered by clouds shows significant seasonal variation over the course of the year.

The clearer part of the year begins around April 28 and lasts for 5.7 months, ending around October 19. The clearest month is July, when the sky is clear, mostly clear, or partly cloudy 100% of the time on average.

The cloudier part of the year begins around October 20 and lasts for 6.2 months, ending around April 27. The cloudiest month is January, when it is overcast or mostly cloudy 48% of the time.

0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%JanFebMarAprMayJunJulAugSepOctNovDecAug 7 · 100%Jan 9 · 51%clearmostly clearpartly cloudymostly cloudyovercastcloudierclearercloudier
Clearer (%)Cloudier (%)
Jan5248
Feb6040
Mar6931
Apr7426
May8317
Jun964
Jul1000
Aug1000
Sep946
Oct7921
Nov6436
Dec5446

Daylight, sunrise and sunset

DaylightNight

Hours of daylight through the year, with sunrise and sunset times.

The gold band is daylight — sunrise runs along its lower edge, sunset along the upper — so it widens toward summer and pinches toward winter, with night the dark area above and below. The longest day, around June 14, brings about 14 h 36 min of light; the shortest, around December 14, only 9 h 24 min — a swing of roughly 5 h 12 min.

12 AM4 AM8 AM12 PM4 PM8 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDec
Daylight (h)Sunrise (AM)Sunset (PM)
Jan9.77:375:18
Feb10.67:165:50
Mar11.76:376:19
Apr12.95:506:48
May14.05:157:15
Jun14.55:027:36
Jul14.35:147:35
Aug13.45:397:06
Sep12.36:066:20
Oct11.06:335:34
Nov10.07:055:02
Dec9.57:324:58

Sunny days

How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.

Mykonos averages about 20 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 10 and 30 days.

The sunnier stretch runs 5.6 months, from around Apr 29 to Oct 15. The sunniest month is July, with roughly 30 sunny days (brilliant).

The greyest month is January, down near 10 sunny days — about 65% fewer than the July peak.

05101520253035JanFebMarAprMayJunJulAugSepOctNovDecgreyersunniergreyergloomymixedbrightbrilliantJul 2930 daysJan 610 days
Sunny daysSky
Jan11Mixed
Feb12Mixed
Mar17Bright
Apr18Bright
May22Bright
Jun28Brilliant
Jul31Brilliant
Aug31Brilliant
Sep27Brilliant
Oct20Bright
Nov15Mixed
Dec11Mixed

Humidity comfort

DryComfortableHumidMuggyOppressiveMiserable

Share of days at each humidity comfort level, based on the dew point — the measure that tracks how muggy it actually feels.

Humidity comfort is graded by the dew point — the temperature at which the air would be fully saturated — because it tracks how muggy it actually feels far better than relative humidity does. A low dew point feels dry and crisp; a high one feels sticky and oppressive no matter the reading on a humidity gauge.

In Mykonos, how humid it feels changes dramatically over the year.

The more humid part of the year lasts 5.3 months, from around May 16 to October 23. The muggiest month is July, when the air feels humid, muggy or worse about 100% of the time.

The most comfortable stretch runs from around October 24 to May 15, and December is the most comfortable month — the air is dry or comfortable 98% of the time.

0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecDec 28 · 100%Jul 12 · 0%oppressivecomfortablehumiddrymuggycomfortablehumidcomfortable
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
Jan955000
Feb955000
Mar8911000
Apr6534200
May17413840
Jun1741466
Jul00146026
Aug0195832
Sep315274412
Oct212931171
Nov55271620
Dec8514200

Wind

Average wind speed through the year, banded into plain-language speed zones so a number reads as 'breezy' or 'calm' without knowing the scale.

This is the average sustained wind speed at the standard 10 metres above open ground — the steady flow a weather station reports, not the sharper gusts that come and go, which can run half again as fast. It's the number that says whether a place is generally breezy or calm.

Across the year, average wind speed in Mykonos is typically breezy, near 27 km/h, and varies moderately with the seasons.

The windier part of the year lasts 2.3 months, from around Jul 2 to Sep 10. The windiest month is August, averaging about 30 km/h (windy).

The calmer part of the year runs from around Mar 27 to Jul 1, with May the calmest month at about 21 km/h.

05101520253035JanFebMarAprMayJunJulAugSepOctNovDeccalmerwindiercalmercalmlight breezebreezywindyAug 14 · 30 km/hMay 24 · 21 km/h
Wind speed (km/h)Feels
Jan29windy
Feb29windy
Mar27breezy
Apr24breezy
May21breezy
Jun24breezy
Jul29windy
Aug30windy
Sep27breezy
Oct27breezy
Nov27breezy
Dec28breezy

Best time to visit Mykonos

TravelBeach/poolTemperatureCloudsPrecipitation

To characterize how pleasant the weather is in Mykonos throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.

Around early October, Mykonos is still near the tail of its best-weather window — great conditions with the peak-season crowds already thinning.

Inferred from the travel-score curve; month-by-month visitor numbers are a planned addition.

The travel score favors clear, rainless days with daytime highs between 18°C and 28°C. Based on this score, the best time of year to visit Mykonos for general outdoor tourist activities is from mid May to mid October, with a peak score in the first week of July.

0246810JanFebMarAprMayJunJulAugSepOctNovDecbest timetravel scoretemperaturecloudsprecipitationJul 1 · 9.8

The travel score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

Travel score (0–10)Rating
Jan3.8fair
Feb4.1fair
Mar4.8fair
Apr6.2good
May7.9ideal
Jun9.3ideal
Jul9.7ideal
Aug9.6ideal
Sep9.3ideal
Oct7.9ideal
Nov6.4good
Dec4.5fair

The beach/pool score favors clear, rainless days with daytime highs between 24°C and 34°C. Based on this score, the best time of year to visit Mykonos for hot-weather activities is from mid June to late September, with a peak score in the second week of August.

024681012JanFebMarAprMayJunJulAugSepOctNovDecbest timebeach/pool scoretemperaturecloudsprecipitationAug 8 · 8.7

The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

What to pack for Mykonos, by month

EssentialRecommendedOptional

Month by month, what's worth putting in the bag — from the temperature range, rain chance, sun and wind. Tap a month for a quick packing note.

For a warm-season trip around August (highs near 25°C), the essentials are light clothes, sun protection and a windbreaker. In the cold season around January (highs near 14°C), pack a warm layer, rain gear and a windbreaker.

Light clothing
Warm layer
Winter coat
Rain gear
Sun protection
Windbreaker

In August, Mykonos sees daytime highs around 25°C and nights near 24°C. Pack sun protection and a windbreaker. Worth having: light clothes.

Sea temperature near Mykonos

Average ocean temperature at the nearest coast, month by month, banded into swim-comfort zones — the other half of the beach question.

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 (midday) in Mykonos by month

LowModerateHighVery highExtreme

Clear-sky midday UV index through the year, shaded by the WHO exposure levels — how much sun protection each month calls for.

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

Average hourly UV index in Mykonos

LowModerateHighVery highExtreme

Modeled clear-sky UV for every hour of every day — when in the day sun protection actually matters.

The whole year hour by hour: each column is a day, each row an hour, and the color is the modeled clear-sky UV index — the midday peak scaled down as the sun sits lower in the sky. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.

UV falls off far faster than brightness as the sun drops, so even in June the burn window is concentrated in the middle of the day: about 8.5 hours a day reach index 3 (protection recommended), and 5.5 hours reach 6 or more. Mornings and late afternoons stay comparatively gentle year round.

JanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AM
UV ≥ 3 (h/day)UV ≥ 6 (h/day)
Jan00
Feb00
Mar4.50
Apr73.5
May7.54
Jun8.55.5
Jul85.5
Aug7.54.5
Sep6.53.5
Oct50
Nov10
Dec00
Almanac & agriculture

Growing season

Chance of a frost-free dayFrost-free year round

Mykonos is frost-free year round — even the coldest nights rarely reach freezing, so there is no start or end to the growing season.

0%25%50%75%100%JanFebMarAprMayJunJulAugSepOctNovDecfrost-free year round
Frost-free chance (%)Frost nights
Jan1000
Feb1000
Mar1000
Apr1000
May1000
Jun1000
Jul1000
Aug1000
Sep1000
Oct1000
Nov1000
Dec1000

Growing degree days

Degree days (base 10°C)Frost-free shaded

Growing degree days tally heat above 10°C: each day adds however many degrees its average temperature runs over that threshold, and cold days add nothing. Mykonos banks about 2,950 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around August.

01,0002,0003,000JanFebMarAprMayJunJulAugSepOctNovDec
Growing degree days (°C·days)
Jan79
Feb73
Mar109
Apr160
May261
Jun363
Jul441
Aug453
Sep385
Oct304
Nov200
Dec121

Solar energy

Average daily shortwave solar energy reaching the ground, banded into brightness zones so the number means something at a glance.

Solar energy is how much sunlight actually reaches the ground each day, measured in kilowatt-hours per square metre (kWh/m²) — the combined effect of how long the sun is up, how high it climbs, and how much cloud gets in the way. It's the raw fuel a solar panel has to work with: for scale, 1 kWh/m² a day is dim and wintry, while 7+ is desert-bright.

Mykonos receives about 5.1 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 2.1 and 8.0 kWh/m².

The brighter stretch of the year lasts 6.1 months, from around Mar 22 to Sep 24. The brightest month is June, averaging about 7.8 kWh/m² (intense).

The dimmest month is December, down near 2.1 kWh/m² — roughly 73% less than the June peak.

0123456789JanFebMarAprMayJunJulAugSepOctNovDecdimmerbrighterdimmerdimmoderatebrightintenseJun 278.0 kWhDec 212.1 kWh
Solar energy (kWh/m²)Level
Jan2.5Moderate
Feb3.4Moderate
Mar4.9Bright
Apr6.2Intense
May7.2Intense
Jun7.9Intense
Jul7.8Intense
Aug7.0Intense
Sep5.6Bright
Oct4.0Bright
Nov2.7Moderate
Dec2.1Moderate

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
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).