Mykonos Weather in September

🇬🇷 Greece

24°C

High

21°C

Low

Rain Days

11h

Sunshine

65%

Humidity

Europe › 🇬🇷 Greece › Mykonos

Updated: March 2026

Is September a Good Time to Visit Mykonos?

8/10

Excellent

September is a excellent time to visit Mykonos (8/10). With 11 daily sunshine hours and only 1 rain days, this month delivers genuinely reliable outdoor conditions, ranking it 6th sunniest of the year in Mykonos. Beach and outdoor-focused visitors will find September ideal, though hotel prices reflect demand and popular sites get crowded by mid-morning. October offers a similar profile at lower hotel rates if dates are flexible. The main practical note: Mykonos's popular sites are busiest between 10am and 3pm regardless of season. Arriving at opening time or after 4pm makes a significant difference to the experience. Planning tips: book accommodation at least 6-8 weeks ahead, as popular hotels fill quickly during September. Purchasing skip-the-line tickets for major attractions in advance saves meaningful time. If you have flexibility, arriving a few days before or after peak weekends reduces both crowds and prices noticeably.

vs August:26°C avg high

Step off the plane in Mykonos in September and the air meets you at around 24°C, a temperature that feels genuinely welcoming after a long flight. By the time evening arrives and temperatures settle near 21°C, the city takes on a different character entirely. With 11 hours of daylight sun on offer, September gives you the raw material for a genuinely memorable trip.

24°C

Avg High

21°C

Avg Low

1 days

Rain Days

11h

Sunshine

65%

Humidity

Temperature in Mykonos in September

The narrow 3°C gap between daytime and overnight temperatures, characteristic of coastal cities with maritime moderation, means a single mid-layer works across the whole day. Humidity averages 65%, which is comfortable for most visitors. On warmer days, lighter fabrics help with the mild stickiness in the afternoon. UV index averages 6 this month, classed as moderate. Sunscreen is a sensible precaution for extended outdoor time, particularly at midday. Average wind speeds of 32 km/h add a meaningful windchill factor, making the 24°C temperature feel cooler than it reads. In Fahrenheit: 75°F average high, 70°F overnight low. Data sourced from Open-Meteo ERA5 climate reanalysis (1991–2020 normals).

Temperature in September

Monthly Precipitation (mm)

What to Wear in Mykonos in September

Morning21°CBefore the day warms up

Afternoon24°CPeak daytime temperature

Evening24°CAfter sunset cools down

Packing for Mykonos in September means dressing for 24°C days and 21°C evenings. A light cotton tee with a casual overshirt works well at 24°C, the overshirt doubles as a layer for air-conditioned venues. Evening temperatures settle at 21°C, a modest 3°C drop that a light cardigan or denim jacket covers. European cobblestones reward low-profile walking shoes over flip-flops or heels, with cushioned trainers or leather walking shoes being the practical choice.

💡

Local tip: Many of Mykonos's museums and galleries maintain cool interior temperatures regardless of outdoor conditions. A compact layer in your daypack lets you move between warm streets and chilled exhibition halls without discomfort.

Events in Mykonos in September

September has no major festivals or public holidays in Mykonos, which is one of its practical advantages for independent travellers. Attractions run at lower capacity than during peak event periods, queues are shorter, and accommodation is easier to find without needing to book many months in advance. Local restaurants, markets, and transport operate at a relaxed pace, making this an ideal time for visitors who prefer a more authentic, unhurried experience of everyday city life rather than large crowds drawn in by a single major headline event.

What to Pack for Mykonos in September

Based on 24°C average highs and 1 rainy days

Light layers for morning and evening
Breathable T-shirts and comfortable trousers
UV-protective sunglasses
SPF 30+ sunscreen
Comfortable walking shoes (a second pair lets the first air out overnight)
Universal travel adapter
Small day pack for city exploration
Reusable water bottle

Best Activities in Mykonos in September

Explore outdoor markets and street food stallsMid-morning (10am-12pm)At 24°C, the temperature is ideal for extended walking without overheating
Guided walking tour of the historic centreMorning or late afternoonComfortable temperatures allow several hours on foot without fatigue
Visit rooftop viewpoints and observation decksGolden hour (1 hour before sunset)Warm clear evenings provide exceptional visibility for panoramic photography
Day trip to the surrounding countryside or coastFull day (depart by 8am)September is reliably dry enough for rural day trips without weather risk
Afternoon in a world-class museum or galleryAfternoon (2-5pm)Pairs well with outdoor morning activities and provides a mid-day rest from sightseeing
Coffee-house or traditional cafe culture experienceMid-morning or post-lunchA cultural ritual in this region that rewards slow appreciation regardless of weather
Evening live music, theatre, or opera performanceEvening shows typically at 7-9pmConsistent evening temperatures make getting to and from evening venues comfortable
Visit the main botanical garden or city park at seasonal peakYear-round; best light in morningSeptember brings distinct seasonal changes to public green spaces worth exploring
Try the seasonal farmer's market for local produce and street foodSaturday morning markets typically 8am-1pmSeptember seasonal produce is at peak availability, offering dishes not found at other times of year

Why is Mykonos mild in September?

Mykonos's September weather is dominated by the Azores High, a semi-permanent subtropical anticyclone that blocks Atlantic rain systems from reaching the Mediterranean. As a result, September delivers reliably sunny, dry conditions with temperatures averaging 24°C. The sea moderates extreme heat and keeps overnight lows around 21°C, making the city noticeably more comfortable than inland Mediterranean destinations. Climate data: Open-Meteo ERA5 (1991–2020).

Sunshine Hours

The average number of hours per day with direct sunlight. Calculated from satellite measurements. Days with more than 7 hours of sunshine are ideal for outdoor activities. Under 3 hours means overcast conditions dominate.

UV Index

A scale from 0-11+ measuring ultraviolet radiation intensity. UV 0-2: Minimal risk. UV 3-5: Moderate -- wear sunscreen. UV 6-7: High -- hat and SPF 30+ essential. UV 8-10: Very High -- limit midday exposure. UV 11+: Extreme -- seek shade between 10am-4pm.

Rain Days

A rain day is counted when precipitation exceeds 0.1mm. This threshold captures even light drizzle. Unlike total rainfall in mm, rain days tells you how often you might need an umbrella, which is useful for planning outdoor activities.

Humidity

Relative humidity as a percentage. Below 40%: Dry -- skin and throat may feel parched. 40-60%: Comfortable -- ideal for most people. 60-80%: Sticky -- light, breathable fabrics recommended. Above 80%: Muggy -- heat feels more intense; quick-dry clothing is essential.

Frequently Asked Questions: Mykonos in September

In September, Mykonos experiences average highs of 24°C (75°F) and lows of 21°C (70°F). Expect around 1 rainy days and 11 hours of sunshine per day, with humidity averaging 65%. The 3°C gap between daytime and overnight temperatures is worth planning around: light layers work for most visitors during the day, but an overshirt or cardigan handles the cooler evenings. UV index averages 6, so sun protection is advisable on clear days.

Mykonos typically sees 1 rainy days in September, with total precipitation of around 6mm. This makes September one of the drier months of the year, and a reliable window for outdoor sightseeing and day trips. Rain showers tend to be brief when they do occur. For context, the driest month in Mykonos typically sees 4-6 fewer rain days than September.

Pack light layers, a light jacket for evenings, comfortable walking shoes, and sunscreen for Mykonos in September. Daytime temperatures of 24°C are pleasant, but the evening drop to 21°C means a jacket is essential if you plan to be out after dark. Rain is infrequent with only 1 wet days, so a light rain layer is optional. Comfortable walking shoes are a priority given the amount of ground most visitors cover.

Yes, September is an excellent time to visit Mykonos. With 11 daily sunshine hours and only 1 rainy days, conditions are ideal for sightseeing and outdoor activities. Temperatures averaging 24°C during the day are comfortable for long walks and outdoor dining. This is peak travel season, so booking accommodation in advance and arriving at popular attractions early in the morning helps avoid the busiest periods.

The average high temperature in Mykonos in September is 24°C (75°F), and the average low is 21°C (70°F). The mean daily temperature is approximately 23°C (73°F). The day-to-night range of 3°C is narrow, typical of coastal or maritime cities. These are 30-year climate normals based on the 1991 to 2020 reference period; individual years will vary, particularly in transitional months like spring and autumn.

The best month to visit Mykonos is generally June. June offers the most sunshine at 13 hours per day and only 0 rainy days. Average temperatures reach 24°C, making it comfortable for sightseeing, outdoor dining, and exploring the city. If your travel dates are flexible, planning your trip around June gives you the best chance of dry, bright weather.

September is shoulder or low season in Mykonos, meaning fewer tourists and generally lower prices than peak months. With 11 sunshine hours and 1 rainy days, the weather is less of a draw for mass tourism. This is an advantage for travellers who prefer a quieter, more relaxed experience with shorter queues and easier accommodation availability.

In September, Mykonos suits a range of activities thanks to mild temperatures around 24°C. With few rainy days, outdoor activities are highly recommended. Top options include exploring historic neighbourhoods, visiting museums and galleries, local food markets, and day trips to surrounding areas. With 11 hours of sunshine, parks and waterfront walks are particularly enjoyable.

September ranks 6th sunniest of the year in Mykonos, with an average 11 daily sunshine hours. The driest months are June, July, and August. July is the hottest month (26°C avg high); January is the coolest (13°C). From here, temperatures fall 3°C into October. Compared to last month (August: 26°C high, 0 rain days), September is cooler and wetter. September sits in the middle of the annual sunshine ranking for Mykonos, offering a reasonable balance of good weather and manageable crowds.

Year-Round Climate

Month	High	Low	Rain Days	Sun	Details
January	13°C	10°C	11	8h	View
February	13°C	10°C	9	8h	View
March	15°C	12°C	7	10h	View
April	17°C	14°C	4	11h	View
May	20°C	17°C	2	12h	View
June	24°C	21°C	0	13h	View
July	26°C	23°C	0	13h	View
August	26°C	24°C	0	13h	View
September	24°C	21°C	1	11h	View
October	21°C	18°C	4	10h	View
November	18°C	15°C	6	8h	View
December	14°C	12°C	10	7h	View

Other Months in Mykonos

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Plan Your Trip to Mykonos

Best Time to Visit Mykonos Mykonos vs Athens in September Mykonos vs Santorini in September

Nearby Destinations with Similar Weather

These cities are within 500 km and experience broadly comparable weather conditions during the same calendar month, making them practical standalone alternatives or worthwhile additions to a longer regional itinerary.

Athens🇬🇷 Greece153 km away

28°C19°C low

Santorini🇬🇷 Greece118 km away

25°C22°C low

Data Sources for Mykonos

Mykonos on Wikipedia Open-Meteo Climate API NOAA National Centers UK Met Office WMO GeoNames

Climate normals represent 30-year averages (1991-2020). Individual years may vary.