Ayvalık weather in September

In September, Ayvalık sees average daytime highs of 24°C and overnight lows near 20°C, with 26 mm of rain across 2.8 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 9th-wettest month of the year here.

Highs ease over the month, from about 26°C in the first days to 23°C by the end. The sky is clear or mostly clear about 85% of the time in September, and the air most often feels humid.

Daylight stretches from about 12 h 54 min at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Ayvalık's 3rd-clearest and 9th-windiest month. For the whole year in context, see Ayvalık's year-round climate.

Daytime high
24°
4th warmest
Overnight low
20°
9th coldest
Rainfall
26 mm
2.8 wet days
Daylight
12 h 18 min
6:00 AM – 6:15 PM
Cloud cover
17%
3rd clearest
Wind
17 km/h
9th windiest
Solar energy
5.37 kWh/m²
Travel score
8.9
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 26°C in the first days to 23°C by the end.

A typical September day in Ayvalık reaches about 24°C in the afternoon and slips back to 20°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 26°C. Set against its neighbours, September runs about 3°C cooler than August and about 4°C warmer than October.

15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12621
22621
32621
42521
52521
62521
72521
82521
92521
102521
112520
122520
132420
142420
152420
162420
172420
182420
192420
202420
212319
222319
232319
242319
252319
262319
272319
282319
292319
302218

Ayvalık weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan11° / 13711.49.52.7
Feb12° / 12210.810.52.9
Mar13° / 849.111.74.0
Apr16° / 12°647.2135.8
May21° / 16°343.914.17.8
Jun25° / 20°101.614.79.0
Jul27° / 23°10.214.59.1
Aug27° / 23°20.213.59.1
Sep24° / 20°262.812.38.9
Oct20° / 17°785.6117.5
Nov16° / 13°1228.89.85.4
Dec12° / 14512.39.33.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 85% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 7% of September, with mostly cloudy or overcast conditions the remaining 8%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1991
2973
3973
4973
5973
6973
7973
8964
9955
10955
11955
12955
13946
14937
15937
16937
17928
18928
19919
209010
219010
228911
238911
248812
258713
268713
278713
288614
298614
308614

Chance of precipitation in September

Any precipitation

Ayvalık gets around 26 mm of rain over 2.8 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 9% and peaks near 14% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%151015202530
Rain chance (%)
14
24
35
45
55
66
76
86
97
107
117
127
138
148
158
169
179
189
1910
2010
2111
2211
2312
2412
2513
2613
2713
2814
2914
3014

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the humid band about 38% of days. Sticky, muggy-or-worse air turns up on roughly 20% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
171942311
272042301
382141281
492241261
5102341251
6102441241
7112541231
8112641220
9122641210
10122740210
11122740200
12132740200
13132840190
14142840190
15142839190
16152839190
17152838180
18162838180
19172837180
20182837180
21192836170
22202836170
23212835160
24222835150
25232834150
26242934140
27252933130
28252933130
29262933120
30262933110

Wind in September

Winds average 17 km/h in September.

Across September, daily wind ranges from about 17 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
118light breeze
218light breeze
318light breeze
418light breeze
518light breeze
618light breeze
718light breeze
817light breeze
917light breeze
1017light breeze
1117light breeze
1217light breeze
1317light breeze
1417light breeze
1517light breeze
1617light breeze
1717light breeze
1817light breeze
1917light breeze
2017light breeze
2117light breeze
2217light breeze
2317light breeze
2417light breeze
2517light breeze
2617light breeze
2717light breeze
2817light breeze
2917light breeze
3017light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 54 min at the start of September to 11 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 78 minutes over September. Sunrise moves from 5:46 AM to 6:13 AM, and sunset from 6:40 PM to 5:52 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.95:466:40
212.95:476:38
312.85:486:37
412.85:496:35
512.75:506:34
612.75:516:32
712.65:516:30
812.65:526:29
912.65:536:27
1012.55:546:25
1112.55:556:24
1212.45:566:22
1312.45:576:20
1412.35:586:19
1512.35:596:17
1612.36:006:15
1712.26:016:13
1812.26:026:12
1912.16:036:10
2012.16:046:08
2112.06:056:07
2212.06:066:05
2311.96:076:03
2411.96:086:02
2511.96:096:00
2611.86:105:58
2711.86:105:57
2811.76:115:55
2911.76:125:53
3011.66:135:52

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.37 kWh/m².

For context, solar energy here swings from a low near 1.84 kWh/m² to a high of 7.61 kWh/m² in July across the year — September's 5.37 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.2Intense
26.1Intense
36.1Intense
46.0Intense
56.0Bright
65.9Bright
75.8Bright
85.8Bright
95.7Bright
105.7Bright
115.6Bright
125.6Bright
135.5Bright
145.5Bright
155.4Bright
165.4Bright
175.3Bright
185.3Bright
195.2Bright
205.1Bright
215.1Bright
225.0Bright
235.0Bright
244.9Bright
254.9Bright
264.8Bright
274.8Bright
284.7Bright
294.7Bright
304.6Bright
Planning a trip in September

Hazard calendar for Ayvalık

In seasonPeak

None of Ayvalık's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Ayvalık's rainy season runs October–March, when most of the year's rain falls.

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

Is September a good time to visit Ayvalık?

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

8.9
Sightseeing
4th-best month of the year
7.4
Beach & pool
4th-best month of the year

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

What to pack for Ayvalık in September

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

In September, Ayvalık sees daytime highs around 24°C and nights near 20°C. Worth packing: light clothes and sun protection.

light clothessun protection

Sea temperature near Ayvalık in September

The nearest coast averages about 22°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 23°C and coldest in February near 15°C.

It's comfortable for a long swim from May 31 to Oct 20 — about 4.7 months when the water holds above 20°C.

15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan15Cool
Feb15Bracing
Mar15Cool
Apr16Cool
May19Cool
Jun22Refreshing
Jul23Refreshing
Aug23Refreshing
Sep22Refreshing
Oct20Refreshing
Nov18Cool
Dec17Cool

UV index in Ayvalık 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 Ayvalık peaks around August 10 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 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateVery highModerateLowAug 10UV 9Dec 23UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr8Very high
May7Very high
Jun9Very high
Jul9Very high
Aug9Very high
Sep7High
Oct4Moderate
Nov3Moderate
Dec2Low

Air quality in Ayvalık in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Ayvalık is worst in March — around 18 µg/m³ PM2.5 (moderate), about 1.7× the cleanest month (December, 11 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateGoodMar 2117 µg/m³Dec 1811 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb14Moderate
Mar18Moderate
Apr17Moderate
May17Moderate
Jun15Moderate
Jul12Moderate
Aug13Moderate
Sep12Good
Oct12Good
Nov13Moderate
Dec11Good
Location & terrain

Where is Ayvalık?

Ayvalık sits at 39.3°N, 26.7°E, 8 m above sea level, in Turkey. The nearest listed city is Mytilene, 26 km away.

Topography around Ayvalık

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

Within 3 km, the terrain around Ayvalık has only modest variations in elevation — a maximum elevation change of 121 m around an average of 20 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 429 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,759 m.

The land around Ayvalık is covered by water (32%) and grassland (24%) within 3 km, water (60%) and trees (21%) within 16 km, and trees (39%) and water (35%) within 80 km.

3 km
121 m
16 km
429 m
80 km
1,759 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Mytilene 26 km · Burhaniye 31 km · Edremit 42 km · Bergama 47 km · Ezine 60 km · Aliağa 63 km · Foça 72 km · Soma 80 km

Turkey travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / F
230 V · 50 Hz
Prices
≈ 41% of US
price level, 2025
GDP per capita
$18,599
2025
Happiness
5.3 / 10
World Happiness, 2025
Homicide rate
3.2
per 100k, 2023
Road deaths
6.7
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Low
EF EPI 488
Religion
Muslim 100%other 0%

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 Ayvalık (39.3193°, 26.6934°, elevation 8 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. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).