Gönen weather in September

In September, Gönen sees average daytime highs of 26°C and overnight lows near 16°C, with 34 mm of rain across 4.9 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 10th-wettest month of the year here.

Highs ease over the month, from about 28°C in the first days to 25°C by the end. The sky is clear or mostly clear about 65% of the time in September, and the air most often feels comfortable.

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 Gönen's 4th-clearest and 6th-windiest month. For the whole year in context, see Gönen's year-round climate.

Daytime high
26°
4th warmest
Overnight low
16°
9th coldest
Rainfall
34 mm
4.9 wet days
Daylight
12 h 18 min
5:56 AM – 6:12 PM
Cloud cover
32%
4th clearest
Wind
11 km/h
6th windiest
Solar energy
4.8 kWh/m²
Travel score
7.9
out of 10

Gönen is district of Balıkesir, northwestern Turkey.

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 28°C in the first days to 25°C by the end.

A typical September day in Gönen reaches about 26°C in the afternoon and slips back to 16°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 31°C. Set against its neighbours, September runs about 4°C cooler than August and about 5°C warmer than October.

10°20°30°151015202530
Avg high (°C)Avg low (°C)
12818
22818
32817
42817
52817
62817
72717
82717
92717
102716
112716
122716
132716
142716
152616
162616
172615
182615
192615
202615
212615
222515
232515
242514
252514
262514
272514
282514
292414
302414

How September really feels in Gönen

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.

Gönen weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 8811.93.69.51.8
Feb11° / 8111.33.410.42.3
Mar14° / 7711.21.411.73.7
Apr18° / 568.80.1136.0
May23° / 12°507.7014.27.4
Jun28° / 16°396.7014.87.1
Jul30° / 19°173.1014.66.5
Aug30° / 20°123013.66.5
Sep26° / 16°344.9012.37.9
Oct21° / 12°668010.97.0
Nov16° / 6580.29.85.0
Dec11° / 9712.22.59.22.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 65% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 15% of September, with mostly cloudy or overcast conditions the remaining 19%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
19010
28911
38812
48812
58812
68713
78713
88713
98614
108614
118515
128416
138416
148317
158218
168119
178119
187921
197822
207822
217723
227525
237525
247426
257426
267228
277228
287129
297129
306931

Chance of precipitation in September

Any precipitation

Gönen gets around 34 mm of rain over 4.9 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 16% and peaks near 20% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%151015202530
Rain chance (%)
112
212
312
412
513
613
713
814
914
1014
1114
1214
1315
1415
1515
1616
1716
1816
1917
2017
2117
2218
2318
2419
2519
2619
2719
2819
2920
3020

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the comfortable band about 35% of days. Sticky, muggy-or-worse air turns up on roughly 5% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
119313614
220313513
322313512
424313411
526313310
62731329
72931329
83032318
93032307
103132306
113233306
123233295
133334295
143334284
153435274
163435274
173536263
183637243
193637233
203738223
213939202
224039192
234139182
244239172
254439161
264539151
274639141
284839131
294938121
304938121

Wind in September

Winds average 11 km/h in September.

Across September, daily wind ranges from about 10 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
112light breeze
212calm
312calm
412calm
512calm
612calm
712calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm

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 5:41 AM to 6:10 AM, and sunset from 6:37 PM to 5:48 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.95:416:37
212.95:426:35
312.85:436:34
412.85:446:32
512.85:456:30
612.75:466:29
712.75:476:27
812.65:486:25
912.65:496:24
1012.55:506:22
1112.55:516:20
1212.45:526:18
1312.45:536:17
1412.45:546:15
1512.35:556:13
1612.35:566:12
1712.25:576:10
1812.25:586:08
1912.15:596:06
2012.16:006:05
2112.06:016:03
2212.06:026:01
2311.96:035:59
2411.96:045:58
2511.96:055:56
2611.86:065:54
2711.86:075:53
2811.76:085:51
2911.76:095:49
3011.66:105:48

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.8 kWh/m².

For context, solar energy here swings from a low near 1.52 kWh/m² to a high of 7.14 kWh/m² in July across the year — September's 4.8 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.6Bright
25.6Bright
35.5Bright
45.5Bright
55.4Bright
65.4Bright
75.3Bright
85.3Bright
95.2Bright
105.1Bright
115.1Bright
125.0Bright
135.0Bright
144.9Bright
154.8Bright
164.8Bright
174.7Bright
184.7Bright
194.6Bright
204.5Bright
214.5Bright
224.4Bright
234.4Bright
244.3Bright
254.3Bright
264.2Bright
274.2Bright
284.1Bright
294.0Bright
304.0Moderate
Planning a trip in September

Hazard calendar for Gönen

In seasonPeak

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

Gönen's rainy season runs October–May, 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 Gönen?

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

7.9
Sightseeing
1st-best month of the year
7.7
Beach & pool
4th-best month of the year

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

What to pack for Gönen in September

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

In September, Gönen sees daytime highs around 26°C and nights near 16°C. Worth packing: light clothes and sun protection. About 5 days see rain.

light clothessun protection

Sea temperature near Gönen 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 at the nearest coast (about 30 km away) is warmest in August at about 25°C and coldest in February near 9°C.

It's comfortable for a long swim from Jun 4 to Oct 9 — about 4.2 months when the water holds above 20°C.

10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan9Bracing
Feb9Bracing
Mar10Bracing
Apr12Bracing
May17Cool
Jun22Refreshing
Jul24Warm
Aug25Warm
Sep23Refreshing
Oct19Cool
Nov15Cool
Dec12Bracing

UV index in Gönen 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 Gönen peaks around August 10 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateVery highModerateLowAug 10UV 9Dec 22UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr8Very high
May7Very high
Jun9Very high
Jul9Very high
Aug9Very high
Sep7High
Oct4Moderate
Nov2Moderate
Dec2Low

Air quality in Gönen 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 Gönen is worst in March — around 17 µg/m³ PM2.5 (moderate), about 1.7× the cleanest month (July, 10 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodMar 2317 µg/m³Jul 2010 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb14Moderate
Mar17Moderate
Apr17Moderate
May17Moderate
Jun13Moderate
Jul10Good
Aug11Good
Sep11Good
Oct11Good
Nov12Moderate
Dec10Good
Location & terrain

Where is Gönen?

Gönen sits at 40.1°N, 27.7°E, 40 m above sea level, in Turkey. The nearest listed city is Erdek, 35 km away.

Topography around Gönen

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

Within 3 km, the terrain around Gönen has only modest variations in elevation — a maximum elevation change of 75 m around an average of 43 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 896 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,813 m.

The land around Gönen is covered by cropland (57%) within 3 km, trees (48%) and cropland (33%) within 16 km, and trees (42%), water (24%) and cropland (21%) within 80 km.

3 km
75 m
16 km
896 m
80 km
1,813 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Erdek 35 km · Biga 38 km · Bandırma 39 km · Susurluk 48 km · Çan 52 km · Balıkesir 54 km · Karacabey 61 km · Mustafakemalpaşa 65 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 Gönen (40.1049°, 27.654°, elevation 40 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).