Adapazarı weather in September

In September, Adapazarı sees average daytime highs of 25°C and overnight lows near 14°C, with 56 mm of rain across 8 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 26°C in the first days to 23°C by the end. The sky is clear or mostly clear about 51% of the time in September, and the air most often feels comfortable.

Daylight stretches from about 13 hours at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Adapazarı's 4th-clearest and 9th-windiest month. For the whole year in context, see Adapazarı's year-round climate.

Daytime high
25°
4th warmest
Overnight low
14°
9th coldest
Rainfall
56 mm
8 wet days
Daylight
12 h 18 min
5:45 AM – 6:01 PM
Cloud cover
42%
4th clearest
Wind
6 km/h
9th windiest
Solar energy
4.54 kWh/m²
Travel score
7.5
out of 10

Adapazarı is district in Sakarya Province, Turkey.

Density
510/km²
people per km²

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 26°C in the first days to 23°C by the end.

A typical September day in Adapazarı reaches about 25°C in the afternoon and slips back to 14°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 20°C and 29°C. Set against its neighbours, September runs about 3°C cooler than August and about 5°C warmer than October.

10°20°30°151015202530
Avg high (°C)Avg low (°C)
12616
22616
32616
42616
52616
62615
72615
82615
92515
102515
112515
122515
132515
142514
152514
162514
172514
182414
192414
202414
212414
222414
232413
242413
252313
262313
272313
282313
292313
302312

How September really feels in Adapazarı

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.

Adapazarı 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 / 97136.79.41.1
Feb / 87135.810.41.7
Mar12° / 9513.43.711.73.0
Apr17° / 74110.713.15.2
May21° / 11°7310.5014.26.6
Jun25° / 15°6910014.97.2
Jul27° / 17°386.3014.67.5
Aug28° / 18°406.2013.67.2
Sep25° / 14°568012.37.5
Oct20° / 10°8410.2010.96.3
Nov15° / 75101.29.74.3
Dec / 10313.14.69.11.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 51% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 19% of September, with mostly cloudy or overcast conditions the remaining 30%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17723
27723
37723
47525
57525
67525
77525
87426
97426
107426
117426
127228
137228
147129
157030
166931
176832
186832
196634
206634
216634
226535
236535
246436
256436
266436
276337
286337
296337
306337

Chance of precipitation in September

Any precipitation

Adapazarı gets around 56 mm of rain over 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 26% and peaks near 30% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
125
226
326
426
526
625
725
825
924
1024
1123
1223
1323
1424
1524
1624
1725
1826
1926
2027
2127
2228
2328
2429
2529
2630
2730
2829
2929
3029

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 36% of days. Sticky, muggy-or-worse air turns up on roughly 9% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1102639241
2112839221
3122938201
4133038181
5143137170
6153237150
7163337140
8173436130
9183436110
10183536110
11193636100
1219363690
1320363580
1421363580
1521373570
1622373470
1723373370
1824373260
1925383160
2026383050
2128382950
2229382840
2331392640
2433392530
2534392430
2636392220
2738392120
2839392020
2941391910
3042391810

Wind in September

Winds average 6 km/h in September.

Across September, daily wind ranges from about 6 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 hours 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 84 minutes over September. Sunrise moves from 5:30 AM to 5:59 AM, and sunset from 6:27 PM to 5:36 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.05:306:27
212.95:316:25
312.95:326:23
412.85:336:22
512.85:346:20
612.75:356:18
712.75:366:16
812.65:376:15
912.65:386:13
1012.55:396:11
1112.55:406:09
1212.55:416:08
1312.45:426:06
1412.45:436:04
1512.35:446:02
1612.35:456:01
1712.25:465:59
1812.25:475:57
1912.15:485:55
2012.15:495:54
2112.05:505:52
2212.05:515:50
2311.95:525:48
2411.95:535:47
2511.85:545:45
2611.85:555:43
2711.85:565:41
2811.75:575:40
2911.75:585:38
3011.65:595:36

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.54 kWh/m².

For context, solar energy here swings from a low near 1.54 kWh/m² to a high of 6.73 kWh/m² in July across the year — September's 4.54 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.3Bright
25.2Bright
35.2Bright
45.1Bright
55.1Bright
65.0Bright
75.0Bright
84.9Bright
94.9Bright
104.8Bright
114.8Bright
124.7Bright
134.7Bright
144.6Bright
154.6Bright
164.5Bright
174.5Bright
184.4Bright
194.4Bright
204.3Bright
214.3Bright
224.2Bright
234.2Bright
244.1Bright
254.1Bright
264.0Bright
274.0Moderate
283.9Moderate
293.9Moderate
303.8Moderate
Planning a trip in September

Is September a good time to visit Adapazarı?

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

7.5
Sightseeing
1st-best month of the year
6.5
Beach & pool
3rd-best month of the year

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

What to pack for Adapazarı in September

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

In September, Adapazarı sees daytime highs around 25°C and nights near 14°C. Worth packing: light clothes, rain gear and sun protection. About 8 days see rain.

light clothesrain gearsun protection

Sea temperature near Adapazarı 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 43 km away) is warmest in August at about 25°C and coldest in February near 7°C.

It's comfortable for a long swim from Jun 11 to Oct 11 — about 4 months when the water holds above 20°C.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan9Bracing
Feb7Bracing
Mar8Bracing
Apr11Bracing
May16Cool
Jun21Refreshing
Jul24Warm
Aug25Warm
Sep23Refreshing
Oct20Cool
Nov15Cool
Dec11Bracing

UV index in Adapazarı in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Adapazarı peaks around August 10 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 2 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowAug 10UV 9Dec 21UV 2
UV index (midday)Level
Jan2Low
Feb2Moderate
Mar3Moderate
Apr7High
May7High
Jun9Very high
Jul9Very high
Aug9Very high
Sep6High
Oct4Moderate
Nov2Moderate
Dec2Low

Air quality in Adapazarı 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 Adapazarı is worst in March — around 16 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (December, 9 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodMar 2416 µg/m³Dec 219 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb11Good
Mar16Moderate
Apr16Moderate
May16Moderate
Jun13Moderate
Jul10Good
Aug11Good
Sep10Good
Oct10Good
Nov10Good
Dec9Good
Location & terrain

Where is Adapazarı?

Adapazarı sits at 40.8°N, 30.4°E, 34 m above sea level, in Turkey. The nearest listed city is Sapanca, 15 km away.

Topography around Adapazarı

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

Within 3 km, the terrain around Adapazarı has only modest variations in elevation — a maximum elevation change of 54 m around an average of 31 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 473 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,820 m.

The land around Adapazarı is covered by artificial surfaces (68%) within 3 km, trees (40%) and cropland (35%) within 16 km, and trees (56%) and water (22%) within 80 km.

3 km
54 m
16 km
473 m
80 km
1,820 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Sapanca 15 km · Ferizli 19 km · Akyazı 21 km · Hendek 29 km · Geyve 32 km · Kandıra 38 km · İzmit 40 km · Karasu 44 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 Adapazarı (40.7806°, 30.4033°, elevation 34 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).