Alaplı weather in September

In September, Alaplı sees average daytime highs of 22°C and overnight lows near 17°C, with 79 mm of rain across 8.4 wet days and about 12.3 hours of daylight. It is the 3rd-warmest and 7th-wettest month of the year here.

Highs ease over the month, from about 24°C in the first days to 21°C by the end. The sky is clear or mostly clear about 59% of the time in September, and the air most often feels humid.

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 Alaplı's 4th-clearest and 7th-windiest month. For the whole year in context, see Alaplı's year-round climate.

Daytime high
22°
3rd warmest
Overnight low
17°
9th coldest
Rainfall
79 mm
8.4 wet days
Daylight
12 h 18 min
5:41 AM – 5:57 PM
Cloud cover
36%
4th clearest
Wind
10 km/h
7th windiest
Solar energy
4.49 kWh/m²
Travel score
7.4
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 24°C in the first days to 21°C by the end.

A typical September day in Alaplı reaches about 22°C in the afternoon and slips back to 17°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 19°C and 26°C. Set against its neighbours, September runs about 3°C cooler than August and about 4°C warmer than October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12419
22419
32418
42418
52318
62318
72318
82318
92318
102318
112317
122317
132317
142217
152217
162217
172217
182217
192217
202217
212217
222216
232216
242116
252116
262116
272116
282116
292116
302115

How September really feels in Alaplı

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.

Alaplı weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 10013.86.49.41.0
Feb / 8412.95.510.31.2
Mar10° / 8812.93.911.72.1
Apr14° / 579.90.613.14.0
May18° / 13°558.2014.36.2
Jun22° / 17°638.4014.97.4
Jul25° / 20°476.1014.78.1
Aug25° / 20°526.5013.68.1
Sep22° / 17°798.4012.37.4
Oct18° / 13°10010.20.110.96.0
Nov14° / 8810.51.19.74.0
Dec10° / 10814.14.49.11.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 59% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 17% of September, with mostly cloudy or overcast conditions the remaining 24%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18218
28218
38218
48119
58119
68119
78119
88119
98119
108020
117921
127921
137822
147822
157723
167624
177525
187525
197426
207327
217228
227228
237129
247129
257129
267129
277030
287030
297030
307030

Chance of precipitation in September

Any precipitation

Alaplı gets around 79 mm of rain over 8.4 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 27% and peaks near 30% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
127
227
328
428
527
627
727
826
926
1026
1125
1225
1325
1425
1525
1625
1726
1826
1927
2027
2128
2229
2329
2430
2530
2630
2730
2830
2929
3029

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 37% of days. Sticky, muggy-or-worse air turns up on roughly 15% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
182138313
292338292
3102438272
4102538252
5112639232
6122739211
7122739201
8132840181
9142840171
10142940161
11142940151
12152941150
13153041140
14163040140
15163040130
16173040130
17173139130
18183139120
19193238120
20203237110
21213336100
22223435100
2323343490
2425353380
2526353270
2627363160
2728373050
2830372940
2931372840
3032382730

Wind in September

Winds average 10 km/h in September.

Across September, daily wind ranges from about 10 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm

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 5:25 AM to 5:55 AM, and sunset from 6:23 PM to 5:32 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.05:256:23
212.95:266:21
312.95:276:20
412.85:286:18
512.85:296:16
612.75:306:15
712.75:316:13
812.65:326:11
912.65:336:09
1012.65:346:08
1112.55:366:06
1212.55:376:04
1312.45:386:02
1412.45:396:00
1512.35:405:59
1612.35:415:57
1712.25:425:55
1812.25:435:53
1912.15:445:52
2012.15:455:50
2112.05:465:48
2212.05:475:46
2311.95:485:44
2411.95:495:43
2511.85:505:41
2611.85:515:39
2711.85:525:37
2811.75:535:36
2911.75:545:34
3011.65:555:32

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.49 kWh/m².

For context, solar energy here swings from a low near 1.52 kWh/m² to a high of 6.66 kWh/m² in July across the year — September's 4.49 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.2Bright
25.2Bright
35.1Bright
45.1Bright
55.0Bright
65.0Bright
74.9Bright
84.9Bright
94.8Bright
104.8Bright
114.7Bright
124.7Bright
134.6Bright
144.6Bright
154.5Bright
164.5Bright
174.4Bright
184.4Bright
194.3Bright
204.3Bright
214.2Bright
224.2Bright
234.1Bright
244.1Bright
254.0Bright
264.0Moderate
273.9Moderate
283.9Moderate
293.9Moderate
303.8Moderate
Planning a trip in September

Is September a good time to visit Alaplı?

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

7.4
Sightseeing
3rd-best month of the year
5.3
Beach & pool
4th-best month of the year

September is one of the better times to visit Alaplı for general sightseeing.

What to pack for Alaplı in September

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

In September, Alaplı sees daytime highs around 22°C and nights near 17°C. Worth packing: light clothes and rain gear. About 8 days see rain.

light clothesrain gear

Sea temperature near Alaplı 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 offshore 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 12 — about 4.1 months when the water holds above 20°C.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan9Bracing
Feb7Bracing
Mar8Bracing
Apr11Bracing
May16Cool
Jun21Refreshing
Jul24Refreshing
Aug25Warm
Sep23Refreshing
Oct20Cool
Nov15Cool
Dec12Bracing

UV index in Alaplı 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 Alaplı peaks around August 10 at about 8 (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 8Dec 21UV 2
UV index (midday)Level
Jan2Low
Feb2Moderate
Mar3Moderate
Apr6High
May7High
Jun8Very high
Jul8Very high
Aug8Very high
Sep6High
Oct4Moderate
Nov2Moderate
Dec2Low

Air quality in Alaplı 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 Alaplı is worst in March — around 15 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (December, 8 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodMar 2115 µg/m³Dec 198 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb10Good
Mar15Moderate
Apr14Moderate
May13Moderate
Jun11Good
Jul9Good
Aug9Good
Sep9Good
Oct10Good
Nov10Good
Dec8Good
Location & terrain

Where is Alaplı?

Alaplı sits at 41.2°N, 31.4°E, 7 m above sea level, in Turkey. The nearest listed city is Ereğli, 12 km away.

Topography around Alaplı

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

Within 3 km, the terrain around Alaplı has only modest variations in elevation — a maximum elevation change of 203 m around an average of 44 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 909 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,205 m.

The land around Alaplı is covered by trees (44%) and water (43%) within 3 km, trees (53%) and water (40%) within 16 km, and trees (59%) and water (30%) within 80 km.

3 km
203 m
16 km
909 m
80 km
2,205 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Ereğli 12 km · Akçakoca 24 km · Düzce 42 km · Zonguldak 45 km · Kaynaşlı 46 km · Kocaali 47 km · Devrek 48 km · Karasu Mahallesi 52 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 Alaplı (41.1814°, 31.3851°, elevation 7 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).