Sinop weather in September

In September, Sinop sees average daytime highs of 23°C and overnight lows near 19°C, with 45 mm of rain across 7 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 Sinop's 4th-clearest and 8th-windiest month. For the whole year in context, see Sinop's year-round climate.

Daytime high
23°
3rd warmest
Overnight low
19°
10th coldest
Rainfall
45 mm
7 wet days
Daylight
12 h 18 min
5:25 AM – 5:42 PM
Cloud cover
36%
4th clearest
Wind
15 km/h
8th windiest
Solar energy
4.37 kWh/m²
Travel score
7.7
out of 10

Sinop is central district and city in Sinop Province, Turkey.

Air quality
Elevated
PM10 50.2 µg/m³ · 2019

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 24°C in the first days to 21°C by the end.

A typical September day in Sinop reaches about 23°C in the afternoon and slips back to 19°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 20°C and 25°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)
12421
22421
32421
42421
52421
62420
72420
82320
92320
102320
112320
122320
132320
142320
152319
162219
172219
182219
192219
202219
212219
222219
232218
242218
252118
262118
272118
282118
292118
302118

Sinop 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 / 7613.32.49.31.5
Feb / 6111.22.310.31.4
Mar10° / 6211.30.611.72.0
Apr12° / 448.9013.13.5
May17° / 14°306.2014.36.1
Jun22° / 19°214.60158.0
Jul25° / 22°173.1014.78.7
Aug26° / 23°214.1013.78.4
Sep23° / 19°457012.37.7
Oct19° / 15°739.8010.96.1
Nov14° / 11°7310.50.19.64.2
Dec11° / 95141.392.3

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 23%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18614
28614
38614
48515
58515
68515
78416
88416
98416
108416
118218
128218
138218
148020
158020
167822
177723
187525
197525
207327
217228
227129
237030
246931
256832
266733
276634
286634
296634
306535

Chance of precipitation in September

Any precipitation

Sinop gets around 45 mm of rain over 7 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 23% and peaks near 26% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
121
221
321
421
521
621
721
821
921
1021
1121
1221
1321
1421
1522
1622
1722
1823
1923
2024
2124
2225
2325
2426
2526
2626
2726
2826
2926
3026

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 36% of days. Sticky, muggy-or-worse air turns up on roughly 27% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1416343610
251735349
351835338
461936328
571937317
672037306
782038295
892138285
992138274
10102239263
11102239263
12112338253
13112339252
14122338252
15122438252
16132437241
17132537241
18142536241
19142636231
20152635231
21162634221
22172734221
23182733211
24192733201
25202833191
26212833181
27222833171
28232833160
29232833150
30242833140

Wind in September

Winds average 15 km/h in September.

Across September, daily wind ranges from about 15 km/h on the calmest days to 15 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
115light breeze
215light breeze
315light breeze
415light breeze
515light breeze
615light breeze
715light breeze
815light breeze
915light breeze
1015light breeze
1115light breeze
1215light breeze
1315light breeze
1415light breeze
1515light breeze
1615light breeze
1715light breeze
1815light breeze
1915light breeze
2015light breeze
2115light breeze
2215light breeze
2315light breeze
2415light breeze
2515light breeze
2615light breeze
2715light breeze
2815light breeze
2915light breeze
3015light breeze

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 5:09 AM to 5:41 AM, and sunset from 6:09 PM to 5:17 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.05:096:09
212.95:106:07
312.95:116:05
412.95:126:04
512.85:146:02
612.85:156:00
712.75:165:58
812.75:175:57
912.65:185:55
1012.65:195:53
1112.55:205:51
1212.55:215:49
1312.45:225:47
1412.45:235:46
1512.35:245:44
1612.35:255:42
1712.25:265:40
1812.25:275:38
1912.15:295:37
2012.15:305:35
2112.05:315:33
2212.05:325:31
2311.95:335:29
2411.95:345:27
2511.85:355:26
2611.85:365:24
2711.75:375:22
2811.75:385:20
2911.65:405:18
3011.65:415:17

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.37 kWh/m².

For context, solar energy here swings from a low near 1.45 kWh/m² to a high of 6.7 kWh/m² in July across the year — September's 4.37 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.1Bright
25.0Bright
35.0Bright
44.9Bright
54.9Bright
64.8Bright
74.8Bright
84.8Bright
94.7Bright
104.7Bright
114.6Bright
124.6Bright
134.5Bright
144.5Bright
154.4Bright
164.4Bright
174.3Bright
184.3Bright
194.2Bright
204.2Bright
214.1Bright
224.1Bright
234.0Bright
244.0Moderate
253.9Moderate
263.9Moderate
273.8Moderate
283.8Moderate
293.7Moderate
303.7Moderate
Planning a trip in September

Hazard calendar for Sinop

In seasonPeak

In September, Sinop sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Sinop's rainy season runs September–April, 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 Sinop?

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

7.7
Sightseeing
4th-best month of the year
5.6
Beach & pool
4th-best month of the year

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

What to pack for Sinop in September

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

In September, Sinop sees daytime highs around 23°C and nights near 19°C. Worth packing: light clothes. About 7 days see rain.

light clothes

Sea temperature near Sinop 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 8°C.

It's comfortable for a long swim from Jun 17 to Oct 9 — about 3.8 months when the water holds above 20°C.

10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan9Bracing
Feb8Bracing
Mar8Bracing
Apr10Bracing
May14Bracing
Jun20Refreshing
Jul24Refreshing
Aug25Warm
Sep23Refreshing
Oct19Cool
Nov15Cool
Dec12Bracing

UV index in Sinop 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 Sinop peaks around June 23 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 1 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJun 23UV 8Dec 22UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar3Moderate
Apr6High
May6High
Jun8Very high
Jul8Very high
Aug8Very high
Sep6High
Oct4Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Sinop?

Sinop sits at 42.0°N, 35.2°E, 100 m above sea level, in Turkey. The nearest listed city is Boyabat, 70 km away.

TaşköprüVezirköprüOsmancıkHavzaSamsunMerzifon

Topography around Sinop

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

Within 3 km, the terrain around Sinop has only modest variations in elevation — a maximum elevation change of 213 m around an average of 33 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 217 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,850 m.

The land around Sinop is covered by water (69%) within 3 km, water (79%) within 16 km, and water (49%) and trees (33%) within 80 km.

3 km
213 m
16 km
217 m
80 km
1,850 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Boyabat 70 km · Bafra 80 km · Taşköprü 97 km · Vezirköprü 101 km · Osmancık 120 km · Havza 125 km · Samsun 128 km · Merzifon 131 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 Sinop (42.0268°, 35.1625°, elevation 100 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).