Gölcük weather in October

In October, Gölcük sees average daytime highs of 20°C and overnight lows near 12°C, with 81 mm of rain across 10.4 wet days and about 10.9 hours of daylight. It is the 6th-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 22°C in the first days to 17°C by the end. The sky is clear or mostly clear about 35% of the time in October, and the air most often feels dry.

Daylight stretches from about 11 h 36 min at the start of October to 10 h 18 min by month's end. Set against the rest of the year, October is Gölcük's 6th-clearest and 8th-windiest month. For the whole year in context, see Gölcük's year-round climate.

Daytime high
20°
6th warmest
Overnight low
12°
8th coldest
Rainfall
81 mm
10.4 wet days
Daylight
10 h 54 min
6:19 AM – 5:13 PM
Cloud cover
54%
6th clearest
Wind
8 km/h
8th windiest
Solar energy
2.94 kWh/m²
Travel score
6.3
out of 10

Gölcük is town of Kocaeli Province in Turkey.

Density
271/km²
people per km²

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in October

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 22°C in the first days to 17°C by the end.

A typical October day in Gölcük reaches about 20°C in the afternoon and slips back to 12°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 15°C and 25°C. Set against its neighbours, October runs about 5°C cooler than September and about 5°C warmer than November.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
12314
22314
32213
42213
52213
62213
72213
82213
92113
102113
112113
122112
132112
142012
152012
162012
172012
182012
191911
201911
211911
221911
231911
241811
251810
261810
271810
281710
291710
30179
31179

How October really feels in Gölcük

Once humidity and wind are folded in, October 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

October sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Gölcük weather by month

How October compares with the rest of the year at a glance. October is the 6th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 9513.66.29.41.1
Feb / 8112.65.310.41.7
Mar12° / 8812.92.711.73.0
Apr17° / 6610.80.513.15.2
May21° / 12°599.3014.26.9
Jun26° / 16°639.7014.97.2
Jul28° / 18°385.8014.67.3
Aug28° / 19°365.5013.67.1
Sep25° / 15°577.9012.37.6
Oct20° / 12°8110.4010.96.3
Nov14° / 7510.219.74.3
Dec / 103133.89.11.8

Cloud cover in October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 35% of the time in October.

Beyond those clear spells, partly cloudy skies cover about 18% of October, with mostly cloudy or overcast conditions the remaining 47%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16436
26337
36238
46139
56040
65941
75941
85842
95743
105545
115446
125347
135248
145248
155248
165149
175050
184951
194951
204951
215050
224951
234852
244852
254951
264951
274951
284852
294852
304852
314951

Chance of precipitation in October

Any precipitation

Gölcük gets around 81 mm of rain over 10.4 wet days in October. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 33% and peaks near 36% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
130
230
330
430
530
630
731
831
931
1031
1131
1232
1332
1433
1534
1634
1735
1835
1935
2036
2136
2236
2336
2436
2536
2636
2735
2835
2935
3034
3133

Humidity in October

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, October lands in the dry band about 60% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
13940192
24140182
34240172
44340161
54440151
64540141
74640131
84740121
94840111
104940101
11513991
12523981
13523981
14543871
15553861
16583750
17593650
18613540
19623440
20643330
21663130
22692920
23712720
24732520
25762310
26782110
27801910
28821710
29841510
30871300
31881200

Wind in October

Winds average 8 km/h in October.

Across October, daily wind ranges from about 8 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm
318calm

Sunrise & sunset in October

DaylightNight

Daylight runs from about 11 h 36 min at the start of October to 10 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 78 minutes over October. Sunrise moves from 6:03 AM to 6:36 AM, and sunset from 5:37 PM to 4:52 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.66:035:37
211.56:045:35
311.56:055:34
411.46:065:32
511.46:075:30
611.36:085:28
711.36:095:27
811.36:105:25
911.26:115:24
1011.26:125:22
1111.16:135:20
1211.16:145:19
1311.06:165:17
1411.06:175:16
1510.96:185:14
1610.96:195:13
1710.96:205:11
1810.86:215:10
1910.86:225:08
2010.76:235:07
2110.76:255:05
2210.66:265:04
2310.66:275:03
2410.66:285:01
2510.56:295:00
2610.56:304:58
2710.46:324:57
2810.46:334:56
2910.36:344:55
3010.36:354:53
3110.36:364:52

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 2.94 kWh/m².

For context, solar energy here swings from a low near 1.5 kWh/m² to a high of 6.72 kWh/m² in July across the year — October's 2.94 kWh/m² falls in the middle.

01234151015202531
Solar energy (kWh/m²)Level
13.7Moderate
23.6Moderate
33.6Moderate
43.5Moderate
53.5Moderate
63.4Moderate
73.4Moderate
83.3Moderate
93.3Moderate
103.2Moderate
113.2Moderate
123.1Moderate
133.1Moderate
143.0Moderate
153.0Moderate
162.9Moderate
172.9Moderate
182.8Moderate
192.8Moderate
202.8Moderate
212.7Moderate
222.7Moderate
232.6Moderate
242.6Moderate
252.6Moderate
262.5Moderate
272.5Moderate
282.5Moderate
292.5Moderate
302.4Moderate
312.4Moderate
Planning a trip in October

Is October a good time to visit Gölcük?

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

6.3
Sightseeing
6th-best month of the year
3.3
Beach & pool
6th-best month of the year

October is a reasonable time to visit Gölcük for sightseeing.

What to pack for Gölcük in October

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

In October, Gölcük sees daytime highs around 20°C and nights near 12°C. Worth packing: rain gear. About 10 days see rain.

rain gear

Sea temperature near Gölcük in October

The nearest coast averages about 19°C in October — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 46 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 10 — about 4 months when the water holds above 20°C.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan9Bracing
Feb7Bracing
Mar8Bracing
Apr10Bracing
May16Cool
Jun21Refreshing
Jul24Warm
Aug25Warm
Sep23Refreshing
Oct19Cool
Nov15Cool
Dec11Bracing

UV index in Gölcük in October

LowModerateHighVery highExtreme

Clear-sky midday UV in October peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Gölcük peaks around June 23 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 highHighModerateLowJun 23UV 9Dec 21UV 2
UV index (midday)Level
Jan2Low
Feb2Moderate
Mar4Moderate
Apr7High
May7High
Jun9Very high
Jul9Very high
Aug9Very high
Sep6High
Oct4Moderate
Nov2Moderate
Dec2Low

Air quality in Gölcük in October

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Gölcük is worst in March — around 16 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (December, 8 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodMar 2316 µg/m³Dec 198 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb11Good
Mar16Moderate
Apr16Moderate
May15Moderate
Jun13Moderate
Jul10Good
Aug10Good
Sep10Good
Oct10Good
Nov10Good
Dec8Good
Location & terrain

Where is Gölcük?

Gölcük sits at 40.7°N, 29.8°E, 56 m above sea level, in Turkey. The nearest listed city is Derince, 5.0 km away.

Topography around Gölcük

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

Within 3 km, the terrain around Gölcük has significant variations in elevation — a maximum elevation change of 355 m around an average of 52 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,146 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,841 m.

The land around Gölcük is covered by artificial surfaces (36%), trees (32%) and water (28%) within 3 km, trees (62%) within 16 km, and trees (51%) and water (23%) within 80 km.

3 km
355 m
16 km
1,146 m
80 km
1,841 m
treesgrasslandcroplandartificial surfaceswater
October weather nearby: Derince 5.0 km · Körfez 7.0 km · İzmit 11 km · Karamürsel 17 km · İznik 33 km · Gebze 34 km · Sapanca 38 km · Osmaneli 43 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 Gölcük (40.715°, 29.8182°, elevation 56 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).