Gölcük weather in April

In April, Gölcük sees average daytime highs of 17°C and overnight lows near 7°C, with 66 mm of precipitation across 10.8 wet days and about 13.1 hours of daylight. It is the 7th-warmest and 7th-wettest month of the year here.

Highs climb over the month, from about 15°C in the first days to 18°C by the end. The sky is clear or mostly clear about 33% of the time in April, and the air most often feels dry.

Daylight stretches from about 12 h 24 min at the start of April to 13 h 42 min by month's end. Set against the rest of the year, April is Gölcük's 7th-clearest and 10th-windiest month. For the whole year in context, see Gölcük's year-round climate.

Daytime high
17°
7th warmest
Overnight low
6th coldest
Precipitation
66 mm
10.8 wet days
Daylight
13 h 06 min
5:28 AM – 6:33 PM
Cloud cover
57%
7th clearest
Wind
7 km/h
10th windiest
Solar energy
5.05 kWh/m²
Travel score
5.2
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 April

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 15°C in the first days to 18°C by the end.

A typical April day in Gölcük reaches about 17°C in the afternoon and slips back to 7°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 10°C and 23°C. Set against its neighbours, April runs about 5°C warmer than March and about 5°C cooler than May.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
1145
2156
3156
4156
5156
6156
7166
8167
9167
10167
11167
12167
13167
14177
15177
16177
17178
18178
19178
20178
21178
22178
23188
24188
25188
26188
27189
28189
29199
30199

How April really feels in Gölcük

Once humidity and wind are folded in, April 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

April 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 April compares with the rest of the year at a glance. April is the 7th-warmest and 7th-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 April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 33% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 14% of April, with mostly cloudy or overcast conditions the remaining 52%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14357
24357
34357
44555
54555
64555
74555
84654
94753
104753
114753
124654
134654
144555
154654
164654
174654
184753
194753
204852
214852
224951
234951
245050
255149
265149
275347
285347
295446
305545

Chance of precipitation in April

Any precipitationSnow

Gölcük gets around 66 mm of rain and snow over 10.8 wet days in April. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 36% and peaks near 42% on the wettest days, and about 1 day brings snow. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)Snow chance (%)
1414
2423
3423
4413
5413
6413
7403
8403
9403
10393
11392
12392
13392
14392
15382
16381
17371
18361
19351
20341
21331
22320
23320
24310
25300
26290
27280
28280
29270
30270

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, April lands in the dry band about 97% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)
11000
21000
31000
4991
5991
6991
7991
8991
9982
10982
11982
12982
13982
14982
15973
16973
17973
18973
19973
20973
21973
22973
23964
24964
25955
26946
27937
28928
299010
308911

Wind in April

Winds average 7 km/h in April.

Across April, daily wind ranges from about 7 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 24 min at the start of April to 13 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 78 minutes over April. Sunrise moves from 5:53 AM to 5:08 AM, and sunset from 6:18 PM to 6:48 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.45:536:18
212.55:526:19
312.55:506:20
412.55:486:21
512.65:466:22
612.65:456:23
712.75:436:24
812.75:416:25
912.85:406:26
1012.85:386:27
1112.95:376:28
1212.95:356:29
1312.95:336:30
1413.05:326:31
1513.05:306:32
1613.15:286:33
1713.15:276:34
1813.25:256:36
1913.25:246:37
2013.35:226:38
2113.35:216:39
2213.35:196:40
2313.45:186:41
2413.45:166:42
2513.55:156:43
2613.55:136:44
2713.65:126:45
2813.65:116:46
2913.65:096:47
3013.75:086:48

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 5.05 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 — April's 5.05 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
14.4Bright
24.4Bright
34.5Bright
44.5Bright
54.6Bright
64.6Bright
74.7Bright
84.7Bright
94.8Bright
104.8Bright
114.9Bright
124.9Bright
135.0Bright
145.0Bright
155.0Bright
165.1Bright
175.1Bright
185.1Bright
195.2Bright
205.2Bright
215.3Bright
225.3Bright
235.3Bright
245.4Bright
255.4Bright
265.5Bright
275.5Bright
285.5Bright
295.6Bright
305.6Bright
Planning a trip in April

Is April a good time to visit Gölcük?

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

5.2
Sightseeing
7th-best month of the year
1.1
Beach & pool
7th-best month of the year

April is a reasonable time to visit Gölcük for sightseeing.

What to pack for Gölcük in April

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

In April, Gölcük sees daytime highs around 17°C and nights near 7°C. Worth packing: a warm layer, rain gear and sun protection. About 11 days see rain.

a warm layerrain gearsun protection

Sea temperature near Gölcük in April

The nearest coast averages about 10°C in April — 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 April

LowModerateHighVery highExtreme

Clear-sky midday UV in April 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 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 April

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where April 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
April 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).