Gebze weather in December

In December, Gebze sees average daytime highs of 10°C and overnight lows near 4°C, with 87 mm of precipitation across 11.6 wet days and about 9.1 hours of daylight. It is the 10th-warmest and 1st-wettest month of the year here.

Highs ease over the month, from about 12°C in the first days to 9°C by the end. The sky is clear or mostly clear about 23% of the time in December, and the air most often feels dry.

Daylight stretches from about 9 h 18 min at the start of December to 9 h 06 min by month's end. Set against the rest of the year, December is Gebze's 12th-clearest and 6th-windiest month. For the whole year in context, see Gebze's year-round climate.

Daytime high
10°
10th warmest
Overnight low
3rd coldest
Precipitation
87 mm
11.6 wet days
Daylight
9 h 06 min
7:26 AM – 4:31 PM
Cloud cover
67%
12th clearest
Wind
9 km/h
6th windiest
Solar energy
1.48 kWh/m²
Travel score
2.1
out of 10

Gebze is district and town of Kocaeli Province, Turkey.

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

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 12°C in the first days to 9°C by the end.

A typical December day in Gebze reaches about 10°C in the afternoon and slips back to 4°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 5°C and 15°C. Set against its neighbours, December runs about 5°C cooler than November and about 2°C warmer than January.

-5°10°15°20°151015202531
Avg high (°C)Avg low (°C)
1126
2126
3126
4126
5116
6115
7115
8115
9115
10115
11105
12105
13104
14104
15104
16104
17104
18104
1994
2094
2194
2294
2394
2494
2594
2694
2793
2893
2993
3093
3193

How December really feels in Gebze

Once humidity and wind are folded in, December 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

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

Gebze weather by month

How December compares with the rest of the year at a glance. December is the 10th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 8011.84.59.41.4
Feb10° / 6610.93.710.42.0
Mar12° / 7611.3211.73.2
Apr17° / 5490.213.15.6
May22° / 12°447.4014.27.3
Jun26° / 17°477.1014.97.5
Jul29° / 19°294.4014.66.8
Aug29° / 20°274.1013.66.7
Sep26° / 16°456.5012.37.8
Oct20° / 13°628.9010.96.7
Nov15° / 628.80.49.74.7
Dec10° / 8711.62.69.12.1

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 23% of the time in December, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 12% of December, with mostly cloudy or overcast conditions the remaining 65%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14060
23961
33862
43763
53763
63664
73664
83664
93664
103664
113664
123466
133466
143466
153367
163367
173367
183466
193466
203466
213367
223367
233367
243367
253367
263367
273268
283268
293268
303169
313169

Chance of precipitation in December

Any precipitationSnow

Gebze gets around 87 mm of rain and snow over 11.6 wet days in December, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 38% and peaks near 41% on the wettest days, and about 3 days bring snow.

0%10%20%30%40%50%151015202531
Rain chance (%)Snow chance (%)
1363
2363
3374
4374
5375
6375
7376
8377
9387
10388
11388
12389
13389
143910
153910
163910
173810
183810
193810
203810
213810
223810
233810
243810
253911
263911
273911
284012
294012
304113
314113

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)
1100
2100
3100
4100
5100
6100
7100
8100
9100
10100
11100
12100
13100
14100
15100
16100
17100
18100
19100
20100
21100
22100
23100
24100
25100
26100
27100
28100
29100
30100
31100

Wind in December

Winds average 9 km/h in December.

Across December, daily wind ranges from about 9 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm
319calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 9 h 18 min at the start of December to 9 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 12 minutes over December. Sunrise moves from 7:13 AM to 7:32 AM, and sunset from 4:31 PM to 4:39 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.37:134:31
29.37:144:30
39.37:154:30
49.27:164:30
59.27:174:30
69.27:184:30
79.27:194:30
89.27:204:30
99.27:214:30
109.17:214:30
119.17:224:30
129.17:234:30
139.17:244:30
149.17:244:31
159.17:254:31
169.17:264:31
179.17:264:31
189.17:274:32
199.17:284:32
209.17:284:32
219.17:294:33
229.17:294:33
239.17:304:34
249.17:304:34
259.17:304:35
269.17:314:35
279.17:314:36
289.17:314:37
299.17:324:37
309.17:324:38
319.17:324:39

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 1.48 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 1.48 kWh/m² to a high of 6.76 kWh/m² in July across the year — December's 1.48 kWh/m² sits near the bottom.

00.511.522.5151015202531
Solar energy (kWh/m²)Level
11.6Dim
21.6Dim
31.6Dim
41.6Dim
51.6Dim
61.5Dim
71.5Dim
81.5Dim
91.5Dim
101.5Dim
111.5Dim
121.5Dim
131.5Dim
141.5Dim
151.5Dim
161.5Dim
171.5Dim
181.5Dim
191.5Dim
201.5Dim
211.5Dim
221.5Dim
231.5Dim
241.5Dim
251.5Dim
261.5Dim
271.5Dim
281.5Dim
291.5Dim
301.5Dim
311.5Dim
Planning a trip in December

Is December a good time to visit Gebze?

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

2.1
Sightseeing
10th-best month of the year
0.0
Beach & pool
10th-best month of the year

December is a weaker month for outdoor sightseeing in Gebze.

What to pack for Gebze in December

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

In December, Gebze sees daytime highs around 10°C and nights near 4°C. Pack a warm layer. Worth having: rain gear. About 12 days see rain.

a warm layerrain gear

Sea temperature near Gebze in December

The nearest coast averages about 12°C in December — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 27 km away) is warmest in August at about 24°C and coldest in February near 8°C.

It's comfortable for a long swim from Jun 12 to Oct 6 — about 3.8 months when the water holds above 20°C.

5°10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan9Bracing
Feb8Bracing
Mar9Bracing
Apr11Bracing
May16Cool
Jun21Refreshing
Jul23Refreshing
Aug24Warm
Sep22Refreshing
Oct19Cool
Nov15Cool
Dec12Bracing

UV index in Gebze in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 2. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Gebze peaks around June 23 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 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 highModerateLowJun 23UV 9Dec 22UV 2
UV index (midday)Level
Jan2Low
Feb2Moderate
Mar4Moderate
Apr7High
May7High
Jun9Very high
Jul9Very high
Aug9Very high
Sep7High
Oct4Moderate
Nov2Moderate
Dec2Low

Air quality in Gebze in December

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Gebze is worst in March — around 18 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (December, 10 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodMar 2317 µg/m³Dec 1810 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb14Moderate
Mar18Moderate
Apr17Moderate
May17Moderate
Jun13Moderate
Jul11Good
Aug11Good
Sep10Good
Oct11Good
Nov12Good
Dec10Good
Location & terrain

Where is Gebze?

Gebze sits at 40.8°N, 29.4°E, 182 m above sea level, in Turkey. The nearest listed city is Karamürsel, 20 km away.

Topography around Gebze

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

Within 3 km, the terrain around Gebze has significant variations in elevation — a maximum elevation change of 296 m around an average of 154 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 422 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,295 m.

The land around Gebze is covered by artificial surfaces (66%) and trees (23%) within 3 km, water (34%), trees (23%) and artificial surfaces (22%) within 16 km, and trees (40%) and water (37%) within 80 km.

3 km
296 m
16 km
422 m
80 km
2,295 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Karamürsel 20 km · Yalova 21 km · Sultanbeyli 22 km · Maltepe 27 km · Sancaktepe 28 km · Körfez 30 km · Derince 33 km · Ataşehir 33 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 Gebze (40.8028°, 29.4307°, elevation 182 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).