Merter Keresteciler weather in December

In December, Merter Keresteciler sees average daytime highs of 10°C and overnight lows near 7°C, with 99 mm of precipitation across 13 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 Merter Keresteciler's 12th-clearest and 1st-windiest month. For the whole year in context, see Merter Keresteciler's year-round climate.

Daytime high
10°
10th warmest
Overnight low
4th coldest
Precipitation
99 mm
13 wet days
Daylight
9 h 06 min
7:29 AM – 4:33 PM
Cloud cover
68%
12th clearest
Wind
17 km/h
1st windiest
Solar energy
1.46 kWh/m²
Travel score
2.1
out of 10

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 Merter Keresteciler reaches about 10°C in the afternoon and slips back to 7°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 6°C and 14°C. Set against its neighbours, December runs about 4°C cooler than November and about 2°C warmer than January.

10°15°20°151015202531
Avg high (°C)Avg low (°C)
1129
2129
3128
4128
5118
6118
7118
8118
9118
10117
11107
12107
13107
14107
15107
16107
17107
18107
19107
20106
21106
2296
2396
2496
2596
2696
2796
2896
2996
3096
3196

Merter Keresteciler 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 / 8412.63.19.41.3
Feb / 7011.62.610.41.5
Mar11° / 7210.50.911.72.5
Apr14° / 10°478.30.113.14.6
May19° / 14°356.2014.37.0
Jun24° / 19°325.4014.98.1
Jul27° / 21°233.5014.68.3
Aug27° / 22°213.2013.68.3
Sep24° / 19°466.3012.37.9
Oct19° / 15°758.8010.96.4
Nov14° / 11°729.80.19.74.2
Dec10° / 99131.59.12.1

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 11% of December, with mostly cloudy or overcast conditions the remaining 66%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13763
23763
33664
43565
53565
63565
73565
83565
93466
103466
113466
123466
133565
143466
153466
163466
173367
183367
193367
203367
213367
223466
233367
243367
253367
263367
273367
283367
293367
303268
313367

Chance of precipitation in December

Any precipitationSnow

Merter Keresteciler gets around 99 mm of rain and snow over 13 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 43% and peaks near 45% on the wettest days, and about 2 days bring snow.

0%20%40%60%151015202531
Rain chance (%)Snow chance (%)
1391
2402
3402
4402
5412
6413
7413
8413
9423
10424
11424
12434
13434
14435
15435
16435
17435
18435
19435
20435
21436
22436
23436
24447
25447
26447
27458
28458
29458
30459
31459

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 17 km/h in December, the windiest month of the year.

Across December, daily wind ranges from about 16 km/h on the calmest days to 17 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
116light breeze
216light breeze
316light breeze
416light breeze
517light breeze
617light breeze
717light breeze
817light breeze
917light breeze
1017light breeze
1117light breeze
1217light breeze
1317light breeze
1417light breeze
1517light breeze
1617light breeze
1717light breeze
1817light breeze
1917light breeze
2017light breeze
2117light breeze
2217light breeze
2317light breeze
2417light breeze
2517light breeze
2617light breeze
2717light breeze
2817light breeze
2917light breeze
3017light breeze
3117light breeze

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 7:16 AM to 7:35 AM, and sunset from 4:32 PM to 4:40 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.37:164:32
29.27:174:32
39.27:184:32
49.27:194:32
59.27:204:32
69.27:214:31
79.27:224:31
89.17:234:31
99.17:234:31
109.17:244:32
119.17:254:32
129.17:264:32
139.17:274:32
149.17:274:32
159.17:284:32
169.17:294:33
179.17:294:33
189.17:304:33
199.17:304:34
209.07:314:34
219.07:324:34
229.07:324:35
239.07:324:35
249.07:334:36
259.17:334:36
269.17:344:37
279.17:344:38
289.17:344:38
299.17:354:39
309.17:354:40
319.17:354:40

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 1.46 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 1.46 kWh/m² to a high of 6.87 kWh/m² in July across the year — December's 1.46 kWh/m² sits near the bottom.

00.511.522.5151015202531
Solar energy (kWh/m²)Level
11.6Dim
21.6Dim
31.6Dim
41.5Dim
51.5Dim
61.5Dim
71.5Dim
81.5Dim
91.5Dim
101.5Dim
111.5Dim
121.5Dim
131.5Dim
141.4Dim
151.4Dim
161.4Dim
171.4Dim
181.4Dim
191.4Dim
201.4Dim
211.4Dim
221.4Dim
231.4Dim
241.4Dim
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 Merter Keresteciler?

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
9th-best month of the year

December is a weaker month for outdoor sightseeing in Merter Keresteciler.

What to pack for Merter Keresteciler in December

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

In December, Merter Keresteciler sees daytime highs around 10°C and nights near 7°C. Pack a warm layer. Worth having: rain gear. About 13 days see rain.

a warm layerrain gear

Sea temperature near Merter Keresteciler 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 15 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 11 to Oct 7 — about 3.9 months when the water holds above 20°C.

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

UV index in Merter Keresteciler in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 1. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Merter Keresteciler peaks around July 14 at about 9 (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 highModerateLowJul 14UV 9Dec 22UV 1
UV index (midday)Level
Jan2Low
Feb2Moderate
Mar4Moderate
Apr7High
May7High
Jun9Very high
Jul9Very high
Aug9Very high
Sep7High
Oct4Moderate
Nov2Moderate
Dec1Low

Air quality in Merter Keresteciler 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 Merter Keresteciler is worst in March — around 17 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (July, 9 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodMar 1917 µg/m³Jul 189 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb14Moderate
Mar17Moderate
Apr16Moderate
May13Moderate
Jun10Good
Jul9Good
Aug10Good
Sep10Good
Oct11Good
Nov11Good
Dec10Good
Location & terrain

Where is Merter Keresteciler?

Merter Keresteciler sits at 41.0°N, 28.9°E, 350 m above sea level, in Turkey. The nearest listed city is Güngören Merter, 1.0 km away.

Topography around Merter Keresteciler

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

Within 3 km, the terrain around Merter Keresteciler has only modest variations in elevation — a maximum elevation change of 106 m around an average of 52 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 276 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,294 m.

The land around Merter Keresteciler is covered by artificial surfaces (88%) within 3 km, water (40%) and artificial surfaces (38%) within 16 km, and water (56%) and trees (27%) within 80 km.

3 km
106 m
16 km
276 m
80 km
1,294 m
treesgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Güngören Merter 1.0 km · Bahçelievler 2.0 km · Zeytinburnu 3.0 km · Esenler 3.0 km · Bağcılar 4.0 km · Fatih 5.0 km · Istanbul 5.0 km · Eminönü 7.0 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 Merter Keresteciler (41.0129°, 28.8859°, elevation 350 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).