Mersin weather in December

In December, Mersin sees average daytime highs of 16°C and overnight lows near 12°C, with 126 mm of rain across 9.4 wet days and about 9.5 hours of daylight. It is the 10th-warmest and 1st-wettest month of the year here.

Highs ease over the month, from about 17°C in the first days to 14°C by the end. The sky is clear or mostly clear about 42% of the time in December, and the air most often feels dry.

Daylight stretches from about 9 h 42 min at the start of December to 9 h 30 min by month's end. Set against the rest of the year, December is Mersin's 11th-clearest and 1st-windiest month. For the whole year in context, see Mersin's year-round climate.

Daytime high
16°
10th warmest
Overnight low
12°
3rd coldest
Rainfall
126 mm
9.4 wet days
Daylight
9 h 30 min
6:53 AM – 4:22 PM
Cloud cover
50%
11th clearest
Wind
13 km/h
1st windiest
Solar energy
2.16 kWh/m²
Travel score
5.0
out of 10

Mersin is city in Turkey.

Air quality
High
PM10 84.3 µg/m³ · 2018
Density
34/km²
people per km²

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 17°C in the first days to 14°C by the end.

A typical December day in Mersin reaches about 16°C in the afternoon and slips back to 12°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 12°C and 18°C. Set against its neighbours, December runs about 5°C cooler than November and about 2°C warmer than January.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
11714
21714
31713
41713
51713
61713
71713
81613
91613
101613
111612
121612
131612
141612
151512
161512
171512
181512
191512
201512
211511
221511
231511
241511
251511
261511
271511
281511
291411
301411
311411

How December really feels in Mersin

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.

Mersin 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 daysDaylight (hours)Travel score
Jan14° / 10°999.69.84.2
Feb15° / 10°627.910.64.6
Mar17° / 12°476.711.76.1
Apr20° / 15°295.312.97.2
May24° / 19°213.813.98.4
Jun27° / 23°51.414.58.5
Jul29° / 26°20.414.37.3
Aug30° / 26°30.813.46.6
Sep29° / 24°112.412.27.4
Oct26° / 21°303.8118.2
Nov20° / 16°705.5107.4
Dec16° / 12°1269.49.55.0

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 42% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 15% of December, with mostly cloudy or overcast conditions the remaining 44%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16040
26040
36040
45941
55941
65941
75941
85842
95842
105842
115743
125743
135743
145743
155743
165644
175644
185644
195545
205545
215545
225545
235545
245545
255446
265446
275347
285347
295248
305248
315347

Chance of precipitation in December

Any precipitation

Mersin gets around 126 mm of rain over 9.4 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 rain averages around 31% and peaks near 34% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)
124
225
326
427
528
629
730
830
931
1032
1132
1233
1333
1433
1533
1632
1732
1832
1931
2031
2131
2231
2331
2431
2531
2631
2732
2832
2933
3033
3134

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 97% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)
1937
2946
3946
4955
5964
6964
7973
8973
9982
10982
11982
12982
13982
14982
15991
16982
17982
18982
19982
20982
21982
22982
23982
24982
25982
26982
27982
28982
29982
30982
31982

Wind in December

Winds average 13 km/h in December, the windiest month of the year.

Across December, daily wind ranges from about 12 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
112light breeze
212light breeze
312light breeze
412light breeze
512light breeze
612light breeze
712light breeze
812light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze
3113light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 9 h 42 min at the start of December to 9 h 30 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 6:41 AM to 6:59 AM, and sunset from 4:21 PM to 4:30 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.76:414:21
29.66:424:21
39.66:434:21
49.66:444:21
59.66:454:21
69.66:464:21
79.66:464:21
89.66:474:21
99.56:484:21
109.56:494:21
119.56:504:21
129.56:504:21
139.56:514:22
149.56:524:22
159.56:524:22
169.56:534:22
179.56:534:23
189.56:544:23
199.56:554:23
209.56:554:24
219.56:564:24
229.56:564:25
239.56:574:25
249.56:574:26
259.56:574:26
269.56:584:27
279.56:584:27
289.56:584:28
299.56:594:29
309.56:594:29
319.56:594:30

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.16 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.16 kWh/m² to a high of 7.26 kWh/m² in June across the year — December's 2.16 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.4Moderate
22.4Moderate
32.3Moderate
42.3Moderate
52.3Moderate
62.3Moderate
72.2Moderate
82.2Moderate
92.2Moderate
102.2Moderate
112.2Moderate
122.2Moderate
132.1Moderate
142.1Moderate
152.1Moderate
162.1Moderate
172.1Moderate
182.1Moderate
192.1Moderate
202.1Moderate
212.1Moderate
222.1Moderate
232.1Moderate
242.1Moderate
252.1Moderate
262.1Moderate
272.1Moderate
282.1Moderate
292.1Moderate
302.1Moderate
312.1Moderate
Planning a trip in December

Hazard calendar for Mersin

In seasonPeak

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

Mersin's rainy season runs November–February, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is December a good time to visit Mersin?

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

5.0
Sightseeing
10th-best month of the year
0.5
Beach & pool
10th-best month of the year

December is a reasonable time to visit Mersin for sightseeing.

What to pack for Mersin in December

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

In December, Mersin sees daytime highs around 16°C and nights near 12°C. Worth packing: a warm layer and rain gear. About 9 days see rain.

a warm layerrain gear

Sea temperature near Mersin in December

The nearest coast averages about 20°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 21 km away) is warmest in August at about 29°C and coldest in February near 17°C.

It's comfortable for a long swim from May 3 to Dec 16 — about 7.5 months when the water holds above 20°C.

15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan18Cool
Feb17Cool
Mar17Cool
Apr18Cool
May21Refreshing
Jun25Warm
Jul28Warm
Aug29Tropical
Sep28Tropical
Oct26Warm
Nov23Refreshing
Dec20Refreshing

UV index in Mersin 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 Mersin peaks around June 23 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 12 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateVery highHighModerateJun 23UV 9Jan 12UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr7Very high
May8Very high
Jun9Very high
Jul9Very high
Aug9Very high
Sep7Very high
Oct5Moderate
Nov3Moderate
Dec2Moderate

Air quality in Mersin 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 Mersin is worst in May — around 21 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMay 921 µg/m³Dec 1813 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb16Moderate
Mar20Moderate
Apr21Moderate
May21Moderate
Jun18Moderate
Jul15Moderate
Aug17Moderate
Sep17Moderate
Oct15Moderate
Nov15Moderate
Dec13Moderate
Location & terrain

Where is Mersin?

Mersin sits at 36.8°N, 34.6°E, 10 m above sea level, in Turkey. The nearest listed city is Tarsus, 25 km away.

Ereğliİmamoğlu

Topography around Mersin

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

Within 3 km, the terrain around Mersin has only modest variations in elevation — a maximum elevation change of 69 m around an average of 19 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,068 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,484 m.

The land around Mersin is covered by artificial surfaces (70%) and water (22%) within 3 km, water (37%) and trees (25%) within 16 km, and grassland (27%), trees (25%) and water (25%) within 80 km.

3 km
69 m
16 km
1,068 m
80 km
3,484 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Tarsus 25 km · Erdemli 37 km · Kireçocağı 59 km · Adana 64 km · Silifke 79 km · Taşucu 87 km · Ereğli 94 km · İmamoğlu 103 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 Mersin (36.812°, 34.6389°, elevation 10 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).