Ayvalık weather in December

In December, Ayvalık sees average daytime highs of 12°C and overnight lows near 9°C, with 145 mm of precipitation across 12.3 wet days and about 9.3 hours of daylight. It is the 10th-warmest and 1st-wettest month of the year here.

Highs ease over the month, from about 14°C in the first days to 11°C by the end. The sky is clear or mostly clear about 33% of the time in December, and the air most often feels dry.

Daylight stretches from about 9 h 24 min at the start of December to 9 h 18 min by month's end. Set against the rest of the year, December is Ayvalık's 12th-clearest and 1st-windiest month. For the whole year in context, see Ayvalık's year-round climate.

Daytime high
12°
10th warmest
Overnight low
4th coldest
Precipitation
145 mm
12.3 wet days
Daylight
9 h 12 min
7:32 AM – 4:47 PM
Cloud cover
56%
12th clearest
Wind
22 km/h
1st windiest
Solar energy
1.84 kWh/m²
Travel score
3.2
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 14°C in the first days to 11°C by the end.

A typical December day in Ayvalık reaches about 12°C in the afternoon and slips back to 9°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 8°C and 16°C. Set against its neighbours, December runs about 4°C cooler than November and about 1°C warmer than January.

10°15°20°151015202531
Avg high (°C)Avg low (°C)
11411
21411
31411
41410
51310
61310
71310
81310
91310
101310
111310
12139
13129
14129
15129
16129
17129
18129
19129
20129
21129
22129
23129
24129
25129
26129
27129
28129
29129
30119
31119

Ayvalık 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
Jan11° / 13711.49.52.7
Feb12° / 12210.810.52.9
Mar13° / 849.111.74.0
Apr16° / 12°647.2135.8
May21° / 16°343.914.17.8
Jun25° / 20°101.614.79.0
Jul27° / 23°10.214.59.1
Aug27° / 23°20.213.59.1
Sep24° / 20°262.812.38.9
Oct20° / 17°785.6117.5
Nov16° / 13°1228.89.85.4
Dec12° / 14512.39.33.2

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 33% of the time in December, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 17% of December, with mostly cloudy or overcast conditions the remaining 49%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15446
25347
35347
45347
55347
65248
75347
85347
95347
105347
115347
125347
135347
145347
155248
165248
175248
185248
195149
205050
215050
225050
234951
244852
254951
264951
274753
284753
294753
304852
314852

Chance of precipitation in December

Any precipitation

Ayvalık gets around 145 mm of rain and snow over 12.3 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 40% and peaks near 42% on the wettest days, and about 0 day brings snow.

0%10%20%30%40%50%151015202531
Rain chance (%)
136
237
337
437
538
638
739
839
940
1040
1141
1241
1341
1442
1542
1642
1741
1841
1941
2041
2141
2241
2341
2441
2541
2641
2741
2841
2941
3041
3140

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 95% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)
18812
28911
39010
49010
5919
6928
7937
8946
9946
10955
11964
12964
13973
14973
15973
16973
17973
18973
19964
20964
21964
22964
23964
24964
25964
26964
27964
28964
29964
30964
31973

Wind in December

Winds average 22 km/h in December, the windiest month of the year.

Across December, daily wind ranges from about 20 km/h on the calmest days to 22 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202531
Wind speed (km/h)Feels
120breezy
221breezy
321breezy
421breezy
521breezy
621breezy
721breezy
821breezy
921breezy
1021breezy
1121breezy
1221breezy
1321breezy
1421breezy
1521breezy
1621breezy
1721breezy
1822breezy
1922breezy
2022breezy
2122breezy
2222breezy
2322breezy
2422breezy
2522breezy
2622breezy
2722breezy
2822breezy
2922breezy
3022breezy
3122breezy

Sunrise & sunset in December

DaylightNight

Daylight runs from about 9 h 24 min at the start of December to 9 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 6 minutes over December. Sunrise moves from 7:20 AM to 7:38 AM, and sunset from 4:46 PM to 4:54 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.47:204:46
29.47:214:46
39.47:224:46
49.47:234:46
59.47:244:45
69.37:254:45
79.37:254:45
89.37:264:45
99.37:274:45
109.37:284:46
119.37:294:46
129.37:294:46
139.37:304:46
149.37:314:46
159.37:314:46
169.27:324:47
179.27:334:47
189.27:334:47
199.27:344:48
209.27:344:48
219.27:354:49
229.27:354:49
239.27:364:49
249.27:364:50
259.27:374:51
269.27:374:51
279.27:374:52
289.27:384:52
299.37:384:53
309.37:384:54
319.37:384:54

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 1.84 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 1.84 kWh/m² to a high of 7.61 kWh/m² in July across the year — December's 1.84 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.0Moderate
22.0Moderate
32.0Dim
42.0Dim
51.9Dim
61.9Dim
71.9Dim
81.9Dim
91.9Dim
101.9Dim
111.9Dim
121.9Dim
131.9Dim
141.8Dim
151.8Dim
161.8Dim
171.8Dim
181.8Dim
191.8Dim
201.8Dim
211.8Dim
221.8Dim
231.8Dim
241.8Dim
251.8Dim
261.8Dim
271.8Dim
281.8Dim
291.8Dim
301.8Dim
311.9Dim
Planning a trip in December

Hazard calendar for Ayvalık

In seasonPeak

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

Ayvalık's rainy season runs October–March, 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 Ayvalık?

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

3.2
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 Ayvalık.

What to pack for Ayvalık in December

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

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

a warm layerrain geara windbreaker

Sea temperature near Ayvalık in December

The nearest coast averages about 17°C in December — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in August at about 23°C and coldest in February near 15°C.

It's comfortable for a long swim from May 31 to Oct 20 — about 4.7 months when the water holds above 20°C.

15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan15Cool
Feb15Bracing
Mar15Cool
Apr16Cool
May19Cool
Jun22Refreshing
Jul23Refreshing
Aug23Refreshing
Sep22Refreshing
Oct20Refreshing
Nov18Cool
Dec17Cool

UV index in Ayvalık 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 Ayvalık peaks around August 10 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateVery highModerateLowAug 10UV 9Dec 23UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr8Very high
May7Very high
Jun9Very high
Jul9Very high
Aug9Very high
Sep7High
Oct4Moderate
Nov3Moderate
Dec2Low

Air quality in Ayvalık 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 Ayvalık is worst in March — around 18 µg/m³ PM2.5 (moderate), about 1.7× the cleanest month (December, 11 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateGoodMar 2117 µg/m³Dec 1811 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb14Moderate
Mar18Moderate
Apr17Moderate
May17Moderate
Jun15Moderate
Jul12Moderate
Aug13Moderate
Sep12Good
Oct12Good
Nov13Moderate
Dec11Good
Location & terrain

Where is Ayvalık?

Ayvalık sits at 39.3°N, 26.7°E, 8 m above sea level, in Turkey. The nearest listed city is Mytilene, 26 km away.

Topography around Ayvalık

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

Within 3 km, the terrain around Ayvalık has only modest variations in elevation — a maximum elevation change of 121 m around an average of 20 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 429 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,759 m.

The land around Ayvalık is covered by water (32%) and grassland (24%) within 3 km, water (60%) and trees (21%) within 16 km, and trees (39%) and water (35%) within 80 km.

3 km
121 m
16 km
429 m
80 km
1,759 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Mytilene 26 km · Burhaniye 31 km · Edremit 42 km · Bergama 47 km · Ezine 60 km · Aliağa 63 km · Foça 72 km · Soma 80 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 Ayvalık (39.3193°, 26.6934°, elevation 8 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).