Sapanca weather in December

In December, Sapanca sees average daytime highs of 9°C and overnight lows near 2°C, with 104 mm of precipitation across 13 wet days and about 9.1 hours of daylight. It is the 11th-warmest and 1st-wettest month of the year here.

Highs ease over the month, from about 11°C in the first days to 8°C by the end. The sky is clear or mostly clear about 21% 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 Sapanca's 11th-clearest and 6th-windiest month. For the whole year in context, see Sapanca's year-round climate.

Daytime high
11th warmest
Overnight low
3rd coldest
Precipitation
104 mm
13 wet days
Daylight
9 h 06 min
7:22 AM – 4:28 PM
Cloud cover
69%
11th clearest
Wind
7 km/h
6th windiest
Solar energy
1.52 kWh/m²
Travel score
1.8
out of 10

Sapanca is district and town of Sakarya, Turkey.

Density
146/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 11°C in the first days to 8°C by the end.

A typical December day in Sapanca reaches about 9°C in the afternoon and slips back to 2°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 4°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)
1124
2114
3114
4114
5114
6113
7113
8103
9103
10103
11103
12103
1393
1492
1592
1692
1792
1892
1992
2092
2192
2292
2392
2492
2582
2682
2782
2882
2981
3081
3181

How December really feels in Sapanca

Once humidity and wind are folded in, December averages 0 days that feel above 32°C and 13 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
13
wind chill below the day's low

The story in December is cold — wind chill drags the overnight "feels like" below the raw low.

Sapanca weather by month

How December compares with the rest of the year at a glance. December is the 11th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 9813.36.69.41.2
Feb10° / 8812.95.610.41.8
Mar13° / 9713.63.211.73.1
Apr17° / 7911.70.613.15.3
May22° / 11°7810.6014.26.7
Jun26° / 15°7710.3014.97.1
Jul28° / 18°426.3014.67.2
Aug28° / 18°426.1013.66.9
Sep25° / 15°608.2012.37.4
Oct20° / 11°8910.4010.96.3
Nov15° / 779.919.74.4
Dec / 1041349.11.8

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 21% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 11% of December, with mostly cloudy or overcast conditions the remaining 68%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13664
23565
33565
43466
53466
63466
73367
83367
93367
103367
113268
123169
133169
143169
153169
163169
173268
183268
193268
203367
213268
223268
233268
243268
253268
263169
273169
283070
293070
303070
313070

Chance of precipitation in December

Any precipitationSnow

Sapanca gets around 104 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 4 days bring snow.

0%20%40%60%151015202531
Rain chance (%)Snow chance (%)
1406
2416
3417
4428
5428
6429
74210
84210
94211
104212
114212
124213
134313
144313
154314
164314
174314
184314
194314
204215
214215
224315
234315
244316
254316
264417
274418
284518
294519
304520
314520

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 7 km/h in December.

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

0246810151015202531
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

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 7:10 AM to 7:28 AM, and sunset from 4:28 PM to 4:36 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.37:104:28
29.37:114:27
39.37:124:27
49.27:134:27
59.27:134:27
69.27:144:27
79.27:154:27
89.27:164:27
99.27:174:27
109.27:184:27
119.17:194:27
129.17:194:27
139.17:204:27
149.17:214:28
159.17:214:28
169.17:224:28
179.17:234:28
189.17:234:29
199.17:244:29
209.17:244:29
219.17:254:30
229.17:254:30
239.17:264:31
249.17:264:31
259.17:274:32
269.17:274:32
279.17:274:33
289.17:284:34
299.17:284:34
309.17:284:35
319.17:284:36

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 1.52 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 1.52 kWh/m² to a high of 6.68 kWh/m² in July across the year — December's 1.52 kWh/m² sits near the bottom.

00.511.522.5151015202531
Solar energy (kWh/m²)Level
11.7Dim
21.6Dim
31.6Dim
41.6Dim
51.6Dim
61.6Dim
71.6Dim
81.6Dim
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 Sapanca?

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

1.8
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 Sapanca.

What to pack for Sapanca in December

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

In December, Sapanca sees daytime highs around 9°C and nights near 2°C. Pack a warm layer. Worth having: rain gear. About 13 days see rain.

a warm layerrain gear

Sea temperature near Sapanca in December

The nearest coast averages about 11°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 50 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 Sapanca 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 Sapanca peaks around August 10 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 highHighModerateLowAug 10UV 9Dec 21UV 2
UV index (midday)Level
Jan2Low
Feb2Moderate
Mar3Moderate
Apr7High
May7High
Jun9Very high
Jul9Very high
Aug9Very high
Sep6High
Oct4Moderate
Nov2Moderate
Dec2Low

Air quality in Sapanca 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 Sapanca 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 Sapanca?

Sapanca sits at 40.7°N, 30.3°E, 47 m above sea level, in Turkey. The nearest listed city is Adapazarı, 15 km away.

Topography around Sapanca

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

Within 3 km, the terrain around Sapanca has significant variations in elevation — a maximum elevation change of 533 m around an average of 109 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,573 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,820 m.

The land around Sapanca is covered by trees (51%) and water (34%) within 3 km, trees (71%) within 16 km, and trees (57%) within 80 km.

3 km
533 m
16 km
1,573 m
80 km
1,820 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Adapazarı 15 km · Geyve 21 km · İzmit 30 km · Akyazı 30 km · Ferizli 33 km · Gölcük 38 km · Derince 39 km · Körfez 42 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 Sapanca (40.6914°, 30.2674°, elevation 47 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).