Bilecik weather in December

In December, Bilecik sees average daytime highs of 9°C and overnight lows near 1°C, with 62 mm of precipitation across 10.3 wet days and about 9.2 hours of daylight. It is the 11th-warmest and 2nd-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 24% 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 12 min by month's end. Set against the rest of the year, December is Bilecik's 10th-clearest and 5th-windiest month. For the whole year in context, see Bilecik's year-round climate.

Daytime high
11th warmest
Overnight low
3rd coldest
Precipitation
62 mm
10.3 wet days
Daylight
9 h 12 min
7:21 AM – 4:31 PM
Cloud cover
66%
10th clearest
Wind
6 km/h
5th windiest
Solar energy
1.63 kWh/m²
Travel score
1.8
out of 10

Bilecik is central district and city in Bilecik Province, Turkey.

Air quality
Elevated
PM2.5 17.5 µg/m³ · 2019

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 Bilecik reaches about 9°C in the afternoon and slips back to 1°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 3°C and 15°C. Set against its neighbours, December runs about 6°C cooler than November and about 2°C warmer than January.

-5°10°15°20°151015202531
Avg high (°C)Avg low (°C)
1113
2113
3113
4113
5112
6102
7102
8102
9102
10102
1192
1292
1391
1491
1591
1691
1791
1881
1981
2081
2181
2281
2381
2481
2581
2681
2781
2881
2981
3081
3181

How December really feels in Bilecik

Once humidity and wind are folded in, December averages 0 days that feel above 32°C and 22 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
22
wind chill below the day's low

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

Bilecik weather by month

How December compares with the rest of the year at a glance. December is the 11th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -0°5810.35.49.51.0
Feb / 5310.24.610.41.9
Mar13° / 6411.22.911.73.4
Apr18° / 5610.50.6135.7
May23° / 11°499.4014.27.1
Jun27° / 15°387.7014.87.1
Jul30° / 17°153.8014.66.3
Aug30° / 18°133.2013.66.1
Sep27° / 14°245012.37.7
Oct21° / 10°447.1010.97.1
Nov15° / 447.81.19.84.7
Dec / 6210.33.89.21.8

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 24% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 13% of December, with mostly cloudy or overcast conditions the remaining 63%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14357
24258
34258
44159
54159
63961
73961
83961
93961
103862
113862
123862
133763
143763
153763
163664
173664
183664
193763
203664
213664
223664
233664
243664
253664
263565
273565
283466
293466
303367
313367

Chance of precipitation in December

Any precipitationSnow

Bilecik gets around 62 mm of rain and snow over 10.3 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 34% and peaks near 36% on the wettest days, and about 4 days bring snow.

0%10%20%30%40%50%151015202531
Rain chance (%)Snow chance (%)
1337
2337
3338
4348
5349
6349
73410
83510
93511
103511
113512
123612
133613
143613
153613
163614
173614
183514
193514
203514
213414
223414
233314
243314
253315
263315
273415
283416
293416
303417
313517

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 6 km/h in December.

Across December, daily wind ranges from about 6 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 9 h 24 min at the start of December to 9 h 12 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 7:09 AM to 7:28 AM, and sunset from 4:30 PM to 4:39 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.47:094:30
29.37:104:30
39.37:114:30
49.37:124:30
59.37:134:30
69.37:144:30
79.37:154:30
89.27:164:30
99.27:164:30
109.27:174:30
119.27:184:30
129.27:194:30
139.27:194:30
149.27:204:30
159.27:214:31
169.27:214:31
179.27:224:31
189.17:234:32
199.17:234:32
209.17:244:32
219.17:244:33
229.17:254:33
239.17:254:34
249.17:264:34
259.17:264:35
269.17:264:35
279.27:274:36
289.27:274:37
299.27:274:37
309.27:284:38
319.27:284:39

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 1.63 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 1.63 kWh/m² to a high of 6.89 kWh/m² in July across the year — December's 1.63 kWh/m² sits near the bottom.

00.511.522.5151015202531
Solar energy (kWh/m²)Level
11.8Dim
21.8Dim
31.8Dim
41.8Dim
51.7Dim
61.7Dim
71.7Dim
81.7Dim
91.7Dim
101.6Dim
111.6Dim
121.6Dim
131.6Dim
141.6Dim
151.6Dim
161.6Dim
171.6Dim
181.6Dim
191.6Dim
201.6Dim
211.6Dim
221.6Dim
231.6Dim
241.6Dim
251.6Dim
261.6Dim
271.6Dim
281.6Dim
291.6Dim
301.6Dim
311.6Dim
Planning a trip in December

Is December a good time to visit Bilecik?

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

1.8
Sightseeing
11th-best month of the year
0.0
Beach & pool
10th-best month of the year

December is a weaker month for outdoor sightseeing in Bilecik.

What to pack for Bilecik in December

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

In December, Bilecik sees daytime highs around 9°C and nights near 1°C. Pack a warm layer. Worth having: rain gear. About 10 days see rain.

a warm layerrain gear

UV index in Bilecik 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 Bilecik peaks around August 10 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 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 20UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar3Moderate
Apr7Very high
May7Very high
Jun9Very high
Jul9Very high
Aug9Very high
Sep7Very high
Oct4Moderate
Nov3Moderate
Dec2Low

Air quality in Bilecik 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 Bilecik is worst in March — around 24 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (December, 13 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Bilecik's WHO annual average of 17.5 µg/m³.

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMar 2324 µg/m³Dec 1913 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb17Moderate
Mar24Moderate
Apr24Moderate
May24Moderate
Jun19Moderate
Jul15Moderate
Aug16Moderate
Sep15Moderate
Oct15Moderate
Nov15Moderate
Dec13Moderate
Location & terrain

Where is Bilecik?

Bilecik sits at 40.1°N, 30.0°E, 517 m above sea level, in Turkey. The nearest listed city is Osmaneli, 24 km away.

Topography around Bilecik

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

Within 3 km, the terrain around Bilecik has significant variations in elevation — a maximum elevation change of 481 m around an average of 500 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,136 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,526 m.

The land around Bilecik is covered by trees (34%) and grassland (32%) within 3 km, trees (55%) and grassland (22%) within 16 km, and trees (54%) and grassland (21%) within 80 km.

3 km
481 m
16 km
1,136 m
80 km
2,526 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Osmaneli 24 km · Bozüyük 26 km · Yenişehir 31 km · İznik 39 km · İnegol 40 km · Akhisar 44 km · Geyve 49 km · Eskişehir 61 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 Bilecik (40.1419°, 29.9793°, elevation 517 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. 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).