Troyan weather in December

In December, Troyan sees average daytime highs of 5°C and overnight lows near -2°C, with 60 mm of precipitation across 9.7 wet days and about 8.9 hours of daylight. It is the 11th-warmest and 9th-wettest month of the year here.

Highs ease over the month, from about 6°C in the first days to 4°C by the end. The sky is clear or mostly clear about 30% of the time in December, and the air most often feels dry.

Daylight stretches from about 9 h 06 min at the start of December to 8 h 54 min by month's end. Set against the rest of the year, December is Troyan's 12th-clearest and 5th-windiest month. For the whole year in context, see Troyan's year-round climate.

Daytime high
11th warmest
Overnight low
-2°
3rd coldest
Precipitation
60 mm
9.7 wet days
Daylight
8 h 54 min
7:52 AM – 4:43 PM
Cloud cover
62%
12th clearest
Wind
6 km/h
5th windiest
Solar energy
1.45 kWh/m²
Travel score
0.1
out of 10

Troyan is city in Troyan municipality, Lovech oblast, Bulgaria.

Density
351/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 6°C in the first days to 4°C by the end.

A typical December day in Troyan reaches about 5°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 -2°C and 11°C. Set against its neighbours, December runs about 6°C cooler than November and about 1°C warmer than January.

-10°10°151015202531
Avg high (°C)Avg low (°C)
170
260
360
46-1
56-1
66-1
75-1
85-1
95-1
105-2
115-2
125-2
135-2
145-2
154-2
164-2
174-2
184-3
194-3
204-3
214-3
224-3
234-3
244-3
254-3
264-3
274-3
284-3
294-3
304-3
314-3

How December really feels in Troyan

Once humidity and wind are folded in, December averages 0 days that feel above 32°C and 31 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
31
wind chill below the day's low

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

Troyan weather by month

How December compares with the rest of the year at a glance. December is the 11th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -4°538.66.59.20.0
Feb / -2°538.7610.20.4
Mar10° / 75125.111.62.2
Apr16° / 9013.11.213.14.4
May20° / 10°12215014.45.7
Jun24° / 14°10914.2015.16.3
Jul26° / 16°10411.5014.86.8
Aug27° / 15°668.4013.87.3
Sep22° / 12°738.9012.37.1
Oct16° / 618.50.710.85.4
Nov10° / 507.82.39.52.4
Dec / -2°609.768.90.1

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 30% of the time in December, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 14% of December, with mostly cloudy or overcast conditions the remaining 57%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14159
24159
34258
44159
54159
64159
74258
84357
94357
104456
114357
124357
134456
144456
154555
164555
174555
184555
194555
204555
214555
224555
234456
244555
254555
264555
274555
284456
294357
304357
314456

Chance of precipitation in December

Any precipitationSnow

Troyan gets around 60 mm of rain and snow over 9.7 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 31% and peaks near 32% on the wettest days, and about 6 days bring snow.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
13213
23214
33214
43215
53215
63216
73116
83117
93117
103118
113019
123019
133020
143020
153021
163021
173021
183022
193122
203122
213122
223122
233222
243222
253222
263222
273222
283222
293222
303223
313223

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 7 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
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 9 h 06 min at the start of December to 8 h 54 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 7:39 AM to 7:58 AM, and sunset from 4:43 PM to 4:51 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.17:394:43
29.17:404:43
39.07:414:43
49.07:424:42
59.07:434:42
69.07:444:42
79.07:454:42
88.97:454:42
98.97:464:42
108.97:474:42
118.97:484:42
128.97:494:42
138.97:504:42
148.97:504:42
158.97:514:43
168.97:524:43
178.87:524:43
188.87:534:43
198.87:544:44
208.87:544:44
218.87:554:45
228.87:554:45
238.87:564:46
248.87:564:46
258.87:564:47
268.87:574:47
278.87:574:48
288.97:574:49
298.97:584:49
308.97:584:50
318.97:584:51

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 1.45 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 1.45 kWh/m² to a high of 6.34 kWh/m² in June across the year — December's 1.45 kWh/m² sits near the bottom.

00.511.522.5151015202531
Solar energy (kWh/m²)Level
11.5Dim
21.5Dim
31.5Dim
41.5Dim
51.5Dim
61.4Dim
71.4Dim
81.4Dim
91.4Dim
101.4Dim
111.4Dim
121.4Dim
131.4Dim
141.4Dim
151.4Dim
161.4Dim
171.4Dim
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 Troyan?

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

0.1
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 Troyan.

What to pack for Troyan in December

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

In December, Troyan sees daytime highs around 5°C and nights near -2°C. Pack a warm layer and a heavy coat. Worth having: rain gear. About 10 days see rain.

a warm layera heavy coatrain gear

UV index in Troyan 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 Troyan peaks around July 15 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 1 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateVery highVery highHighModerateLowJul 15UV 9Dec 21UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar3Moderate
Apr8Very high
May7High
Jun9Very high
Jul9Very high
Aug9Very high
Sep6High
Oct4Moderate
Nov2Low
Dec1Low

Air quality in Troyan 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 Troyan is worst in March — around 16 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodMar 2016 µg/m³Dec 1411 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb13Moderate
Mar16Moderate
Apr15Moderate
May14Moderate
Jun14Moderate
Jul14Moderate
Aug13Moderate
Sep12Good
Oct11Good
Nov12Good
Dec10Good
Location & terrain

Where is Troyan?

Troyan sits at 42.9°N, 24.7°E, 389 m above sea level, in Bulgaria. The nearest listed city is Lovech, 26 km away.

KarlovoSevlievoGabrovoPlevenPanagyurishteKazanlakRakovski

Topography around Troyan

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

Within 3 km, the terrain around Troyan has significant variations in elevation — a maximum elevation change of 353 m around an average of 474 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,460 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,343 m.

The land around Troyan is covered by trees (73%) within 3 km, trees (83%) within 16 km, and trees (51%) and cropland (32%) within 80 km.

3 km
353 m
16 km
1,460 m
80 km
2,343 m
treesgrasslandcroplandartificial surfaces
December weather nearby: Lovech 26 km · Karlovo 30 km · Sevlievo 35 km · Gabrovo 49 km · Pleven 59 km · Panagyurishte 62 km · Kazanlak 64 km · Rakovski 70 km

Bulgaria travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / F
230 V · 50 Hz
Prices
≈ 23% of US
price level, 2025
GDP per capita
$20,328
2025
Happiness
5.7 / 10
World Happiness, 2025
Safe drinking water
96%
of population, 2024
Homicide rate
1.1
per 100k, 2023
Road deaths
9.2
per 100k/yr, 2019
Income group
High
World Bank
English
High
EF EPI 594
Religion
Christian 65%Muslim 10%none 5%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 Troyan (42.8943°, 24.7159°, elevation 389 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).