Sinaia weather in December

In December, Sinaia sees average daytime highs of 1°C and overnight lows near -5°C, with 49 mm of precipitation across 7.8 wet days and about 8.6 hours of daylight. It is the 11th-warmest and 9th-wettest month of the year here.

Highs ease over the month, from about 3°C in the first days to 0°C by the end. The sky is clear or mostly clear about 28% of the time in December, and the air most often feels dry.

Daylight stretches from about 8 h 48 min at the start of December to 8 h 36 min by month's end. Set against the rest of the year, December is Sinaia's 6th-clearest and 5th-windiest month. For the whole year in context, see Sinaia's year-round climate.

Daytime high
11th warmest
Overnight low
-5°
3rd coldest
Precipitation
49 mm
7.8 wet days
Daylight
8 h 36 min
7:57 AM – 4:30 PM
Cloud cover
63%
6th clearest
Wind
6 km/h
5th windiest
Solar energy
1.32 kWh/m²
Travel score
0.0
out of 10

Sinaia is locality in Prahova County, Romania.

Founded
1690

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 3°C in the first days to 0°C by the end.

A typical December day in Sinaia reaches about 1°C in the afternoon and slips back to -5°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between -4°C and 7°C. Set against its neighbours, December runs about 5°C cooler than November and about 1°C warmer than January.

-15°-10°-5°10°151015202531
Avg high (°C)Avg low (°C)
13-3
23-3
33-3
43-3
52-4
62-4
72-4
82-4
92-4
102-4
111-5
121-5
131-5
141-5
151-5
161-5
171-5
181-5
191-6
201-6
211-6
221-6
231-6
241-6
251-6
261-6
270-6
280-6
290-6
300-6
310-6

How December really feels in Sinaia

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.

Sinaia 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 / -7°428.17.98.90.0
Feb / -5°387.7710.10.0
Mar / -2°5711.27.511.60.6
Apr12° / 8414.62.713.22.7
May17° / 12918.80.414.64.3
Jun21° / 11°14419.1015.45.0
Jul23° / 12°13218.1015.15.7
Aug23° / 12°10115.3013.96.2
Sep18° / 7110.4012.35.8
Oct13° / 618.71.510.73.6
Nov / -1°4884.29.30.9
Dec / -5°497.86.38.60.0

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 28% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 12% of December, with mostly cloudy or overcast conditions the remaining 60%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13961
23961
34060
44060
54060
64060
74060
83961
93961
103961
114060
124060
134159
144159
154060
164060
174060
184060
194159
204159
214159
224159
234159
244159
254159
264159
274060
284159
294159
304159
314060

Chance of precipitation in December

Any precipitationSnow

Sinaia gets around 49 mm of rain and snow over 7.8 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 26% and peaks near 28% on the wettest days, and about 6 days bring snow.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
12818
22718
32718
42618
52618
62619
72619
82519
92519
102520
112520
122521
132521
142521
152522
162522
172522
182622
192622
202622
212622
222622
232622
242622
252622
262623
272623
282623
292624
302624
312624

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
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 8 h 48 min at the start of December to 8 h 36 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 7:44 AM to 8:04 AM, and sunset from 4:31 PM to 4:38 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
18.87:444:31
28.87:454:31
38.77:464:31
48.77:474:30
58.77:484:30
68.77:494:30
78.77:504:30
88.67:514:30
98.67:524:30
108.67:534:30
118.67:544:30
128.67:544:30
138.67:554:30
148.67:564:30
158.67:574:30
168.67:574:30
178.57:584:31
188.57:594:31
198.57:594:31
208.58:004:32
218.58:004:32
228.58:014:33
238.58:014:33
248.58:024:34
258.58:024:34
268.58:024:35
278.58:034:35
288.68:034:36
298.68:034:37
308.68:034:38
318.68:044:38

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 1.32 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 1.32 kWh/m² to a high of 5.77 kWh/m² in July across the year — December's 1.32 kWh/m² sits near the bottom.

00.511.52151015202531
Solar energy (kWh/m²)Level
11.4Dim
21.4Dim
31.4Dim
41.4Dim
51.3Dim
61.3Dim
71.3Dim
81.3Dim
91.3Dim
101.3Dim
111.3Dim
121.3Dim
131.3Dim
141.3Dim
151.3Dim
161.3Dim
171.3Dim
181.3Dim
191.3Dim
201.3Dim
211.3Dim
221.3Dim
231.3Dim
241.3Dim
251.3Dim
261.4Dim
271.4Dim
281.4Dim
291.4Dim
301.4Dim
311.4Dim
Planning a trip in December

Hazard calendar for Sinaia

In seasonPeak

None of Sinaia's seasonal hazards are active in December. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Sinaia's rainy season runs April–September, 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 Sinaia?

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

0.0
Sightseeing
10th-best month of the year
0.0
Beach & pool
8th-best month of the year

December is a weaker month for outdoor sightseeing in Sinaia.

What to pack for Sinaia in December

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

In December, Sinaia sees daytime highs around 1°C and nights near -5°C. Pack a warm layer and a heavy coat. About 8 days see rain.

a warm layera heavy coat

UV index in Sinaia 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 Sinaia peaks around July 17 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 7 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJul 17UV 8Dec 22UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar4Moderate
Apr8Very high
May6High
Jun8Very high
Jul8Very high
Aug8Very high
Sep6High
Oct3Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Sinaia?

Sinaia sits at 45.4°N, 25.6°E, 0 m above sea level, in Romania. The nearest listed city is Breaza, 21 km away.

Moreni

Topography around Sinaia

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

Within 3 km, the terrain around Sinaia has large variations in elevation — a maximum elevation change of 880 m around an average of 1,039 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,981 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,409 m.

The land around Sinaia is covered by trees (92%) within 3 km, trees (75%) and grassland (23%) within 16 km, and trees (61%) within 80 km.

3 km
880 m
16 km
1,981 m
80 km
2,409 m
treesgrasslandcroplandartificial surfaces
December weather nearby: Breaza 21 km · Râşnov 27 km · Câmpina 29 km · Zărnești 30 km · Săcele 32 km · Brasov 33 km · Codlea 40 km · Moreni 41 km

Romania travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / F
230 V · 50 Hz
Prices
≈ 44% of US
price level, 2025
GDP per capita
$22,538
2025
Happiness
6.6 / 10
World Happiness, 2025
Safe drinking water
82%
of population, 2024
Homicide rate
1.1
per 100k, 2023
Road deaths
10.3
per 100k/yr, 2019
Income group
High
World Bank
English
Very high
EF EPI 605
Religion
Romanian Orthodox 85%other 5%Roman Catholic 5%Reformed 3%

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 Sinaia (45.35°, 25.55°, elevation 0 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).