Bacău weather in December

In December, Bacău sees average daytime highs of 2°C and overnight lows near -4°C, with 36 mm of precipitation across 6.7 wet days and about 8.4 hours of daylight. It is the 11th-warmest and 9th-wettest month of the year here.

Highs ease over the month, from about 4°C in the first days to 1°C by the end. The sky is clear or mostly clear about 22% of the time in December, and the air most often feels dry.

Daylight stretches from about 8 h 36 min at the start of December to 8 h 24 min by month's end. Set against the rest of the year, December is Bacău's 10th-clearest and 8th-windiest month. For the whole year in context, see Bacău's year-round climate.

Daytime high
11th warmest
Overnight low
-4°
3rd coldest
Precipitation
36 mm
6.7 wet days
Daylight
8 h 24 min
7:57 AM – 4:20 PM
Cloud cover
68%
10th clearest
Wind
9 km/h
8th windiest
Solar energy
1.09 kWh/m²
Travel score
0.0
out of 10

Bacău is locality in Bacău County, Romania.

Air quality
Moderate
PM2.5 12.9 µg/m³ · 2010

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 4°C in the first days to 1°C by the end.

A typical December day in Bacău reaches about 2°C in the afternoon and slips back to -4°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 8°C. Set against its neighbours, December runs about 6°C cooler than November and about 1°C warmer than January.

-15°-10°-5°10°151015202531
Avg high (°C)Avg low (°C)
14-1
24-2
34-2
44-2
54-2
63-2
73-2
83-3
93-3
103-3
113-3
123-3
133-3
142-3
152-4
162-4
172-4
182-4
192-4
202-4
212-4
222-4
232-4
242-4
252-5
262-5
272-5
282-5
292-5
301-5
311-5

How December really feels in Bacău

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.

Bacău 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 / -5°305.85.48.80.0
Feb / -4°286.34.6100.1
Mar / 398.12.711.62.0
Apr16° / 4890.413.35.0
May22° / 11°6410.1014.86.6
Jun25° / 15°8110.3015.66.8
Jul27° / 16°708.7015.26.8
Aug27° / 16°446.30147.2
Sep22° / 11°466.4012.47.3
Oct15° / 4460.110.75.2
Nov / 355.729.21.6
Dec / -4°366.74.48.40.0

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 22% 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 65%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13367
23367
33466
43466
53466
63466
73466
83466
93466
103466
113565
123565
133565
143565
153565
163565
173664
183565
193565
203664
213664
223664
233565
243664
253664
263664
273664
283565
293565
303664
313565

Chance of precipitation in December

Any precipitationSnow

Bacău gets around 36 mm of rain and snow over 6.7 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 21% and peaks near 23% on the wettest days, and about 4 days bring snow.

0%10%20%30%151015202531
Rain chance (%)Snow chance (%)
12312
22312
32312
42312
52212
62212
72212
82213
92213
102113
112113
122113
132114
142114
152114
162015
172015
182015
192015
202015
212116
222116
232116
242116
252116
262116
272216
282217
292217
302217
312218

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 9 km/h in December.

Across December, daily wind ranges from about 9 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm
319calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 8 h 36 min at the start of December to 8 h 24 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 7:43 AM to 8:03 AM, and sunset from 4:21 PM to 4:28 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
18.67:434:21
28.67:444:21
38.67:454:21
48.67:464:20
58.67:474:20
68.57:484:20
78.57:494:20
88.57:504:20
98.57:514:20
108.57:524:20
118.47:534:20
128.47:544:20
138.47:554:20
148.47:554:20
158.47:564:20
168.47:574:20
178.47:584:20
188.47:584:21
198.47:594:21
208.47:594:21
218.48:004:22
228.48:004:22
238.48:014:23
248.48:014:23
258.48:024:24
268.48:024:24
278.48:024:25
288.48:024:26
298.48:034:27
308.48:034:27
318.48:034:28

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 1.09 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 1.09 kWh/m² to a high of 5.86 kWh/m² in June across the year — December's 1.09 kWh/m² sits near the bottom.

00.511.52151015202531
Solar energy (kWh/m²)Level
11.1Dim
21.1Dim
31.1Dim
41.1Dim
51.1Dim
61.1Dim
71.1Dim
81.1Dim
91.1Dim
101.1Dim
111.1Dim
121.1Dim
131.1Dim
141.1Dim
151.1Dim
161.1Dim
171.1Dim
181.1Dim
191.1Dim
201.1Dim
211.1Dim
221.1Dim
231.1Dim
241.1Dim
251.1Dim
261.1Dim
271.1Dim
281.1Dim
291.1Dim
301.1Dim
311.2Dim
Planning a trip in December

Is December a good time to visit Bacău?

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

0.0
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 Bacău.

What to pack for Bacău in December

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

In December, Bacău sees daytime highs around 2°C and nights near -4°C. Pack a warm layer and a heavy coat. About 7 days see rain.

a warm layera heavy coat

UV index in Bacău 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 Bacău peaks around July 17 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 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 19UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar3Moderate
Apr7High
May6High
Jun8Very high
Jul8Very high
Aug8Very high
Sep5High
Oct3Moderate
Nov1Low
Dec1Low

Air quality in Bacău 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 Bacău is worst in July — around 16 µg/m³ PM2.5 (moderate), about 1.7× the cleanest month (December, 9 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Bacău's WHO annual average of 12.9 µg/m³.

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodJul 1516 µg/m³Dec 149 µg/m³
PM2.5 (µg/m³)Level
Jan12Moderate
Feb12Moderate
Mar16Moderate
Apr14Moderate
May14Moderate
Jun15Moderate
Jul16Moderate
Aug14Moderate
Sep12Good
Oct10Good
Nov11Good
Dec9Good
Location & terrain

Where is Bacău?

Bacău sits at 46.6°N, 26.9°E, 165 m above sea level, in Romania. The nearest listed city is Buhuşi, 23 km away.

AdjudPiatra NeamţVasluiBârlad

Topography around Bacău

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

Within 3 km, the terrain around Bacău has only modest variations in elevation — a maximum elevation change of 82 m around an average of 167 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 591 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,614 m.

The land around Bacău is covered by artificial surfaces (43%) within 3 km, trees (38%), cropland (33%) and grassland (21%) within 16 km, and trees (45%), cropland (32%) and grassland (21%) within 80 km.

3 km
82 m
16 km
591 m
80 km
1,614 m
treesgrasslandcroplandartificial surfaceswaterwetland
December weather nearby: Buhuşi 23 km · Moineşti 34 km · Roman 39 km · Comăneşti 40 km · Adjud 56 km · Piatra Neamţ 59 km · Vaslui 63 km · Bârlad 69 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 Bacău (46.5672°, 26.9138°, elevation 165 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).