Iași weather in January

In January, Iași sees average daytime highs of 1°C and overnight lows near -5°C, with 28 mm of precipitation across 6.5 wet days and about 8.7 hours of daylight. It is the 12th-warmest and 11th-wettest month of the year here.

Day-to-day highs hold fairly steady near 1°C through the month. The sky is clear or mostly clear about 15% of the time in January, and the air most often feels dry.

Daylight stretches from about 8 h 18 min at the start of January to 9 h 12 min by month's end. Set against the rest of the year, January is Iași's 12th-clearest and 5th-windiest month. For the whole year in context, see Iași's year-round climate.

Daytime high
12th warmest
Overnight low
-5°
1st coldest
Precipitation
28 mm
6.5 wet days
Daylight
8 h 42 min
7:58 AM – 4:39 PM
Cloud cover
74%
12th clearest
Wind
10 km/h
5th windiest
Solar energy
1.21 kWh/m²
Travel score
0.0
out of 10

Iași is city and seat of Iași County in the historical region of Moldavia in north-eastern Romania.

Air quality
High
PM2.5 27 µg/m³ · 2018
Density
4,031/km²
people per km²
Founded
1408

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 1°C through the month.

A typical January day in Iași 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 -6°C and 7°C. Set against its neighbours, January runs about 1°C cooler than December and about 2°C cooler than February.

-15°-10°-5°10°151015202531
Avg high (°C)Avg low (°C)
11-4
21-4
31-4
41-4
51-4
61-4
71-4
81-4
91-4
101-4
111-4
121-4
131-4
141-5
151-5
161-5
171-5
181-5
191-5
201-5
211-5
221-5
231-5
241-5
251-5
261-5
271-5
281-5
291-5
301-5
311-5

How January really feels in Iași

Once humidity and wind are folded in, January 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 January is cold — wind chill drags the overnight "feels like" below the raw low.

Iași weather by month

How January compares with the rest of the year at a glance. January is the 12th-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -5°286.55.18.70.0
Feb / -4°286.13.6100.0
Mar / 368.62.411.61.9
Apr16° / 458.50.313.35.2
May22° / 11°6110.4014.86.7
Jun26° / 15°7510.7015.66.6
Jul28° / 17°7210015.36.4
Aug28° / 16°497.10146.8
Sep22° / 12°507.2012.47.1
Oct15° / 446.40.110.65.1
Nov / 365.92.19.11.5
Dec / -3°357.14.28.40.0

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 15% of the time in January, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 12% of January, with mostly cloudy or overcast conditions the remaining 73%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12674
22773
32773
42674
52674
62773
72773
82773
92773
102773
112872
122872
132872
142773
152674
162773
172773
182773
192773
202773
212773
222674
232674
242674
252773
262773
272674
282674
292773
302773
312872

Chance of precipitation in January

Any precipitationSnow

Iași gets around 28 mm of rain and snow over 6.5 wet days in January. 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 5 days bring snow.

0%10%20%30%151015202531
Rain chance (%)Snow chance (%)
12317
22317
32317
42217
52116
62116
72016
82016
92015
102015
111915
121915
131915
141914
151914
161914
171914
181914
192015
202015
212116
222116
232116
242217
252217
262217
272217
282217
292216
302216
312216

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

Most of January feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, January 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 January

Winds average 10 km/h in January.

Across January, daily wind ranges from about 10 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2911calm
3011calm
3111calm

Sunrise & sunset in January

DaylightNight

Daylight runs from about 8 h 18 min at the start of January to 9 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 54 minutes over January. Sunrise moves from 8:02 AM to 7:46 AM, and sunset from 4:23 PM to 5:00 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
18.38:024:23
28.48:024:24
38.48:024:25
48.48:024:26
58.48:024:27
68.48:024:28
78.58:024:29
88.58:024:30
98.58:014:31
108.58:014:32
118.58:014:33
128.68:004:34
138.68:004:36
148.67:594:37
158.77:594:38
168.77:584:39
178.77:584:41
188.77:574:42
198.87:564:43
208.87:564:45
218.87:554:46
228.97:544:47
238.97:534:49
249.07:534:50
259.07:524:52
269.07:514:53
279.17:504:54
289.17:494:56
299.27:484:57
309.27:474:59
319.27:465:00

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 1.21 kWh/m².

For context, solar energy here swings from a low near 0.95 kWh/m² to a high of 5.92 kWh/m² in June across the year — January's 1.21 kWh/m² sits near the bottom.

00.511.522.5151015202531
Solar energy (kWh/m²)Level
11.0Dim
21.0Dim
31.0Dim
41.0Dim
51.1Dim
61.1Dim
71.1Dim
81.1Dim
91.1Dim
101.1Dim
111.1Dim
121.1Dim
131.1Dim
141.1Dim
151.2Dim
161.2Dim
171.2Dim
181.2Dim
191.2Dim
201.3Dim
211.3Dim
221.3Dim
231.3Dim
241.4Dim
251.4Dim
261.4Dim
271.4Dim
281.5Dim
291.5Dim
301.5Dim
311.6Dim
Planning a trip in January

Is January a good time to visit Iași?

Our two travel scores rate January 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
9th-best month of the year

January is a weaker month for outdoor sightseeing in Iași.

What to pack for Iași in January

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

In January, Iași sees daytime highs around 1°C and nights near -5°C. Pack a warm layer and a heavy coat. About 7 days see rain.

a warm layera heavy coat

UV index in Iași in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 1. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Iași peaks around July 17 at about 8 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 20 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 20UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar3Moderate
Apr6High
May5Moderate
Jun7Very high
Jul8Very high
Aug7Very high
Sep5High
Oct3Moderate
Nov1Low
Dec1Low

Air quality in Iași in January

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where January falls, not just the annual average.

Air quality in Iași is worst in July — around 35 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (December, 19 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Iași's WHO annual average of 27 µg/m³.

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateJul 1535 µg/m³Dec 1420 µg/m³
PM2.5 (µg/m³)Level
Jan24Moderate
Feb26Moderate
Mar34Moderate
Apr28Moderate
May28Moderate
Jun32Moderate
Jul35Moderate
Aug30Moderate
Sep25Moderate
Oct21Moderate
Nov21Moderate
Dec19Moderate
Location & terrain

Where is Iași?

Iași sits at 47.2°N, 27.6°E, 66 m above sea level, in Romania. The nearest listed city is Ungheni, 16 km away.

RomanVasluiBilicenii VechiHuşiPaşcaniBălţiStrășeni

Topography around Iași

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

Within 3 km, the terrain around Iași has only modest variations in elevation — a maximum elevation change of 114 m around an average of 74 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 396 m; within 80 km, significant variations in elevation — a maximum elevation change of 583 m.

The land around Iași is covered by artificial surfaces (44%) and trees (31%) within 3 km, cropland (38%), trees (29%) and grassland (24%) within 16 km, and cropland (47%), trees (27%) and grassland (23%) within 80 km.

3 km
114 m
16 km
396 m
80 km
583 m
treesgrasslandcroplandartificial surfaceswater
January weather nearby: Ungheni 16 km · Roman 58 km · Vaslui 60 km · Bilicenii Vechi 64 km · Huşi 65 km · Paşcani 67 km · Bălţi 71 km · Strășeni 76 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 Iași (47.1667°, 27.6°, elevation 66 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).