Iaşi climate

Name: Iaşi
Address: RO

Iaşi is warmest in July, with average highs of 27 °C, and coldest in January, when nights average -5.5 °C. June is the wettest month (75 mm) and February the driest (29 mm). Figures are 1991–2020 climate normals.

Across a full year Iaşi averages 568 mm of rain, 75 days above 25 °C and 101 days below freezing.

Romania · population 378,954 · 1991–2020 normals

Temperature below 0 °C to above 30 °C Rain band height is that month’s share of the wettest month

Warmest month July 27 °C
Coldest month January -5.5 °C
Driest month February 29 mm
Wettest month June 75 mm
Least cloud August 40 % cloud
Hottest on record July 40 °C
Coldest on record December -30 °C

What to expectIaşi through the year

Iaşi has a clear annual cycle: average daily highs run from 1.5 °C in January to 27 °C in July, a swing of 25 °C in mean temperature across the year.

Counted across a normal year, 75 days a year reach 25 °C, 20 of them reach 30 °C, 101 nights drop below freezing. The warmest reading in the 1991–2020 record is 40 °C, in July.

Rain is strongly seasonal. June averages 75 mm against 29 mm in February — 2.6 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	1.5 °C	29 mm	73 %
February	3.9 °C	29 mm	72 %
March	9.3 °C	37 mm	64 %
April	16.1 °C	45 mm	59 %
May	21.8 °C	63 mm	55 %
June	25.4 °C	75 mm	52 %
July	27.4 °C	74 mm	44 %
August	27.1 °C	49 mm	40 %
September	21.5 °C	50 mm	52 %
October	15.1 °C	44 mm	58 %
November	8.3 °C	37 mm	71 %
December	2.8 °C	35 mm	73 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C	Days below 0 °C
January	1.5 °C	-5.5 °C	-1.9 °C	13.7 °C	-26.8 °C	0	0	26
February	3.9 °C	-4.3 °C	-0.2 °C	18.2 °C	-24.8 °C	0	0	22
March	9.3 °C	-0.3 °C	4.5 °C	22.4 °C	-17.0 °C	0	0	16
April	16.1 °C	5.4 °C	11.0 °C	29.3 °C	-4.6 °C	1	0	2
May	21.8 °C	11.1 °C	16.8 °C	33.4 °C	2.2 °C	7	1	0
June	25.4 °C	15.5 °C	20.7 °C	36.2 °C	6.9 °C	16	3	0
July	27.4 °C	17.5 °C	22.7 °C	39.6 °C	10.3 °C	22	8	0
August	27.1 °C	17.1 °C	22.2 °C	38.8 °C	8.5 °C	21	7	0
September	21.5 °C	12.2 °C	16.9 °C	35.7 °C	2.4 °C	7	1	0
October	15.1 °C	6.7 °C	10.8 °C	29.5 °C	-4.6 °C	1	0	2
November	8.3 °C	1.8 °C	4.9 °C	24.2 °C	-19.9 °C	0	0	10
December	2.8 °C	-3.3 °C	-0.3 °C	15.9 °C	-29.7 °C	0	0	23

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	29 mm	7	8.9 h/day	73 %	82 %	14 km/h
February	29 mm	6	10 h/day	72 %	78 %	15 km/h
March	37 mm	8	12 h/day	64 %	72 %	16 km/h
April	45 mm	8	14 h/day	59 %	67 %	16 km/h
May	63 mm	10	15 h/day	55 %	65 %	15 km/h
June	75 mm	10	16 h/day	52 %	66 %	14 km/h
July	74 mm	10	16 h/day	44 %	65 %	14 km/h
August	49 mm	7	14 h/day	40 %	63 %	13 km/h
September	50 mm	7	13 h/day	52 %	67 %	14 km/h
October	44 mm	7	11 h/day	58 %	75 %	14 km/h
November	37 mm	6	9.4 h/day	71 %	81 %	14 km/h
December	35 mm	7	8.5 h/day	73 %	82 %	14 km/h

How Iaşi compares

The same four figures for nearby destinations, so the numbers above have something to be read against. Summer high is the warmest month's average high; winter low is the coldest month's average low.

Destination	Summer high	Winter low	Rain per year	Days above 25 °C
Iaşi	27 °C	-5.5 °C	568 mm	75
Chisinau · Moldova	28 °C	-4.7 °C	538 mm	80
Tiraspol · Moldova	29 °C	-4.6 °C	463 mm	86
Chernivtsi · Ukraine	25 °C	-6.4 °C	663 mm	47
Galaţi · Romania	29 °C	-4.0 °C	501 mm	95
Braşov · Romania	23 °C	-7.4 °C	768 mm	29

Where Iaşi ranks

Ranking	Position	Value
Places with the best weather in Europe in September	23rd of 50	94/100
The driest places in Europe in January	48th of 50	29 mm

Planning a trip? See the best time to visit Iaşi.

QuestionsCommon questions about Iaşi’s climate

When is the best time to visit Iaşi?

That depends on what you want, so the honest answer is a comparison rather than a single month. June, July, August sit closest to 20 °C on average, July is the warmest month and February the driest. The month-by-month table above has the full picture.

How hot does Iaşi get?

In July, the warmest month, daily highs average 27 °C. About 20 days a year pass 30 °C. The highest value in the 1991–2020 record is 40 °C.

How cold does it get in winter?

Nights average -5.5 °C in January, the coldest month. A normal year has 101 nights below freezing.

Which month is wettest in Iaşi?

June, averaging 75 mm over 10 days with rain. The driest month is February with 29 mm. The year as a whole averages 568 mm.

Are these figures a forecast?

No. They are 1991–2020 climate normals: the average of thirty years, which describes what a month is usually like in Iaşi rather than what any particular week will bring. Individual years can differ substantially from the normal.

Data sources and method

ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
Open-Meteo — Open-Meteo.com. CC BY 4.0
NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
GeoNames — GeoNames.org. CC BY 4.0

Normal period: 1991–2020
Data point: 47.167°, 27.600° (the coordinates the reanalysis values are taken for)
Dataset version: era5-1991-2020-scores1.1
Last processed: 1 August 2026

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: monthly rankings, daylight hours, beach and comfort scores. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.