Bologna climate

Name: Bologna
Address: IT

Bologna is warmest in July, with average highs of 31 °C, and coldest in January, when nights average 0.5 °C. November is the wettest month (93 mm) and July the driest (45 mm). Figures are 1991–2020 climate normals.

Across a full year Bologna averages 794 mm of rain, 106 days above 25 °C and 45 days below freezing.

Italy · 54 m elevation · population 394,843 · 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 31 °C
Coldest month January 0.5 °C
Driest month July 45 mm
Wettest month November 93 mm
Least cloud July 31 % cloud
Hottest on record August 41 °C
Coldest on record February -18 °C

What to expectBologna through the year

Bologna has a clear annual cycle: average daily highs run from 8.1 °C in January to 31 °C in July, a swing of 21 °C in mean temperature across the year.

Counted across a normal year, 106 days a year reach 25 °C, 49 of them reach 30 °C, 45 nights drop below freezing. The warmest reading in the 1991–2020 record is 41 °C, in August.

Rain is strongly seasonal. November averages 93 mm against 45 mm in July — 2.1 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	8.1 °C	46 mm	57 %
February	10.0 °C	67 mm	51 %
March	14.4 °C	63 mm	50 %
April	18.1 °C	77 mm	52 %
May	22.9 °C	78 mm	51 %
June	27.8 °C	60 mm	42 %
July	30.8 °C	45 mm	31 %
August	30.5 °C	52 mm	34 %
September	24.9 °C	67 mm	42 %
October	19.2 °C	76 mm	56 %
November	13.2 °C	93 mm	62 %
December	8.6 °C	70 mm	57 %

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	8.1 °C	0.5 °C	3.9 °C	20.6 °C	-15.2 °C	0	0	15
February	10.0 °C	0.6 °C	5.0 °C	20.1 °C	-18.0 °C	0	0	12
March	14.4 °C	4.1 °C	9.2 °C	25.4 °C	-7.9 °C	0	0	4
April	18.1 °C	7.7 °C	13.0 °C	27.5 °C	-4.9 °C	1	0	0
May	22.9 °C	12.2 °C	17.7 °C	34.8 °C	4.8 °C	9	1	0
June	27.8 °C	16.6 °C	22.4 °C	38.1 °C	7.9 °C	22	9	0
July	30.8 °C	19.3 °C	25.3 °C	38.9 °C	11.8 °C	29	19	0
August	30.5 °C	19.5 °C	25.0 °C	40.5 °C	10.7 °C	29	17	0
September	24.9 °C	15.0 °C	19.8 °C	35.3 °C	5.9 °C	14	3	0
October	19.2 °C	10.8 °C	14.7 °C	29.0 °C	-0.1 °C	2	0	0
November	13.2 °C	5.9 °C	9.3 °C	21.9 °C	-6.4 °C	0	0	2
December	8.6 °C	1.3 °C	4.6 °C	17.4 °C	-16.7 °C	0	0	12

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	46 mm	7	9.2 h/day	57 %	83 %	10 km/h
February	67 mm	7	10 h/day	51 %	78 %	12 km/h
March	63 mm	8	12 h/day	50 %	72 %	14 km/h
April	77 mm	10	13 h/day	52 %	70 %	14 km/h
May	78 mm	10	15 h/day	51 %	67 %	13 km/h
June	60 mm	7	16 h/day	42 %	62 %	12 km/h
July	45 mm	6	15 h/day	31 %	56 %	12 km/h
August	52 mm	7	14 h/day	34 %	60 %	11 km/h
September	67 mm	8	13 h/day	42 %	68 %	12 km/h
October	76 mm	9	11 h/day	56 %	78 %	11 km/h
November	93 mm	10	9.6 h/day	62 %	83 %	11 km/h
December	70 mm	9	8.9 h/day	57 %	84 %	11 km/h

How Bologna 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
Bologna	31 °C	0.5 °C	794 mm	106
Modena · Italy	30 °C	-0.02 °C	732 mm	101
Reggio nell'Emilia · Italy	30 °C	-0.08 °C	821 mm	96
Prato · Italy	29 °C	1.6 °C	1,018 mm	92
Florence · Italy	30 °C	1.6 °C	905 mm	96
Parma · Italy	30 °C	-0.3 °C	851 mm	101
San Marino · San Marino	26 °C	-1.4 °C	836 mm	51

Where Bologna ranks

Ranking	Position	Value
The warmest places in Europe in May	20thof 50	23 °C
The warmest places in Europe in July	22ndof 50	31 °C
The warmest places in Europe in June	23rdof 50	28 °C
The warmest places in Europe in August	28thof 50	30 °C
The warmest places in Europe in April	29thof 50	18 °C
The warmest places in Europe in September	39thof 50	25 °C

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

QuestionsCommon questions about Bologna’s climate

When is the best time to visit Bologna?

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

How hot does Bologna get?

In July, the warmest month, daily highs average 31 °C. About 49 days a year pass 30 °C. The highest value in the 1991–2020 record is 41 °C.

How cold does it get in winter?

Nights average 0.5 °C in January, the coldest month. A normal year has 45 nights below freezing.

Which month is wettest in Bologna?

November, averaging 93 mm over 10 days with rain. The driest month is July with 45 mm. The year as a whole averages 794 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 Bologna 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
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.