Banja Luka climate

Name: Banja Luka
Address: BA

Banja Luka is warmest in August, with average highs of 27 °C, and coldest in January, when nights average -3.0 °C. May is the wettest month (111 mm) and February the driest (70 mm). Figures are 1991–2020 climate normals.

Across a full year Banja Luka averages 1,006 mm of rain, 76 days above 25 °C and 84 days below freezing.

Bosnia and Herzegovina · population 221,106 · 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 August 27 °C
Coldest month January -3.0 °C
Driest month February 70 mm
Wettest month May 111 mm
Least cloud August 39 % cloud
Hottest on record July 40 °C
Coldest on record January -28 °C

What to expectBanja Luka through the year

Banja Luka has a clear annual cycle: average daily highs run from 5.3 °C in January to 27 °C in August, a swing of 21 °C in mean temperature across the year.

Counted across a normal year, 76 days a year reach 25 °C, 24 of them reach 30 °C, 84 nights drop below freezing. The warmest reading in the 1991–2020 record is 40 °C, in July.

Rain is spread fairly evenly through the year, from 70 mm in February to 111 mm in May. There is no dry season to aim for.

Month by month

Month	Avg high	Rainfall	Cloud
January	5.3 °C	70 mm	67 %
February	7.5 °C	70 mm	64 %
March	12.3 °C	80 mm	60 %
April	17.1 °C	90 mm	58 %
May	21.3 °C	111 mm	57 %
June	25.0 °C	93 mm	50 %
July	27.4 °C	86 mm	40 %
August	27.5 °C	70 mm	39 %
September	22.2 °C	95 mm	52 %
October	17.4 °C	72 mm	56 %
November	11.5 °C	86 mm	65 %
December	6.0 °C	83 mm	68 %

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	5.3 °C	-3.0 °C	0.8 °C	18.7 °C	-27.7 °C	0	0	23
February	7.5 °C	-2.3 °C	2.3 °C	20.0 °C	-22.7 °C	0	0	20
March	12.3 °C	1.2 °C	6.6 °C	25.3 °C	-21.2 °C	0	0	11
April	17.1 °C	5.4 °C	11.4 °C	28.7 °C	-6.6 °C	1	0	2
May	21.3 °C	10.0 °C	15.9 °C	33.3 °C	0.5 °C	7	0	0
June	25.0 °C	14.1 °C	19.9 °C	36.4 °C	4.8 °C	15	5	0
July	27.4 °C	16.1 °C	22.0 °C	40.1 °C	8.7 °C	22	9	0
August	27.5 °C	16.2 °C	22.0 °C	39.1 °C	7.2 °C	21	9	0
September	22.2 °C	11.8 °C	16.9 °C	35.5 °C	1.0 °C	9	1	0
October	17.4 °C	7.5 °C	12.2 °C	28.2 °C	-2.9 °C	2	0	1
November	11.5 °C	3.1 °C	6.9 °C	23.6 °C	-11.2 °C	0	0	7
December	6.0 °C	-1.5 °C	1.9 °C	19.2 °C	-21.6 °C	0	0	20

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	70 mm	10	9.2 h/day	67 %	84 %	10 km/h
February	70 mm	10	10 h/day	64 %	80 %	11 km/h
March	80 mm	11	12 h/day	60 %	75 %	12 km/h
April	90 mm	12	13 h/day	58 %	74 %	11 km/h
May	111 mm	13	15 h/day	57 %	76 %	11 km/h
June	93 mm	12	16 h/day	50 %	76 %	9.8 km/h
July	86 mm	10	15 h/day	40 %	73 %	9.8 km/h
August	70 mm	8	14 h/day	39 %	73 %	9.4 km/h
September	95 mm	11	13 h/day	52 %	78 %	10 km/h
October	72 mm	9	11 h/day	56 %	82 %	10 km/h
November	86 mm	10	9.6 h/day	65 %	86 %	10 km/h
December	83 mm	11	8.8 h/day	68 %	86 %	10 km/h

How Banja Luka 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
Banja Luka	27 °C	-3.0 °C	1,006 mm	76
Zenica · Bosnia and Herzegovina	27 °C	-2.9 °C	1,101 mm	69
Sarajevo · Bosnia and Herzegovina	26 °C	-3.9 °C	1,117 mm	54
Zagreb · Croatia	27 °C	-2.4 °C	882 mm	72

Planning a trip? See the best time to visit Banja Luka.

QuestionsCommon questions about Banja Luka’s climate

When is the best time to visit Banja Luka?

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, August is the warmest month and February the driest. The month-by-month table above has the full picture.

How hot does Banja Luka get?

In August, the warmest month, daily highs average 27 °C. About 24 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 -3.0 °C in January, the coldest month. A normal year has 84 nights below freezing.

Which month is wettest in Banja Luka?

May, averaging 111 mm over 13 days with rain. The driest month is February with 70 mm. The year as a whole averages 1,006 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 Banja Luka 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: 44.779°, 17.206° (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.