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City in Republika Srpska, Bosnia and Herzegovina

Banja Luka weather by month and the best time to visit

Updated October 2026Sources
May–Jun, SepBest time to visit

When to go to Banja Luka

May–June and September are warm and green. July–August is hot; winters are cold, grey and foggy but cheap and quiet.

Banja Luka weather by month

Average daily high, rainfall and conditions.

PleasantHotRainyCool or coldBest months
-5°5°15°25°35°JFMAMJJASOND
Average highAverage lowRainfall

Monthly averages

MonthHighLowRainHumidityConditions
January4°C40°F-3°C26°F60 mm91%Cold
February6°C44°F-2°C28°F59 mm88%Cold
March12°C53°F1°C34°F62 mm81%Cool
April18°C64°F6°C43°F66 mm76%Cool
May22°C72°F11°C51°F91 mm74%Pleasant
June26°C80°F15°C59°F85 mm70%Pleasant
July30°C86°F17°C63°F66 mm61%Pleasant
August30°C86°F17°C62°F67 mm58%Pleasant
September24°C74°F12°C53°F87 mm68%Pleasant
October18°C65°F7°C44°F74 mm77%Pleasant
November12°C53°F2°C36°F72 mm87%Cool
December5°C42°F-2°C29°F68 mm91%Cold

Best months across Bosnia and Herzegovina

PlaceBest monthsWarmest month
SarajevoMay–Jun, Sep–OctAug (28°C)
MostarApr–Jun, Sep–OctAug (34°C)
Banja LukaMay–Jun, SepAug (30°C)

Quick answers

What is the best month to visit Banja Luka?

May–Jun, Sep. May–June and September are warm and green. July–August is hot; winters are cold, grey and foggy but cheap and quiet.

When is the rainy season in Banja Luka?

Rain peaks in May with about 91 mm. No month averages 150 mm or more.

What is the hottest month in Banja Luka?

August, with average highs of 30°C (86°F).

How cold does Banja Luka get?

The coolest nights are in January, averaging -3°C (26°F).

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Sources

Climate averages are modelled from NASA POWER (MERRA-2) for 2001–2020 at about 50 km resolution, so coasts and valleys can differ a little. Temperatures are adjusted by 0.5°C for the city's elevation. Compiled and reviewed by SoloSquare. How we compile and score this. Spotted something out of date? Tell us.