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Banja Luka Weather by Month
Average temperatures, rainfall and humidity for Banja Luka, Bosnia and Herzegovina, month by month, built from OpenWeather’s historical records. Use it to see what a typical Banja Luka month looks like before you travel — then check the live Banja Luka forecast for the days ahead.
Warmest month
August
29°C average high
Coolest month
January
-2°C average low
Wettest month
May
89 mm of rain
Driest month
January
27 mm of rain
Average temperature and rainfall in Banja Luka by month
Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.
| Month | Avg high | Avg low | Record low / high | Rainfall | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 6°C | -2°C | -21°C / 23°C | 27 mm | 84% | 7 km/h |
| February | 9°C | 0°C | -17°C / 23°C | 40 mm | 80% | 7 km/h |
| March | 13°C | 2°C | -17°C / 27°C | 52 mm | 72% | 8 km/h |
| April | 18°C | 6°C | -5°C / 30°C | 76 mm | 70% | 7 km/h |
| May | 21°C | 10°C | -2°C / 31°C | 89 mm | 75% | 7 km/h |
| June | 27°C | 15°C | 4°C / 37°C | 42 mm | 72% | 7 km/h |
| July | 29°C | 16°C | 9°C / 39°C | 52 mm | 67% | 6 km/h |
| August | 29°C | 16°C | 7°C / 40°C | 51 mm | 67% | 6 km/h |
| September | 23°C | 11°C | 0°C / 35°C | 61 mm | 75% | 6 km/h |
| October | 18°C | 7°C | -2°C / 29°C | 59 mm | 79% | 6 km/h |
| November | 11°C | 4°C | -10°C / 29°C | 40 mm | 84% | 6 km/h |
| December | 7°C | 0°C | -18°C / 23°C | 30 mm | 84% | 6 km/h |
Best time to visit Banja Luka
The most comfortable time to visit Banja Luka is generally May to June and September, balancing mild daytime temperatures against the driest stretch of the year. The city has strongly marked seasons and rain concentrates around May, totalling about 619 mm a year.
Travellers who prefer heat should aim for August, when highs average 29°C. May is the month to avoid if rain would spoil your plans — it averages 89 mm, roughly 3× the rainfall of the driest month (January).
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Banja Luka forecast for what is happening now.