Banja Luka climate
Banja Luka (Bosnia and Herzegovina) has a humid subtropical climate (Köppen Cfa). The average temperature over the year is 12 °C54 °F, and about 857 mm34 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Banja Luka climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin | Frost days |
|---|---|---|---|---|---|
| Jan | 440 | −326 | 033 | 602.4 | 23 |
| Feb | 644 | −228 | 236 | 592.3 | 19 |
| Mar | 1254 | 134 | 744 | 622.4 | 12 |
| Apr | 1864 | 643 | 1253 | 662.6 | 2 |
| May | 2272 | 1151 | 1762 | 913.6 | 0 |
| Jun | 2780 | 1559 | 2169 | 853.4 | 0 |
| Jul | 3086 | 1763 | 2474 | 662.6 | 0 |
| Aug | 3086 | 1762 | 2474 | 672.6 | 0 |
| Sep | 2475 | 1253 | 1864 | 873.4 | 0 |
| Oct | 1864 | 744 | 1254 | 742.9 | 2 |
| Nov | 1253 | 337 | 745 | 722.8 | 8 |
| Dec | 542 | −229 | 235 | 682.7 | 20 |
| Year | 3086 | −326 | 1254 | 85734 | 87 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total. Frost days are for the whole grid cell.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 91% | 78% | 1.4 | 9:09 |
| Feb | 88% | 77% | 2.0 | 10:22 |
| Mar | 81% | 70% | 3.2 | 11:47 |
| Apr | 76% | 67% | 4.3 | 13:25 |
| May | 74% | 67% | 5.3 | 14:48 |
| Jun | 70% | 58% | 6.0 | 15:34 |
| Jul | 61% | 47% | 6.1 | 15:15 |
| Aug | 58% | 45% | 5.4 | 14:03 |
| Sep | 68% | 59% | 3.8 | 12:27 |
| Oct | 77% | 63% | 2.7 | 10:52 |
| Nov | 87% | 73% | 1.6 | 9:29 |
| Dec | 91% | 76% | 1.1 | 8:49 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Banja Luka is like
The warmest month is July, with an average high of 30 °C86 °F and a low of 17 °C63 °F. The coldest is January, when highs average 4 °C40 °F and lows −3 °C26 °F. Seasons are strongly marked: the warmest month is on average 23.1 °C41.6 °F warmer than the coldest.
Annual precipitation is moderate at about 857 mm34 in. Rain is spread fairly evenly through the year. The wettest month is May (91 mm3.6 in), the driest is February (59 mm2.3 in).
Relative humidity ranges from 58% in August to 91% in December. The clearest skies (lowest average cloud amount, 45%) are typical of August. Average wind speed near the ground ranges from 2 km/h (1 mph) in June to 4 km/h (2 mph) in February. Daylight lasts from about 8.8 hours in December to 15.6 hours in June.
A lasting snow cover is typical in December–February, when the average snow depth in the reanalysis exceeds 10 cm (deepest in January, about 15 cm).
Best time to visit Banja Luka
Based on these averages, the most comfortable months for sightseeing and outdoor activities are May–July and September: average highs of 22 °C72 °F to 30 °C86 °F with 66 mm2.6 in to 91 mm3.6 in of precipitation per month.
The most challenging month is January, which is cold, with average highs of 4 °C40 °F.
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
What to pack for Banja Luka
- Winter (December–February) — highs 440 to 6 °C44 °F, lows −326 to −2 °C29 °F, about 63 mm2.5 in of precipitation a month. Pack a warm coat, layers and closed shoes and shoes with good grip, as frost is common.
- Spring (March–May) — highs 1254 to 22 °C72 °F, lows 134 to 11 °C51 °F, about 73 mm2.9 in of precipitation a month. Pack long sleeves, a sweater and a medium jacket and an extra layer for the cooler mornings and evenings.
- Summer (June–August) — highs 2780 to 30 °C86 °F, lows 1559 to 17 °C63 °F, about 73 mm2.9 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and an extra layer for the cooler mornings and evenings.
- Autumn (September–November) — highs 1253 to 24 °C75 °F, lows 337 to 12 °C53 °F, about 78 mm3.1 in of precipitation a month. Pack long sleeves, a sweater and a medium jacket and an extra layer for the cooler mornings and evenings.
How Banja Luka compares
Compared with Sarajevo, about 138 km to the southeast, Banja Luka is on average 0.9 °C1.6 °F warmer and receives a similar amount of precipitation. The difference is largest in July (2 °C3.6 °F warmer).
Of the 5 places in Bosnia and Herzegovina covered by World Climates, Banja Luka is the 4th warmest by annual mean temperature and the 4th wettest by annual precipitation. See all of them on the Bosnia and Herzegovina climate page.
Places in other countries with the most similar temperature and rainfall pattern: Čačak (Serbia, Cfa), Kragujevac (Serbia, Cfa) and Zagreb (Croatia, Dfa).
Nearby places
- Zenica 85 km · 12 °C54 °F · 900 mm35 in
- Tuzla 119 km · 12 °C54 °F · 838 mm33 in
- Sarajevo 138 km · 11 °C52 °F · 900 mm35 in
- Zagreb 150 km · 11 °C53 °F · 906 mm36 in
- Split 154 km · 17 °C62 °F · 921 mm36 in
- Pécs 165 km · 12 °C53 °F · 673 mm27 in
- Mostar 167 km · 15 °C59 °F · 983 mm39 in
- Novi Sad 213 km · 12 °C54 °F · 635 mm25 in
Frequently asked questions
What is the warmest month in Banja Luka?
July is the warmest month in Banja Luka, with an average high of 30 °C (86 °F) and an average low of 17 °C (63 °F).
What is the coldest month in Banja Luka?
January is the coldest month, with an average high of 4 °C (40 °F) and an average low of -3 °C (26 °F).
When does it rain the most in Banja Luka?
May is the wettest month with about 91 mm (3.6 in) of precipitation; February is the driest with about 59 mm (2.3 in).
What is the best time to visit Banja Luka?
Judging by long-term averages, the most comfortable months are May–July and September.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.
The grid cell’s average elevation is 232 m, while Banja Luka lies at about 151 m. Temperatures on this page were therefore adjusted by +0.5 °C0.9 °F using the standard lapse rate of 6.5 °C per 1,000 m.