Banja Luka in Summer
In summer (June, July and August), Banja Luka sees average daytime highs around 26°C and overnight lows near 15°C, with 256 mm of rain over about 31 wet days across the season. It is the warmest season of the year and the 2nd-wettest season.
Over the season highs climb from about 23°C in early June to 25°C by late August. The sky is clear or mostly clear about 48% of the time across summer, and the air most often feels humid.
Summer is Banja Luka's best season of the year to visit on our travel score. For the whole year in context, see Banja Luka's year-round climate.
- Avg daytime high
- 26°C
- warmest season of the year
- Avg overnight low
- 15°C
- Rainfall
- 256 mm
- 31 wet days
- Avg wind
- 6 km/h
- Travel score
- 6.8
- best season of the year
- Months
- Jun · Jul · Aug
Temperature in Banja Luka in Summer
Over the season highs climb from about 23°C in early June to 25°C by late August.
A typical summer day in Banja Luka reaches about 26°C and drops to 15°C overnight. The warmest of the three months is July, the coolest June.
How summer really feels in Banja Luka
Once humidity and wind are folded in, summer brings about 0 days that feel above 32°C and 0 that feel at or below 0°C.
summer sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Banja Luka weather by month
How the three summer months (June, July and August) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 5° / -3° | 70 | 10.4 | 7 | 9 | 0.0 |
| Feb | 7° / -2° | 70 | 10.3 | 6.5 | 10.1 | 0.8 |
| Mar | 12° / 2° | 79 | 11.5 | 4.3 | 11.6 | 3.1 |
| Apr | 17° / 6° | 92 | 12.7 | 1.4 | 13.2 | 4.9 |
| May | 21° / 10° | 112 | 13.5 | 0 | 14.6 | 6.0 |
| Jun | 25° / 14° | 97 | 11.9 | 0 | 15.3 | 6.6 |
| Jul | 27° / 15° | 87 | 10.5 | 0 | 15 | 6.7 |
| Aug | 27° / 15° | 72 | 8.8 | 0 | 13.9 | 7.0 |
| Sep | 22° / 11° | 95 | 11 | 0 | 12.3 | 6.6 |
| Oct | 17° / 7° | 72 | 9.2 | 0.6 | 10.7 | 5.6 |
| Nov | 11° / 3° | 85 | 10.2 | 3 | 9.4 | 2.7 |
| Dec | 6° / -1° | 82 | 11.5 | 6.1 | 8.7 | 0.2 |
Cloud cover in Summer
The sky is clear or mostly clear about 48% of the time across summer.
Chance of precipitation in Summer
Banja Luka gets around 256 mm of rain over 31 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 6 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 15 h 06 min in early June to 13 h 06 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 5.7 kWh/m².
Is summer a good time to visit Banja Luka?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is a reasonable time to visit Banja Luka for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Banja Luka in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Banja Luka sees daytime highs around 26°C and nights near 15°C. Pack light clothes. Worth having: rain gear and sun protection. About 31 days see rain.
UV index in Banja Luka in Summer
Clear-sky midday UV across summer averages around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Banja Luka peaks around July 11 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 1 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 1 | 2 | 5 | 7 | 6 | 8 | 8 | 8 | 5 | 3 | 2 | 1 |
| Level | Low | Moderate | Moderate | High | High | Very high | Very high | Very high | High | Moderate | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 1 | Low |
| Feb | 2 | Moderate |
| Mar | 5 | Moderate |
| Apr | 7 | High |
| May | 6 | High |
| Jun | 8 | Very high |
| Jul | 8 | Very high |
| Aug | 8 | Very high |
| Sep | 5 | High |
| Oct | 3 | Moderate |
| Nov | 2 | Low |
| Dec | 1 | Low |
Air quality in Banja Luka in Summer
Average fine-particle pollution (PM2.5) through the year — so you can see where summer falls, not just the annual average.
Air quality in Banja Luka is worst in April — around 15 µg/m³ PM2.5 (moderate), about 1.7× the cleanest month (December, 9 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 11 | 11 | 14 | 15 | 14 | 14 | 12 | 13 | 10 | 10 | 10 | 9 |
| Level | Good | Good | Moderate | Moderate | Moderate | Moderate | Good | Moderate | Good | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 11 | Good |
| Feb | 11 | Good |
| Mar | 14 | Moderate |
| Apr | 15 | Moderate |
| May | 14 | Moderate |
| Jun | 14 | Moderate |
| Jul | 12 | Good |
| Aug | 13 | Moderate |
| Sep | 10 | Good |
| Oct | 10 | Good |
| Nov | 10 | Good |
| Dec | 9 | Good |
Where is Banja Luka?
Banja Luka sits at 44.8°N, 17.2°E, 151 m above sea level, in Bosnia and Herzegovina. The nearest listed city is Prijedor, 45 km away.
Topography around Banja Luka
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Banja Luka.
Within 3 km, the terrain around Banja Luka has significant variations in elevation — a maximum elevation change of 286 m around an average of 181 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 831 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,855 m.
The land around Banja Luka is covered by artificial surfaces (46%) and trees (33%) within 3 km, trees (65%) and grassland (26%) within 16 km, and trees (72%) within 80 km.
Bosnia and Herzegovina travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type C / F
- 230 V · 50 Hz
- Prices
- ≈ 40% of US
- price level, 2025
- GDP per capita
- $10,382
- 2025
- Happiness
- 6.4 / 10
- World Happiness, 2025
- Safe drinking water
- 86%
- of population, 2024
- Homicide rate
- 1.2
- per 100k, 2023
- Road deaths
- 13.5
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- High
- EF EPI 591
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Banja Luka (44.7788°, 17.2063°, elevation 151 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.