Banja Luka weather in May

In May, Banja Luka sees average daytime highs of 21°C and overnight lows near 10°C, with 112 mm of rain across 13.5 wet days and about 14.6 hours of daylight. It is the 5th-warmest and 1st-wettest month of the year here.

Highs climb over the month, from about 20°C in the first days to 22°C by the end. The sky is clear or mostly clear about 30% of the time in May, and the air most often feels dry.

Daylight stretches from about 14 hours at the start of May to 15 h 06 min by month's end. Set against the rest of the year, May is Banja Luka's 6th-clearest and 6th-windiest month. For the whole year in context, see Banja Luka's year-round climate.

Daytime high
21°
5th warmest
Overnight low
10°
8th coldest
Rainfall
112 mm
13.5 wet days
Daylight
14 h 36 min
4:29 AM – 7:06 PM
Cloud cover
59%
6th clearest
Wind
7 km/h
6th windiest
Solar energy
5.41 kWh/m²
Travel score
6.0
out of 10

Banja Luka is city in Bosnia and Herzegovina.

Density
178/km²
people per km²
Founded
1494

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 20°C in the first days to 22°C by the end.

A typical May day in Banja Luka reaches about 21°C in the afternoon and slips back to 10°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 15°C and 27°C. Set against its neighbours, May runs about 4°C warmer than April and about 4°C cooler than June.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
1208
2209
3209
4209
5209
6209
7209
8219
9219
10219
112110
122110
132110
142110
152110
162110
172110
182110
192110
202110
212211
222211
232211
242211
252211
262211
272211
282211
292212
302312
312312

How May really feels in Banja Luka

Once humidity and wind are folded in, May averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

May 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 May compares with the rest of the year at a glance. May is the 5th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -3°7010.4790.0
Feb / -2°7010.36.510.10.8
Mar12° / 7911.54.311.63.1
Apr17° / 9212.71.413.24.9
May21° / 10°11213.5014.66.0
Jun25° / 14°9711.9015.36.6
Jul27° / 15°8710.50156.7
Aug27° / 15°728.8013.97.0
Sep22° / 11°9511012.36.6
Oct17° / 729.20.610.75.6
Nov11° / 8510.239.42.7
Dec / -1°8211.56.18.70.2

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 30% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 19% of May, with mostly cloudy or overcast conditions the remaining 51%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14654
24753
34654
44753
54753
64753
74852
84852
94753
104852
114852
124951
134951
145050
155050
165050
175050
185050
195050
205050
215149
225149
235050
245149
255149
265149
275248
285248
295248
305248
315248

Chance of precipitation in May

Any precipitation

Banja Luka gets around 112 mm of rain over 13.5 wet days in May, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 44% and peaks near 46% on the wettest days.

0%20%40%60%151015202531
Rain chance (%)
143
243
343
443
543
643
743
842
942
1042
1142
1242
1342
1442
1542
1643
1743
1844
1944
2044
2144
2245
2345
2445
2545
2646
2746
2846
2946
3046
3146

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

Most of May feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, May lands in the dry band about 76% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
19460
29370
39370
49280
59190
690100
789110
888120
987130
1086140
1184151
1283161
1382171
1481181
1579192
1678202
1776213
1876213
1974224
2072235
2170246
2269247
2367258
2466259
25642610
26622711
27602812
28582913
29563014
30533116
31513217

Wind in May

Winds average 7 km/h in May.

Across May, daily wind ranges from about 6 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 14 hours at the start of May to 15 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 66 minutes over May. Sunrise moves from 4:49 AM to 4:16 AM, and sunset from 6:48 PM to 7:22 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.04:496:48
214.04:476:49
314.14:466:50
414.14:446:52
514.24:436:53
614.24:426:54
714.34:406:55
814.34:396:57
914.34:376:58
1014.44:366:59
1114.44:357:00
1214.54:347:01
1314.54:327:03
1414.54:317:04
1514.64:307:05
1614.64:297:06
1714.74:287:07
1814.74:277:08
1914.74:267:09
2014.84:257:11
2114.84:247:12
2214.84:237:13
2314.94:227:14
2414.94:217:15
2514.94:207:16
2615.04:197:17
2715.04:187:18
2815.04:187:19
2915.04:177:20
3015.14:167:21
3115.14:167:22

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.41 kWh/m².

For context, solar energy here swings from a low near 1.22 kWh/m² to a high of 5.91 kWh/m² in July across the year — May's 5.41 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.2Bright
25.2Bright
35.3Bright
45.3Bright
55.3Bright
65.3Bright
75.3Bright
85.3Bright
95.3Bright
105.3Bright
115.3Bright
125.3Bright
135.3Bright
145.3Bright
155.3Bright
165.4Bright
175.4Bright
185.4Bright
195.4Bright
205.4Bright
215.4Bright
225.5Bright
235.5Bright
245.5Bright
255.5Bright
265.5Bright
275.6Bright
285.6Bright
295.6Bright
305.6Bright
315.6Bright
Planning a trip in May

Is May a good time to visit Banja Luka?

Our two travel scores rate May for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

6.0
Sightseeing
5th-best month of the year
3.8
Beach & pool
5th-best month of the year

May is a reasonable time to visit Banja Luka for sightseeing.

What to pack for Banja Luka in May

From May's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In May, Banja Luka sees daytime highs around 21°C and nights near 10°C. Worth packing: rain gear and sun protection. About 14 days see rain.

rain gearsun protection

UV index in Banja Luka in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 6 — 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJul 11UV 8Dec 20UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar5Moderate
Apr7High
May6High
Jun8Very high
Jul8Very high
Aug8Very high
Sep5High
Oct3Moderate
Nov2Low
Dec1Low

Air quality in Banja Luka in May

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where May 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).

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1415 µg/m³Dec 149 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb11Good
Mar14Moderate
Apr15Moderate
May14Moderate
Jun14Moderate
Jul12Good
Aug13Moderate
Sep10Good
Oct10Good
Nov10Good
Dec9Good
Location & terrain

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.

PrijedorJajceTeslicDobojTravnikPožegaSlavonski BrodBugojno

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.

3 km
286 m
16 km
831 m
80 km
1,855 m
treesgrasslandcroplandartificial surfaceswater
May weather nearby: Prijedor 45 km · Jajce 49 km · Teslic 55 km · Doboj 70 km · Travnik 71 km · Požega 73 km · Slavonski Brod 77 km · Bugojno 83 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
Muslim 51%Orthodox 31%Roman Catholic 15%other 1%

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. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).