Bielsko-Biala weather in May

In May, Bielsko-Biala sees average daytime highs of 18°C and overnight lows near 8°C, with 120 mm of precipitation across 16.9 wet days and about 15.1 hours of daylight. It is the 5th-warmest and 3rd-wettest month of the year here.

Highs climb over the month, from about 17°C in the first days to 19°C by the end. The sky is clear or mostly clear about 23% of the time in May, and the air most often feels dry.

Daylight stretches from about 14 h 24 min at the start of May to 15 h 42 min by month's end. Set against the rest of the year, May is Bielsko-Biala's 6th-clearest and 9th-windiest month. For the whole year in context, see Bielsko-Biala's year-round climate.

Daytime high
18°
5th warmest
Overnight low
8th coldest
Precipitation
120 mm
16.9 wet days
Daylight
15 h 12 min
4:05 AM – 7:15 PM
Cloud cover
65%
6th clearest
Wind
10 km/h
9th windiest
Solar energy
4.92 kWh/m²
Travel score
4.8
out of 10

Bielsko-Biala is city in Silesian Voivodeship, Poland.

Air quality
Elevated
PM2.5 21.6 µg/m³ · 2019
Density
1,412/km²
people per km²
Founded
1312

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 17°C in the first days to 19°C by the end.

A typical May day in Bielsko-Biala reaches about 18°C in the afternoon and slips back to 8°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 11°C and 24°C. Set against its neighbours, May runs about 5°C warmer than April and about 3°C cooler than June.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
1166
2176
3176
4176
5177
6177
7177
8177
9177
10177
11177
12177
13177
14177
15177
16178
17178
18188
19188
20188
21188
22188
23188
24188
25189
26189
27199
28199
29199
30199
311910

How May really feels in Bielsko-Biala

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.

Bielsko-Biala weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -5°6613.110.78.40.0
Feb / -4°6312.39.99.70.0
Mar / -1°7213.6711.50.8
Apr13° / 73132.813.53.3
May18° / 12016.90.215.14.8
Jun21° / 11°12316.10165.4
Jul23° / 13°14117.3015.75.7
Aug23° / 13°10613.3014.26.3
Sep18° / 10013012.45.2
Oct13° / 7611.91.410.53.3
Nov / 6711.95.38.80.8
Dec / -3°6412.29.180.0

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 23% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 18% of May, with mostly cloudy or overcast conditions the remaining 58%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14456
24357
34357
44258
54258
64159
74159
84159
94258
104258
114159
124159
134159
144159
154159
164159
174159
184159
194159
204159
214258
224159
234159
244159
254159
264258
274258
284258
294159
304159
314258

Chance of precipitation in May

Any precipitation

Bielsko-Biala gets around 120 mm of rain and snow over 16.9 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 54% and peaks near 56% on the wettest days, and about 0 day brings snow. The odds climb toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
147
248
349
450
551
652
753
853
954
1054
1154
1255
1355
1455
1555
1655
1755
1855
1954
2054
2154
2255
2355
2455
2555
2655
2755
2856
2956
3056
3156

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 92% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
19910
29910
39910
49820
59820
69820
79730
89730
99730
109640
119640
129640
139550
149550
159550
169460
179460
189370
199370
209280
219190
2290100
2388111
2487121
2586131
2685141
2784151
2882171
2981181
3079192
3177212

Wind in May

Winds average 10 km/h in May.

Across May, daily wind ranges from about 9 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
269calm
279calm
289calm
299calm
309calm
319calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 14 h 24 min at the start of May to 15 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 78 minutes over May. Sunrise moves from 4:30 AM to 3:49 AM, and sunset from 6:52 PM to 7:34 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.44:306:52
214.44:286:54
314.54:266:55
414.54:246:57
514.64:236:59
614.74:217:00
714.74:197:02
814.84:187:03
914.84:167:05
1014.94:147:06
1114.94:137:08
1215.04:117:09
1315.04:107:10
1415.14:087:12
1515.14:077:13
1615.24:057:15
1715.24:047:16
1815.24:037:18
1915.34:017:19
2015.34:007:20
2115.43:597:22
2215.43:587:23
2315.53:577:24
2415.53:557:25
2515.53:547:27
2615.63:537:28
2715.63:527:29
2815.63:517:30
2915.73:507:31
3015.73:507:33
3115.73:497:34

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 4.92 kWh/m².

For context, solar energy here swings from a low near 0.77 kWh/m² to a high of 5.2 kWh/m² in June across the year — May's 4.92 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.8Bright
44.9Bright
54.9Bright
64.9Bright
74.9Bright
84.9Bright
94.9Bright
104.9Bright
114.9Bright
124.9Bright
134.9Bright
144.9Bright
154.9Bright
164.9Bright
174.9Bright
184.9Bright
194.9Bright
204.9Bright
215.0Bright
225.0Bright
235.0Bright
245.0Bright
255.0Bright
265.0Bright
275.1Bright
285.1Bright
295.1Bright
305.1Bright
315.2Bright
Planning a trip in May

Is May a good time to visit Bielsko-Biala?

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

4.8
Sightseeing
5th-best month of the year
1.4
Beach & pool
5th-best month of the year

May is a reasonable time to visit Bielsko-Biala for sightseeing.

What to pack for Bielsko-Biala in May

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

In May, Bielsko-Biala sees daytime highs around 18°C and nights near 8°C. Pack rain gear. Worth having: a warm layer and sun protection. About 17 days see rain.

rain geara warm layersun protection

UV index in Bielsko-Biala 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 Bielsko-Biala peaks around June 22 at about 7 (high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 19 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 7 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJun 22UV 7Dec 19UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar4Moderate
Apr5Moderate
May6High
Jun7High
Jul7High
Aug6High
Sep4Moderate
Oct2Moderate
Nov1Low
Dec1Low

Air quality in Bielsko-Biala 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 Bielsko-Biala is worst in June — around 26 µg/m³ PM2.5 (moderate), about 1.7× the cleanest month (December, 15 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Bielsko-Biala's WHO annual average of 21.6 µg/m³.

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateJun 1726 µg/m³Dec 1316 µg/m³
PM2.5 (µg/m³)Level
Jan19Moderate
Feb20Moderate
Mar24Moderate
Apr25Moderate
May25Moderate
Jun26Moderate
Jul25Moderate
Aug25Moderate
Sep21Moderate
Oct18Moderate
Nov17Moderate
Dec15Moderate
Location & terrain

Where is Bielsko-Biala?

Bielsko-Biala sits at 49.8°N, 19.0°E, 330 m above sea level, in Poland. The nearest listed city is Czechowice-Dziedzice, 11 km away.

Topography around Bielsko-Biala

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Bielsko-Biala.

Within 3 km, the terrain around Bielsko-Biala has only modest variations in elevation — a maximum elevation change of 131 m around an average of 344 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,021 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,717 m.

The land around Bielsko-Biala is covered by trees (46%) and artificial surfaces (43%) within 3 km, trees (55%) within 16 km, and trees (59%) within 80 km.

3 km
131 m
16 km
1,021 m
80 km
1,717 m
treesgrasslandcroplandartificial surfaceswater
May weather nearby: Czechowice-Dziedzice 11 km · Kęty 14 km · Żywiec 18 km · Pszczyna 19 km · Ustroń 21 km · Andrychów 21 km · Auschwitz 26 km · Bieruń 30 km

Poland travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / E
230 V · 50 Hz
Prices
≈ 52% of US
price level, 2025
GDP per capita
$28,420
2025
Happiness
6.8 / 10
World Happiness, 2025
Safe drinking water
89%
of population, 2024
Homicide rate
0.8
per 100k, 2023
Road deaths
9.4
per 100k/yr, 2019
Income group
High
World Bank
English
Very high
EF EPI 600
Religion
Roman Catholic 71%refused to answer 21%no religion 7%

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 Bielsko-Biala (49.8225°, 19.0469°, elevation 330 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).