Bielsko-Biala weather in April

In April, Bielsko-Biala sees average daytime highs of 13°C and overnight lows near 3°C, with 73 mm of precipitation across 13 wet days and about 13.5 hours of daylight. It is the 6th-warmest and 7th-wettest month of the year here.

Highs climb over the month, from about 10°C in the first days to 16°C by the end. The sky is clear or mostly clear about 24% of the time in April, and the air most often feels dry.

Daylight stretches from about 12 h 36 min at the start of April to 14 h 18 min by month's end. Set against the rest of the year, April is Bielsko-Biala's 4th-clearest and 7th-windiest month. For the whole year in context, see Bielsko-Biala's year-round climate.

Daytime high
13°
6th warmest
Overnight low
6th coldest
Precipitation
73 mm
13 wet days
Daylight
13 h 30 min
4:59 AM – 6:29 PM
Cloud cover
63%
4th clearest
Wind
10 km/h
7th windiest
Solar energy
4.34 kWh/m²
Travel score
3.3
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 April

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 10°C in the first days to 16°C by the end.

A typical April day in Bielsko-Biala reaches about 13°C in the afternoon and slips back to 3°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 6°C and 20°C. Set against its neighbours, April runs about 6°C warmer than March and about 5°C cooler than May.

10°20°151015202530
Avg high (°C)Avg low (°C)
1101
2101
3101
4111
5112
6112
7112
8112
9112
10122
11122
12122
13123
14123
15133
16133
17133
18133
19144
20144
21144
22154
23155
24155
25155
26165
27165
28166
29166
30166

How April really feels in Bielsko-Biala

Once humidity and wind are folded in, April averages 0 days that feel above 32°C and 14 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
14
wind chill below the day's low

The story in April is cold — wind chill drags the overnight "feels like" below the raw low.

Bielsko-Biala weather by month

How April compares with the rest of the year at a glance. April is the 6th-warmest and 7th-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 April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 24% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 16% of April, with mostly cloudy or overcast conditions the remaining 61%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13862
23862
33862
43763
53664
63664
73565
83565
93466
103466
113466
123466
133565
143664
153763
163862
173961
184159
194159
204258
214357
224357
234456
244456
254456
264555
274456
284555
294456
304357

Chance of precipitation in April

Any precipitationSnow

Bielsko-Biala gets around 73 mm of rain and snow over 13 wet days in April. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 44% and peaks near 47% on the wettest days, and about 3 days bring snow.

0%20%40%60%151015202530
Rain chance (%)Snow chance (%)
14218
24318
34317
44317
54416
64416
74515
84515
94614
104614
114713
124712
134612
144611
154610
16459
17459
18448
19447
20436
21436
22435
23435
24434
25434
26433
27443
28452
29462
30462

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, April lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)
11000
21000
31000
41000
51000
61000
71000
81000
91000
101000
111000
121000
131000
141000
151000
161000
171000
181000
191000
201000
211000
221000
231000
241000
251000
261000
271000
281000
291000
30991

Wind in April

Winds average 10 km/h in April.

Across April, daily wind ranges from about 10 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 36 min at the start of April to 14 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 102 minutes over April. Sunrise moves from 5:32 AM to 4:31 AM, and sunset from 6:05 PM to 6:51 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.65:326:05
212.65:306:07
312.75:276:08
412.75:256:10
512.85:236:11
612.95:216:13
712.95:196:15
813.05:166:16
913.15:146:18
1013.15:126:19
1113.25:106:21
1213.25:086:23
1313.35:066:24
1413.45:036:26
1513.45:016:27
1613.54:596:29
1713.64:576:30
1813.64:556:32
1913.74:536:34
2013.74:516:35
2113.84:496:37
2213.94:476:38
2313.94:456:40
2414.04:436:41
2514.04:416:43
2614.14:396:45
2714.24:376:46
2814.24:356:48
2914.34:336:49
3014.34:316:51

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 4.34 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 — April's 4.34 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
13.7Moderate
23.8Moderate
33.8Moderate
43.8Moderate
53.9Moderate
63.9Moderate
73.9Moderate
84.0Moderate
94.0Bright
104.0Bright
114.1Bright
124.1Bright
134.2Bright
144.2Bright
154.3Bright
164.3Bright
174.4Bright
184.4Bright
194.5Bright
204.5Bright
214.6Bright
224.6Bright
234.7Bright
244.7Bright
254.7Bright
264.7Bright
274.8Bright
284.8Bright
294.8Bright
304.8Bright
Planning a trip in April

Is April a good time to visit Bielsko-Biala?

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

3.3
Sightseeing
6th-best month of the year
0.1
Beach & pool
6th-best month of the year

April is a weaker month for outdoor sightseeing in Bielsko-Biala.

What to pack for Bielsko-Biala in April

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

In April, Bielsko-Biala sees daytime highs around 13°C and nights near 3°C. Worth packing: a warm layer and rain gear. About 13 days see rain.

a warm layerrain gear

UV index in Bielsko-Biala in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April peaks around 5 — 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 April

GoodModeratePoorUnhealthyVery unhealthy

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