Ostrava weather in April

In April, Ostrava sees average daytime highs of 14°C and overnight lows near 4°C, with 57 mm of precipitation across 10.8 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 11°C in the first days to 17°C by the end. The sky is clear or mostly clear about 25% 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 Ostrava's 4th-clearest and 7th-windiest month. For the whole year in context, see Ostrava's year-round climate.

Daytime high
14°
6th warmest
Overnight low
6th coldest
Precipitation
57 mm
10.8 wet days
Daylight
13 h 30 min
5:02 AM – 6:32 PM
Cloud cover
62%
4th clearest
Wind
11 km/h
7th windiest
Solar energy
4.4 kWh/m²
Travel score
3.8
out of 10

Ostrava is city in Czechia.

Air quality
Elevated
PM2.5 20.3 µg/m³ · 2019
Density
1,306/km²
people per km²
Founded
1267

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 11°C in the first days to 17°C by the end.

A typical April day in Ostrava reaches about 14°C in the afternoon and slips back to 4°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 7°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)
1112
2112
3112
4112
5112
6122
7123
8123
9123
10123
11123
12133
13133
14134
15134
16144
17144
18144
19144
20155
21155
22155
23155
24166
25166
26166
27166
28176
29177
30177

How April really feels in Ostrava

Once humidity and wind are folded in, April averages 0 days that feel above 32°C and 11 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
11
wind chill below the day's low

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

Ostrava 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 / -4°4711.18.48.40.0
Feb / -3°4510.87.89.70.0
Mar / -0°5512.14.711.51.1
Apr14° / 5710.81.713.53.8
May18° / 90140.115.15.4
Jun21° / 12°10013.60165.9
Jul24° / 14°11514.3015.76.3
Aug24° / 13°8511.7014.26.7
Sep19° / 10°8211012.45.7
Oct13° / 5910.30.410.53.5
Nov / 5310.53.58.81.0
Dec / -2°4911.1780.0

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 25% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 17% of April, with mostly cloudy or overcast conditions the remaining 58%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14060
23961
33961
43961
53961
63862
73763
83763
93763
103664
113664
123763
133862
143961
154060
164060
174159
184357
194456
204555
214555
224654
234654
244753
254753
264654
274555
284654
294456
304456

Chance of precipitation in April

Any precipitationSnow

Ostrava gets around 57 mm of rain and snow over 10.8 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 37% and peaks near 40% on the wettest days, and about 2 days bring snow.

0%10%20%30%40%50%151015202530
Rain chance (%)Snow chance (%)
13611
23611
33610
43610
53610
63610
7379
8379
9379
10389
11388
12388
13388
14377
15376
16376
17375
18375
19374
20374
21373
22363
23372
24372
25372
26371
27381
28381
29391
30401

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
28991
29991
30991

Wind in April

Winds average 11 km/h in April.

Across April, daily wind ranges from about 10 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
112calm
212calm
312calm
412calm
512calm
612calm
712calm
812calm
912calm
1012calm
1112calm
1212calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
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 5:35 AM to 4:35 AM, and sunset from 6:08 PM to 6:54 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.65:356:08
212.65:336:10
312.75:306:11
412.75:286:13
512.85:266:15
612.95:246:16
712.95:226:18
813.05:196:19
913.15:176:21
1013.15:156:22
1113.25:136:24
1213.25:116:26
1313.35:096:27
1413.45:066:29
1513.45:046:30
1613.55:026:32
1713.65:006:34
1813.64:586:35
1913.74:566:37
2013.74:546:38
2113.84:526:40
2213.94:506:41
2313.94:486:43
2414.04:466:45
2514.04:446:46
2614.14:426:48
2714.24:406:49
2814.24:386:51
2914.34:366:52
3014.34:356:54

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 4.4 kWh/m².

For context, solar energy here swings from a low near 0.75 kWh/m² to a high of 5.32 kWh/m² in June across the year — April's 4.4 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
13.7Moderate
23.8Moderate
33.8Moderate
43.9Moderate
53.9Moderate
63.9Moderate
74.0Moderate
84.0Bright
94.0Bright
104.1Bright
114.1Bright
124.2Bright
134.2Bright
144.3Bright
154.3Bright
164.4Bright
174.5Bright
184.5Bright
194.5Bright
204.6Bright
214.6Bright
224.7Bright
234.7Bright
244.8Bright
254.8Bright
264.8Bright
274.8Bright
284.8Bright
294.8Bright
304.9Bright
Planning a trip in April

Is April a good time to visit Ostrava?

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

3.8
Sightseeing
6th-best month of the year
0.2
Beach & pool
6th-best month of the year

April is a weaker month for outdoor sightseeing in Ostrava.

What to pack for Ostrava in April

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

In April, Ostrava sees daytime highs around 14°C and nights near 4°C. Worth packing: a warm layer and rain gear. About 11 days see rain.

a warm layerrain gear

UV index in Ostrava 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 Ostrava peaks around June 20 at about 7 (very 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighHighModerateLowJun 20UV 7Dec 19UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar4Moderate
Apr5Moderate
May6High
Jun7Very high
Jul7High
Aug6High
Sep4Moderate
Oct2Moderate
Nov1Low
Dec1Low

Air quality in Ostrava 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 Ostrava is worst in June — around 24 µg/m³ PM2.5 (moderate), about 1.7× the cleanest month (December, 15 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Ostrava's WHO annual average of 20.3 µg/m³.

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateJun 1624 µg/m³Dec 1415 µg/m³
PM2.5 (µg/m³)Level
Jan18Moderate
Feb19Moderate
Mar23Moderate
Apr23Moderate
May23Moderate
Jun24Moderate
Jul23Moderate
Aug23Moderate
Sep20Moderate
Oct17Moderate
Nov16Moderate
Dec15Moderate
Location & terrain

Where is Ostrava?

Ostrava sits at 49.8°N, 18.3°E, 211 m above sea level, in Czechia. The nearest listed city is Bohumín, 9.0 km away.

Topography around Ostrava

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

Within 3 km, the terrain around Ostrava has only modest variations in elevation — a maximum elevation change of 118 m around an average of 226 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 216 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,334 m.

The land around Ostrava is covered by artificial surfaces (49%) and trees (43%) within 3 km, trees (43%) and cropland (28%) within 16 km, and trees (50%) and cropland (29%) within 80 km.

3 km
118 m
16 km
216 m
80 km
1,334 m
treesgrasslandcroplandartificial surfaceswater
April weather nearby: Bohumín 9.0 km · Starý Bohumín 10 km · Orlová 11 km · Havířov 13 km · Frýdek-Místek 18 km · Karviná 19 km · Wodzisław Śląski 23 km · Jastrzębie Zdrój 25 km

Czechia travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / E
230 V · 50 Hz
Prices
≈ 59% of US
price level, 2025
GDP per capita
$35,917
2025
Happiness
6.8 / 10
World Happiness, 2025
Safe drinking water
98%
of population, 2024
Homicide rate
0.8
per 100k, 2023
Road deaths
5.9
per 100k/yr, 2019
Income group
High
World Bank
English
High
EF EPI 582
Religion
none 48%believers unaffiliated with a religious society 9%Roman Catholic 7%other believers belonging to a church or religious society 6%

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 Ostrava (49.8347°, 18.282°, elevation 211 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).