Ostrava in Summer
In summer (June, July and August), Ostrava sees average daytime highs around 23°C and overnight lows near 13°C, with 299 mm of rain over about 40 wet days across the season. It is the warmest season of the year and the wettest season of the year.
Across summer, daytime highs hold fairly steady around 23°C. The sky is clear or mostly clear about 28% of the time across summer, and the air most often feels dry.
Summer is Ostrava's best season of the year to visit on our travel score. For the whole year in context, see Ostrava's year-round climate.
- Avg daytime high
- 23°C
- warmest season of the year
- Avg overnight low
- 13°C
- Rainfall
- 299 mm
- 40 wet days
- Avg wind
- 9 km/h
- Travel score
- 6.3
- best season of the year
- Months
- Jun · Jul · Aug
Temperature in Ostrava in Summer
Across summer, daytime highs hold fairly steady around 23°C.
A typical summer day in Ostrava reaches about 23°C and drops to 13°C overnight. The warmest of the three months is July, the coolest June.
How summer really feels in Ostrava
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.
Ostrava 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 | 1° / -4° | 47 | 11.1 | 8.4 | 8.4 | 0.0 |
| Feb | 3° / -3° | 45 | 10.8 | 7.8 | 9.7 | 0.0 |
| Mar | 8° / -0° | 55 | 12.1 | 4.7 | 11.5 | 1.1 |
| Apr | 14° / 4° | 57 | 10.8 | 1.7 | 13.5 | 3.8 |
| May | 18° / 8° | 90 | 14 | 0.1 | 15.1 | 5.4 |
| Jun | 21° / 12° | 100 | 13.6 | 0 | 16 | 5.9 |
| Jul | 24° / 14° | 115 | 14.3 | 0 | 15.7 | 6.3 |
| Aug | 24° / 13° | 85 | 11.7 | 0 | 14.2 | 6.7 |
| Sep | 19° / 10° | 82 | 11 | 0 | 12.4 | 5.7 |
| Oct | 13° / 6° | 59 | 10.3 | 0.4 | 10.5 | 3.5 |
| Nov | 7° / 2° | 53 | 10.5 | 3.5 | 8.8 | 1.0 |
| Dec | 2° / -2° | 49 | 11.1 | 7 | 8 | 0.0 |
Cloud cover in Summer
The sky is clear or mostly clear about 28% of the time across summer.
Chance of precipitation in Summer
Ostrava gets around 299 mm of rain over 40 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 9 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 15 h 48 min in early June to 13 h 24 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 5.0 kWh/m².
Is summer a good time to visit Ostrava?
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 Ostrava for sightseeing.
What to pack for Ostrava in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Ostrava sees daytime highs around 23°C and nights near 13°C. Pack rain gear. Worth having: light clothes and sun protection. About 40 days see rain.
UV index in Ostrava in Summer
Clear-sky midday UV across summer averages around 7 — 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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 1 | 2 | 4 | 5 | 6 | 7 | 7 | 6 | 4 | 2 | 1 | 1 |
| Level | Low | Low | Moderate | Moderate | High | Very high | High | High | Moderate | Moderate | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 1 | Low |
| Feb | 2 | Low |
| Mar | 4 | Moderate |
| Apr | 5 | Moderate |
| May | 6 | High |
| Jun | 7 | Very high |
| Jul | 7 | High |
| Aug | 6 | High |
| Sep | 4 | Moderate |
| Oct | 2 | Moderate |
| Nov | 1 | Low |
| Dec | 1 | Low |
Air quality in Ostrava 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 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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 18 | 19 | 23 | 23 | 23 | 24 | 23 | 23 | 20 | 17 | 16 | 15 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 18 | Moderate |
| Feb | 19 | Moderate |
| Mar | 23 | Moderate |
| Apr | 23 | Moderate |
| May | 23 | Moderate |
| Jun | 24 | Moderate |
| Jul | 23 | Moderate |
| Aug | 23 | Moderate |
| Sep | 20 | Moderate |
| Oct | 17 | Moderate |
| Nov | 16 | Moderate |
| Dec | 15 | Moderate |
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.
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
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.