Ostrava Weather in September

Ostrava in September sees pleasant daytime temperatures of 20°C (68°F) and nighttime lows of 10°C (50°F). Rainfall is fairly high this month at around 89 mm (3.5 in), so pack a rain jacket to stay dry.

Rainfall in Ostrava in September

You can expect rain on roughly 12 days based on historical data, averaging 89 mm (3.5 in) for the month. When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.

Temperature in Ostrava in September

The perfect temperature in Ostrava in September makes it a solid month to visit, with 20°C (68°F) during the day and 10°C (50°F) at night. A light jacket or extra layer can be useful, especially outside the warmest hours of the day. Nights drop to 10°C (50°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet.

Sunshine in Ostrava in September

The city usually sees around 150 hours of sunlight, indicating a moderately sunny period.

Wind Speed in Ostrava in September

Wind speeds average 3 m/s (6 knots) during September. At this speed, light breezes keep leaves and small twigs in gentle motion while the wind also provides natural cooling. Since this is an average, some days are more tranquil while others have more persistent light winds that are more noticeable.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. May, August and September typically offer the best weather for Ostrava.

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Czech Republic, check out our Ostrava's climate page.

Ostrava Temperature in September

Min Temperature 10°C (50°F)  

Max Temperature 20°C (68°F)  

Chance of Rain 41%  

Precipitation 89 mm (3.5 in)  

Rainy days 12 days  

Humidity 78%  

Windspeed 3 m/s (6 knots)  

Sunshine 150 hours  

Percentage Sunshine  

Daily Historical Temperatures

50-year average (1976-2025)

Based on our historical records, temperatures in Ostrava typically drop from around 19°C (66°F) at the start of September to approximately 16°C (61°F) by the end. Nights are cool, with lows typically ranging from 7°C (45°F) to 11°C (52°F).

Average temperatures in September

‹ Select year to compare to 2026 2025 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988 1987 1986 1985 1984 1983 1982 1981 1980 1979 1978 1977 1976 ›

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

‹ January February March April May June July August September October November December ›

Daily Historical Precipitation

50-year average (1976-2025)

Average daily rainfall for each day of the month based on long-term records.

Average precipitation in September

‹ Select year to compare to 2026 2025 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988 1987 1986 1985 1984 1983 1982 1981 1980 1979 1978 1977 1976 ›

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

‹ January February March April May June July August September October November December ›

Historical weather for Ostrava in September

Browse day-by-day weather records for Ostrava spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Historical weather Temperatures Precipitation

‹ 2026 2025 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988 1987 1986 1985 1984 1983 1982 1981 1980 1979 1978 1977 ›

‹ January February March April May June July August September October November December ›

Ostrava historical weather extremes in September

Based on 49 years of weather observations in Ostrava between 1976 and 2025, these are the recorded extremes.

• The hottest September day on record in Ostrava reached 31°C (88°F) (September 3, 2024).
• On September 30, 2010, Ostrava saw its coldest September day with temperatures maxing out at 6°C (43°F).
• The coldest night in September in Ostrava was on September 28, 1977, with a minimum of 0°C (32°F).

What to Wear in Ostrava in September

For Ostrava in September, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. High rain levels are expected, so pack waterproof gear and an umbrella or poncho. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.

What To Do in Ostrava in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

6/10

Cycling

9/10

Walking

9/10

Camping

4/10

Outdoor sports

9/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Czech Republic, check out our Ostrava's climate page.

More climate data for Ostrava

Temperature Rainfall Sunshine Humidity Wind Speed

See the full Ostrava climate overview or explore weather in Czech Republic.