Olomouc Monthly Rainfall & Precipitation
This page shows both the average monthly rainfall and the number of rainy days in Olomouc, Olomouc Region, Czech Republic. The figures are based on a 30-year period (1990–2020) to provide a reliable average. Let's now guide you through the details for a complete overview.
Generally, Olomouc receives mid-range precipitation levels, with 738 mm (29 in) annually.
Monthly Rainfall & Rainy Days
Monthly Precipitation Levels
The average number of days each month with precipitation (> 0.2 mm (0.01 in))
Significant seasonal changes in precipitation occur throughout the year. During the wettest month, July receives substantial rainfall, averaging 93 mm (3.7 in) of precipitation, recorded across 14 rainy days.
In contrast, the driest month, February brings less snow/rainfall, with 43 mm (1.7 in) over 11 snowy/rainy days.
July, the wettest month, has a maximum daytime temperature of 25°C (77°F). The city receives 245 hours of sunshine in this period. During the driest month February you can expect a temperature of 4°C (39°F). For more detailed insights into the city's temperatures, visit our Olomouc Temperature page.
Daily Historical Precipitation
Average daily rainfall for each day of the month based on long-term records. 50-year average (1976-2025)
Average precipitation in August
Explore Olomouc's Historical Precipitation: 1976-2026
Browse day-by-day precipitation records for Olomouc spanning 51 years. Select any month and year to see actual rainfall and snowfall recorded on each day.
Annual Rainfall in Czech Republic: City Comparison
The map below shows the annual precipitation across Czech Republic. You can also select the different months in case you are interested in a specific month.
Olomouc vs World: Rainfall Compared
Olomouc's average annual precipitation is 738 mm (29 in). Let's compare this to some popular worldwide tourist destinations:
The city of Rome, Italy, has an average annual precipitation of 832 mm (33 in), spread fairly evenly throughout the year.
Osaka, Japan, experiences 1507 mm (59 in) of rainfall annually, spread across the year with wetter summers.
Adelaide, Australia, enjoys 511 mm (20 in) of annual precipitation, with dry summers and wet winters.
Ho Chi Minh City, Vietnam, receives 1955 mm (77 in) of annual rainfall, with a pronounced wet season from May to November, typical of its tropical monsoon climate.
Precipitation amounts are measured using specific gauges installed at weather stations, collecting both rain and snow and any other type of precipitation. Rainfall is measured directly in millimeters, while that from snow and ice is obtained by melting it. Automated systems often incorporate heaters to make this easier.
Information from these stations is transmitted via Wi-Fi, satellite, GPS, or telephone connections to central monitoring networks. This information is immediately updated and integrated into weather models and forecasts.
Precipitation has a very strong role in determining the local climate and ecosystem:
- Changing Rainfall Patterns: Global warming causes drastic changes in the patterns of rainfall. Some areas have been experiencing increased frequency and intensity of rainfall, while other areas experience longer dry spells or even droughts.
- Local Impacts: Many regions are experiencing heavier rainfall in the winter months and drier, hotter summers. This affects agriculture, water resources, and ecosystems.
- The U.S. has a significant number of thunderstorms every year, with over 14.6 million taking place across the world annually.
- Approximately 70% of lightning bolts strike land rather than oceans.
- A storm named John was the longest-lasting Pacific tropical storm, continuing for 31 days. As it crossed the dateline twice, it changed status from a hurricane to a typhoon and back to a hurricane.
For more detailed information about Olomouc's weather, including sunshine hours, humidity levels, and temperature data, visit our Olomouc Climate page.
Olomouc Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Olomouc - and find the best time to visit.
Olomouc 3-Day Forecast
Temperature Rainfall Sunshine Humidity
See the full Olomouc climate overview or explore weather in Czech Republic.
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