May Weather in Brno, Czech Republic

Last updated: April 1, 2025

In May, Brno, Czech Republic, experiences a delightful shift in weather as temperatures begin to rise, with maximums reaching up to 31°C (87°F) and a comfortable average of 13°C (56°F). While the minimum dips to a crisp -1°C (30°F) during the nights, the month is characterized by vibrant days filled with sunlight. However, residents and visitors should be prepared for some rain, with precipitation totaling 82 mm (3.2 in) over approximately 15 days, resulting in a notable humidity level of 73%. This blend of warmth and moisture fosters a lush environment, making May an ideal month for enjoying the natural beauty of Brno.

May Temperature in Brno

In May, Brno, Czech Republic, welcomes a delightful transition into spring, marked by rising temperatures that bring a sense of warmth and vitality to the city. With overnight lows around -1°C (30°F) and daytime highs reaching up to 31°C (87°F), the average temperature climbs to a comfortable 13°C (56°F), creating an inviting atmosphere for outdoor activities and exploration. The month showcases a stark contrast to the colder months preceding it, such as January with its chilling lows of -17°C (2°F). May's pleasant warmth signals the onset of vibrant outdoor festivals, blooming gardens, and a bustling café culture as residents and tourists alike embrace the milder climate. As the city sheds its winter coat, it transforms into a lively hub of activity, embodying the spirit of renewal that comes with longer days and sunnier skies.

May Weather in Brno: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Brno, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec303440485666676859504134
Data source: Temperature data for Brno generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

May Precipitation in Brno

May marks a significant shift in precipitation patterns in Brno, Czech Republic, with average rainfall soaring to 82 mm (3.2 in) over 15 days of the month. This is a noticeable increase from the preceding months, as April recorded just 36 mm (1.4 in) with 9 days of rain. The uptick in rainfall not only signals the arrival of spring's full bloom but also contributes to a lush landscape as the region transitions towards summer. Interestingly, this trend continues into June and July, where precipitation remains high, indicating that May serves as a vital precursor to the wetter months ahead. This consistent precipitation may also have implications for local agriculture and water supply, highlighting May as an essential month in Brno's climatic calendar.

May Precipitation Trends in Brno

The chart displays monthly precipitation patterns in Brno, with values for each month alongside May's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec333536368279807191564651
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

May Humidity in Brno

As spring transitions into summer, May in Brno, Czech Republic, experiences a notable decrease in humidity, averaging 73%. This marks a significant drop from the more humid months of winter, where January hovered around 90%, and gradually declined through April's 78%. The refreshing air of May sets the stage for a pleasant shift, as residents and visitors alike enjoy milder conditions. Following this, humidity begins to rise slightly again in June, settling at 77%, but May stands out as a month of relative comfort in the annual cycle, ushering in the vibrant energy of summer.

May Average Humidity in Brno

This chart illustrates the average monthly humidity levels in Brno, with May's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how May's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec90%87%85%78%74%77%76%76%75%85%90%91%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Brno

In May, Brno experiences a significant increase in UV exposure, with the UV Index soaring to a striking 8, placing it in the very high exposure category. This shift from earlier months underscores the importance of sun safety, as the burn time drops dramatically to just 15 minutes. As spring unfolds, residents and visitors alike should be particularly vigilant, adopting protective measures to avoid skin damage. The trend observed from April, where the UV Index was 6 and the burn time was 25 minutes, points to the intensifying sun, encouraging everyone to be mindful of outdoor activities. For more detailed information on UV levels, check out the Brno UV Index.

Maximum UV Index Levels in Brno for May

The chart shows the monthly maximum UV Index (UVI) for Brno in May, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec235688876422
Data source: Brno May UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

May Sunshine in Brno

As spring unfolds in Brno, May emerges as a beacon of warmth and light, boasting an impressive 381 hours of sunshine. This marks a significant increase compared to previous months, reflecting the gradual shift from the shadows of winter to the vibrant embrace of summer. With the sunshine hours steadily rising from 130 in January to 334 in April, May solidifies its position as a pivotal month, offering a delightful preview of the sun-drenched days of summer ahead. Following May, June and July continue the trend, peaking at 411 and 433 hours respectively, before the sunlight gradually tapers off towards autumn. The progression of sunshine hours not only brightens the days but also invigorates the spirit, encouraging both locals and visitors to embrace the blossoming outdoors.

Monthly Sunshine Duration in Brno: May Highlighted

The May sunshine duration represents the total number of hours Brno experiences direct sunlight during the month of May, excluding cloudy or obstructed periods. This chart compares the sunshine duration of May with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec130h210h295h334h381h411h433h386h315h266h177h157h
Data source: Brno May Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Brno During May

When considering the likelihood of sunny weather in May in Brno, Czech Republic, it's interesting to observe the overall trend leading up to this month. While January starts off with a mere 22% chance of sunshine, this figure gradually climbs to a peak of 50% in March, suggesting that spring brings a significant increase in sunny days. However, as April rolls around, the likelihood dips slightly to 36%, and in May, it settles at 35%. This fluctuation indicates that while May shows potential for sunny weather, it might not be as reliable as the early spring months. Following May, the chance of sun increases again, reaching 47% in June, hinting at a promising transition into summer. In summary, while May offers a fair chance of sunshine, it remains unpredictable in comparison to both the early spring and the summer months that follow.

Percentage of Sunny Days in May in Brno

The chart illustrates the percentage of sunny days in Brno throughout the year, with May highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Brno experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec22%31%50%36%35%47%43%34%46%46%23%17%
Data source: Brno May chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Brno in May

As the year progresses in Brno, Czech Republic, the duration of daylight reveals a captivating rhythm that echoes the changing seasons. Starting with a modest 8 hours in January, daylight gradually stretches, reaching 10 hours in February and 11 hours in March, signaling the approach of spring. By April, days grow noticeably longer with 13 hours of daylight, culminating in May with an inviting 15 hours that ushers in the warmth of late spring. This trend peaks in June at 16 hours, providing ample time for outdoor activities. However, as summer wanes, daylight begins its gentle retreat, decreasing to 15 hours in July and sliding down to 14 hours in August. The shorter days persist through September and October, as Brno faces a gradual descent back to winter’s initial count of 8 hours by December. This cycle not only highlights the beauty of Brno's changing seasons but also invites residents and visitors alike to embrace the vibrant energy of longer days into the heart of spring and summer.

Average Daylight Hours in Brno for May

The chart illustrates the variation in daylight duration in Brno throughout the year, with May highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec8h 41m10h 8m11h 55m13h 45m15h 20m16h 9m15h 43m14h 18m12h 32m10h 43m9h 5m8h 14m
Data source: Brno daylight hours, calculated by summing the hours between sunrise and sunset for each day.

May Winds in Brno

In May, Brno experiences a noticeable uptick in its average wind speed, reaching 3.7 m/s (8 mph), which marks a gentle transition into summer. This increase follows the slightly breezier April at 3.6 m/s (8 mph), establishing a trend of escalating winds as the seasons shift. The months preceding May, especially March, show lower speeds, with an average of just 2.9 m/s (7 mph), illustrating a consistent pattern where spring heralds a bit more bluster. As the warmer months approach, the winds begin to settle down again, with June showing a decline to 2.5 m/s (6 mph), hinting that while May prides itself on a spirited breeze, summer may bring a calmer atmosphere. Overall, May's winds evoke a sense of vitality, reflective of the season's blossoming energy.

Average May Wind Speed in Brno

The chart displays monthly wind speed patterns in Brno, with values for each month shown alongside May's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how May's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec3.03.12.93.63.7 m/s2.52.82.62.63.53.23.3
Data source: Brno May wind data, generated using information from the Copernicus Climate Change Service.

How May Weather in Brno Compares to Other Months

The weather in Brno changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of May's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Brno and find detailed weather information for every month.

Comparing the weather in May and January reveals a stark contrast. In May, temperatures range from a minimum of -1°C (30°F) to a warm average of 13°C (56°F), peaking at 31°C (87°F). This month experiences significant rainfall, with 82 mm (3.2 in) of precipitation over 15 days, and humidity averaging around 73%. In contrast, January presents a much harsher climate, with temperatures plunging to a minimum of -17°C (2°F) and an average of -1°C (31°F), reaching a maximum of only 12°C (54°F). Precipitation is lower, totaling 33 mm (1.3 in) over just 9 days, and humidity remains high at 90%. The differences in temperature and precipitation highlight the seasonal shift between these two months. For more information about January weather in Brno, you can visit Brno weather in January.

May and February present contrasting weather patterns in terms of temperature and precipitation. In May, the temperature ranges from a chilly -1°C (30°F) to a warm 31°C (87°F), with an average of 13°C (56°F), making it a much more temperate and pleasant month. The total precipitation is 82 mm (3.2 in) over approximately 15 days, resulting in higher humidity at 73%. In stark contrast, February experiences much colder temperatures, with a minimum of -15°C (4°F), an average of 1°C (34°F), and a maximum of 15°C (60°F). Precipitation is lower, totaling 35 mm (1.4 in) over about 8 days, albeit with higher humidity at 87%. For a closer look at the specifics of February weather, visit Brno weather in February.

In comparing the weather between May and March, it's clear that May offers a much warmer climate, with average temperatures reaching 13°C (56°F) and highs soaring up to 31°C (87°F). In contrast, March is significantly chillier, with an average of just 4°C (40°F) and occasional highs of 21°C (69°F). Additionally, May experiences more precipitation, totaling 82 mm (3.2 in) over 15 days, compared to March's 35 mm (1.4 in) over just 7 days. Humidity levels are also higher in March at 85%, compared to 73% in May. For more detailed information, you can check out Brno weather in March.

Comparing the weather of May to that of April reveals a notable transition as spring progresses into summer. May experiences a wider temperature range, with minimums of -1°C (30°F) and maximums soaring to 31°C (87°F), resulting in an average of 13°C (56°F). In contrast, April has cooler temperatures, where the minimum dips to -6°C (21°F) and the maximum reaches only 26°C (80°F), giving it an average temperature of 9°C (49°F). Additionally, May is marked by higher precipitation levels, totaling 82 mm (3.2 in) over 15 days, compared to April's 36 mm (1.4 in) over just 9 days. Humidity is slightly lower in May at 73%, whereas April maintains a higher level at 78%. For more details, you can check Brno weather in April.

May weather shows a broader temperature range, with minimums dipping to -1°C (30°F) and a maximum of 31°C (87°F), contributing to an average of 13°C (56°F). In contrast, June experiences a higher average temperature of 19°C (67°F), with minimums starting at 6°C (43°F) and maximums peaking at 32°C (90°F). Both months have relatively similar precipitation levels, with May seeing 82 mm (3.2 in) across 15 days and June slightly lower at 79 mm (3.1 in) over 12 days. Additionally, humidity remains high in both months, with May at 73% and June slightly increasing to 77%. For more detailed information, you can visit Brno weather in June.

May and July exhibit distinct weather patterns, with May showcasing a wider temperature range from a chilly minimum of -1°C (30°F) to a warm maximum of 31°C (87°F). The month averages around 13°C (56°F) and experiences fairly frequent precipitation, totaling 82 mm (3.2 in) over approximately 15 days, while maintaining a humidity level of 73%. In contrast, July typically offers milder conditions, with temperatures ranging from a minimum of 5°C (41°F) to a maximum of 33°C (92°F), and an average temperature of 20°C (67°F). The precipitation in July is slightly lower at 80 mm (3.1 in) over about 12 days, and humidity rises marginally to 76%. For a detailed look at July's climate, you can visit Brno weather in July.

In May, temperatures in Brno can fluctuate significantly, with a minimum of -1°C (30°F) and a maximum reaching up to 31°C (87°F), averaging around 13°C (56°F). The month is relatively humid, averaging 73%, and experiences about 82 mm (3.2 in) of precipitation over approximately 15 days. In contrast, August presents a warmer climate, with minimum temperatures of 7°C (45°F) and highs of 34°C (93°F), averaging 20°C (69°F). Precipitation is slightly lower in August, at 71 mm (2.8 in), over 12 days, while humidity remains high at 76%. For a detailed overview, you can explore the Brno weather in August.

May and September both exhibit a range of temperatures, with May showing a broader spectrum from a chilly minimum of -1°C (30°F) to a warm maximum of 31°C (87°F). In contrast, September starts slightly warmer with a minimum of 0°C (31°F) and peaks at 30°C (86°F). Both months experience a fair amount of precipitation, but September sees slightly higher rainfall at 91 mm (3.6 in) compared to May's 82 mm (3.2 in), with September having fewer rainy days at 10 versus May's 15. Humidity is fairly consistent in both months, hovering around 73% in May and 75% in September. For a closer look at the weather specifics in September, you can visit Brno weather in September.

May and October exhibit distinct weather patterns that reflect the transition between spring and autumn. In May, temperatures range from a chilly minimum of -1°C (30°F) to a warm maximum of 31°C (87°F), with an average temperature of 13°C (56°F). The month sees about 82 mm (3.2 in) of precipitation spread over 15 days, accompanied by a relatively moderate humidity of 73%. In contrast, October presents cooler conditions, with temperatures dropping to a minimum of -2°C (28°F) and peaking at 22°C (72°F), resulting in an average of 10°C (50°F). The month receives less precipitation, totaling 56 mm (2.2 in) over 10 days, but experiences higher humidity levels at 85%. For more details on October weather, you can visit Brno weather in October.

May and November present contrasting weather patterns. In May, temperatures range from a chilly minimum of -1°C (30°F) to a pleasant maximum of 31°C (87°F), with an average of 13°C (56°F). The month sees about 82 mm (3.2 in) of precipitation over 15 days, accompanied by a humidity level of 73%. In stark contrast, November experiences much cooler conditions, with temperatures dipping from a low of -8°C (18°F) to a high of only 16°C (62°F), averaging around 5°C (41°F). This month has lower precipitation at 46 mm (1.8 in), spread over 9 days, but it has a higher humidity level of 90%. For more information on November weather, check out Brno weather in November.

May and December present stark contrasts in weather. In May, temperatures range from a chilly minimum of -1°C (30°F) to a warming maximum of 31°C (87°F), averaging around 13°C (56°F). The month sees an average of 82 mm (3.2 in) of precipitation over 15 days, with a humidity level of 73%. In contrast, December experiences colder conditions, with temperatures dipping as low as -7°C (20°F) and peaking at just 10°C (51°F), resulting in an average of only 1°C (34°F). Precipitation is relatively lighter at 51 mm (2.0 in) across 13 days, while humidity rises significantly to 91%. For a more detailed outlook on December weather, visit Brno weather in December.

Compare Brno's Climate with Cities Worldwide

Conclusion: What to Expect From May Weather in Brno

As spring transitions to summer, May in Brno brings a delightful mix of conditions that stand out from the other months. While temperatures can soar to a warm 31°C (87°F), the average remains a comfortable 13°C (56°F), making it a pleasant time to enjoy the outdoors. However, with around 15 days of rain contributing to an average of 82 mm in precipitation, the month often showcases a balance of sun and showers. Higher humidity levels at 73% can add a layer of warmth, creating a unique atmosphere that differs from the drier, milder months that preceded it. Experience the vibrant and variable May weather in Brno for yourself, and explore more details on the Brno Climate.