Brno, Czechia — Weather in May 2027

Monthly climate averages for Brno, Czechia. Based on 10-year ERA5 reanalysis data.

Cfb Oceanic
7 /10
Good

May is a good month in Brno

Climate Overview

Brno, Czechia in May has mild conditions, with highs averaging 18.9°C (66°F) and noticeably cooler mornings. Rain falls on about 13 days this month.

This month falls at the end of Spring.

Daily highs in May gradually rise from around 18°C (64°F) at the start to 21°C (70°F) by month's end.

Rainfall is heaviest during the middle of the month, while the first third tends to be drier.

Expect around 10.7h of sunshine at the start of May, increasing to 12.0h by the end.

The warmest days tend to fall around the 31th, averaging 21.2°C (70°F).

Compared to April, this month is about 4°C warmer with 4 more rainy days. Temperatures will rise further into June.

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Monthly May Averages

Temperature
19°C / 9°C
Feels Like
17°C / 7°C
Rain
13 days · 67 mm
Sunshine
10.8h / day
Humidity
69% — Humid
Wind
17 km/h
Wind Direction
N (11°)
Gusts
37 km/h
Daylight
15.3 h
Cloud Cover
62%
Clear Sky Days
2.5
UV Index
5.5 — High
Dew Point
9°C — Dry
Moon Phase
Waxing Gibbous · 66%

Climate Charts

Daily averages based on historical data (2016–2025)

Daily Temperature

28°C 24°C 20°C 16°C 12°C 8°C 4°C 0°C 151015202531
High Low

Daily Precipitation

0 mm 2 mm 4 mm 6 mm 8 mm 151015202531
Rainfall

Daily Sunshine

0h 4h 8h 12h 16h 151015202531
Sunshine

Daily Wind Speed

0 5 10 15 20 25 151015202531
Wind Speed
Sun Position
Sunrise 05:11
Daylight 15.3h
Sunset 20:30

What to Expect

Keep afternoons flexible as tropical showers are common — they typically clear within an hour.

Rain usually comes in shorter passing showers rather than all-day rain.

2 of the last 5 yearly records were warmer than this month's long-run average.

Compare Months

January
Poor
Temp
3°C / -3°C
Feels Like
-1°C / -7°C
Rain
9days (34 mm) Wet
Sun
4.1h Fair
Humidity
83% Humid
UV
1.2 Low
Snow Days
11days
View Details
February
Poor
Temp
6°C / -1°C
Feels Like
2°C / -5°C
Rain
8days (32 mm) Wet
Sun
5.8h Fair
Humidity
78% Humid
UV
1.9 Low
Snow Days
6days
View Details
March
Poor
Temp
10°C / 1°C
Feels Like
6°C / -3°C
Rain
8days (34 mm) Wet
Sun
8.1h Good
Humidity
72% Muggy
UV
3.4 Moderate
Snow Days
3days
View Details
April
Fair
Temp
15°C / 5°C
Feels Like
12°C / 2°C
Rain
9days (42 mm) Wet
Sun
9.7h Good
Humidity
67% Muggy
UV
4.6 Moderate
Snow Days
2days
View Details
May
Good
Temp
19°C / 9°C
Feels Like
17°C / 7°C
Rain
13days (67 mm) Wet
Sun
10.8h Excellent
Humidity
69% Muggy
UV
5.5 High
View Details
June best
Excellent
Temp
25°C / 15°C
Feels Like
25°C / 14°C
Rain
12days (73 mm) Wet
Sun
12.3h Excellent
Humidity
68% Muggy
UV
6.2 High
View Details
July best
Excellent
Temp
26°C / 16°C
Feels Like
26°C / 16°C
Rain
12days (77 mm) Wet
Sun
12.2h Excellent
Humidity
65% Muggy
UV
6.1 High
View Details
August best
Excellent
Temp
26°C / 16°C
Feels Like
26°C / 16°C
Rain
10days (71 mm) Wet
Sun
10.8h Excellent
Humidity
67% Muggy
UV
5.2 High
View Details
September best
Excellent
Temp
21°C / 12°C
Feels Like
20°C / 11°C
Rain
10days (87 mm) Wet
Sun
8.7h Good
Humidity
73% Muggy
UV
4 Moderate
View Details
October
Fair
Temp
15°C / 7°C
Feels Like
13°C / 5°C
Rain
10days (46 mm) Wet
Sun
6.4h Fair
Humidity
80% Humid
UV
2.5 Moderate
View Details
November
Poor
Temp
8°C / 2°C
Feels Like
5°C / -1°C
Rain
9days (44 mm) Wet
Sun
3.8h Poor
Humidity
86% Very Muggy
UV
1.5 Low
Snow Days
4days
View Details
December
Poor
Temp
4°C / -1°C
Feels Like
0°C / -5°C
Rain
10days (42 mm) Wet
Sun
3.1h Poor
Humidity
87% Very Muggy
UV
1 Low
Snow Days
9days
View Details
Month Temp Feels Like Rain Sun Humidity UV Status
January 3°C / -3°C -1°C / -7°C 9days (34 mm) Wet 4.1h Fair 83% Humid 1.2 Low Poor View Details
February 6°C / -1°C 2°C / -5°C 8days (32 mm) Wet 5.8h Fair 78% Humid 1.9 Low Poor View Details
March 10°C / 1°C 6°C / -3°C 8days (34 mm) Wet 8.1h Good 72% Muggy 3.4 Moderate Poor View Details
April 15°C / 5°C 12°C / 2°C 9days (42 mm) Wet 9.7h Good 67% Muggy 4.6 Moderate Fair View Details
May 19°C / 9°C 17°C / 7°C 13days (67 mm) Wet 10.8h Excellent 69% Muggy 5.5 High Good View Details
June best 25°C / 15°C 25°C / 14°C 12days (73 mm) Wet 12.3h Excellent 68% Muggy 6.2 High Excellent View Details
July best 26°C / 16°C 26°C / 16°C 12days (77 mm) Wet 12.2h Excellent 65% Muggy 6.1 High Excellent View Details
August best 26°C / 16°C 26°C / 16°C 10days (71 mm) Wet 10.8h Excellent 67% Muggy 5.2 High Excellent View Details
September best 21°C / 12°C 20°C / 11°C 10days (87 mm) Wet 8.7h Good 73% Muggy 4 Moderate Excellent View Details
October 15°C / 7°C 13°C / 5°C 10days (46 mm) Wet 6.4h Fair 80% Humid 2.5 Moderate Fair View Details
November 8°C / 2°C 5°C / -1°C 9days (44 mm) Wet 3.8h Poor 86% Very Muggy 1.5 Low Poor View Details
December 4°C / -1°C 0°C / -5°C 10days (42 mm) Wet 3.1h Poor 87% Very Muggy 1 Low Poor View Details

What to Wear

Dress in layers — a mix of long sleeves, light sweaters, and a versatile jacket works best for changeable conditions.

A waterproof jacket or compact umbrella is recommended for occasional showers.

Packing List

Warm evening layerUmbrellaWaterproof jacketComfortable walking shoes

Frequently Asked Questions

May is typically good for visiting Brno, with average highs of 19°C (66°F) and around 13 rainy days. Brno, Czechia in May has mild conditions, with highs averaging 18.9°C (66°F) and noticeably cooler mornings. Rain falls
Brno typically sees around 13 rainy days in May with 67 mm (2.6 in) of total rainfall. Pack a waterproof jacket.
Nights in Brno during May are cool at around 9°C (49°F). Bring a jacket or sweater for evenings.
With highs of 19°C (66°F) and lows of 9°C (49°F) in May, we recommend: Warm evening layer, Umbrella, Waterproof jacket, Comfortable walking shoes. Comfortable walking shoes are essential.
May is not the most favourable month weather-wise in Brno. Consider visiting during months with milder temperatures or less rainfall for a better experience.
The average UV index in Brno during May is 6 (high). Wear sunscreen SPF 30+, a hat, and sunglasses. Limit direct sun exposure between 10 AM and 4 PM.
Brno gets approximately 15 hours of daylight per day in May, with around 11 hours of sunshine.
Snow is uncommon in Brno during May based on 10-year climate averages.

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