September weather - Autumn 2024 - Bratislava, Slovakia

Weather in September
Frequently asked questions
Average temperature in September
Average pressure in September
Average wind speed in September
Average humidity in September
Average rainfall in September
Average rainfall days in September
Average snowfall in September
Average snowfall days in September
Average daylight in September
Average sunshine in September
Average sunshine days in September
Average UV index in September
Average cloud cover in September
Average visibility in September

The road bridge leading into the big city of Bratislava in Slovakia

Weather in September

September in Bratislava welcomes the autumnal equinox, characterized by shedding leaves, milder temperatures, and a distinctive charm. As the temperature cools down to a comfortable 21.2°C (70.2°F), it becomes perfect for outdoor activities, including cycling and picnics in the city's parks. Crisp morning air combined with the golden glow of the setting sun paints a picturesque scene. Despite frequent rainfall, the city's charm seems to peak with the arrival of fall.

Temperature

Bratislava's progression into September involves a drop in the average high-temperature, receding from a warm 27.3°C (81.1°F) in August to a pleasant 21.2°C (70.2°F). Bratislava records a steady low-temperature average of 12.1°C (53.8°F) during September.

Humidity

In September, the average relative humidity in Bratislava, Slovakia, is 67%.

Rainfall

In Bratislava, in September, during 10.1 rainfall days, 32mm (1.26") of precipitation is typically accumulated. Throughout the year, in Bratislava, there are 132.9 rainfall days, and 403mm (15.87") of precipitation is accumulated.

Snowfall

In Bratislava, snow does not fall in May through September.

Daylight

The average length of the day in September is 12h and 35min.
On the first day of the month, sunrise is at 06:10 and sunset at 19:32. On the last day of September, in Bratislava, sunrise is at 06:50 and sunset at 18:32 CEST.

Sunshine

In September, the average sunshine is 9.4h.

UV index

The average daily maximum UV index in September in Bratislava is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for average individuals.
Note: The UV index of 4 during September translates into the following guidance:
Put precautions into practice - Protective measures against sun-induced damage are advised. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.

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Frequently asked questions

What is the usual temperature for Bratislava in September?

In Bratislava, in September, the average high-temperature is 21.2°C (70.2°F), and the average low-temperature is 12.1°C (53.8°F). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which represents the influence of relative humidity on air temperature, in August is calculated to be 29°C (84.2°F).

What is the average humidity in September in Bratislava?

In Bratislava, Slovakia, the average relative humidity in September is 67%.

How many days does it rain in September in Bratislava?

In Bratislava, during September, the rain falls for 10.1 days and regularly aggregates up to 32mm (1.26") of precipitation.

When it does not snow in Bratislava?

In Bratislava, snow does not fall in May through September.

Does it snow in Bratislava in September?

In Bratislava, Slovakia, in September, it doesn't snow. In October, it regularly snows.

How many hours of daylight does Bratislava have in September?

In September, the average day length in Bratislava is 12h and 35min.

When is the sunrise / sunset in September in Bratislava?

On the first day of September in Bratislava, sunrise is at 06:10 and sunset at 19:32. On the last day of the month, sunrise is at 06:50 and sunset at 18:32 CEST.

How long on average sun shines in September in Bratislava?

In September, the average sunshine duration in Bratislava is 9.4h.

How high is the UV index in September in Bratislava?

The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium hazard to health from exposure to the Sun's UV radiation.

Today

Tomorrow

Long-term

Year J F M A M J J A September O N D

Aug

September

Oct

Average high temperature

27.3°C 81.1°F

21.2°C 70.2°F

15°C 59°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

11.7km/h 7.3mph

12.4km/h 7.7mph

13.7km/h 8.5mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

19.4

18.2

Average UV index

Average cloud cover

Average visibility

Average temperature in September
Bratislava, Slovakia

Average high temperature in September: 21.2°C

The warmest month (with the highest average high temperature) is August (27.3°C).
The month with the lowest average high temperature is January (2.2°C).

Average low temperature in September: 12.1°C

The month with the highest average low temperature is August (16.1°C).
The coldest month (with the lowest average low temperature) is January (-2.7°C).

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Average pressure in September
Bratislava, Slovakia

Average pressure in September: 1018.1mbar

The month with the highest atmospheric pressure is December (1020.2mbar).
The month with the lowest atmospheric pressure is June (1014.9mbar).

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Average wind speed in September
Bratislava, Slovakia

Average wind speed in September: 11.7km/h

The windiest month (with the highest average wind speed) is February (15.4km/h).
The calmest month (with the lowest average wind speed) is August (10.7km/h).

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Average humidity in September
Bratislava, Slovakia

Average humidity in September: 67%

The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is August (61%).

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Average rainfall in September
Bratislava, Slovakia

Average rainfall in September: 32mm

The wettest month (with the highest rainfall) is June (57mm).
The driest month (with the least rainfall) is April (22mm).

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Average rainfall days in September
Bratislava, Slovakia

Average rainfall days in September: 10.1 days

The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is January (8.5 days).

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Average snowfall in September
Bratislava, Slovakia

Average snowfall in September: 0mm

The month with the highest snowfall is January (107mm).
The months with the least snowfall are May, June, July, August and September (0mm).

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Average snowfall days in September
Bratislava, Slovakia

Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (9 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight in September /
Average sunshine in September
Bratislava, Slovakia

Average daylight in September: 12h and 4min

The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 24min).

Average sunshine in September: 9h and 2min

The month with the most sunshine is August (Average sunshine: 11h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 12min).

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Average sunshine days in September
Bratislava, Slovakia

Average sunshine days in September: 18.2 days

The month with the most sunshine days is October (20 days).
The month with the least sunshine days is May (12.2 days).

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Average UV index in September
Bratislava, Slovakia

Average UV index in September: 4

The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in September
Bratislava, Slovakia

Average cloud cover in September: 32

The month with the most cloud cover is February (Cloud cover 57).
The month with the least cloud cover is August (Cloud cover 24).

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Average visibility in September
Bratislava, Slovakia

Average visibility in September: 10km

The months with the highest visibility are March, April, June, July, August and September (10km).
The month with the lowest visibility is January (8km).

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September weather forecast
Bratislava, Slovakia

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