September weather forecast
Mostar, Bosnia and Herzegovina

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Weather in September

September heralds a shift from the summer heat to milder autumn weather in Mostar. With a predictable amount of rainfall, amounting to 54mm (2.13"), the city undergoes a delightful seasonal change. The gradual decline in temperature adds autumn's characteristic crispiness to the air. Amid the mild sunlight and the cooler evenings, the cityscape alters, signalling the arrival of fall. Overall, September is marked by delightful weather, allowing prolific touristic exploration and outdoor engagement.

Temperature

Start of September brings a shift in the average high-temperature, falling from August's warm 27.8°C (82°F) to an agreeable 21.6°C (70.9°F). Throughout the month of September, Mostar expects an average low of 10.5°C (50.9°F).

Humidity

The average relative humidity in September is 70%.

Rainfall

In Mostar, in September, during 11.8 rainfall days, 54mm (2.13") of precipitation is typically accumulated. In Mostar, during the entire year, the rain falls for 163.7 days and collects up to 962mm (37.87") of precipitation.

Snowfall

In Mostar, snow does not fall in May through October.

Daylight

The average length of the day in September in Mostar, Bosnia and Herzegovina, is 12h and 30min.
On the first day of the month, sunrise is at 06:13 and sunset at 19:23. On the last day of September, sunrise is at 06:45 and sunset at 18:31 CEST.

Sunshine

In Mostar, the average sunshine in September is 10h.

UV index

In Mostar, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: The maximum UV index of 4 during September leads to these instructions:
Exercise prevention - Precautions against solar damage are endorsed. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.

Frequently asked questions

What is the usual temperature for Mostar in September?

During September, Mostar experiences an average high-temperature of 21.6°C (70.9°F) and a low-temperature of 10.5°C (50.9°F). In August, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which represents the influence of relative humidity on air temperature, is appraised at 29°C (84.2°F).

What is the average humidity in September in Mostar?

In Mostar, Bosnia and Herzegovina, the average relative humidity in September is 70%.

How many days does it rain in September in Mostar?

In Mostar, Bosnia and Herzegovina, during September, the rain falls for 11.8 days and regularly aggregates up to 54mm (2.13") of precipitation.

When it does not snow in Mostar?

May through October are months without snowfall in Mostar, Bosnia and Herzegovina.

What is the average length of the day in September in Mostar?

The average day length in September is 12h and 30min.

What time are sunrise and sunset in September in Mostar?

On the first day of September in Mostar, sunrise is at 06:13 and sunset at 19:23. On the last day of the month, sunrise is at 06:45 and sunset at 18:31 CEST.

How long on average sun shines in September in Mostar?

The average sunshine duration in September in Mostar, Bosnia and Herzegovina, is 10h.

What is the UV index reading in September in Mostar?

In September, the average daily maximum UV index in Mostar is 4. A UV Index value of 3 to 5 symbolizes a moderate health threat from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover

Average temperature in September
Mostar, Bosnia and Herzegovina

Average temperature in September - Mostar, Bosnia and Herzegovina
  • Average high temperature in September: 21.6°C

The warmest month (with the highest average high temperature) is August (27.8°C).
The month with the lowest average high temperature is January (4.8°C).

  • Average low temperature in September: 10.5°C

The month with the highest average low temperature is August (14.1°C).
The coldest month (with the lowest average low temperature) is January (-1.9°C).

Average pressure in September
Mostar, Bosnia and Herzegovina

Average pressure in September - Mostar, Bosnia and Herzegovina
  • Average pressure in September: 1016.6mbar

The month with the highest atmospheric pressure is December (1019.7mbar).
The month with the lowest atmospheric pressure is July (1014.3mbar).

Average wind speed in September
Mostar, Bosnia and Herzegovina

Average wind speed in September - Mostar, Bosnia and Herzegovina
  • Average wind speed in September: 8.7km/h

The windiest month (with the highest average wind speed) is February (11km/h).
The calmest months (with the lowest average wind speed) are July and August (8km/h).

Average humidity in September
Mostar, Bosnia and Herzegovina

Average humidity in September - Mostar, Bosnia and Herzegovina
  • Average humidity in September: 70%

The month with the highest relative humidity is February (85%).
The month with the lowest relative humidity is August (62%).

Average rainfall in September
Mostar, Bosnia and Herzegovina

Average rainfall in September - Mostar, Bosnia and Herzegovina
  • Average rainfall in September: 54mm

The wettest month (with the highest rainfall) is November (152mm).
The driest month (with the least rainfall) is August (29mm).

Average rainfall days in September
Mostar, Bosnia and Herzegovina

Average rainfall days in September - Mostar, Bosnia and Herzegovina
  • Average rainfall days in September: 11.8 days

The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is August (9.2 days).

Average snowfall in September
Mostar, Bosnia and Herzegovina

Average snowfall in September - Mostar, Bosnia and Herzegovina
  • Average snowfall in September: 0mm

The month with the highest snowfall is February (55mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).

Average snowfall days in September
Mostar, Bosnia and Herzegovina

Average snowfall days in September - Mostar, Bosnia and Herzegovina
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (2.2 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight in September /
Average sunshine in September
Mostar, Bosnia and Herzegovina

Average daylight in September / Average sunshine in September - Mostar, Bosnia and Herzegovina
  • Average daylight in September: 12h and 3min

The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 0min).

  • Average sunshine in September: 10h

The month with the most sunshine is August (Average sunshine: 12h).
The month with the least sunshine is February (Average sunshine: 5h).

Average sunshine days in September
Mostar, Bosnia and Herzegovina

Average sunshine days in September - Mostar, Bosnia and Herzegovina
  • Average sunshine days in September: 15.9 days

The month with the most sunshine days is August (18.8 days).
The month with the least sunshine days is May (10.8 days).

Average UV index in September
Mostar, Bosnia and Herzegovina

Average UV index in September - Mostar, Bosnia and Herzegovina
  • Average UV index in September: 4

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

Average cloud cover in September
Mostar, Bosnia and Herzegovina

Average cloud cover in September - Mostar, Bosnia and Herzegovina
  • Average cloud cover in September: 23

The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 13).

Average visibility in September
Mostar, Bosnia and Herzegovina

Average visibility in September - Mostar, Bosnia and Herzegovina
  • Average visibility in September: 10km

The months with the highest visibility are June, July, August and September (10km).
The months with the lowest visibility are January, February, March, April, May, October, November and December (9km).

Mostar, Bosnia and Herzegovina

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