September weather forecastJamna, Slovenia

September

Weather in September

The first month of the autumn, September, is still a refreshing month in Jamna, Slovenia, with an average temperature fluctuating between 19.5°C (67.1°F) and 10.1°C (50.2°F).

Temperature

September's arrival coincides with a drop in the average high-temperature, decreasing from August's warm 25.1°C (77.2°F) to an enjoyable 19.5°C (67.1°F). September nights in Jamna observe an average temperature dip to a cool 10.1°C (50.2°F).

Humidity

In Jamna, the average relative humidity in September is 81%.

Rainfall

In Jamna, during September, the rain falls for 14.5 days and regularly aggregates up to 77mm (3.03") of precipitation. Throughout the year, there are 188.4 rainfall days, and 935mm (36.81") of precipitation is accumulated.

Snowfall

May through September are months without snowfall.

Daylight

In September, the average length of the day in Jamna is 12h and 33min.
On the first day of the month, sunrise is at 06:16 and sunset at 19:34. On the last day of September, in Jamna, Slovenia, sunrise is at 06:53 and sunset at 18:37 CEST.

Sunshine

In Jamna, the average sunshine in September is 8.7h.

UV index

In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: The maximum UV index, 4 during September, leads to the following recommendations:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. Stay sun-safe with clothing that is both closely woven and worn loosely.

Updated: Jan 26, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

During September, Jamna experiences an average high-temperature of 19.5°C (67.1°F) and a low-temperature of 10.1°C (50.2°F).

In Jamna, the average relative humidity in September is 81%.

In Jamna, in September, it is raining for 14.5 days, with typically 77mm (3.03") of accumulated precipitation.

In Jamna, Slovenia, snow does not fall in May through September.

In Jamna, Slovenia, in September, it doesn't snow. In October, it regularly snows.

In September, the average day length in Jamna, Slovenia, is 12h and 33min.

On the first day of September in Jamna, Slovenia, sunrise is at 06:16 and sunset at 19:34. On the last day of the month, sunrise is at 06:53 and sunset at 18:37 CEST.

The average sunshine duration in September in Jamna, Slovenia, is 8.7h.

In Jamna, Slovenia, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate health threat 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

25.1°C

19.5°C

14.6°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

6.7km/h

6.8km/h

7.7km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

12.1

12.5

15.7

Average UV index

Average cloud cover

Average visibility

Average temperature in September
Jamna, Slovenia

Average high temperature in September: 19.5°C

The warmest month (with the highest average high temperature) is August (25.1°C).
The month with the lowest average high temperature is January (2.5°C).

Average low temperature in September: 10.1°C

The month with the highest average low temperature is August (13.8°C).
The coldest month (with the lowest average low temperature) is January (-3.1°C).

Average pressure in September
Jamna, Slovenia

Average pressure in September: 1018.1mbar

The month with the highest atmospheric pressure is December (1020.6mbar).
The months with the lowest atmospheric pressure are May and June (1015.1mbar).

Average wind speed in September
Jamna, Slovenia

Average wind speed in September: 6.5km/h

The windiest month (with the highest average wind speed) is March (9km/h).
The calmest month (with the lowest average wind speed) is August (6.2km/h).

Average humidity in September
Jamna, Slovenia

Average humidity in September: 81%

The month with the highest relative humidity is November (86%).
The month with the lowest relative humidity is April (73%).

Average rainfall in September
Jamna, Slovenia

Average rainfall in September: 77mm

The wettest month (with the highest rainfall) is May (139mm).
The driest month (with the least rainfall) is January (38mm).

Average rainfall days in September
Jamna, Slovenia

Average rainfall days in September: 14.5 days

The month with the highest number of rainy days is May (24 days).
The month with the least rainy days is February (10.8 days).

Average snowfall in September
Jamna, Slovenia

Average snowfall in September: 0mm

The month with the highest snowfall is February (210mm).
The months with the least snowfall are May, June, July, August and September (0mm).

Average snowfall days in September
Jamna, Slovenia

Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (12 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in September /
Average sunshine in September
Jamna, Slovenia

Average daylight in September: 12h and 36min

The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).

Average sunshine in September: 8h and 42min

The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 6min).