September weather forecastAlsterbro, Sweden

September

Weather in September

The first month of the autumn, September, is still a refreshing month in Alsterbro, Sweden, with an average temperature varying between 9.7°C (49.5°F) and 16.8°C (62.2°F).

Temperature

Transition into September subtly marks a drop in the average high-temperature, moderately moving from an agreeable 21.5°C (70.7°F) in August to an enjoyable 16.8°C (62.2°F). During the nights in September, the temperature averages to a frosty 9.7°C (49.5°F).

Humidity

The average relative humidity in September is 79%.

Rainfall

In Alsterbro, during September, the rain falls for 9.7 days and regularly aggregates up to 16mm (0.63") of precipitation. Throughout the year, there are 120.7 rainfall days, and 261mm (10.28") of precipitation is accumulated.

Snowfall

In Alsterbro, snow does not fall in June through September.

Daylight

The average length of the day in September is 12h and 46min.
On the first day of the month, sunrise is at 05:59 and sunset at 19:52. On the last day of September, in Alsterbro, sunrise is at 06:58 and sunset at 18:33 CEST.

Sunshine

In Alsterbro, the average sunshine in September is 8.2h.

UV index

In Alsterbro, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for average individuals.
Note: In September, the maximum UV index of 4 transforms into these recommendations:
Act with care - The suggestion to avoid sunburn is emphasized. To protect against the Sun's most potent rays, avoid direct exposure around midday. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.

Updated: Jan 31, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

An average high-temperature, in September, in Alsterbro, is 16.8°C (62.2°F) and the average low-temperature is 9.7°C (49.5°F).

The average relative humidity in September in Alsterbro, Sweden, is 79%.

In Alsterbro, in September, it is raining for 9.7 days, with typically 16mm (0.63") of accumulated precipitation.

June through September are months without snowfall in Alsterbro.

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

The average day length in September in Alsterbro, Sweden, is 12h and 46min.

In September, on the first day of the month, sunrise is at 05:59 and sunset at 19:52. On the last day of the month, in Alsterbro, sunrise is at 06:58 and sunset at 18:33 CEST.

The average sunshine duration in September in Alsterbro is 8.2h.

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

Today

Tomorrow

Long-term

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

Aug

September

Oct

Average high temperature

21.5°C

16.8°C

10.9°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

12.9km/h

13.9km/h

15.1km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

16.3

17.1

Average UV index

Average cloud cover

Average visibility

Average temperature in September
Alsterbro, Sweden

Average high temperature in September: 16.8°C

The warmest month (with the highest average high temperature) is July (21.9°C).
The month with the lowest average high temperature is January (0.8°C).

Average low temperature in September: 9.7°C

The month with the highest average low temperature is July (12.8°C).
The coldest month (with the lowest average low temperature) is February (-2.3°C).

Average pressure in September
Alsterbro, Sweden

Average pressure in September: 1014.9mbar

The months with the highest atmospheric pressure are April and May (1015.4mbar).
The month with the lowest atmospheric pressure is December (1010.2mbar).

Average wind speed in September
Alsterbro, Sweden

Average wind speed in September: 13.4km/h

The windiest month (with the highest average wind speed) is December (15.2km/h).
The calmest month (with the lowest average wind speed) is August (12.1km/h).

Average humidity in September
Alsterbro, Sweden

Average humidity in September: 79%

The months with the highest relative humidity are February and November (89%).
The month with the lowest relative humidity is May (69%).

Average rainfall in September
Alsterbro, Sweden

Average rainfall in September: 16mm

The wettest month (with the highest rainfall) is July (32mm).
The driest month (with the least rainfall) is April (11mm).

Average rainfall days in September
Alsterbro, Sweden

Average rainfall days in September: 9.7 days

The month with the highest number of rainy days is July (12.8 days).
The month with the least rainy days is February (6.2 days).

Average snowfall in September
Alsterbro, Sweden

Average snowfall in September: 0mm

The month with the highest snowfall is February (94mm).
The months with the least snowfall are June, July, August and September (0mm).

Average snowfall days in September
Alsterbro, Sweden

Average snowfall days in September: 0 days

The months with the highest number of snowfall days are January and February (12.1 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in September /
Average sunshine in September
Alsterbro, Sweden

Average daylight in September: 12h and 48min

The month with the longest days is June (Average daylight: 17h and 48min).
The month with the shortest days is December (Average daylight: 6h and 54min).

Average sunshine in September: 8h and 12min

The month with the most sunshine is August (Average sunshine: 9h and 54min).
The months with the least sunshine are January and February (Average sunshine: 3h and 0min).