September weather forecastStavanger, Norway

September

Weather in September

September in Stavanger signifies the beginning of autumn, contrasting the warmth of August with a cool breeze. The downward trend in daylight hours continues, but there is still enough time for individuals to indulge in outdoor activities. Sea temperatures start to cool, suggesting the impending arrival of winter. Despite the seasonal change, rainfall and humidity keep a steady rate, maintaining the damp characteristic of the city. The month distinguishes itself with a slight drop in average temperatures, fluctuating from 12.2°C (54°F) to 14.4°C (57.9°F).

Temperature

The weather during September records an average high-temperature of a still refreshing 14.4°C (57.9°F), closely mirroring the preceding month. Stavanger's September nights observe a minor shift from the daytime temperatures, resulting in an average dip to a cool 12.2°C (54°F).

Humidity

The average relative humidity in September in Stavanger is 79%.

Rainfall

In September, the rain falls for 19.1 days. Throughout September, 101mm (3.98") of precipitation is accumulated. In Stavanger, Norway, during the entire year, the rain falls for 210.4 days and collects up to 1002mm (39.45") of precipitation.

Snowfall

May through October are months without snowfall in Stavanger.

Sea temperature

In Stavanger, the average seawater temperature in September is 15.2°C (59.4°F).
Note: For most, swimming in 15.2°C (59.4°F) is not a pleasant experience. As the temperature falls from 21°C (69.8°F) to 15°C (59°F), controlling one's breathing becomes more difficult.

Daylight

In Stavanger, the average length of the day in September is 12h and 50min.
On the first day of the month, sunrise is at 06:36 and sunset at 20:37. On the last day of September, in Stavanger, sunrise is at 07:40 and sunset at 19:12 CEST.

Sunshine

The average sunshine in September in Stavanger is 6.8h.

UV index

The average daily maximum UV index in September in Stavanger is 3. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: A maximum UV index of 3 in September translates into the following recommendations:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.

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

Frequently asked questions

The high-temperature during September is 14.4°C (57.9°F) and the low-temperature is 12.2°C (54°F).

The average relative humidity in September in Stavanger, Norway, is 79%.

In September, in Stavanger, Norway, the rain falls for 19.1 days. Throughout September, 101mm (3.98") of precipitation is accumulated.

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

In Stavanger, in September, the average water temperature is 15.2°C (59.4°F). For most, swimming in 15.2°C (59.4°F) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 21°C (69.8°F) to 15°C (59°F).

In September, the average day length in Stavanger is 12h and 50min.

On the first day of September in Stavanger, sunrise is at 06:36 and sunset at 20:37. On the last day of the month, sunrise is at 07:40 and sunset at 19:12 CEST.

The average sunshine duration in September is 6.8h.

The average daily maximum UV index in September in Stavanger, Norway, is 3. A UV Index estimate of 3 to 5 represents a moderate health threat from 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

16.3°C

14.4°C

10.9°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

19.6km/h

21.5km/h

24.8km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

19.1

20.6

Average snowfall

0mm

Average snowfall days

0.2

Average sea temperature

Average daylight

Average sunshine

Average sunshine days

8.8

9.4

8.3

Average UV index

Average cloud cover

Average visibility

Average temperature in September
Stavanger, Norway

Average high temperature in September: 14.4°C

The warmest month (with the highest average high temperature) is August (16.3°C).
The month with the lowest average high temperature is February (3.7°C).

Average low temperature in September: 12.2°C

The month with the highest average low temperature is August (14°C).
The coldest month (with the lowest average low temperature) is February (1.6°C).

Average pressure in September
Stavanger, Norway

Average pressure in September: 1012.6mbar

The month with the highest atmospheric pressure is May (1015mbar).
The month with the lowest atmospheric pressure is December (1006.7mbar).

Average wind speed in September
Stavanger, Norway

Average wind speed in September: 20.7km/h

The windiest month (with the highest average wind speed) is January (27.4km/h).
The calmest months (with the lowest average wind speed) are June and July (17.2km/h).

Average humidity in September
Stavanger, Norway

Average humidity in September: 79%

The month with the highest relative humidity is July (81%).
The months with the lowest relative humidity are October and November (76%).

Average rainfall in September
Stavanger, Norway

Average rainfall in September: 101mm

The wettest month (with the highest rainfall) is December (130mm).
The driest month (with the least rainfall) is June (43mm).

Average rainfall days in September
Stavanger, Norway

Average rainfall days in September: 19.1 days

The month with the highest number of rainy days is December (21.5 days).
The month with the least rainy days is June (13.3 days).

Average snowfall in September
Stavanger, Norway

Average snowfall in September: 0mm

The month with the highest snowfall is March (30mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).

Average snowfall days in September
Stavanger, Norway

Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (4.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average sea temperature in September
Stavanger, Norway

Average sea temperature in September: 15.2°C

The best month for swimming (with the highest average sea temperature) is August (16.8°C).
The coldest month (with the lowest average sea temperature) is March (4.6°C).

Average daylight in September /
Average sunshine in September
Stavanger, Norway

Average daylight in September: 12h and 48min

The month with the longest days is June (Average daylight: 18h and 24min).
The month with the shortest days is December (Average daylight: 6h and 18min).

Average sunshine in September: 6h and 48min

The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is December (Average sunshine: 2h and 30min).

Average sunshine days in September
Stavanger, Norway

Average sunshine days in September: 9.4 days

The month with the most sunshine days is June (14.4 days).
The month with the least sunshine days is December (5.8 days).

Average UV index in September
Stavanger, Norway

Average UV index in September: 3

The months with the highest UV index are May, June, July and August (UV index 4).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

Average cloud cover in September
Stavanger, Norway

Average cloud cover in September: 52

The month with the most cloud cover is December (Cloud cover 64).
The month with the least cloud cover is May (Cloud cover 44).

Average visibility in September
Stavanger, Norway

Average visibility in September: 10km

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