September Weather forecast - Autumn forecast

Weather in September
Frequently asked questions
Average temperature in September
Average rainfall in September
Average rainfall days in September
Average sea temperature in September
Average daylight in September
Average sunshine in September
Average UV index in September

The Vigeland sculpture park in Oslo, Norway, at dusk

Weather in September

The first month of the autumn, September, is still a mild month in Oslo, Norway, with an average temperature fluctuating between 7.5°C (45.5°F) and 15.1°C (59.2°F).

Temperature

In September, the average high-temperature decreases from a pleasant 20.1°C (68.2°F) in August to a moderate 15.1°C (59.2°F). The average low-temperature, in Oslo, Norway, is 7.5°C (45.5°F).

Rainfall

September is the month with the most rainfall. Rain falls for 7 days and accumulates 90mm (3.54") of precipitation.

Sea temperature

In September, the average sea temperature is 15.4°C (59.7°F).
Note: For most, swimming in 15.4°C (59.7°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).

Daylight

In September, the average length of the day in Oslo is 12h and 52min.
On the first day of the month, sunrise is at 06:11 and sunset at 20:22. On the last day of September, in Oslo, sunrise is at 07:19 and sunset at 18:54 CEST.

Sunshine

In Oslo, the average sunshine in September is 4.8h.

UV index

In Oslo, the average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: The average daily UV index of 3 in September transform into the following instructions:
Take precautions - Protection against skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.

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FAQ

What is the temperature in September in Oslo?

In September, the average high-temperature is 15.1°C (59.2°F), and the average low-temperature is 7.5°C (45.5°F).

What is the rainiest month in Oslo?

September is the month with the most rainfall in Oslo, Norway. Rain falls for 7 days and accumulates 90mm (3.54") of precipitation.

How much does it rain in Oslo in September?

In Oslo, Norway, in September, it is raining for 7 days, with typically 90mm (3.54") of accumulated precipitation.

What is the sea temperature in September in Oslo?

In Oslo, Norway, in September, the average water temperature is 15.4°C (59.7°F). For swimming, a surface water temperature of 15.4°C (59.7°F) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 21°C (69.8°F).

How many hours of daylight does Oslo have in September?

In September, the average day length in Oslo, Norway, is 12h and 52min.

What time are sunrise and sunset in September in Oslo?

On the first day of September in Oslo, Norway, sunrise is at 06:11 and sunset at 20:22. On the last day of the month, sunrise is at 07:19 and sunset at 18:54 CEST.

How long on average sun shines in September in Oslo?

In Oslo, the average sunshine duration in September is 4.8h.

What is the UV index intensity in September in Oslo?

The average daily maximum UV index in September in Oslo, Norway, is 3. A UV Index value of 3 to 5 symbolizes a medium health risk 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

20.1°C 68.2°F

15.1°C 59.2°F

9.3°C 48.7°F

Average low temperature

Average rainfall

Average rainfall days

Average sea temperature

Average daylight

Average sunshine

Average UV index

Average temperature in September
Oslo, Norway

Average high temperature in September: 15.1°C

The warmest month (with the highest average high temperature) is July (21.5°C).
The month with the lowest average high temperature is January (-1.8°C).

Average low temperature in September: 7.5°C

The month with the highest average low temperature is July (12.2°C).
The coldest months (with the lowest average low temperature) are January and February (-6.8°C).

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Average rainfall in September
Oslo, Norway

Average rainfall in September: 90mm

The wettest month (with the highest rainfall) is September (90mm).
The driest month (with the least rainfall) is February (36mm).

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Average rainfall days in September
Oslo, Norway

Average rainfall days in September: 7 days

The months with the highest number of rainy days are August, October and November (8 days).
The month with the least rainy days is February (4 days).

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Average sea temperature in September
Oslo, Norway

Average sea temperature in September: 15.4°C

The best month for swimming (with the highest average sea temperature) is August (17.9°C).
The coldest month (with the lowest average sea temperature) is March (3°C).

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

Average daylight in September: 12h and 52min

The month with the longest days is June (Average daylight: 18h and 41min).
The month with the shortest days is December (Average daylight: 6h and 4min).

Average sunshine in September: 4h and 48min

The month with the most sunshine is June (Average sunshine: 8h and 18min).
The month with the least sunshine is December (Average sunshine: 1h and 6min).

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Average UV index in September
Oslo, Norway

Average UV index in September: 3

The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, November and December (UV index 0).

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September weather forecast
Oslo, Norway

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