September weather forecastRisøyhamn, Norway

September

Weather in September

The first month of the autumn, September, is still a cool month in Risøyhamn, Norway, with an average temperature ranging between min 9°C (48.2°F) and max 11.2°C (52.2°F).

Temperature

Risøyhamn ushers in September with an average high-temperature of a still fresh 11.2°C (52.2°F), showing a close resemblance to the previous month. Risøyhamn records a slight downturn in temperature to an average of 9°C (48.2°F) during September nights.

Humidity

In Risøyhamn, the average relative humidity in September is 79%.

Rainfall

In Risøyhamn, during September, the rain falls for 17.6 days and regularly aggregates up to 58mm (2.28") of precipitation. Throughout the year, there are 160.4 rainfall days, and 572mm (22.52") of precipitation is accumulated.

Snowfall

June through September are months without snowfall.

Daylight

In Risøyhamn, the average length of the day in September is 13h and 17min.
On the first day of the month, sunrise is at 05:21 and sunset at 20:33. On the last day of September, in Risøyhamn, sunrise is at 07:09 and sunset at 18:24 CEST.

Sunshine

The average sunshine in September in Risøyhamn is 6h.

UV index

In Risøyhamn, the average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: The UV index of 3 during September translates into the following guidance:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.

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

Frequently asked questions

The average high-temperature and low-temperature in Risøyhamn during September are 11.2°C (52.2°F) and 9°C (48.2°F) respectively.

In September, the average relative humidity is 79%.

In Risøyhamn, in September, during 17.6 rainfall days, 58mm (2.28") of precipitation is typically accumulated.

In Risøyhamn, Norway, snow does not fall in June through September.

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

In September, the average day length in Risøyhamn, Norway, is 13h and 17min.

In September, on the first day of the month, sunrise is at 05:21 and sunset at 20:33. On the last day of the month, in Risøyhamn, sunrise is at 07:09 and sunset at 18:24 CEST.

In September, the average sunshine duration is 6h.

In Risøyhamn, Norway, the average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a moderate vulnerability 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

12.5°C

11.2°C

7.1°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

20.2km/h

22.8km/h

26km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

12.7

10.8

Average UV index

Average cloud cover

Average visibility

Average temperature in September
Risøyhamn, Norway

Average high temperature in September: 11.2°C

The warmest month (with the highest average high temperature) is August (12.5°C).
The months with the lowest average high temperature are February and March (1.8°C).

Average low temperature in September: 9°C

The month with the highest average low temperature is August (10.4°C).
The coldest month (with the lowest average low temperature) is February (-0.8°C).

Average pressure in September
Risøyhamn, Norway

Average pressure in September: 1008.2mbar

The month with the highest atmospheric pressure is May (1013.7mbar).
The month with the lowest atmospheric pressure is December (1000mbar).

Average wind speed in September
Risøyhamn, Norway

Average wind speed in September: 21.1km/h

The windiest month (with the highest average wind speed) is March (29.1km/h).
The calmest month (with the lowest average wind speed) is July (18km/h).

Average humidity in September
Risøyhamn, Norway

Average humidity in September: 79%

The month with the highest relative humidity is July (83%).
The months with the lowest relative humidity are January, March and December (72%).

Average rainfall in September
Risøyhamn, Norway

Average rainfall in September: 58mm

The wettest month (with the highest rainfall) is March (60mm).
The driest month (with the least rainfall) is June (30mm).

Average rainfall days in September
Risøyhamn, Norway

Average rainfall days in September: 17.6 days

The month with the highest number of rainy days is September (17.6 days).
The month with the least rainy days is February (7 days).

Average snowfall in September
Risøyhamn, Norway

Average snowfall in September: 0mm

The month with the highest snowfall is March (114mm).
The months with the least snowfall are June, July, August and September (0mm).

Average snowfall days in September
Risøyhamn, Norway

Average snowfall days in September: 0 days

The month with the highest number of snowfall days is March (12.5 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in September: 13h and 18min

The month with the longest days is August (Average daylight: 17h and 42min).
The month with the shortest days is June (Average daylight: 0h and 0min).

Average sunshine in September: 6h and 0min

The month with the most sunshine is August (Average sunshine: 8h and 18min).
The month with the least sunshine is December (Average sunshine: 0h and 18min).