Weather in September
September signals a transition from summer to autumn in Ísafjörður. The temperature starts its descent, signifying the coming of cooler season. There is a rise in rainfall to 84mm (3.31") on average, as well as a decline in daylight hours to 13.1 hours. Compared to August, the sea temperature also starts to fall, marking the end of the summer warmth. Yet, the splendid colors of autumn combined with the still mild weather keeps Ísafjörður notable.
Note: It is advised against swimming in 7.4°C (45.3°F) when it drops below 10°C (50°F). Such temperatures can cause extreme cold shock, leading to hyperventilation.
On the first day of the month, sunrise is at 06:10 and sunset at 20:55. On the last day of September, sunrise is at 07:42 and sunset at 19:02 GMT.
[Resources]Temperature
September welcomes an average high-temperature of a chilly 9°C (48.2°F), not much different from the preceding month. Ísafjörður maintains a consistent average nighttime low-temperature of 4.5°C (40.1°F) throughout September.Rainfall
During September, Ísafjörður regularly aggregates up to 84mm (3.31") of precipitation. During the entire year, Ísafjörður aggregates up to 997mm (39.25") of precipitation.Sea temperature
In September, the average sea temperature in Ísafjörður is 7.4°C (45.3°F).Note: It is advised against swimming in 7.4°C (45.3°F) when it drops below 10°C (50°F). Such temperatures can cause extreme cold shock, leading to hyperventilation.
Daylight
The average length of the day in September in Ísafjörður is 13h and 6min.On the first day of the month, sunrise is at 06:10 and sunset at 20:55. On the last day of September, sunrise is at 07:42 and sunset at 19:02 GMT.
Frequently asked questions
What is the usual temperature for Ísafjörður in September?
The high-temperature in Ísafjörður during September is 9°C (48.2°F) and the low-temperature is 4.5°C (40.1°F).
How much does it rain in Ísafjörður in September?
During September, Ísafjörður regularly aggregates up to 84mm (3.31") of precipitation.
What is the sea water temperature in September in Ísafjörður?
In Ísafjörður, the average seawater temperature in September is 7.4°C (45.3°F). Swimming in 7.4°C (45.3°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation.
What is the average length of the day in September in Ísafjörður?
In September, the average day length in Ísafjörður is 13h and 6min.
When is the sunrise / sunset in September in Ísafjörður?
On the first day of September, sunrise is at 06:10 and sunset at 20:55. On the last day of the month, sunrise is at 07:42 and sunset at 19:02 GMT.
Average temperature in September
Ísafjörður, Iceland
- Average high temperature in September: 9°C
The warmest month (with the highest average high temperature) is July (12.3°C).
The month with the lowest average high temperature is January (1.3°C).
- Average low temperature in September: 4.5°C
The month with the highest average low temperature is July (7.1°C).
The coldest month (with the lowest average low temperature) is January (-4°C).
Average rainfall in September
Ísafjörður, Iceland
- Average rainfall in September: 84mm
The wettest month (with the highest rainfall) is October (122mm).
The driest month (with the least rainfall) is July (55mm).
Average sea temperature in September
Ísafjörður, Iceland
- Average sea temperature in September: 7.4°C
The best month for swimming (with the highest average sea temperature) is July (8.7°C).
The coldest month (with the lowest average sea temperature) is March (2.7°C).
Average daylight in September
Ísafjörður, Iceland
- Average daylight in September: 13h and 1min
The month with the longest days is July (Average daylight: 21h and 0min).
The month with the shortest days is December (Average daylight: 3h and 6min).
Ísafjörður, Iceland
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