September weather forecast and climate
Holmsund, Sweden

September, the first month of the autumn, in Holmsund, is still a mild month, with average temperature ranging between min 8.4°C (47.1°F) and max 13.3°C (55.9°F).

Temperature

In Holmsund, the average high-temperature in September slightly decreases, from an enjoyable 17.4°C (63.3°F) in August, to a moderate 13.3°C (55.9°F). The average low-temperature, in Holmsund, is 8.4°C (47.1°F).

Humidity

The average relative humidity in September is 80%.

Rainfall

In Holmsund, during 13.7 rainfall days, 33mm (1.3") of precipitation is typically accumulated. Throughout the year, there are 126.6 rainfall days, and 418mm (16.46") of precipitation is accumulated.

Snowfall

June through September are months without snowfall.

Sea temperature

In September, the average sea temperature is 13.2°C (55.8°F).
Note: Swimming in 13.2°C (55.8°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation.

Daylight

In Holmsund, Sweden, the average length of the day is 13h.

Sunshine

In Holmsund, Sweden, the average sunshine in September is 7.7h.

UV index

In September, the average daily maximum UV index is 3. A UV Index of 3 to 5 symbolizes a medium vulnerability from the exposure to the Sun's UV radiation for ordinary individuals.
Note: The average daily UV index of 3 transform into the following instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.

What is the temperature in September in Holmsund?

In Holmsund, Sweden, in September, the average high-temperature is 13.3°C (55.9°F), and the average low-temperature is 8.4°C (47.1°F).

What is the average humidity in September in Holmsund?

In Holmsund, the average relative humidity in September is 80%.

How much does it rain in Holmsund in September?

In Holmsund, in September, during 13.7 rainfall days, 33mm (1.3") of precipitation is typically accumulated.

Does it snow in Holmsund in September?

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

When it does not snow in Holmsund?

June through September are months without snowfall in Holmsund, Sweden.

How cold is the water in September in Holmsund?

In Holmsund, the average seawater temperature in September is 13.2°C (55.8°F). At temperatures below 10°C (50°F), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 13°C (55.4°F) is not comfortable.

What is the average length of the day in September in Holmsund?

In September, the average length of the day in Holmsund is 13h.

How many hours of sunshine does Holmsund have in September?

In Holmsund, Sweden, the average sunshine in September is 7.7h.

How high is the UV index in September in Holmsund?

In September, the average daily maximum UV index in Holmsund is 3. A UV Index value of 3 to 5 symbolizes a medium health risk from the exposure to the Sun's UV rays.
Average temperature in September - Holmsund, Sweden
  • Average high temperature in September: 13.3°C

The warmest month (with the highest average high temperature) is July (18.4°C).
Months with the lowest average high temperature are January and February (-3.5°C).

  • Average low temperature in September: 8.4°C

The month with the highest average low temperature is July (12.4°C).
The coldest month (with the lowest average low temperature) is February (-7.6°C).

Average pressure in September - Holmsund, Sweden
  • Average pressure in September: 1011.5mbar

The month with the highest atmospheric pressure is May (1014.2mbar).
The month with the lowest atmospheric pressure is December (1005.3mbar).

Average wind speed in September - Holmsund, Sweden
  • Average wind speed in September: 14.9km/h

The windiest month (with the highest average wind speed) is December (17.8km/h).
The calmest month (with the lowest average wind speed) is July (13km/h).

Average humidity in September - Holmsund, Sweden
  • Average humidity in September: 80%

The month with the highest relative humidity is February (91%).
The month with the lowest relative humidity is June (70%).

Average rainfall in September - Holmsund, Sweden
  • Average rainfall in September: 33mm

The wettest month (with the highest rainfall) is December (46mm).
The driest month (with the least rainfall) is April (22mm).

Average rainfall days in September - Holmsund, Sweden
  • Average rainfall days in September: 13.7 days

Months with the highest number of rainy days are July and August (14 days).
The month with the least rainy days is February (4.2 days).

Average snowfall in September - Holmsund, Sweden
  • Average snowfall in September: 0mm

The month with the highest snowfall is March (199mm).
Months with the least snowfall are June, July, August and September (0mm).

Average snowfall days in September - Holmsund, Sweden
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (17.4 days).
Months with the least snowfall days are June, July, August and September (0 days).

Average sea temperature in September - Holmsund, Sweden
  • Average sea temperature in September: 13.2°C

The best month for swimming (with the highest average sea temperature) is August (16.8°C).
The coldest months (with the lowest average sea temperature) are February and March (-0.2°C).

Average daylight in September / Average sunshine in September - Holmsund, Sweden
  • Average daylight in September: 13h

The month with the longest days is June (Average daylight: 20.6h).
The month with the shortest days is December (Average daylight: 4.6h).

  • Average sunshine in September: 7.7h

The month with the most sunshine is June (Average sunshine: 13h).
The month with the least sunshine is December (Average sunshine: 1.5h).

Average sunshine days in September - Holmsund, Sweden
  • Average sunshine days in September: 13.6 days

The month with the most sunshine days is June (15.7 days).
The month with the least sunshine days is November (10.1 days).

Average UV index in September - Holmsund, Sweden
  • Average UV index in September: 3

The month with the highest UV index is July (UV index 5).
Months with the lowest UV index are January, February, November and December (UV index 1).

Average cloud cover in September - Holmsund, Sweden
  • Average cloud cover in September: 45

The month with the most cloud cover is January (Cloud cover 66).
Months with the least cloud cover are July and August (Cloud cover 38).

Average visibility in September - Holmsund, Sweden
  • Average visibility in September: 9km

Months with the highest visibility are June, July and August (10km).
Months with the lowest visibility are January, February and March (8km).