September weather forecast
Den Helder, Netherlands

Weather in September

The first month of the autumn, September, is still a comfortable month in Den Helder, Netherlands, with temperature in the range of an average low of 15.1°C (59.2°F) and an average high of 17.2°C (63°F).

Temperature

In September, the average high-temperature is essentially the same as in August - a still enjoyable 17.2°C (63°F). In September, the average low-temperature is 15.1°C (59.2°F).

Humidity

September is the least humid month, with an average relative humidity of 77%.

Rainfall

In Den Helder, in September, it is raining for 16.9 days, with typically 41mm (1.61") of accumulated precipitation. In Den Helder, during the entire year, the rain falls for 186.7 days and collects up to 391mm (15.39") of precipitation.

Snowfall

In Den Helder, Netherlands, snow does not fall in April through October.

Daylight

In Den Helder, Netherlands, the average length of the day is 12.7h.

Sunshine

In September, the average sunshine is 6.8h.

UV index

In Den Helder, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to the UV radiation for the ordinary person.
Note: The average daily UV index of 4 transform into the following instructions:
Take precautions - Protection against sunburn is recommended. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the least humid month in Den Helder?

With an average relative humidity of 77%, September is the least humid month in Den Helder.

What is the average humidity in September in Den Helder?

In September, the average relative humidity in Den Helder is 77%.

How much does it rain in Den Helder in September?

In Den Helder, in September, it is raining for 16.9 days, with typically 41mm (1.61") of accumulated precipitation.

When it does not snow in Den Helder?

April through October are months without snowfall in Den Helder.

How many hours of daylight does Den Helder have in September?

In September, the average length of the day in Den Helder, Netherlands, is 12.7h.

How long on average sun shines in September in Den Helder?

In September, the average sunshine in Den Helder, Netherlands, is 6.8h.

How high is the UV index in September in Den Helder?

The average daily maximum UV index in September in Den Helder is 4. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from unprotected exposure to the UV radiation.

Average temperature in September
Den Helder, Netherlands

Average temperature in September - Den Helder, Netherlands
  • Average high temperature in September: 17.2°C

The warmest month (with the highest average high temperature) is August (18.9°C).
The month with the lowest average high temperature is February (5.7°C).

  • Average low temperature in September: 15.1°C

The month with the highest average low temperature is August (16.4°C).
The coldest month (with the lowest average low temperature) is February (3.5°C).

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Average pressure in September
Den Helder, Netherlands

Average pressure in September - Den Helder, Netherlands
  • Average pressure in September: 1016.2mbar

The month with the highest atmospheric pressure is May (1016.5mbar).
The month with the lowest atmospheric pressure is November (1010.5mbar).

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Average wind speed in September
Den Helder, Netherlands

Average wind speed in September - Den Helder, Netherlands
  • Average wind speed in September: 24.6km/h

The windiest month (with the highest average wind speed) is December (33.9km/h).
The calmest month (with the lowest average wind speed) is July (21.3km/h).

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Average humidity in September
Den Helder, Netherlands

Average humidity in September - Den Helder, Netherlands
  • Average humidity in September: 77%

The month with the highest relative humidity is June (83%).
The month with the lowest relative humidity is September (77%).

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Average rainfall in September
Den Helder, Netherlands

Average rainfall in September - Den Helder, Netherlands
  • Average rainfall in September: 41mm

The wettest month (with the highest rainfall) is October (49mm).
The driest month (with the least rainfall) is April (13mm).

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Average rainfall days in September
Den Helder, Netherlands

Average rainfall days in September - Den Helder, Netherlands
  • Average rainfall days in September: 16.9 days

The month with the highest number of rainy days is December (19.7 days).
The month with the least rainy days is April (10.8 days).

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Average snowfall in September
Den Helder, Netherlands

Average snowfall in September - Den Helder, Netherlands
  • Average snowfall in September: 0mm

The month with the highest snowfall is January (9mm).
Months with the least snowfall are April, May, June, July, August, September and October (0mm).

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Average snowfall days in September
Den Helder, Netherlands

Average snowfall days in September - Den Helder, Netherlands
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (2.5 days).
Months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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Average daylight in September /
Average sunshine in September
Den Helder, Netherlands

Average daylight in September / Average sunshine in September - Den Helder, Netherlands
  • Average daylight in September: 12.7h

The month with the longest days is June (Average daylight: 16.8h).
The month with the shortest days is December (Average daylight: 7.7h).

  • Average sunshine in September: 6.8h

The month with the most sunshine is June (Average sunshine: 10.1h).
The month with the least sunshine is December (Average sunshine: 3.4h).

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Average sunshine days in September
Den Helder, Netherlands

Average sunshine days in September - Den Helder, Netherlands
  • Average sunshine days in September: 9.2 days

The month with the most sunshine days is May (16.6 days).
The month with the least sunshine days is November (6.5 days).

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Average UV index in September
Den Helder, Netherlands

Average UV index in September - Den Helder, Netherlands
  • Average UV index in September: 4

Months with the highest UV index are June, July and August (UV index 5).
Months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in September
Den Helder, Netherlands

Average cloud cover in September - Den Helder, Netherlands
  • Average cloud cover in September: 47

The month with the most cloud cover is December (Cloud cover 67).
Months with the least cloud cover are April and August (Cloud cover 40).

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Average visibility in September
Den Helder, Netherlands

Average visibility in September - Den Helder, Netherlands
  • Average visibility in September: 10km

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

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