September weather forecast
Stromness, South Georgia and the South Sandwich Islands

Weather in September

September, the first month of the spring in Stromness, is also a subzero cold month, with temperature in the range of an average low of -3.5°C (25.7°F) and an average high of -0.4°C (31.3°F).

Temperature

In September, the average high-temperature is almost the same as in August - a still freezing cold -0.4°C (31.3°F). In Stromness, South Georgia and the South Sandwich Islands, the average low-temperature is -3.5°C (25.7°F).

Humidity

The average relative humidity in September in Stromness, South Georgia and the South Sandwich Islands, is 89%.

Rainfall

In Stromness, during September, the rain falls for 9.3 days and regularly aggregates up to 87mm (3.43") of precipitation. Throughout the year, there are 168.8 rainfall days, and 1190mm (46.85") of precipitation is accumulated.

Snowfall

January through December are months with snowfall. In Stromness, in September, snow falls for 15.4 days, with typically accumulated 305mm (12.01") of snow. In Stromness, during the entire year, snow falls for 193 days and aggregates up to 3130mm (123.23") of snow.

Daylight

In September, the average length of the day in Stromness is 11h and 42min.
On the first day of September in Stromness, sunrise is at 07:06 and sunset at 17:47. On the last day of the month, sunrise is at 05:54 and sunset at 18:38 -02.

Sunshine

In Stromness, the average sunshine in September is 4h.

UV index

January through December, with an average maximum UV index of 1, are months with the highest UV index. January through December, with an average maximum UV index of 1, are months with the lowest UV index in Stromness. A UV Index of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for ordinary individuals.
Note: The daily maximum UV index of 1 in September interpret into the following advice:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the average humidity in September in Stromness?

The average relative humidity in September is 89%.

How much does it rain in Stromness in September?

In September, in Stromness, South Georgia and the South Sandwich Islands, the rain falls for 9.3 days. Throughout September, 87mm (3.43") of precipitation is accumulated.

How many days does it snow in September in Stromness?

In Stromness, in September, during 15.4 snowfall days, 305mm (12.01") of snow is typically accumulated.

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

The average day length in September in Stromness is 11h and 42min.

What time are sunrise and sunset in September in Stromness?

On the first day of September in Stromness, sunrise is at 07:06 and sunset at 17:47. On the last day of the month, sunrise is at 05:54 and sunset at 18:38 -02.

How long on average sun shines in September in Stromness?

In September, the average sunshine duration in Stromness is 4h.

When is the highest UV index in Stromness?

January through December, with an average maximum UV index of 1, are months with the highest UV index in Stromness.

What is the month with the lowest UV index in Stromness?

The months with the lowest UV index in Stromness, South Georgia and the South Sandwich Islands, are January through December, with an average maximum UV index of 1.

How high is the UV index in September in Stromness?

The average daily maximum UV index in September is 1. A UV Index value of 2, and less, symbolizes a low health threat from exposure to Sun's UV rays.

Average temperature in September
Stromness, South Georgia and the South Sandwich Islands

Average temperature in September - Stromness, South Georgia and the South Sandwich Islands
  • Average high temperature in September: -0.4°C

The warmest month (with the highest average high temperature) is February (3.1°C).
The month with the lowest average high temperature is August (-1.6°C).

  • Average low temperature in September: -3.5°C

The month with the highest average low temperature is February (1°C).
The coldest month (with the lowest average low temperature) is August (-4.9°C).

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Average pressure in September
Stromness, South Georgia and the South Sandwich Islands

Average pressure in September - Stromness, South Georgia and the South Sandwich Islands
  • Average pressure in September: 1002.1mbar

The month with the highest atmospheric pressure is September (1002.1mbar).
The month with the lowest atmospheric pressure is December (992.9mbar).

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Average wind speed in September
Stromness, South Georgia and the South Sandwich Islands

Average wind speed in September - Stromness, South Georgia and the South Sandwich Islands
  • Average wind speed in September: 25.7km/h

The windiest month (with the highest average wind speed) is September (25.7km/h).
The calmest month (with the lowest average wind speed) is December (23.5km/h).

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Average humidity in September
Stromness, South Georgia and the South Sandwich Islands

Average humidity in September - Stromness, South Georgia and the South Sandwich Islands
  • Average humidity in September: 89%

The months with the highest relative humidity are January and February (91%).
The months with the lowest relative humidity are July and August (87%).

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Average rainfall in September
Stromness, South Georgia and the South Sandwich Islands

Average rainfall in September - Stromness, South Georgia and the South Sandwich Islands
  • Average rainfall in September: 87mm

The wettest month (with the highest rainfall) is April (114mm).
The driest month (with the least rainfall) is October (82mm).

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Average rainfall days in September
Stromness, South Georgia and the South Sandwich Islands

Average rainfall days in September - Stromness, South Georgia and the South Sandwich Islands
  • Average rainfall days in September: 9.3 days

The month with the highest number of rainy days is March (20.5 days).
The month with the least rainy days is August (7.8 days).

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Average snowfall in September
Stromness, South Georgia and the South Sandwich Islands

Average snowfall in September - Stromness, South Georgia and the South Sandwich Islands
  • Average snowfall in September: 305mm

The month with the highest snowfall is August (421mm).
The month with the least snowfall is March (125mm).

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Average snowfall days in September
Stromness, South Georgia and the South Sandwich Islands

Average snowfall days in September - Stromness, South Georgia and the South Sandwich Islands
  • Average snowfall days in September: 15.4 days

The month with the highest number of snowfall days is August (19 days).
The month with the least snowfall days is February (11.7 days).

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Average daylight in September /
Average sunshine in September
Stromness, South Georgia and the South Sandwich Islands

Average daylight in September / Average sunshine in September - Stromness, South Georgia and the South Sandwich Islands
  • Average daylight in September: 11h and 42min

The month with the longest days is December (Average daylight: 17h and 4min).
The month with the shortest days is June (Average daylight: 7h and 26min).

  • Average sunshine in September: 4h and 0min

The month with the most sunshine is October (Average sunshine: 5h and 48min).
The month with the least sunshine is August (Average sunshine: 3h and 0min).

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Average sunshine days in September
Stromness, South Georgia and the South Sandwich Islands

Average sunshine days in September - Stromness, South Georgia and the South Sandwich Islands
  • Average sunshine days in September: 4 days

The months with the most sunshine days are September and November (4 days).
The month with the least sunshine days is January (1.1 days).

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Average UV index in September
Stromness, South Georgia and the South Sandwich Islands

Average UV index in September - Stromness, South Georgia and the South Sandwich Islands
  • Average UV index in September: 1

The months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 1).
The months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 1).

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Average cloud cover in September
Stromness, South Georgia and the South Sandwich Islands

Average cloud cover in September - Stromness, South Georgia and the South Sandwich Islands
  • Average cloud cover in September: 69

The month with the most cloud cover is January (Cloud cover 73).
The month with the least cloud cover is October (Cloud cover 66).

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Average visibility in September
Stromness, South Georgia and the South Sandwich Islands

Average visibility in September - Stromness, South Georgia and the South Sandwich Islands
  • Average visibility in September: 7km

The months with the highest visibility are January, February, March, April, May, June, October, November and December (8km).
The months with the lowest visibility are July, August and September (7km).

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