Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
September
Weather in September
Temperature
Stromness notes an average high-temperature of a still freezing cold -0.4°C (31.3°F) in September, hardly diverging from August. The September average low temperature in Stromness, marginally lower than the daytime high, records at a still freezing cold -3.5°C (25.7°F).Humidity
The average relative humidity in September in Stromness is 89%.Rainfall
In Stromness, South Georgia and the South Sandwich Islands, during September, the rain falls for 9.3 days and regularly aggregates up to 87mm (3.43") of precipitation. Throughout the year, in Stromness, South Georgia and the South Sandwich Islands, there are 168.8 rainfall days, and 1190mm (46.85") of precipitation is accumulated.Snowfall
Months with snowfall are January through December. In Stromness, in September, during 15.4 snowfall days, 305mm (12.01") of snow is typically accumulated. Throughout the year, in Stromness, there are 193 snowfall days, and 3130mm (123.23") of snow is accumulated.Daylight
The average length of the day in September is 11h and 42min.On the first day of the month, sunrise is at 07:05 and sunset at 17:48. On the last day of September, in Stromness, sunrise is at 05:53 and sunset at 18:39 -02.
Sunshine
In September, the average sunshine 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. A UV Index estimate of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum daily UV index of 1 during September translates into the following directions:
While most can endure approximately an hour in the sun without burning, children always require protection from sunlight. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in Stromness in September?
What is the average humidity in September in Stromness?
How many days does it rain in September in Stromness?
How many days does it snow in September in Stromness?
How many hours of daylight does Stromness have in September?
When are sunrise and sunset in September in Stromness?
How many hours of sunshine does Stromness have in September?
What are the months with the highest UV index in Stromness?
When is the lowest UV index in Stromness?
How high is the UV index in September in Stromness?
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).
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).
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).
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%).
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).
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).
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).
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).
Average daylight in September /
Average sunshine in September
Stromness, South Georgia and the South Sandwich Islands
- Average daylight in September: 11h and 4min
The month with the longest days is December (Average daylight: 17h and 6min).
The month with the shortest days is June (Average daylight: 7h and 24min).
- 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).
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).
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).
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).
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).
