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 sea temperature 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
Transitioning from August to September, Grytviken observes an average high-temperature of a still freezing cold -0.4°C (31.3°F), differing subtly from the previous month. Grytviken experiences a steady nighttime temperature of -3.5°C (25.7°F) throughout the month of September.Humidity
In September, the average relative humidity is 89%.Rainfall
In Grytviken, in September, it is raining for 9.3 days, with typically 87mm (3.43") of accumulated precipitation. In Grytviken, during the entire year, the rain falls for 168.8 days and collects up to 1190mm (46.85") of precipitation.Snowfall
Months with snowfall are January through December. In Grytviken, in September, snow falls for 15.4 days, with typically accumulated 305mm (12.01") of snow. In Grytviken, during the entire year, snow falls for 193 days and aggregates up to 3130mm (123.23") of snow.Sea temperature
The months with the coldest seawater are August through October, with an average sea temperature of 0°C (32°F).Note: During swimming activities, this is a serious life-threatening hazard. Rapid loss of control over breathing impairs cognitive abilities. A specialized swimsuit is essential to limit thermal wastage.
Daylight
The average length of the day in September is 11h and 42min.On the first day of the month, sunrise is at 07:04 and sunset at 17:47. On the last day of September, sunrise is at 05:52 and sunset at 18:39 -02.
Sunshine
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. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for the ordinary person.Note: The daily high UV index of 1 during September translates into the following recommendations:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is September?
What is the average humidity in September?
How many days does it rain in September?
How much does it snow in September?
What are the months with the coldest sea water?
How cold is the water in September?
How many hours of daylight does Grytviken have in September?
When are sunrise and sunset in September?
How many hours of sunshine does Grytviken have in September?
What is the month with the highest UV index?
What are the months with the lowest UV index?
What is the UV index reading in September?
Average temperature in September
Grytviken, 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
Grytviken, 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
Grytviken, 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
Grytviken, 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
Grytviken, 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
Grytviken, 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
Grytviken, 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
Grytviken, 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 sea temperature in September
Grytviken, South Georgia and the South Sandwich Islands
- Average sea temperature in September: 0°C
The best months for swimming (with the highest average sea temperature) are January, February, March and April (3°C).
The coldest months (with the lowest average sea temperature) are August, September and October (0°C).
Average daylight in September /
Average sunshine in September
Grytviken, 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
Grytviken, 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
Grytviken, 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
Grytviken, 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
Grytviken, 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).
