September weather forecast
Snow Hill Island, Antarctica

Weather in Snow Hill Island becomes notably softer in September. The temperature, although still well into the negatives, rises from August. This drop in temperature fluctuations signals the retreat of extreme winter. Snowfall reduces considerably, as rainfall reaches one of its lowest points of the year. The extension of daylight hours certainly adds to the overall thaw as we approach October.

Temperature

The transition from August to September in Snow Hill Island sees an average high-temperature of an extremely cold -13°C (8.6°F), indicating a minor variance from the prior month. The average temperature during September nights in Snow Hill Island is registered at an arctic cold -20°C (-4°F).

Rainfall

In Snow Hill Island, Antarctica, in September, during 1 rainfall days, 5mm (0.2") of precipitation is typically accumulated. In Snow Hill Island, Antarctica, during the entire year, the rain falls for 21 days and collects up to 76mm (2.99") of precipitation.

Sea temperature

In Snow Hill Island, in September, the average water temperature is -1°C (30.2°F).
Note: In the course of swimming, this situation is life-threatening and fraught with risk. The severe cold of the water leads to immediate hyperventilation. Wearing a specialized swimsuit is critical to limit thermal injury.

Daylight

The average length of the day in September in Snow Hill Island is 11h and 31min.
On the first day of the month, sunrise is at 22:48 and sunset at 08:49 NZST. On the last day of September, sunrise is at 22:04 and sunset at 11:13 NZDT.
Note: On Sunday, 29. September 2024, at 02:00, Daylight Saving Time starts, and the time zone changes from NZST to NZDT. Daylight Saving Time lasts until Sunday, 06. April 2025, at 03:00; consequently, the time zone reverts from NZDT to NZST.

Sunshine

The average sunshine in September in Snow Hill Island is 4h.

UV index

In Snow Hill Island, the average daily maximum UV index in September is 1. A UV Index reading of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: The maximum daily UV index of 1 in September converts into the following recommendations:
Extended time in the sun generally does not harm most, but those with sensitive skin, infants, and children should always be protected. Direct Sun exposure should be minimized especially during midday when radiation is most intense. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.