Weather in September
Temperature
The advent of September in McMurdo, Antarctica, sees the average high-temperature at a still life-threatening cold -20.8°C (-5.4°F), subtly shifted from August's -22.8°C (-9°F). McMurdo experiences a mean temperature of -29.4°C (-20.9°F) during September nights.Humidity
The least humid month in McMurdo is September, with an average relative humidity of 55.8%.Rainfall
In McMurdo, during September, the rain falls for 3 days and regularly aggregates up to 12mm (0.47") of precipitation. In McMurdo, during the entire year, the rain falls for 46.1 days and collects up to 201mm (7.91") of precipitation.Snowfall
Months with snowfall in McMurdo are January through December. In McMurdo, in September, during 13.3 snowfall days, 76mm (2.99") of snow is typically accumulated. In McMurdo, during the entire year, snow falls for 181.3 days and aggregates up to 1484mm (58.43") of snow.Daylight
The average length of the day in September is 10h and 42min.On the first day of the month, sunrise is at 09:19 and sunset at 16:27 NZST. On the last day of September, in McMurdo, sunrise is at 06:31 and sunset at 20:54 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.
Frequently asked questions
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How many hours of daylight does McMurdo have in September?
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When does Daylight Saving Time (DST) start in September in McMurdo?
Average temperature in September
McMurdo, Antarctica
- Average high temperature in September: -20.8°C
The warmest month (with the highest average high temperature) is January (-0.2°C).
The month with the lowest average high temperature is August (-22.8°C).
- Average low temperature in September: -29.4°C
The month with the highest average low temperature is January (-5.5°C).
The coldest month (with the lowest average low temperature) is August (-31.8°C).
Average humidity in September
McMurdo, Antarctica
- Average humidity in September: 55.8%
The month with the highest relative humidity is December (67%).
The month with the lowest relative humidity is September (55.8%).
Average rainfall in September
McMurdo, Antarctica
- Average rainfall in September: 11.8mm
The wettest month (with the highest rainfall) is June (24.9mm).
The driest month (with the least rainfall) is November (9.5mm).
Average rainfall days in September
McMurdo, Antarctica
- Average rainfall days in September: 3 days
The month with the highest number of rainy days is June (5.7 days).
The month with the least rainy days is November (2.4 days).
Average snowfall in September
McMurdo, Antarctica
- Average snowfall in September: 76mm
The month with the highest snowfall is February (224mm).
The months with the least snowfall are January and August (66mm).
Average snowfall days in September
McMurdo, Antarctica
- Average snowfall days in September: 13.3 days
The month with the highest number of snowfall days is March (17.8 days).
The month with the least snowfall days is January (12.8 days).
Average daylight in September
McMurdo, Antarctica
- Average daylight in September: 10h and 4min
The month with the longest days is March (Average daylight: 13h and 48min).
The months with the shortest days are January, May, June, July, November and December (Average daylight: 0h and 0min).
McMurdo, Antarctica
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