Average weather for Heard Island and McDonald Islands in September
It's cold in September in Heard Island and McDonald Islands with an average temperature of 1°C. Temperatures this month range from a low of 1°C to a high of 2°C. At night, you can expect temperatures between -2°C and 0°C.
Start of September
The month of September starts in Heard Island and McDonald Islands with really cold temps, averaging around 2°C during the day and nights dipping to about 0°C. You can expect regular precipitation, but there will also be some sunny days in the early part of the month. Wear a heavy winter coat, sweater, long pants, beanie, and gloves.
Mid September
By mid-September, daytime temps stay steady at around 2°C, with nights around 0°C. There’s a chance of some showers during this time, but plenty of dry and sunny days too. Wear a heavy winter coat, sweater, long pants, beanie, and gloves.
End of September
By the end of September, the average daytime temperature in Heard Island and McDonald Islands is around 2°C, while nighttime temps are about 0°C. Expect regular precipitation, but if you’re lucky, you’ll also get some dry and sunny days. Wear a heavy winter coat, sweater, long pants, beanie, and gloves.
In September, there is an average of 114 mm of precipitation, spread over 25 days. Of the total precipitation, about 37 cm falls as snow in September. The wind speed is around 7 Bft, mostly coming from the West.
Heard Island and McDonald Islands in September |
New York | ||
|---|---|---|---|
 Average temperature |
1°C | 27°C | |
 Max. temperature |
2°C | 31°C | |
| Min. temperature |
1°C | -5°C | |
 Total precipitation |
114 mm | 57 mm | |
| Rainy days |
25 days | 9 days | |
 Total snowfall |
37 cm | 0 cm | |
| Snowy days |
17 days | 0 days | |
August
UV index
The UV index is a maximum of 6 this month. That's a moderate to high value on the intensity scale of 1 to 11. Unprotected skin can burn within 15-25 minutes.
Is September a good time to visit Heard Island and McDonald Islands?
Looking for sun? September isn’t a good month to be in Heard Island and McDonald Islands. There’s too much chance of rain this month.
Temperature records
With 6°C in 2017, Heard Island and McDonald Islands reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was -4°C in 2023. The extreme nighttime temperatures ranged from a lowest recorded value of -6°C to a highest value of 3°C.
Daily Temperature in September in Heard Island and McDonald Islands
This chart shows the average daily high and low temperatures in September for Heard Island and McDonald Islands, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in September in Heard Island and McDonald Islands
The chart below shows the average daily precipitation in September for Heard Island and McDonald Islands, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for September, you can expect about 25 days of precipitation in Heard Island and McDonald Islands.
Daily Snowfall in September in Heard Island and McDonald Islands
This chart shows the average daily snowfall in September in Heard Island and McDonald Islands, measured in centimeters. The bottom of the chart shows the days of the month. The data is based on historical measurements and gives an idea of the average snowfall in September.
Daily UV index in September in Heard Island and McDonald Islands
This chart shows the average daily UV index in September in Heard Island and McDonald Islands, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in September in Heard Island and McDonald Islands over the years
This chart shows the average temperature in September in Heard Island and McDonald Islands, measured in degrees Celsius, over the past few years.
Total precipitation in September in Heard Island and McDonald Islands over the years
This chart shows the average precipitation in September in Heard Island and McDonald Islands, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Snowfall in September in Heard Island and McDonald Islands per year
This chart shows the average snowfall in September in Heard Island and McDonald Islands, measured in centimeters, over the past few years.
Daily weather in September for Heard Island and McDonald Islands
Click on any day in September to get detailed info about the usual weather on that day in Heard Island and McDonald Islands. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in Heard Island and McDonald Islands
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Average weather in Heard Island and McDonald Islands by month
Click on a month below to see detailed weather info for Heard Island and McDonald Islands. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
Or check out the climate of Heard Island and McDonald Islands for all months at once
