Temperatures in May
It's cold in May in Heard Island and McDonald Islands with an average temperature of 3°C. Temperatures this month range from a low of 3°C to a high of 4°C. At night, you can expect temperatures between 1°C and 2°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for Heard Island and McDonald Islands in May. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of May
The month of May starts in Heard Island and McDonald Islands with very cold temperatures, averaging around 4°C during the day and nights close to 2°C. You can expect regular precipitation, but there’s also a chance for some sunny days in the first days of the month. Wear a thick winter coat, jumper, long trousers, hat, and gloves.
Mid-May
By mid-May, the average daytime temperature stays the same at 4°C, with nights close to 2°C. During this part of the month, you can expect regular precipitation, but there’ll also be some sunny days. Wear a thick winter coat, jumper, long trousers, hat, and gloves.
End of May
By the end of May, the average daytime temperature in Heard Island and McDonald Islands will be around 4°C, with nights close to 2°C. There’s regular precipitation, but with a bit of luck, you’ll also get some dry and sunny days. Wear a thick winter coat, jumper, long trousers, hat, and gloves.
Precipitation in May
In May, there is an average of 126 mm of precipitation, spread over 25 days. Of the total precipitation, about 25 cm falls as snow in May. The wind speed is around 7 Bft, mostly coming from the West.
With an average precipitation chance of 81% this month, rainy days are almost inevitable.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in May for Heard Island and McDonald Islands. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
Heard Island and McDonald Islands in May |
UK | ||
|---|---|---|---|
 Average Temperature |
3°C | 18°C | |
 High Temp |
4°C | 21°C | |
| Low Temp |
3°C | 15°C | |
 Total Precipitation |
126 mm | 46 mm | |
| Rainy Days |
25 days | 8 days | |
 Total Snowfall |
25 cm | 0 cm | |
| Snowy Days |
12 days | 0 days | |
April
UV index
The UV index is a maximum of 3 this month. That's a moderate value on the intensity scale of 1 to 11. Unprotected skin can burn in about 30 minutes.
Is May a good time to visit Heard Island and McDonald Islands?
After some sun? Then May isn’t the best time to be in Heard Island and McDonald Islands. There’s too much chance of rain this month.
Temperature records for Heard Island and McDonald Islands in May
With 7°C, Heard Island and McDonald Islands hit the highest temperature in the last 10 years in May 2017. The lowest daytime temperature in this month was -3°C in 2022. The extreme night temperatures ranged from a low of -4°C to a high of 4°C.
Daily Temperature in May in Heard Island and McDonald Islands
This chart shows the average daily temperatures, both day and night, for each day in May in Heard Island and McDonald Islands, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in May in Heard Island and McDonald Islands
The chart below shows the average daily precipitation in May for Heard Island and McDonald Islands, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown 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 rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for May, you can expect around 25 days of rain in Heard Island and McDonald Islands.
Daily Snowfall in May in Heard Island and McDonald Islands
This chart shows the average daily snowfall in May in Heard Island and McDonald Islands, measured in centimetres. 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 May.
Daily UV Index in May in Heard Island and McDonald Islands
This chart shows the average daily UV index in May 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 May in Heard Island and McDonald Islands Over the Years
This chart shows the average temperature in May in Heard Island and McDonald Islands, measured in degrees Celsius, over the past years.
Total Precipitation in May in Heard Island and McDonald Islands Over the Years
This chart shows the average precipitation in May in Heard Island and McDonald Islands, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Snowfall in May in Heard Island and McDonald Islands per year
This chart shows the average snowfall in May in Heard Island and McDonald Islands, measured in centimetres, over the past years.
Daily climate in May for Heard Island and McDonald Islands
Click on a specific day in May for detailed info on the typical 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 May in Heard Island and McDonald Islands
Have you been to Heard Island and McDonald Islands in May?
Share your weather experience in May in Heard Island and McDonald Islands.
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
