May weather forecast
Adelaide, Australia

May

Weather in May

As Winter approaches, May undergoes a distinctive change in weather with temperatures dropping to an average high of 17.2°C (63°F) and a plunge in sea temperatures to 18°C (64.4°F). Speckled with an increased number of rainy days, predominantly 12.9 days, the city receives 36mm (1.42") of rainfall. The wind velocity does exhibit an upward trend, enhancing the chill factor. Naturally, dressing to the season becomes essential, counting on warm clothing and raincoats. The shift from May's weather to June’s is relatively less drastic but has tangible variations.

Temperature

May is marked by a subtle drop in average high-temperatures, transitioning from an agreeable 20.8°C (69.4°F) in April to a refreshing 17.2°C (63°F). Adelaide in May observes a slight diminution in temperature from daily highs, recording a low-temperature average of 12.3°C (54.1°F).

Humidity

In Adelaide, Australia, the average relative humidity in May is 70%.

Rainfall

In Adelaide, in May, it is raining for 12.9 days, with typically 36mm (1.42") of accumulated precipitation. Throughout the year, there are 126.2 rainfall days, and 326mm (12.83") of precipitation is accumulated.

Sea temperature

In Adelaide, in May, the average water temperature is 18°C (64.4°F).
Note: For most individuals, swimming in 18°C (64.4°F) is not enjoyable. As the water temperature decreases from 21°C (69.8°F) to 15°C (59°F), breathing control becomes increasingly difficult.

Daylight

The average length of the day in May is 10h and 19min.
On the first day of May in Adelaide, sunrise is at 6:52 am and sunset at 5:33 pm. On the last day of the month, sunrise is at 7:14 am and sunset at 5:12 pm ACST.

Sunshine

In May, the average sunshine is 7.2h.

UV index

The average daily maximum UV index in May is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for average individuals.
Note: The maximum UV index of 4 during May leads to these instructions:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.

Frequently asked questions

What is the usual temperature for Adelaide in May?
The high-temperature, in May, in Adelaide, is 17.2°C (63°F), while the low-temperature averages to 12.3°C (54.1°F).
What is the average humidity in May in Adelaide?
The average relative humidity in May is 70%.
How much does it rain in Adelaide in May?
In May, in Adelaide, Australia, the rain falls for 12.9 days. Throughout May, 36mm (1.42") of precipitation is accumulated.
What is the sea temperature in May in Adelaide?
In May, the average sea temperature in Adelaide, Australia, is 18°C (64.4°F). For swimming, a surface water temperature of 18°C (64.4°F) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 21°C (69.8°F).
How many hours of daylight does Adelaide have in May?
In Adelaide, Australia, the average day length in May is 10h and 19min.
What time are sunrise and sunset in May in Adelaide?
In May, on the first day of the month, sunrise is at 6:52 am and sunset at 5:33 pm. On the last day of the month, in Adelaide, Australia, sunrise is at 7:14 am and sunset at 5:12 pm ACST.
How many hours of sunshine does Adelaide have in May?
In Adelaide, the average sunshine duration in May is 7.2h.
How high is the UV index in May in Adelaide?
In May, the average daily maximum UV index in Adelaide, Australia, is 4. A UV Index reading of 3 to 5 represents a moderate vulnerability from unprotected exposure to UV radiation.
Average high temperature
Average low temperature
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average sea temperature
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility
Average temperature in May - Adelaide, Australia
Average temperature in May
Adelaide, Australia
  • Average high temperature in May: 17.2°C

The warmest month (with the highest average high temperature) is January (26.3°C).
The month with the lowest average high temperature is July (13.9°C).

  • Average low temperature in May: 12.3°C

The month with the highest average low temperature is January (17.8°C).
The coldest month (with the lowest average low temperature) is August (9.1°C).

Average pressure in May - Adelaide, Australia
Average pressure in May
Adelaide, Australia
  • Average pressure in May: 1020.8mbar

The month with the highest atmospheric pressure is June (1021.8mbar).
The month with the lowest atmospheric pressure is January (1012.4mbar).

Average wind speed in May - Adelaide, Australia
Average wind speed in May
Adelaide, Australia
  • Average wind speed in May: 14km/h

The windiest month (with the highest average wind speed) is August (16.3km/h).
The calmest month (with the lowest average wind speed) is April (12.9km/h).

Average humidity in May - Adelaide, Australia
Average humidity in May
Adelaide, Australia
  • Average humidity in May: 70%

The months with the highest relative humidity are June and July (74%).
The month with the lowest relative humidity is January (58%).

Average rainfall in May - Adelaide, Australia
Average rainfall in May
Adelaide, Australia
  • Average rainfall in May: 36mm

The wettest month (with the highest rainfall) is August (43mm).
The driest month (with the least rainfall) is March (16mm).

Average rainfall days in May - Adelaide, Australia
Average rainfall days in May
Adelaide, Australia
  • Average rainfall days in May: 12.9 days

The month with the highest number of rainy days is July (15.2 days).
The month with the least rainy days is February (6.2 days).

Average sea temperature in May - Adelaide, Australia
Average sea temperature in May
Adelaide, Australia
  • Average sea temperature in May: 18°C

The best month for swimming (with the highest average sea temperature) is February (20°C).
The coldest months (with the lowest average sea temperature) are August, September and October (15°C).

Average daylight in May / Average sunshine in May - Adelaide, Australia
Average daylight in May /
Average sunshine in May
Adelaide, Australia
  • Average daylight in May: 10h and 2min

The month with the longest days is December (Average daylight: 14h and 30min).
The month with the shortest days is June (Average daylight: 9h and 48min).

  • Average sunshine in May: 7h and 1min

The month with the most sunshine is December (Average sunshine: 10h and 6min).
The month with the least sunshine is August (Average sunshine: 7h and 6min).

Average sunshine days in May - Adelaide, Australia
Average sunshine days in May
Adelaide, Australia
  • Average sunshine days in May: 14.5 days

The month with the most sunshine days is January (21.9 days).
The month with the least sunshine days is August (12.7 days).

Average UV index in May - Adelaide, Australia
Average UV index in May
Adelaide, Australia
  • Average UV index in May: 4

The months with the highest UV index are February and December (UV index 6).
The month with the lowest UV index is June (UV index 3).

Average cloud cover in May - Adelaide, Australia
Average cloud cover in May
Adelaide, Australia
  • Average cloud cover in May: 40

The month with the most cloud cover is July (Cloud cover 41).
The month with the least cloud cover is January (Cloud cover 20).

Average visibility in May - Adelaide, Australia
Average visibility in May
Adelaide, Australia
  • Average visibility in May: 10km

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).

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