Weather in Adelaide in April

Prime time. April is about as good as Adelaide gets. Highs average 23.4 °C, lows 12.7 °C, and rain falls on 6 days — nothing in the month is working against you.

April ranks 5 of 12 in Adelaide: past the worst of the year but short of March, which is the month to book if the dates are open.

Rain falls on only 6 days, so an itinerary with no wet-weather fallback is a reasonable risk. Nothing specialised needed — this is the month you pack for the trip rather than for the weather.

What the averages hide

The averages here are honest — no hidden extremes worth planning around. Across the twenty years measured, the hottest April day reached 36.1 °C and the coldest night fell to 5.7 °C, and the wettest single day dropped 35 mm — roughly 103% of the month's rain in one day.

April is moderately variable: 4 mm in the driest year against 93 mm in the wettest, around an average of 34 mm. Roughly two Aprils in three land near that average, and the third does something else entirely.

Wind is light at 9 km/h, so the temperature on the page is close to the temperature on your skin, and humidity is unremarkable at 63%.

How April sits in the year

The month is on the way down: 3.8 °C cooler than March, with May dropping another 4.6 °C. The first week and the last are not the same trip.

Daylight in April

11.2 hours of daylight, losing 1 hours across the month. That is between Adelaide's extremes of 14.5 and 9.8 hours, so days are long enough not to constrain the plan.

An inland climate

Despite being inland, the year stays fairly even: 23.5 °C between the year's warmest afternoons and coldest nights.

How busy it gets

Busy. Popular without being frantic; book the things you care about, improvise the rest.

Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.

April in Adelaide versus nearby

If Adelaide is one option among several, the nearby comparison is worth making. Gawler is close enough to be a coin toss — within a degree on temperature, 1 day less rain. Whyalla is close enough to be a coin toss — within a degree on temperature, 2 days less rain.

So: April is effectively as good as it gets here — 4 points behind March, which is inside the margin where the weather stops being the deciding factor and price starts being it.

Every month in Adelaide

See all twelve months in Adelaide, or where else to go in April.