Weather in Adelaide in August

A good month. August works. It is not the peak, but nothing about it fights you. Highs average 15.8 °C, lows 7.3 °C, and rain falls on 11 days — nothing in the month is working against you.

August ranks 10 of 12 — near the bottom of Adelaide's year. March is the month that works, and the swing between the two is 32 points, which is a different holiday rather than a slightly better one. Worth keeping in perspective: August is the weakest month of Adelaide's year and it is still a perfectly good one. The downside here is small.

Rain on 11 days, 1 of them heavy. Enough to need a plan B, not enough to need a plan around it. Pack for 15.8 °C days and 7.3 °C nights; the spread matters more here than any single number.

What the averages hide

The averages here are honest — no hidden extremes worth planning around. Across the twenty years measured, the hottest August day reached 26.3 °C and the coldest night fell to 1.4 °C.

August is moderately variable: 11 mm in the driest year against 89 mm in the wettest, around an average of 51 mm. Roughly two Augusts in three land near that average, and the third does something else entirely.

Wind is light at 9.3 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 76%, high enough to notice on the warm days without dominating them.

How August sits in the year

Temperatures hold steady either side: 14.8 °C in July, 15.8 here, 18.6 in September. Nothing about the timing within the month matters much.

Daylight in August

10.8 hours of daylight, gaining 0.9 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

Off season. The genuine off season: cheapest by a distance, with the caveat that some tours and restaurants close entirely.

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

August 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, the same number of rain days. Whyalla is a better bet in August — 2 °C warmer, 4 days less rain.

So: August is a compromise. March is 25 points better and is what Adelaide is actually like at its best — worth moving the trip for if that is possible, and worth adjusting expectations for if it is not.

Every month in Adelaide

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