Weather in Rockhampton in September

Prime time. September is about as good as Rockhampton gets. Highs average 28.4 °C, lows 16 °C, and rain falls on 4 days — nothing in the month is working against you.

September ranks 5 of 12 in Rockhampton: past the worst of the year but short of August, which is the month to book if the dates are open.

Rain falls on only 4 days, so an itinerary with no wet-weather fallback is a reasonable risk. Pack for 28.4 °C days and 16 °C nights; the spread matters more here than any single number.

What the averages hide

Averages flatten a month, and this one hides a few things: 8 days top 30 °C — hot spells arrive, but they break. Across the twenty years measured, the hottest September day reached 38.8 °C and the coldest night fell to 7.3 °C, and the wettest single day dropped 41 mm — roughly 164% of the month's rain in one day.

This is the volatile part. September rainfall has ranged from 0 mm to 140 mm across the twenty years measured — a 140 mm spread around an average of 25 mm. The average is real but almost no individual September looks like it, so treat the figure as the middle of a wide range rather than a forecast.

Wind is light at 10.3 km/h, so the temperature on the page is close to the temperature on your skin, and humidity is unremarkable at 65%.

How September sits in the year

The month is on the way up: 3.1 °C warmer than August, and October adds another 2.2 °C. Late in the month feels noticeably different from the start of it, which is worth knowing if the trip is short.

Daylight in September

11.9 hours of daylight, gaining 0.7 hours across the month. That is between Rockhampton's extremes of 13.6 and 10.7 hours, so days are long enough not to constrain the plan.

Sea temperature

The sea sits at about 22.2 °C in September — comfortable for a proper swim. The sea peaks at 28 °C in February and bottoms out at 21.3 °C — water lags the air by a month or two, which is why the best swimming often comes after the best weather.

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.

September in Rockhampton versus nearby

If Rockhampton is one option among several, the nearby comparison is worth making. Bundaberg is close enough to be a coin toss — 3.7 °C cooler, 2 days more rain. Mackay is a better bet in September — 4.7 °C cooler, 1 day less rain.

So: September works, with August the better month by 8 points if the dates can move. If they cannot, nothing here should stop you booking.

Every month in Rockhampton

See all twelve months in Rockhampton, or where else to go in September.