Weather in Toowoomba in September

Prime time. If you get to pick your dates, September is the one. Highs average 24.1 °C, lows 8.8 °C, and rain falls on 5 days — nothing in the month is working against you.

September ranks 4 of 12 in Toowoomba: 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 5 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

Averages flatten a month, and this one hides a few things: the day swings 15.3 °C from low to high, which means one bag has to cover both. Across the twenty years measured, the hottest September day reached 35.8 °C and the coldest night fell to 1.1 °C, and the wettest single day dropped 34 mm — roughly 117% of the month's rain in one day.

This is the volatile part. September rainfall has ranged from 0 mm to 111 mm across the twenty years measured — a 111 mm spread around an average of 29 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 8.2 km/h, so the temperature on the page is close to the temperature on your skin, and humidity is unremarkable at 60%.

How September sits in the year

The month is on the way up: 4 °C warmer than August, and October adds another 3 °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 0.8 hours across the month. That is between Toowoomba's extremes of 13.9 and 10.4 hours, so days are long enough not to constrain the plan.

An inland climate

With no coast nearby, the year swings a fair way — 26.1 °C between the warmest afternoons and the coldest nights, wider than any coastal city at this latitude would manage. Within September itself the daily swing is 15.3 °C, so mornings and afternoons need different clothes.

How busy it gets

Peak season. Expect the highest prices of the year and to be booking well ahead. If the dates are flexible, March is the trade worth considering — 14 points weaker on weather, and materially quieter.

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

September in Toowoomba versus nearby

If Toowoomba is one option among several, the nearby comparison is worth making. Brisbane is close enough to be a coin toss — within a degree on temperature, 2 days more rain. Byron Bay is close enough to be a coin toss — 2.6 °C cooler, 2 days more rain.

So: September is effectively as good as it gets here — 1 points behind August, which is inside the margin where the weather stops being the deciding factor and price starts being it.

Every month in Toowoomba

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