Weather in Katoomba in May

A good month. May is a solid month to be in Katoomba. Highs sit at 14.2 °C and the day is short; this is an indoors-with-excursions month, not an outdoors-all-day one.

May ranks 9 of 12 in Katoomba: past the worst of the year but short of October, 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. Layers, and a genuinely waterproof outer — at 14.2 °C the difference between a good day and a miserable one is entirely down to what you are wearing.

What the averages hide

The averages here are honest — no hidden extremes worth planning around. Across the twenty years measured, the hottest May day reached 22.9 °C and the coldest night fell to -2.7 °C, and the wettest single day dropped 37 mm — roughly 112% of the month's rain in one day.

May is moderately variable: 7 mm in the driest year against 72 mm in the wettest, around an average of 33 mm. Roughly two Mays in three land near that average, and the third does something else entirely.

Wind is light at 1.5 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 76%, which at 14.2 °C means damp rather than muggy — the kind of cold that gets into a coat and stays there.

How May sits in the year

The month is on the way down: 4.4 °C cooler than April, with June dropping another 3.4 °C. The first week and the last are not the same trip.

Daylight in May

May sits at the dark end of Katoomba's year — 10.4 hours of daylight against 14.4 at midsummer, losing 0.7 hours across the month. Sightseeing days are genuinely shorter, and an itinerary built for summer will not fit.

An inland climate

With no coast nearby, the year swings a fair way — 26.3 °C between the warmest afternoons and the coldest nights, wider than any coastal city at this latitude would manage. At 991 m the air is thin enough to matter — sun that burns faster than the temperature suggests, and nights that cool off quickly.

How busy it gets

Shoulder. The value months — prices ease off and you get the place closer to itself. May is the value pick for Katoomba: it scores within 12 points of October without carrying October's prices.

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

May in Katoomba versus nearby

If Katoomba is one option among several, the nearby comparison is worth making. Bathurst is close enough to be a coin toss — within a degree on temperature, 1 day less rain. Sydney is a better bet in May — 5.2 °C warmer, 2 days more rain.

So: May works, with October the better month by 12 points if the dates can move. If they cannot, nothing here should stop you booking.

Every month in Katoomba

See all twelve months in Katoomba, or where else to go in May.