Weather in Kalgoorlie in January

A hard month. January asks something of you. Go in knowing what. Daytime highs average 36.4 °C and the afternoon is not negotiable — outdoor plans move to early morning or evening.

January ranks 10 of 12 — near the bottom of Kalgoorlie's year. May is the month that works, and the swing between the two is 47 points, which is a different holiday rather than a slightly better one.

Rain falls on only 5 days, so an itinerary with no wet-weather fallback is a reasonable risk. Pack for heat management rather than style: shade, water, and a schedule that gives up on the middle of the day.

What the averages hide

Averages flatten a month, and this one hides a few things: 19 days clear 35 °C, so a serious heatwave is normal rather than notable; the day swings 17.8 °C from low to high, which means one bag has to cover both. Across the twenty years measured, the hottest January day reached 47.4 °C and the coldest night fell to 10 °C, and the wettest single day dropped 84 mm — roughly 179% of the month's rain in one day.

This is the volatile part. January rainfall has ranged from 1 mm to 169 mm across the twenty years measured — a 168 mm spread around an average of 47 mm. The average is real but almost no individual January looks like it, so treat the figure as the middle of a wide range rather than a forecast.

Wind is light at 14.6 km/h, so the temperature on the page is close to the temperature on your skin, and the air is dry at 37% humidity, which makes the heat far more bearable than the same figure somewhere humid — and dehydrates you faster than you expect.

How January sits in the year

This is a turning point in the year — December and February sit on opposite sides of it, so the month contains the change rather than following it.

Daylight in January

January is at or near the longest days of Kalgoorlie's year: 13.9 hours of daylight, losing 0.5 hours across the month. Evenings are the real gain — dinner outdoors still happens in full light.

An inland climate

With no coast nearby, the year swings a fair way — 31.4 °C between the warmest afternoons and the coldest nights, wider than any coastal city at this latitude would manage. Within January itself the daily swing is 17.8 °C, so mornings and afternoons need different clothes.

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.

January in Kalgoorlie versus nearby

If Kalgoorlie is one option among several, the nearby comparison is worth making. Perth is a better bet in January — 10 °C cooler, 3 days less rain. Albany is a better bet in January — 14.2 °C cooler, the same number of rain days.

So: January is a compromise. May is 47 points better and is what Kalgoorlie 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 Kalgoorlie

See all twelve months in Kalgoorlie, or where else to go in January.