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March is autumn on the calendar in Canberra and summer in practice for the first half of it - regulars describe 30-plus days running until late March, against our row's 25.9C average high. The reason people ask about this month is the leaves, and the answer is consistently no: Canberra's European street trees do not turn until April, late April being the month named, and early March will not cut it. Late March is a lottery. What March does give is the daily swing of a high inland city - our row's 10.4C night under that 25.9C day - and low humidity. The autumn regulars actually recommend is high teens and low twenties, which is April and May. The record: 5.2 precipitation days carrying 51.6mm, 9.5 hours of sun and AQI 24.

Regulars are consistent that spring here means genuine day-to-day whiplash - shorts and t-shirt weather one day, long sleeves the very next - and that frost risk can still linger into this month even as days properly warm up. Our row backs that mild, still-changeable read, 21.6C over 5.5C nights feeling 3C, with 49.3mm of rain across 5.7 days. Regulars also flag spring as genuinely the windiest stretch of the year here, worth factoring into any outdoor plans around the lake or Parliament House lawns. Layers that can be added or shed through the day remain the standard packing advice regardless of which week you land. The record: humidity 72 percent, 10.1 hours of sun, an 18.8 kph wind and one of the cleanest air readings in this project, AQI 26.

December is summer here and the boards describe it as hot but dry - no humidity to speak of, more like a continental plain than a coast, with storms possible and nothing guaranteed. Our row carries the signature: 28C by day and 11.2C at night, a seventeen-degree gap, on 65 percent humidity and a dew point of 10.4C. That spread is the thing to pack for, because an evening outdoors at 580m is not a summer evening anywhere else in Australia. Rain is light at 49.7mm across 5.8 days and the sun runs 12 hours inside 14.5 of daylight. The spring flower festival belongs to October, not now. The record: an 18.6 kph wind and AQI 28.

Anyone booking November for the flowers has missed them: Floriade runs to about the middle of October, so this is the month after. What November is instead is the end of spring turning into summer, warm by day and still cool at night - our row gives 24.7C falling to 8.8C, a sixteen-degree gap that catches visitors out. The city sits close to the snowfields, and a late-season storm off them brings cold air through without bringing snow to the city itself. Rain is modest at 70.9mm across 5.9 days, with 11 hours of sun inside 14. The record: humidity 68 percent, a 19.2 kph wind and AQI 29.

Canberra forum threads describe January as consistently hot, with posters citing temperatures commonly reaching 40C or higher and a stretch of 30-plus-degree days running from late December through to late March. The heat was repeatedly described as dry rather than humid, given Canberra's inland setting, which posters said makes it feel more tolerable than a similarly hot coastal city, though the intense UV and real sunburn risk were flagged as a genuine concern. Posters noted the surrounding region is largely national park, making it a strong base for hiking despite the heat, provided outings are planned around the cooler morning and evening hours rather than the midday peak.