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Live forecasts update automatically; written guidance last reviewed 23 June 2026 by the Australian News Desk Weather Desk. Data from the Bureau of Meteorology (BOM) and other national met services via Open-Meteo.
Phoenix weather is defined by extreme summer heat and mild winters, with over 300 days of sunshine annually. As shown in the live forecast above, daytime temperatures regularly exceed 40°C from June to September, making it one of the hottest cities in the United States.
What is Phoenix weather like year round?
Phoenix experiences a hot desert climate (Köppen: BWh) with two distinct seasons. Summers are scorching and dry, with average highs of 41°C in July. Winters are short and pleasant, with December highs around 19°C. The city receives less than 200 millimetres of rain annually, mostly during the monsoon season from July to September. For a broader comparison, see our Arizona Weather guide.
How does Phoenix weather change month to month?
If you’re checking phoenix weather december or phoenix weather january, expect mild days around 18–20°C and cool nights. By phoenix weather february, temperatures begin climbing toward 22°C. The heat builds sharply from May, with phoenix weather 10 day forecasts in June often showing consecutive 40°C days. For extended planning, a phoenix weather 15 day outlook or phoenix weather next 30 days projection can help you avoid the peak of summer. All temperatures are given in phoenix weather celsius for Australian readers.
When is the best time to visit Phoenix for Australians?
November to March offers the most comfortable conditions, with daytime highs between 19°C and 25°C. This avoids the extreme summer heat and is ideal for exploring the Sonoran Desert or hiking Camelback Mountain.
Does Phoenix get cold at night?
Yes, especially in winter. December and January nights can drop to 6–8°C, so pack layers. The dry air means temperatures fall quickly after sunset, a sharp contrast to the daytime warmth.
How does Phoenix compare to Australian desert cities?
Phoenix is similar to Alice Springs in summer heat but has milder winters. Both share low humidity and clear skies, though Phoenix’s monsoon season brings brief, intense thunderstorms that are less common in central Australia.