Phoenix, Arizona weather in March

Averages from 2021–2025 (155 days of record).

Average high: 74°F
Average low: 50°F
Rainy days: ~5 per month
Total precipitation: 1.4 in
Warmest recorded: 97°F
Coldest recorded: 34°F

Expect March days in Phoenix, Arizona to top out around 74°F and cool to about 50°F overnight, with roughly 5 days of measurable rain across the month. In recent years March has ranged from 34°F to 97°F.

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Current Phoenix, Arizona forecast → · Historical data by Open-Meteo (ERA5).