Phoenix (AZ) Temperature by Month
Phoenix in Arizona, United States of America sees significant seasonal temperature differences, with daytime highs between 19°C (66°F) in January and 41°C (106°F) in July, averaging 31°C (88°F) annually. Explore the full monthly breakdown below.
Phoenix Monthly Temperatures
With significant temperature fluctuations, Phoenix enjoys distinct seasons year-round. Nighttime lows range from 28°C (82°F) in July to 6°C (43°F) in January.
The chart below illustrates the average maximum day and minimum night temperatures in Phoenix by month:
From around 4 AM to 6 AM temperatures are at their lowest; by 3 PM they've climbed to their daily peak. July, the warmest month, averages 378 hours of sunshine.
The chart below shows the average temperature throughout the year:
Daily Historical Temperatures
50-year average (1976-2025)
Average high and low temperatures for each day of the month based on long-term records.
Average temperatures in July
Historical Phoenix Temperatures: 1976-2026
Browse day-by-day temperature records for Phoenix spanning 51 years. Select any month and year to see actual high and low temperatures recorded on each day.
Temperature: Phoenix vs the United States of America
The map below shows the annual temperature across the United States of America. You can also select individual months if you want to compare a specific time of year.
very warm
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moderate
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Phoenix vs World: Temperature Compared
Phoenix's average annual maximum temperature is 31°C (88°F). To put that in context, here's how it compares to a few well-known destinations:
Athens, Greece sits at 23°C (73°F) on average, with hot dry summers and mild winters characteristic of the Mediterranean.
On the cooler end, Oslo, Norway averages just 10°C (50°F) annually, with pleasant summers but long, cold winters.
Seoul, South Korea averages 18°C (64°F) a year, with four clear seasons, cold winters, and hot humid summers.
Adelaide, Australia averages 21°C (70°F) a year, with warm summers, mild winters, and relatively low rainfall year-round.
What Does the Temperature Feel Like in Phoenix?
Temperature alone doesn't tell the whole story — humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.
In Phoenix, January is the coolest month, with average highs of 20°C (68°F) and humidity around 50% — considered moderate. In July, the warmest month, temperatures average 41°C (106°F) with 31% humidity — conditions that feel low. For a full picture, see our humidity page.
Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.
The readings come from a range of sources — land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.
For cities and regions with significant elevation, altitude is one of the biggest factors shaping local temperatures. As a rule of thumb, temperatures fall by around 6°C for every 1,000 metres gained — so a city at 2,000 metres will typically be around 12°C cooler than a city at sea level in the same region. Higher ground also tends to see more dramatic day-to-night temperature swings, since thinner air loses heat faster after sunset.
For more on Phoenix's weather — including monthly rainfall, sunshine hours, and humidity — visit our Phoenix climate page.
